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_CRC32_SIZE 4
130 #define BTRFS_EMPTY_DIR_SIZE 0
132 #define BTRFS_FT_UNKNOWN 0
133 #define BTRFS_FT_REG_FILE 1
134 #define BTRFS_FT_DIR 2
135 #define BTRFS_FT_CHRDEV 3
136 #define BTRFS_FT_BLKDEV 4
137 #define BTRFS_FT_FIFO 5
138 #define BTRFS_FT_SOCK 6
139 #define BTRFS_FT_SYMLINK 7
140 #define BTRFS_FT_XATTR 8
141 #define BTRFS_FT_MAX 9
144 * the key defines the order in the tree, and so it also defines (optimal)
145 * block layout. objectid corresonds to the inode number. The flags
146 * tells us things about the object, and is a kind of stream selector.
147 * so for a given inode, keys with flags of 1 might refer to the inode
148 * data, flags of 2 may point to file data in the btree and flags == 3
149 * may point to extents.
151 * offset is the starting byte offset for this key in the stream.
153 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
154 * in cpu native order. Otherwise they are identical and their sizes
155 * should be the same (ie both packed)
157 struct btrfs_disk_key {
161 } __attribute__ ((__packed__));
167 } __attribute__ ((__packed__));
169 struct btrfs_mapping_tree {
170 struct extent_map_tree map_tree;
173 #define BTRFS_UUID_SIZE 16
174 struct btrfs_dev_item {
175 /* the internal btrfs device id */
178 /* size of the device */
184 /* optimal io alignment for this device */
187 /* optimal io width for this device */
190 /* minimal io size for this device */
193 /* type and info about this device */
196 /* expected generation for this device */
200 * starting byte of this partition on the device,
201 * to allowr for stripe alignment in the future
205 /* grouping information for allocation decisions */
208 /* seek speed 0-100 where 100 is fastest */
211 /* bandwidth 0-100 where 100 is fastest */
214 /* btrfs generated uuid for this device */
215 u8 uuid[BTRFS_UUID_SIZE];
217 /* uuid of FS who owns this device */
218 u8 fsid[BTRFS_UUID_SIZE];
219 } __attribute__ ((__packed__));
221 struct btrfs_stripe {
224 u8 dev_uuid[BTRFS_UUID_SIZE];
225 } __attribute__ ((__packed__));
228 /* size of this chunk in bytes */
231 /* objectid of the root referencing this chunk */
237 /* optimal io alignment for this chunk */
240 /* optimal io width for this chunk */
243 /* minimal io size for this chunk */
246 /* 2^16 stripes is quite a lot, a second limit is the size of a single
251 /* sub stripes only matter for raid10 */
253 struct btrfs_stripe stripe;
254 /* additional stripes go here */
255 } __attribute__ ((__packed__));
257 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
259 BUG_ON(num_stripes == 0);
260 return sizeof(struct btrfs_chunk) +
261 sizeof(struct btrfs_stripe) * (num_stripes - 1);
264 #define BTRFS_FSID_SIZE 16
265 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
268 * every tree block (leaf or node) starts with this header.
270 struct btrfs_header {
271 /* these first four must match the super block */
272 u8 csum[BTRFS_CSUM_SIZE];
273 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
274 __le64 bytenr; /* which block this node is supposed to live in */
277 /* allowed to be different from the super from here on down */
278 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
283 } __attribute__ ((__packed__));
285 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
286 sizeof(struct btrfs_header)) / \
287 sizeof(struct btrfs_key_ptr))
288 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
289 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
290 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
291 sizeof(struct btrfs_item) - \
292 sizeof(struct btrfs_file_extent_item))
294 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
297 * this is a very generous portion of the super block, giving us
298 * room to translate 14 chunks with 3 stripes each.
300 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
301 #define BTRFS_LABEL_SIZE 256
304 * the super block basically lists the main trees of the FS
305 * it currently lacks any block count etc etc
307 struct btrfs_super_block {
308 u8 csum[BTRFS_CSUM_SIZE];
309 /* the first 4 fields must match struct btrfs_header */
310 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
311 __le64 bytenr; /* this block number */
314 /* allowed to be different from the btrfs_header from here own down */
321 /* this will help find the new super based on the log root */
322 __le64 log_root_transid;
325 __le64 root_dir_objectid;
331 __le32 sys_chunk_array_size;
332 __le64 chunk_root_generation;
334 __le64 compat_ro_flags;
335 __le64 incompat_flags;
340 struct btrfs_dev_item dev_item;
342 char label[BTRFS_LABEL_SIZE];
344 /* future expansion */
346 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
347 } __attribute__ ((__packed__));
350 * Compat flags that we support. If any incompat flags are set other than the
351 * ones specified below then we will fail to mount
353 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
354 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
355 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
358 * A leaf is full of items. offset and size tell us where to find
359 * the item in the leaf (relative to the start of the data area)
362 struct btrfs_disk_key key;
365 } __attribute__ ((__packed__));
368 * leaves have an item area and a data area:
369 * [item0, item1....itemN] [free space] [dataN...data1, data0]
371 * The data is separate from the items to get the keys closer together
375 struct btrfs_header header;
376 struct btrfs_item items[];
377 } __attribute__ ((__packed__));
380 * all non-leaf blocks are nodes, they hold only keys and pointers to
383 struct btrfs_key_ptr {
384 struct btrfs_disk_key key;
387 } __attribute__ ((__packed__));
390 struct btrfs_header header;
391 struct btrfs_key_ptr ptrs[];
392 } __attribute__ ((__packed__));
395 * btrfs_paths remember the path taken from the root down to the leaf.
