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)
46 #define BTRFS_MAX_LEVEL 8
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
53 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
79 /* holds checksums of all the data extents */
80 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 /* orhpan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
89 /* for space balancing */
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* dummy objectid represents multiple objectids */
101 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
104 * All files have objectids in this range.
106 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
107 #define BTRFS_LAST_FREE_OBJECTID -256ULL
108 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
115 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
118 * we can actually store much bigger names, but lets not confuse the rest
121 #define BTRFS_NAME_LEN 255
123 /* 32 bytes in various csum fields */
124 #define BTRFS_CSUM_SIZE 32
127 #define BTRFS_CSUM_TYPE_CRC32 0
129 static int btrfs_csum_sizes[] = { 4, 0 };
131 /* four bytes for CRC32 */
132 #define BTRFS_EMPTY_DIR_SIZE 0
134 #define BTRFS_FT_UNKNOWN 0
135 #define BTRFS_FT_REG_FILE 1
136 #define BTRFS_FT_DIR 2
137 #define BTRFS_FT_CHRDEV 3
138 #define BTRFS_FT_BLKDEV 4
139 #define BTRFS_FT_FIFO 5
140 #define BTRFS_FT_SOCK 6
141 #define BTRFS_FT_SYMLINK 7
142 #define BTRFS_FT_XATTR 8
143 #define BTRFS_FT_MAX 9
146 * the key defines the order in the tree, and so it also defines (optimal)
147 * block layout. objectid corresonds to the inode number. The flags
148 * tells us things about the object, and is a kind of stream selector.
149 * so for a given inode, keys with flags of 1 might refer to the inode
150 * data, flags of 2 may point to file data in the btree and flags == 3
151 * may point to extents.
153 * offset is the starting byte offset for this key in the stream.
155 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
156 * in cpu native order. Otherwise they are identical and their sizes
157 * should be the same (ie both packed)
159 struct btrfs_disk_key {
163 } __attribute__ ((__packed__));
169 } __attribute__ ((__packed__));
171 struct btrfs_mapping_tree {
172 struct extent_map_tree map_tree;
175 #define BTRFS_UUID_SIZE 16
176 struct btrfs_dev_item {
177 /* the internal btrfs device id */
180 /* size of the device */
186 /* optimal io alignment for this device */
189 /* optimal io width for this device */
192 /* minimal io size for this device */
195 /* type and info about this device */
198 /* expected generation for this device */
202 * starting byte of this partition on the device,
203 * to allowr for stripe alignment in the future
207 /* grouping information for allocation decisions */
210 /* seek speed 0-100 where 100 is fastest */
213 /* bandwidth 0-100 where 100 is fastest */
216 /* btrfs generated uuid for this device */
217 u8 uuid[BTRFS_UUID_SIZE];
219 /* uuid of FS who owns this device */
220 u8 fsid[BTRFS_UUID_SIZE];
221 } __attribute__ ((__packed__));
223 struct btrfs_stripe {
226 u8 dev_uuid[BTRFS_UUID_SIZE];
227 } __attribute__ ((__packed__));
230 /* size of this chunk in bytes */
233 /* objectid of the root referencing this chunk */
239 /* optimal io alignment for this chunk */
242 /* optimal io width for this chunk */
245 /* minimal io size for this chunk */
248 /* 2^16 stripes is quite a lot, a second limit is the size of a single
253 /* sub stripes only matter for raid10 */
255 struct btrfs_stripe stripe;
256 /* additional stripes go here */
257 } __attribute__ ((__packed__));
259 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
261 BUG_ON(num_stripes == 0);
262 return sizeof(struct btrfs_chunk) +
263 sizeof(struct btrfs_stripe) * (num_stripes - 1);
266 #define BTRFS_FSID_SIZE 16
267 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
270 * every tree block (leaf or node) starts with this header.