396 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
397 * to any other levels that are present.
399 * The slots array records the index of the item or block pointer
400 * used while walking the tree.
403 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
404 int slots[BTRFS_MAX_LEVEL];
405 /* if there is real range locking, this locks field will change */
406 int locks[BTRFS_MAX_LEVEL];
408 /* keep some upper locks as we walk down */
414 * set by btrfs_split_item, tells search_slot to keep all locks
415 * and to force calls to keep space in the nodes
417 int search_for_split;
421 * items in the extent btree are used to record the objectid of the
422 * owner of the block and the number of references
424 struct btrfs_extent_item {
426 } __attribute__ ((__packed__));
428 struct btrfs_extent_ref {
433 } __attribute__ ((__packed__));
435 /* dev extents record free space on individual devices. The owner
436 * field points back to the chunk allocation mapping tree that allocated
437 * the extent. The chunk tree uuid field is a way to double check the owner
439 struct btrfs_dev_extent {
441 __le64 chunk_objectid;
444 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
445 } __attribute__ ((__packed__));
447 struct btrfs_inode_ref {
451 } __attribute__ ((__packed__));
453 struct btrfs_timespec {
456 } __attribute__ ((__packed__));
459 BTRFS_COMPRESS_NONE = 0,
460 BTRFS_COMPRESS_ZLIB = 1,
461 BTRFS_COMPRESS_LAST = 2,
462 } btrfs_compression_type;
464 /* we don't understand any encryption methods right now */
466 BTRFS_ENCRYPTION_NONE = 0,
467 BTRFS_ENCRYPTION_LAST = 1,
468 } btrfs_encryption_type;
470 struct btrfs_inode_item {
471 /* nfs style generation number */
473 /* transid that last touched this inode */
485 /* modification sequence number for NFS */
489 * a little future expansion, for more than this we can
490 * just grow the inode item and version it
493 struct btrfs_timespec atime;
494 struct btrfs_timespec ctime;
495 struct btrfs_timespec mtime;
496 struct btrfs_timespec otime;
497 } __attribute__ ((__packed__));
499 struct btrfs_dir_log_item {
501 } __attribute__ ((__packed__));
503 struct btrfs_dir_item {
504 struct btrfs_disk_key location;
509 } __attribute__ ((__packed__));
511 struct btrfs_root_item {
512 struct btrfs_inode_item inode;
518 __le64 last_snapshot;
521 struct btrfs_disk_key drop_progress;
524 } __attribute__ ((__packed__));
527 * this is used for both forward and backward root refs
529 struct btrfs_root_ref {
533 } __attribute__ ((__packed__));
535 #define BTRFS_FILE_EXTENT_INLINE 0
536 #define BTRFS_FILE_EXTENT_REG 1
537 #define BTRFS_FILE_EXTENT_PREALLOC 2
539 struct btrfs_file_extent_item {
541 * transaction id that created this extent
545 * max number of bytes to hold this extent in ram
546 * when we split a compressed extent we can't know how big
547 * each of the resulting pieces will be. So, this is
548 * an upper limit on the size of the extent in ram instead of
554 * 32 bits for the various ways we might encode the data,
555 * including compression and encryption. If any of these
556 * are set to something a given disk format doesn't understand
557 * it is treated like an incompat flag for reading and writing,
562 __le16 other_encoding; /* spare for later use */
564 /* are we inline data or a real extent? */
568 * disk space consumed by the extent, checksum blocks are included
572 __le64 disk_num_bytes;
574 * the logical offset in file blocks (no csums)
575 * this extent record is for. This allows a file extent to point
576 * into the middle of an existing extent on disk, sharing it
577 * between two snapshots (useful if some bytes in the middle of the
578 * extent have changed
582 * the logical number of file blocks (no csums included). This
583 * always reflects the size uncompressed and without encoding.
587 } __attribute__ ((__packed__));
589 struct btrfs_csum_item {
591 } __attribute__ ((__packed__));
593 /* different types of block groups (and chunks) */
594 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
595 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
596 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
597 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
598 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
599 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
600 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
602 struct btrfs_block_group_item {
604 __le64 chunk_objectid;
606 } __attribute__ ((__packed__));
608 struct btrfs_space_info {
617 struct list_head list;
619 /* for block groups in our same type */
620 struct list_head block_groups;
622 struct rw_semaphore groups_sem;
625 struct btrfs_free_space {
626 struct rb_node bytes_index;
627 struct rb_node offset_index;
632 struct btrfs_block_group_cache {
633 struct btrfs_key key;
634 struct btrfs_block_group_item item;
636 struct mutex alloc_mutex;
637 struct mutex cache_mutex;
645 struct btrfs_space_info *space_info;
647 /* free space cache stuff */
648 struct rb_root free_space_bytes;
649 struct rb_root free_space_offset;
651 /* block group cache stuff */
652 struct rb_node cache_node;
654 /* for block groups in the same raid type */
655 struct list_head list;
661 struct btrfs_leaf_ref_tree {
663 struct list_head list;
668 struct btrfs_fs_devices;
669 struct btrfs_fs_info {
670 u8 fsid[BTRFS_FSID_SIZE];
671 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
672 struct btrfs_root *extent_root;
673 struct btrfs_root *tree_root;
674 struct btrfs_root *chunk_root;
675 struct btrfs_root *dev_root;
676 struct btrfs_root *fs_root;
677 struct btrfs_root *csum_root;
679 /* the log root tree is a directory of all the other log roots */
680 struct btrfs_root *log_root_tree;
681 struct radix_tree_root fs_roots_radix;
683 /* block group cache stuff */
684 spinlock_t block_group_cache_lock;
685 struct rb_root block_group_cache_tree;
687 struct extent_io_tree pinned_extents;
688 struct extent_io_tree pending_del;
689 struct extent_io_tree extent_ins;
691 /* logical->physical extent mapping */
692 struct btrfs_mapping_tree mapping_tree;
695 u64 last_trans_committed;
696 u64 last_trans_new_blockgroup;
697 u64 open_ioctl_trans;
698 unsigned long mount_opt;
702 struct btrfs_transaction *running_transaction;
703 wait_queue_head_t transaction_throttle;
704 wait_queue_head_t transaction_wait;
706 wait_queue_head_t async_submit_wait;
707 wait_queue_head_t tree_log_wait;
709 struct btrfs_super_block super_copy;
710 struct btrfs_super_block super_for_commit;
711 struct block_device *__bdev;
712 struct super_block *sb;
713 struct inode *btree_inode;
714 struct backing_dev_info bdi;
715 spinlock_t hash_lock;
716 struct mutex trans_mutex;
717 struct mutex tree_log_mutex;
718 struct mutex transaction_kthread_mutex;
719 struct mutex cleaner_mutex;
720 struct mutex extent_ins_mutex;
721 struct mutex pinned_mutex;
722 struct mutex chunk_mutex;
723 struct mutex drop_mutex;
724 struct mutex volume_mutex;
725 struct mutex tree_reloc_mutex;
726 struct list_head trans_list;
727 struct list_head hashers;
728 struct list_head dead_roots;
730 atomic_t nr_async_submits;
731 atomic_t async_submit_draining;
732 atomic_t nr_async_bios;
733 atomic_t async_delalloc_pages;
734 atomic_t tree_log_writers;
735 atomic_t tree_log_commit;
736 unsigned long tree_log_batch;
737 u64 tree_log_transid;
740 * this is used by the balancing code to wait for all the pending
743 spinlock_t ordered_extent_lock;
744 struct list_head ordered_extents;
745 struct list_head delalloc_inodes;
748 * there is a pool of worker threads for checksumming during writes
749 * and a pool for checksumming after reads. This is because readers
750 * can run with FS locks held, and the writers may be waiting for
751 * those locks. We don't want ordering in the pending list to cause
752 * deadlocks, and so the two are serviced separately.
754 * A third pool does submit_bio to avoid deadlocking with the other
757 struct btrfs_workers workers;
758 struct btrfs_workers delalloc_workers;
759 struct btrfs_workers endio_workers;
760 struct btrfs_workers endio_meta_workers;
761 struct btrfs_workers endio_meta_write_workers;
762 struct btrfs_workers endio_write_workers;
763 struct btrfs_workers submit_workers;
765 * fixup workers take dirty pages that didn't properly go through
766 * the cow mechanism and make them safe to write. It happens
767 * for the sys_munmap function call path
769 struct btrfs_workers fixup_workers;
770 struct task_struct *transaction_kthread;
771 struct task_struct *cleaner_kthread;
772 int thread_pool_size;
774 /* tree relocation relocated fields */
775 struct list_head dead_reloc_roots;
776 struct btrfs_leaf_ref_tree reloc_ref_tree;
777 struct btrfs_leaf_ref_tree shared_ref_tree;
779 struct kobject super_kobj;
780 struct completion kobj_unregister;
783 int log_root_recovering;
785 atomic_t throttle_gen;
788 struct list_head dirty_cowonly_roots;
790 struct btrfs_fs_devices *fs_devices;
791 struct list_head space_info;
792 spinlock_t delalloc_lock;
793 spinlock_t new_trans_lock;
798 spinlock_t ref_cache_lock;
799 u64 total_ref_cache_size;
801 u64 avail_data_alloc_bits;
802 u64 avail_metadata_alloc_bits;
803 u64 avail_system_alloc_bits;
804 u64 data_alloc_profile;
805 u64 metadata_alloc_profile;
806 u64 system_alloc_profile;
812 * in ram representation of the tree. extent_root is used for all allocations
813 * and for the extent tree extent_root root.
815 struct btrfs_dirty_root;
817 struct extent_buffer *node;
819 /* the node lock is held while changing the node pointer */
820 spinlock_t node_lock;
822 struct extent_buffer *commit_root;
823 struct btrfs_leaf_ref_tree *ref_tree;
824 struct btrfs_leaf_ref_tree ref_tree_struct;
825 struct btrfs_dirty_root *dirty_root;
826 struct btrfs_root *log_root;
827 struct btrfs_root *reloc_root;
829 struct btrfs_root_item root_item;
830 struct btrfs_key root_key;
831 struct btrfs_fs_info *fs_info;
832 struct extent_io_tree dirty_log_pages;
834 struct kobject root_kobj;
835 struct completion kobj_unregister;
836 struct mutex objectid_mutex;
837 struct mutex log_mutex;
842 /* data allocations are done in sectorsize units */
845 /* node allocations are done in nodesize units */
848 /* leaf allocations are done in leafsize units */
855 u64 last_inode_alloc;
858 u64 defrag_trans_start;
859 struct btrfs_key defrag_progress;
860 struct btrfs_key defrag_max;
866 /* the dirty list is only used by non-reference counted roots */
867 struct list_head dirty_list;
869 spinlock_t list_lock;
870 struct list_head dead_list;
871 struct list_head orphan_list;
874 * right now this just gets used so that a root has its own devid
875 * for stat. It may be used for more later
877 struct super_block anon_super;
882 * inode items have the data typically returned from stat and store other
883 * info about object characteristics. There is one for every file and dir in
886 #define BTRFS_INODE_ITEM_KEY 1
887 #define BTRFS_INODE_REF_KEY 12
888 #define BTRFS_XATTR_ITEM_KEY 24
889 #define BTRFS_ORPHAN_ITEM_KEY 48
890 /* reserve 2-15 close to the inode for later flexibility */
893 * dir items are the name -> inode pointers in a directory. There is one
894 * for every name in a directory.