272 struct btrfs_header {
273 /* these first four must match the super block */
274 u8 csum[BTRFS_CSUM_SIZE];
275 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
276 __le64 bytenr; /* which block this node is supposed to live in */
279 /* allowed to be different from the super from here on down */
280 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
285 } __attribute__ ((__packed__));
287 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
288 sizeof(struct btrfs_header)) / \
289 sizeof(struct btrfs_key_ptr))
290 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
291 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
292 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
293 sizeof(struct btrfs_item) - \
294 sizeof(struct btrfs_file_extent_item))
296 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
299 * this is a very generous portion of the super block, giving us
300 * room to translate 14 chunks with 3 stripes each.
302 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
303 #define BTRFS_LABEL_SIZE 256
306 * the super block basically lists the main trees of the FS
307 * it currently lacks any block count etc etc
309 struct btrfs_super_block {
310 u8 csum[BTRFS_CSUM_SIZE];
311 /* the first 4 fields must match struct btrfs_header */
312 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
313 __le64 bytenr; /* this block number */
316 /* allowed to be different from the btrfs_header from here own down */
323 /* this will help find the new super based on the log root */
324 __le64 log_root_transid;
327 __le64 root_dir_objectid;
333 __le32 sys_chunk_array_size;
334 __le64 chunk_root_generation;
336 __le64 compat_ro_flags;
337 __le64 incompat_flags;
342 struct btrfs_dev_item dev_item;
344 char label[BTRFS_LABEL_SIZE];
346 /* future expansion */
348 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
349 } __attribute__ ((__packed__));
352 * Compat flags that we support. If any incompat flags are set other than the
353 * ones specified below then we will fail to mount
355 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
356 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
357 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
360 * A leaf is full of items. offset and size tell us where to find
361 * the item in the leaf (relative to the start of the data area)
364 struct btrfs_disk_key key;
367 } __attribute__ ((__packed__));
370 * leaves have an item area and a data area:
371 * [item0, item1....itemN] [free space] [dataN...data1, data0]
373 * The data is separate from the items to get the keys closer together
377 struct btrfs_header header;
378 struct btrfs_item items[];
379 } __attribute__ ((__packed__));
382 * all non-leaf blocks are nodes, they hold only keys and pointers to
385 struct btrfs_key_ptr {
386 struct btrfs_disk_key key;
389 } __attribute__ ((__packed__));
392 struct btrfs_header header;
393 struct btrfs_key_ptr ptrs[];
394 } __attribute__ ((__packed__));
397 * btrfs_paths remember the path taken from the root down to the leaf.
398 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
399 * to any other levels that are present.
401 * The slots array records the index of the item or block pointer
402 * used while walking the tree.
405 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
406 int slots[BTRFS_MAX_LEVEL];
407 /* if there is real range locking, this locks field will change */
408 int locks[BTRFS_MAX_LEVEL];
410 /* 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 unsigned int search_for_split:1;
418 unsigned int keep_locks:1;
419 unsigned int skip_locking:1;
420 unsigned int leave_spinning:1;
424 * items in the extent btree are used to record the objectid of the
425 * owner of the block and the number of references
427 struct btrfs_extent_item {
429 } __attribute__ ((__packed__));
431 struct btrfs_extent_ref {
436 } __attribute__ ((__packed__));
438 /* dev extents record free space on individual devices. The owner
439 * field points back to the chunk allocation mapping tree that allocated
440 * the extent. The chunk tree uuid field is a way to double check the owner
442 struct btrfs_dev_extent {
444 __le64 chunk_objectid;
447 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
448 } __attribute__ ((__packed__));
450 struct btrfs_inode_ref {
454 } __attribute__ ((__packed__));
456 struct btrfs_timespec {
459 } __attribute__ ((__packed__));
461 enum btrfs_compression_type {
462 BTRFS_COMPRESS_NONE = 0,
463 BTRFS_COMPRESS_ZLIB = 1,
464 BTRFS_COMPRESS_LAST = 2,
467 struct btrfs_inode_item {
468 /* nfs style generation number */
470 /* transid that last touched this inode */
482 /* modification sequence number for NFS */