896 #define BTRFS_DIR_LOG_ITEM_KEY 60
897 #define BTRFS_DIR_LOG_INDEX_KEY 72
898 #define BTRFS_DIR_ITEM_KEY 84
899 #define BTRFS_DIR_INDEX_KEY 96
901 * extent data is for file data
903 #define BTRFS_EXTENT_DATA_KEY 108
906 * extent csums are stored in a separate tree and hold csums for
907 * an entire extent on disk.
909 #define BTRFS_EXTENT_CSUM_KEY 128
912 * root items point to tree roots. There are typically in the root
913 * tree used by the super block to find all the other trees
915 #define BTRFS_ROOT_ITEM_KEY 132
918 * root backrefs tie subvols and snapshots to the directory entries that
921 #define BTRFS_ROOT_BACKREF_KEY 144
924 * root refs make a fast index for listing all of the snapshots and
925 * subvolumes referenced by a given root. They point directly to the
926 * directory item in the root that references the subvol
928 #define BTRFS_ROOT_REF_KEY 156
931 * extent items are in the extent map tree. These record which blocks
932 * are used, and how many references there are to each block
934 #define BTRFS_EXTENT_ITEM_KEY 168
935 #define BTRFS_EXTENT_REF_KEY 180
938 * block groups give us hints into the extent allocation trees. Which
939 * blocks are free etc etc
941 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
943 #define BTRFS_DEV_EXTENT_KEY 204
944 #define BTRFS_DEV_ITEM_KEY 216
945 #define BTRFS_CHUNK_ITEM_KEY 228
948 * string items are for debugging. They just store a short string of
951 #define BTRFS_STRING_ITEM_KEY 253
953 #define BTRFS_MOUNT_NODATASUM (1 << 0)
954 #define BTRFS_MOUNT_NODATACOW (1 << 1)
955 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
956 #define BTRFS_MOUNT_SSD (1 << 3)
957 #define BTRFS_MOUNT_DEGRADED (1 << 4)
958 #define BTRFS_MOUNT_COMPRESS (1 << 5)
960 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
961 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
962 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
967 #define BTRFS_INODE_NODATASUM (1 << 0)
968 #define BTRFS_INODE_NODATACOW (1 << 1)
969 #define BTRFS_INODE_READONLY (1 << 2)
970 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
971 #define BTRFS_INODE_PREALLOC (1 << 4)
972 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
974 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
976 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
978 /* some macros to generate set/get funcs for the struct fields. This
979 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
982 #define le8_to_cpu(v) (v)
983 #define cpu_to_le8(v) (v)
986 #define read_eb_member(eb, ptr, type, member, result) ( \
987 read_extent_buffer(eb, (char *)(result), \
988 ((unsigned long)(ptr)) + \
989 offsetof(type, member), \
990 sizeof(((type *)0)->member)))
992 #define write_eb_member(eb, ptr, type, member, result) ( \
993 write_extent_buffer(eb, (char *)(result), \
994 ((unsigned long)(ptr)) + \
995 offsetof(type, member), \
996 sizeof(((type *)0)->member)))
998 #ifndef BTRFS_SETGET_FUNCS
999 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1000 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1001 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1004 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1005 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1007 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1008 u##bits res = le##bits##_to_cpu(p->member); \
1009 kunmap_atomic(p, KM_USER0); \
1012 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1015 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1016 p->member = cpu_to_le##bits(val); \
1017 kunmap_atomic(p, KM_USER0); \
1020 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1021 static inline u##bits btrfs_##name(type *s) \
1023 return le##bits##_to_cpu(s->member); \
1025 static inline void btrfs_set_##name(type *s, u##bits val) \
1027 s->member = cpu_to_le##bits(val); \
1030 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1031 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1032 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1033 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1034 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1035 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1037 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1038 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1039 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1040 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1041 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1042 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1044 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1045 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1047 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1049 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1051 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1053 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1055 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1056 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1058 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1060 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1062 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1065 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1067 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1070 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1072 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1075 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1076 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1077 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1078 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1079 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1080 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1081 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1082 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1083 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1084 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1085 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1087 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1089 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1093 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1094 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1096 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1098 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1100 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1103 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1105 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1107 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1108 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1110 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1113 unsigned long offset = (unsigned long)c;
1114 offset += offsetof(struct btrfs_chunk, stripe);
1115 offset += nr * sizeof(struct btrfs_stripe);
1116 return (struct btrfs_stripe *)offset;
1119 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1121 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1124 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1125 struct btrfs_chunk *c, int nr)
1127 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1130 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1131 struct btrfs_chunk *c, int nr,
1134 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1137 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1138 struct btrfs_chunk *c, int nr)
1140 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1143 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1144 struct btrfs_chunk *c, int nr,
1147 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1150 /* struct btrfs_block_group_item */
1151 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1153 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1155 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1156 struct btrfs_block_group_item, chunk_objectid, 64);
1158 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1159 struct btrfs_block_group_item, chunk_objectid, 64);
1160 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1161 struct btrfs_block_group_item, flags, 64);
1162 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1163 struct btrfs_block_group_item, flags, 64);
1165 /* struct btrfs_inode_ref */
1166 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1167 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1169 /* struct btrfs_inode_item */
1170 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1171 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1172 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1173 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1174 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1175 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1176 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1177 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1178 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1179 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1180 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1181 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1183 static inline struct btrfs_timespec *
1184 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1186 unsigned long ptr = (unsigned long)inode_item;
1187 ptr += offsetof(struct btrfs_inode_item, atime);
1188 return (struct btrfs_timespec *)ptr;
1191 static inline struct btrfs_timespec *
1192 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1194 unsigned long ptr = (unsigned long)inode_item;
1195 ptr += offsetof(struct btrfs_inode_item, mtime);
1196 return (struct btrfs_timespec *)ptr;
1199 static inline struct btrfs_timespec *
1200 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1202 unsigned long ptr = (unsigned long)inode_item;
1203 ptr += offsetof(struct btrfs_inode_item, ctime);
1204 return (struct btrfs_timespec *)ptr;
1207 static inline struct btrfs_timespec *
1208 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1210 unsigned long ptr = (unsigned long)inode_item;
1211 ptr += offsetof(struct btrfs_inode_item, otime);
1212 return (struct btrfs_timespec *)ptr;
1215 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1216 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1218 /* struct btrfs_dev_extent */
1219 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1221 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1222 chunk_objectid, 64);
1223 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1225 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1227 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1229 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1230 return (u8 *)((unsigned long)dev + ptr);
1233 /* struct btrfs_extent_ref */
1234 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1235 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1236 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1237 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1239 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1240 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1242 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1244 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1247 /* struct btrfs_extent_item */
1248 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1249 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1252 /* struct btrfs_node */
1253 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1254 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1256 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1259 ptr = offsetof(struct btrfs_node, ptrs) +
1260 sizeof(struct btrfs_key_ptr) * nr;
1261 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1264 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1268 ptr = offsetof(struct btrfs_node, ptrs) +
1269 sizeof(struct btrfs_key_ptr) * nr;
1270 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1273 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1276 ptr = offsetof(struct btrfs_node, ptrs) +
1277 sizeof(struct btrfs_key_ptr) * nr;
1278 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1281 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1285 ptr = offsetof(struct btrfs_node, ptrs) +
1286 sizeof(struct btrfs_key_ptr) * nr;
1287 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1290 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1292 return offsetof(struct btrfs_node, ptrs) +
1293 sizeof(struct btrfs_key_ptr) * nr;
1296 void btrfs_node_key(struct extent_buffer *eb,
1297 struct btrfs_disk_key *disk_key, int nr);
1299 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1300 struct btrfs_disk_key *disk_key, int nr)
1303 ptr = btrfs_node_key_ptr_offset(nr);
1304 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1305 struct btrfs_key_ptr, key, disk_key);
1308 /* struct btrfs_item */
1309 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1310 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1312 static inline unsigned long btrfs_item_nr_offset(int nr)
1314 return offsetof(struct btrfs_leaf, items) +
1315 sizeof(struct btrfs_item) * nr;
1318 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1321 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1324 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1325 struct btrfs_item *item)
1327 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1330 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1332 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1335 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1337 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1340 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1342 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1345 static inline void btrfs_item_key(struct extent_buffer *eb,
1346 struct btrfs_disk_key *disk_key, int nr)
1348 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1349 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1352 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1353 struct btrfs_disk_key *disk_key, int nr)
1355 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1356 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1359 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1362 * struct btrfs_root_ref
1364 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1365 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1366 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1368 /* struct btrfs_dir_item */
1369 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1370 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1371 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1372 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1374 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1375 struct btrfs_dir_item *item,
1376 struct btrfs_disk_key *key)
1378 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1381 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1382 struct btrfs_dir_item *item,
1383 struct btrfs_disk_key *key)
1385 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1388 /* struct btrfs_disk_key */
1389 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1391 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1392 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1394 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1395 struct btrfs_disk_key *disk)
1397 cpu->offset = le64_to_cpu(disk->offset);
1398 cpu->type = disk->type;
1399 cpu->objectid = le64_to_cpu(disk->objectid);
1402 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1403 struct btrfs_key *cpu)
1405 disk->offset = cpu_to_le64(cpu->offset);
1406 disk->type = cpu->type;
1407 disk->objectid = cpu_to_le64(cpu->objectid);
1410 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1411 struct btrfs_key *key, int nr)
1413 struct btrfs_disk_key disk_key;
1414 btrfs_node_key(eb, &disk_key, nr);
1415 btrfs_disk_key_to_cpu(key, &disk_key);
1418 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1419 struct btrfs_key *key, int nr)
1421 struct btrfs_disk_key disk_key;
1422 btrfs_item_key(eb, &disk_key, nr);
1423 btrfs_disk_key_to_cpu(key, &disk_key);
1426 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1427 struct btrfs_dir_item *item,