486 * a little future expansion, for more than this we can
487 * just grow the inode item and version it
490 struct btrfs_timespec atime;
491 struct btrfs_timespec ctime;
492 struct btrfs_timespec mtime;
493 struct btrfs_timespec otime;
494 } __attribute__ ((__packed__));
496 struct btrfs_dir_log_item {
498 } __attribute__ ((__packed__));
500 struct btrfs_dir_item {
501 struct btrfs_disk_key location;
506 } __attribute__ ((__packed__));
508 struct btrfs_root_item {
509 struct btrfs_inode_item inode;
515 __le64 last_snapshot;
518 struct btrfs_disk_key drop_progress;
521 } __attribute__ ((__packed__));
524 * this is used for both forward and backward root refs
526 struct btrfs_root_ref {
530 } __attribute__ ((__packed__));
532 #define BTRFS_FILE_EXTENT_INLINE 0
533 #define BTRFS_FILE_EXTENT_REG 1
534 #define BTRFS_FILE_EXTENT_PREALLOC 2
536 struct btrfs_file_extent_item {
538 * transaction id that created this extent
542 * max number of bytes to hold this extent in ram
543 * when we split a compressed extent we can't know how big
544 * each of the resulting pieces will be. So, this is
545 * an upper limit on the size of the extent in ram instead of
551 * 32 bits for the various ways we might encode the data,
552 * including compression and encryption. If any of these
553 * are set to something a given disk format doesn't understand
554 * it is treated like an incompat flag for reading and writing,
559 __le16 other_encoding; /* spare for later use */
561 /* are we inline data or a real extent? */
565 * disk space consumed by the extent, checksum blocks are included
569 __le64 disk_num_bytes;
571 * the logical offset in file blocks (no csums)
572 * this extent record is for. This allows a file extent to point
573 * into the middle of an existing extent on disk, sharing it
574 * between two snapshots (useful if some bytes in the middle of the
575 * extent have changed
579 * the logical number of file blocks (no csums included). This
580 * always reflects the size uncompressed and without encoding.
584 } __attribute__ ((__packed__));
586 struct btrfs_csum_item {
588 } __attribute__ ((__packed__));
590 /* different types of block groups (and chunks) */
591 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
592 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
593 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
594 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
595 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
596 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
597 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
599 struct btrfs_block_group_item {
601 __le64 chunk_objectid;
603 } __attribute__ ((__packed__));
605 struct btrfs_space_info {
608 u64 total_bytes; /* total bytes in the space */
609 u64 bytes_used; /* total bytes used on disk */
610 u64 bytes_pinned; /* total bytes pinned, will be freed when the
611 transaction finishes */
612 u64 bytes_reserved; /* total bytes the allocator has reserved for
613 current allocations */
614 u64 bytes_readonly; /* total bytes that are read only */
616 /* delalloc accounting */
617 u64 bytes_delalloc; /* number of bytes reserved for allocation,
618 this space is not necessarily reserved yet
620 u64 bytes_may_use; /* number of bytes that may be used for
623 int full; /* indicates that we cannot allocate any more
624 chunks for this space */
625 int force_alloc; /* set if we need to force a chunk alloc for
628 struct list_head list;
630 /* for block groups in our same type */
631 struct list_head block_groups;
633 struct rw_semaphore groups_sem;
637 * free clusters are used to claim free space in relatively large chunks,
638 * allowing us to do less seeky writes. They are used for all metadata
639 * allocations and data allocations in ssd mode.
641 struct btrfs_free_cluster {
643 spinlock_t refill_lock;
646 /* largest extent in this cluster */
649 /* first extent starting offset */
652 struct btrfs_block_group_cache *block_group;
654 * when a cluster is allocated from a block group, we put the
655 * cluster onto a list in the block group so that it can
656 * be freed before the block group is freed.
658 struct list_head block_group_list;
661 struct btrfs_block_group_cache {
662 struct btrfs_key key;
663 struct btrfs_block_group_item item;
665 struct mutex cache_mutex;
673 struct btrfs_space_info *space_info;
675 /* free space cache stuff */
676 spinlock_t tree_lock;
677 struct rb_root free_space_bytes;
678 struct rb_root free_space_offset;
680 /* block group cache stuff */
681 struct rb_node cache_node;
683 /* for block groups in the same raid type */
684 struct list_head list;
689 /* List of struct btrfs_free_clusters for this block group.