1428 struct btrfs_key *key)
1430 struct btrfs_disk_key disk_key;
1431 btrfs_dir_item_key(eb, item, &disk_key);
1432 btrfs_disk_key_to_cpu(key, &disk_key);
1436 static inline u8 btrfs_key_type(struct btrfs_key *key)
1441 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1446 /* struct btrfs_header */
1447 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1448 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1450 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1451 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1452 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1453 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1455 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1457 return (btrfs_header_flags(eb) & flag) == flag;
1460 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1462 u64 flags = btrfs_header_flags(eb);
1463 btrfs_set_header_flags(eb, flags | flag);
1464 return (flags & flag) == flag;
1467 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1469 u64 flags = btrfs_header_flags(eb);
1470 btrfs_set_header_flags(eb, flags & ~flag);
1471 return (flags & flag) == flag;
1474 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1476 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1480 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1482 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1486 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1488 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1492 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1494 unsigned long ptr = offsetof(struct btrfs_header, csum);
1498 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1503 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1508 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1513 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1515 return (btrfs_header_level(eb) == 0);
1518 /* struct btrfs_root_item */
1519 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1521 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1522 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1523 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1525 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1527 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1528 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1529 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1530 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1531 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1532 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1533 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1534 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1537 /* struct btrfs_super_block */
1539 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1540 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1541 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1543 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1544 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1545 struct btrfs_super_block, sys_chunk_array_size, 32);
1546 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1547 struct btrfs_super_block, chunk_root_generation, 64);
1548 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1550 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1552 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1553 chunk_root_level, 8);
1554 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1556 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1557 log_root_transid, 64);
1558 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1560 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1562 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1564 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1566 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1568 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1570 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1572 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1573 root_dir_objectid, 64);
1574 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1576 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1578 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1580 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1581 incompat_flags, 64);
1582 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1585 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1587 int t = btrfs_super_csum_type(s);
1588 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1589 return btrfs_csum_sizes[t];
1592 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1594 return offsetof(struct btrfs_leaf, items);
1597 /* struct btrfs_file_extent_item */
1598 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1600 static inline unsigned long btrfs_file_extent_inline_start(struct
1601 btrfs_file_extent_item *e)
1603 unsigned long offset = (unsigned long)e;
1604 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1608 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1610 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1613 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1615 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1617 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1618 disk_num_bytes, 64);
1619 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1621 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1623 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1625 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1627 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1629 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1630 other_encoding, 16);
1632 /* this returns the number of file bytes represented by the inline item.
1633 * If an item is compressed, this is the uncompressed size
1635 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1636 struct btrfs_file_extent_item *e)
1638 return btrfs_file_extent_ram_bytes(eb, e);
1642 * this returns the number of bytes used by the item on disk, minus the
1643 * size of any extent headers. If a file is compressed on disk, this is
1644 * the compressed size
1646 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1647 struct btrfs_item *e)
1649 unsigned long offset;
1650 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1651 return btrfs_item_size(eb, e) - offset;
1654 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1656 return sb->s_fs_info;
1659 static inline int btrfs_set_root_name(struct btrfs_root *root,
1660 const char *name, int len)
1662 /* if we already have a name just free it */
1666 root->name = kmalloc(len+1, GFP_KERNEL);
1670 memcpy(root->name, name, len);
1671 root->name[len] ='\0';
1676 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1678 return root->leafsize;
1679 return root->nodesize;
1682 /* helper function to cast into the data area of the leaf. */
1683 #define btrfs_item_ptr(leaf, slot, type) \
1684 ((type *)(btrfs_leaf_data(leaf) + \
1685 btrfs_item_offset_nr(leaf, slot)))
1687 #define btrfs_item_ptr_offset(leaf, slot) \
1688 ((unsigned long)(btrfs_leaf_data(leaf) + \
1689 btrfs_item_offset_nr(leaf, slot)))
1691 static inline struct dentry *fdentry(struct file *file)
1693 return file->f_path.dentry;
1697 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1698 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root, u64 bytenr,
1700 u64 num_bytes, u32 *refs);
1701 int btrfs_update_pinned_extents(struct btrfs_root *root,
1702 u64 bytenr, u64 num, int pin);
1703 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1704 struct btrfs_root *root, struct extent_buffer *leaf);
1705 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1706 struct btrfs_root *root, u64 objectid, u64 bytenr);
1707 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1708 struct btrfs_root *root);
1709 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1710 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1711 btrfs_fs_info *info,
1713 u64 btrfs_find_block_group(struct btrfs_root *root,
1714 u64 search_start, u64 search_hint, int owner);
1715 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root,
1717 u32 blocksize, u64 parent,
1723 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *root,
1725 u64 bytenr, u32 blocksize);
1726 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1727 struct btrfs_root *root,
1728 u64 num_bytes, u64 parent, u64 min_bytes,
1729 u64 root_objectid, u64 ref_generation,
1730 u64 owner, u64 empty_size, u64 hint_byte,
1731 u64 search_end, struct btrfs_key *ins, u64 data);
1732 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1733 struct btrfs_root *root, u64 parent,
1734 u64 root_objectid, u64 ref_generation,
1735 u64 owner, struct btrfs_key *ins);
1736 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1737 struct btrfs_root *root, u64 parent,
1738 u64 root_objectid, u64 ref_generation,
1739 u64 owner, struct btrfs_key *ins);
1740 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1741 struct btrfs_root *root,
1742 u64 num_bytes, u64 min_alloc_size,
1743 u64 empty_size, u64 hint_byte,
1744 u64 search_end, struct btrfs_key *ins,
1746 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1747 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1749 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1750 struct extent_buffer *buf, u32 nr_extents);
1751 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1752 struct btrfs_root *root, struct extent_buffer *orig_buf,
1753 struct extent_buffer *buf, int start_slot, int nr);
1754 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root,
1756 u64 bytenr, u64 num_bytes, u64 parent,
1757 u64 root_objectid, u64 ref_generation,
1758 u64 owner_objectid, int pin);
1759 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1760 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1761 struct btrfs_root *root,
1762 struct extent_io_tree *unpin);
1763 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1764 struct btrfs_root *root,
1765 u64 bytenr, u64 num_bytes, u64 parent,
1766 u64 root_objectid, u64 ref_generation,
1767 u64 owner_objectid);
1768 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1769 struct btrfs_root *root, u64 bytenr,
1770 u64 orig_parent, u64 parent,
1771 u64 root_objectid, u64 ref_generation,
1772 u64 owner_objectid);
1773 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1774 struct btrfs_root *root);
1775 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1776 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1777 int btrfs_read_block_groups(struct btrfs_root *root);
1778 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1779 struct btrfs_root *root, u64 bytes_used,
1780 u64 type, u64 chunk_objectid, u64 chunk_offset,
1782 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1783 struct btrfs_root *root, u64 group_start);
1784 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1785 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root);
1787 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1788 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1789 struct btrfs_root *root,
1790 struct extent_buffer *buf, u64 orig_start);
1791 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1792 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1793 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1794 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1796 int btrfs_previous_item(struct btrfs_root *root,
1797 struct btrfs_path *path, u64 min_objectid,
1799 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1800 struct btrfs_root *root,
1801 struct btrfs_key *node_keys,
1802 u64 *nodes, int lowest_level);
1803 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1804 struct btrfs_root *root, struct btrfs_path *path,
1805 struct btrfs_key *new_key);
1806 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1807 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1808 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1809 struct btrfs_key *key, int lowest_level,
1810 int cache_only, u64 min_trans);
1811 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1812 struct btrfs_key *max_key,
1813 struct btrfs_path *path, int cache_only,
1815 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1816 struct btrfs_root *root, struct extent_buffer *buf,
1817 struct extent_buffer *parent, int parent_slot,
1818 struct extent_buffer **cow_ret, u64 prealloc_dest);
1819 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1820 struct btrfs_root *root,
1821 struct extent_buffer *buf,
1822 struct extent_buffer **cow_ret, u64 new_root_objectid);
1823 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1824 *root, struct btrfs_path *path, u32 data_size);
1825 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1826 struct btrfs_root *root,
1827 struct btrfs_path *path,
1828 u32 new_size, int from_end);
1829 int btrfs_split_item(struct btrfs_trans_handle *trans,
1830 struct btrfs_root *root,
1831 struct btrfs_path *path,
1832 struct btrfs_key *new_key,
1833 unsigned long split_offset);
1834 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1835 *root, struct btrfs_key *key, struct btrfs_path *p, int
1837 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root, struct extent_buffer *parent,
1839 int start_slot, int cache_only, u64 *last_ret,
1840 struct btrfs_key *progress);
1841 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1842 struct btrfs_path *btrfs_alloc_path(void);
1843 void btrfs_free_path(struct btrfs_path *p);
1844 void btrfs_init_path(struct btrfs_path *p);
1845 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1846 struct btrfs_path *path, int slot, int nr);
1847 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1848 struct btrfs_root *root,
1849 struct btrfs_path *path, u64 bytenr);
1850 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1851 struct btrfs_root *root,
1852 struct btrfs_path *path)
1854 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1857 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1858 *root, struct btrfs_key *key, void *data, u32 data_size);
1859 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1860 struct btrfs_root *root,
1861 struct btrfs_path *path,
1862 struct btrfs_key *cpu_key, u32 *data_size,
1864 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1865 struct btrfs_root *root,
1866 struct btrfs_path *path,
1867 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1869 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1870 struct btrfs_root *root,
1871 struct btrfs_path *path,
1872 struct btrfs_key *key,
1875 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1878 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1879 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1880 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1881 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1883 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1884 struct btrfs_root *root,
1885 struct extent_buffer *node,
1886 struct extent_buffer *parent);
1888 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1889 struct btrfs_path *path,
1890 u64 root_id, u64 ref_id);
1891 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1892 struct btrfs_root *tree_root,
1893 u64 root_id, u8 type, u64 ref_id,
1894 u64 dirid, u64 sequence,
1895 const char *name, int name_len);
1896 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1897 struct btrfs_key *key);
1898 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1899 *root, struct btrfs_key *key, struct btrfs_root_item
1901 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1902 *root, struct btrfs_key *key, struct btrfs_root_item
1904 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1905 btrfs_root_item *item, struct btrfs_key *key);
1906 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1907 u64 *found_objectid);
1908 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1909 struct btrfs_root *latest_root);
1911 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1912 *root, const char *name, int name_len, u64 dir,
1913 struct btrfs_key *location, u8 type, u64 index);
1914 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1915 struct btrfs_root *root,
1916 struct btrfs_path *path, u64 dir,
1917 const char *name, int name_len,