690 * Today it will only have one thing on it, but that may change
692 struct list_head cluster_list;
695 struct btrfs_leaf_ref_tree {
697 struct list_head list;
702 struct btrfs_fs_devices;
703 struct btrfs_fs_info {
704 u8 fsid[BTRFS_FSID_SIZE];
705 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
706 struct btrfs_root *extent_root;
707 struct btrfs_root *tree_root;
708 struct btrfs_root *chunk_root;
709 struct btrfs_root *dev_root;
710 struct btrfs_root *fs_root;
711 struct btrfs_root *csum_root;
713 /* the log root tree is a directory of all the other log roots */
714 struct btrfs_root *log_root_tree;
715 struct radix_tree_root fs_roots_radix;
717 /* block group cache stuff */
718 spinlock_t block_group_cache_lock;
719 struct rb_root block_group_cache_tree;
721 struct extent_io_tree pinned_extents;
723 /* logical->physical extent mapping */
724 struct btrfs_mapping_tree mapping_tree;
727 u64 last_trans_committed;
730 * this is updated to the current trans every time a full commit
731 * is required instead of the faster short fsync log commits
733 u64 last_trans_log_full_commit;
734 u64 open_ioctl_trans;
735 unsigned long mount_opt;
739 struct btrfs_transaction *running_transaction;
740 wait_queue_head_t transaction_throttle;
741 wait_queue_head_t transaction_wait;
742 wait_queue_head_t async_submit_wait;
744 struct btrfs_super_block super_copy;
745 struct btrfs_super_block super_for_commit;
746 struct block_device *__bdev;
747 struct super_block *sb;
748 struct inode *btree_inode;
749 struct backing_dev_info bdi;
750 struct mutex trans_mutex;
751 struct mutex tree_log_mutex;
752 struct mutex transaction_kthread_mutex;
753 struct mutex cleaner_mutex;
754 struct mutex chunk_mutex;
755 struct mutex drop_mutex;
756 struct mutex volume_mutex;
757 struct mutex tree_reloc_mutex;
760 * this protects the ordered operations list only while we are
761 * processing all of the entries on it. This way we make
762 * sure the commit code doesn't find the list temporarily empty
763 * because another function happens to be doing non-waiting preflush
764 * before jumping into the main commit.
766 struct mutex ordered_operations_mutex;
768 struct list_head trans_list;
769 struct list_head hashers;
770 struct list_head dead_roots;
772 atomic_t nr_async_submits;
773 atomic_t async_submit_draining;
774 atomic_t nr_async_bios;
775 atomic_t async_delalloc_pages;
778 * this is used by the balancing code to wait for all the pending
781 spinlock_t ordered_extent_lock;
784 * all of the data=ordered extents pending writeback
785 * these can span multiple transactions and basically include
786 * every dirty data page that isn't from nodatacow
788 struct list_head ordered_extents;
791 * all of the inodes that have delalloc bytes. It is possible for
792 * this list to be empty even when there is still dirty data=ordered
793 * extents waiting to finish IO.
795 struct list_head delalloc_inodes;
798 * special rename and truncate targets that must be on disk before
799 * we're allowed to commit. This is basically the ext3 style
802 struct list_head ordered_operations;
805 * there is a pool of worker threads for checksumming during writes
806 * and a pool for checksumming after reads. This is because readers
807 * can run with FS locks held, and the writers may be waiting for
808 * those locks. We don't want ordering in the pending list to cause
809 * deadlocks, and so the two are serviced separately.