1919 struct btrfs_dir_item *
1920 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1921 struct btrfs_root *root,
1922 struct btrfs_path *path, u64 dir,
1923 u64 objectid, const char *name, int name_len,
1925 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1926 struct btrfs_path *path,
1927 const char *name, int name_len);
1928 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1929 struct btrfs_root *root,
1930 struct btrfs_path *path,
1931 struct btrfs_dir_item *di);
1932 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1933 struct btrfs_root *root, const char *name,
1934 u16 name_len, const void *data, u16 data_len,
1936 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1937 struct btrfs_root *root,
1938 struct btrfs_path *path, u64 dir,
1939 const char *name, u16 name_len,
1943 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1944 struct btrfs_root *root, u64 offset);
1945 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1946 struct btrfs_root *root, u64 offset);
1949 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *fs_root,
1951 u64 dirid, u64 *objectid);
1952 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1955 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1956 struct btrfs_root *root,
1957 const char *name, int name_len,
1958 u64 inode_objectid, u64 ref_objectid, u64 index);
1959 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1960 struct btrfs_root *root,
1961 const char *name, int name_len,
1962 u64 inode_objectid, u64 ref_objectid, u64 *index);
1963 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 struct btrfs_path *path, u64 objectid);
1966 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1967 *root, struct btrfs_path *path,
1968 struct btrfs_key *location, int mod);
1971 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1972 struct btrfs_root *root, u64 bytenr, u64 len);
1973 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1974 struct bio *bio, u32 *dst);
1975 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1976 struct btrfs_root *root,
1977 u64 objectid, u64 pos,
1978 u64 disk_offset, u64 disk_num_bytes,
1979 u64 num_bytes, u64 offset, u64 ram_bytes,
1980 u8 compression, u8 encryption, u16 other_encoding);
1981 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1982 struct btrfs_root *root,
1983 struct btrfs_path *path, u64 objectid,
1984 u64 bytenr, int mod);
1985 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1986 struct btrfs_root *root,
1987 struct btrfs_ordered_sum *sums);
1988 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1989 struct bio *bio, u64 file_start, int contig);
1990 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1991 u64 start, unsigned long len);
1992 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1993 struct btrfs_root *root,
1994 struct btrfs_path *path,
1995 u64 bytenr, int cow);
1996 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1997 struct btrfs_root *root, struct btrfs_path *path,
1999 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2000 u64 end, struct list_head *list);
2003 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2004 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2005 #define ClearPageChecked ClearPageFsMisc
2006 #define SetPageChecked SetPageFsMisc
2007 #define PageChecked PageFsMisc
2010 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2011 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2012 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root,
2014 struct inode *dir, struct inode *inode,
2015 const char *name, int name_len);
2016 int btrfs_add_link(struct btrfs_trans_handle *trans,
2017 struct inode *parent_inode, struct inode *inode,
2018 const char *name, int name_len, int add_backref, u64 index);
2019 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2020 struct btrfs_root *root,
2021 struct inode *inode, u64 new_size,
2024 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2025 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2026 int btrfs_writepages(struct address_space *mapping,
2027 struct writeback_control *wbc);
2028 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *new_root, struct dentry *dentry,
2030 u64 new_dirid, u64 alloc_hint);
2031 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2032 size_t size, struct bio *bio, unsigned long bio_flags);
2034 unsigned long btrfs_force_ra(struct address_space *mapping,
2035 struct file_ra_state *ra, struct file *file,
2036 pgoff_t offset, pgoff_t last_index);
2037 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
2039 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2040 int btrfs_readpage(struct file *file, struct page *page);
2041 void btrfs_delete_inode(struct inode *inode);
2042 void btrfs_put_inode(struct inode *inode);
2043 void btrfs_read_locked_inode(struct inode *inode);
2044 int btrfs_write_inode(struct inode *inode, int wait);
2045 void btrfs_dirty_inode(struct inode *inode);
2046 struct inode *btrfs_alloc_inode(struct super_block *sb);
2047 void btrfs_destroy_inode(struct inode *inode);
2048 int btrfs_init_cachep(void);
2049 void btrfs_destroy_cachep(void);
2050 long btrfs_ioctl_trans_end(struct file *file);
2051 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2052 struct btrfs_root *root, int wait);
2053 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2054 struct btrfs_root *root);
2055 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2056 struct btrfs_root *root, int *is_new);
2057 int btrfs_commit_write(struct file *file, struct page *page,
2058 unsigned from, unsigned to);
2059 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2060 size_t page_offset, u64 start, u64 end,
2062 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2063 struct btrfs_root *root,
2064 struct inode *inode);
2065 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2066 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2067 void btrfs_orphan_cleanup(struct btrfs_root *root);
2068 int btrfs_cont_expand(struct inode *inode, loff_t size);
2071 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2074 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2075 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2077 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2078 extern struct file_operations btrfs_file_operations;
2079 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2080 struct btrfs_root *root, struct inode *inode,
2081 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2082 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2083 struct btrfs_root *root,
2084 struct inode *inode, u64 start, u64 end);
2085 int btrfs_release_file(struct inode *inode, struct file *file);
2088 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2089 struct btrfs_root *root, int cache_only);
2092 int btrfs_init_sysfs(void);
2093 void btrfs_exit_sysfs(void);
2094 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2095 int btrfs_sysfs_add_root(struct btrfs_root *root);
2096 void btrfs_sysfs_del_root(struct btrfs_root *root);
2097 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2100 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2103 u64 btrfs_parse_size(char *str);
2104 int btrfs_parse_options(struct btrfs_root *root, char *options);
2105 int btrfs_sync_fs(struct super_block *sb, int wait);
2108 int btrfs_check_acl(struct inode *inode, int mask);
2109 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2110 int btrfs_acl_chmod(struct inode *inode);
2112 /* free-space-cache.c */
2113 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2114 u64 bytenr, u64 size);
2115 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2116 u64 offset, u64 bytes);
2117 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2118 u64 bytenr, u64 size);
2119 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2120 u64 offset, u64 bytes);
2121 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2123 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2124 *block_group, u64 offset,
2126 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2128 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);