811 * A third pool does submit_bio to avoid deadlocking with the other
814 struct btrfs_workers workers;
815 struct btrfs_workers delalloc_workers;
816 struct btrfs_workers endio_workers;
817 struct btrfs_workers endio_meta_workers;
818 struct btrfs_workers endio_meta_write_workers;
819 struct btrfs_workers endio_write_workers;
820 struct btrfs_workers submit_workers;
822 * fixup workers take dirty pages that didn't properly go through
823 * the cow mechanism and make them safe to write. It happens
824 * for the sys_munmap function call path
826 struct btrfs_workers fixup_workers;
827 struct task_struct *transaction_kthread;
828 struct task_struct *cleaner_kthread;
829 int thread_pool_size;
831 /* tree relocation relocated fields */
832 struct list_head dead_reloc_roots;
833 struct btrfs_leaf_ref_tree reloc_ref_tree;
834 struct btrfs_leaf_ref_tree shared_ref_tree;
836 struct kobject super_kobj;
837 struct completion kobj_unregister;
840 int log_root_recovering;
842 atomic_t throttle_gen;
846 /* protected by the delalloc lock, used to keep from writing
847 * metadata until there is a nice batch
849 u64 dirty_metadata_bytes;
850 struct list_head dirty_cowonly_roots;
852 struct btrfs_fs_devices *fs_devices;
855 * the space_info list is almost entirely read only. It only changes
856 * when we add a new raid type to the FS, and that happens
857 * very rarely. RCU is used to protect it.
859 struct list_head space_info;
861 spinlock_t delalloc_lock;
862 spinlock_t new_trans_lock;
865 /* data_alloc_cluster is only used in ssd mode */
866 struct btrfs_free_cluster data_alloc_cluster;
868 /* all metadata allocations go through this cluster */
869 struct btrfs_free_cluster meta_alloc_cluster;
871 spinlock_t ref_cache_lock;
872 u64 total_ref_cache_size;
874 u64 avail_data_alloc_bits;
875 u64 avail_metadata_alloc_bits;
876 u64 avail_system_alloc_bits;
877 u64 data_alloc_profile;
878 u64 metadata_alloc_profile;
879 u64 system_alloc_profile;
885 * in ram representation of the tree. extent_root is used for all allocations
886 * and for the extent tree extent_root root.
888 struct btrfs_dirty_root;
890 struct extent_buffer *node;
892 /* the node lock is held while changing the node pointer */
893 spinlock_t node_lock;
895 struct extent_buffer *commit_root;
896 struct btrfs_leaf_ref_tree *ref_tree;
897 struct btrfs_leaf_ref_tree ref_tree_struct;
898 struct btrfs_dirty_root *dirty_root;
899 struct btrfs_root *log_root;
900 struct btrfs_root *reloc_root;
902 struct btrfs_root_item root_item;
903 struct btrfs_key root_key;
904 struct btrfs_fs_info *fs_info;
905 struct extent_io_tree dirty_log_pages;
907 struct kobject root_kobj;
908 struct completion kobj_unregister;
909 struct mutex objectid_mutex;
911 struct mutex log_mutex;
912 wait_queue_head_t log_writer_wait;
913 wait_queue_head_t log_commit_wait[2];
914 atomic_t log_writers;
915 atomic_t log_commit[2];
916 unsigned long log_transid;
917 unsigned long log_batch;
922 /* data allocations are done in sectorsize units */
925 /* node allocations are done in nodesize units */
928 /* leaf allocations are done in leafsize units */
935 u64 last_inode_alloc;
938 u64 defrag_trans_start;
939 struct btrfs_key defrag_progress;
940 struct btrfs_key defrag_max;
946 /* the dirty list is only used by non-reference counted roots */
947 struct list_head dirty_list;
949 spinlock_t list_lock;
950 struct list_head dead_list;
951 struct list_head orphan_list;
954 * right now this just gets used so that a root has its own devid
955 * for stat. It may be used for more later
957 struct super_block anon_super;
962 * inode items have the data typically returned from stat and store other
963 * info about object characteristics. There is one for every file and dir in
966 #define BTRFS_INODE_ITEM_KEY 1
967 #define BTRFS_INODE_REF_KEY 12
968 #define BTRFS_XATTR_ITEM_KEY 24
969 #define BTRFS_ORPHAN_ITEM_KEY 48
970 /* reserve 2-15 close to the inode for later flexibility */
973 * dir items are the name -> inode pointers in a directory. There is one
974 * for every name in a directory.
976 #define BTRFS_DIR_LOG_ITEM_KEY 60
977 #define BTRFS_DIR_LOG_INDEX_KEY 72
978 #define BTRFS_DIR_ITEM_KEY 84
979 #define BTRFS_DIR_INDEX_KEY 96
981 * extent data is for file data
983 #define BTRFS_EXTENT_DATA_KEY 108
986 * extent csums are stored in a separate tree and hold csums for
987 * an entire extent on disk.
989 #define BTRFS_EXTENT_CSUM_KEY 128
992 * root items point to tree roots. There are typically in the root
993 * tree used by the super block to find all the other trees
995 #define BTRFS_ROOT_ITEM_KEY 132
998 * root backrefs tie subvols and snapshots to the directory entries that
1001 #define BTRFS_ROOT_BACKREF_KEY 144
1004 * root refs make a fast index for listing all of the snapshots and
1005 * subvolumes referenced by a given root. They point directly to the
1006 * directory item in the root that references the subvol
1008 #define BTRFS_ROOT_REF_KEY 156
1011 * extent items are in the extent map tree. These record which blocks
1012 * are used, and how many references there are to each block
1014 #define BTRFS_EXTENT_ITEM_KEY 168
1015 #define BTRFS_EXTENT_REF_KEY 180
1018 * block groups give us hints into the extent allocation trees. Which
1019 * blocks are free etc etc
1021 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1023 #define BTRFS_DEV_EXTENT_KEY 204
1024 #define BTRFS_DEV_ITEM_KEY 216
1025 #define BTRFS_CHUNK_ITEM_KEY 228
1028 * string items are for debugging. They just store a short string of
1031 #define BTRFS_STRING_ITEM_KEY 253
1033 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1034 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1035 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1036 #define BTRFS_MOUNT_SSD (1 << 3)
1037 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1038 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1039 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1040 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1042 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1043 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1044 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1049 #define BTRFS_INODE_NODATASUM (1 << 0)
1050 #define BTRFS_INODE_NODATACOW (1 << 1)
1051 #define BTRFS_INODE_READONLY (1 << 2)
1052 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1053 #define BTRFS_INODE_PREALLOC (1 << 4)
1054 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1055 ~BTRFS_INODE_##flag)
1056 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1058 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1060 /* some macros to generate set/get funcs for the struct fields. This
1061 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1064 #define le8_to_cpu(v) (v)
1065 #define cpu_to_le8(v) (v)
1068 #define read_eb_member(eb, ptr, type, member, result) ( \
1069 read_extent_buffer(eb, (char *)(result), \
1070 ((unsigned long)(ptr)) + \
1071 offsetof(type, member), \
1072 sizeof(((type *)0)->member)))
1074 #define write_eb_member(eb, ptr, type, member, result) ( \
1075 write_extent_buffer(eb, (char *)(result), \
1076 ((unsigned long)(ptr)) + \
1077 offsetof(type, member), \
1078 sizeof(((type *)0)->member)))
1080 #ifndef BTRFS_SETGET_FUNCS
1081 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1082 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1083 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1086 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1087 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1089 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1090 u##bits res = le##bits##_to_cpu(p->member); \
1091 kunmap_atomic(p, KM_USER0); \
1094 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1097 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1098 p->member = cpu_to_le##bits(val); \
1099 kunmap_atomic(p, KM_USER0); \
1102 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1103 static inline u##bits btrfs_##name(type *s) \
1105 return le##bits##_to_cpu(s->member); \
1107 static inline void btrfs_set_##name(type *s, u##bits val) \
1109 s->member = cpu_to_le##bits(val); \
1112 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1113 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1114 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1115 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1116 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1117 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1119 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1120 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1121 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1122 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1123 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1124 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1126 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1127 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1129 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1131 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1133 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1135 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1137 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1138 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1140 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1142 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1144 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1147 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1149 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1152 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1154 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1157 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1158 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1159 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1160 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1161 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1162 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1163 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1164 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1165 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1166 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1167 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1169 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1171 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1174 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1175 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1176 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1178 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1180 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1182 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1184 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1185 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1187 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1189 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1190 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1192 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1195 unsigned long offset = (unsigned long)c;
1196 offset += offsetof(struct btrfs_chunk, stripe);
1197 offset += nr * sizeof(struct btrfs_stripe);
1198 return (struct btrfs_stripe *)offset;
1201 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1203 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1206 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1207 struct btrfs_chunk *c, int nr)
1209 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1212 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1213 struct btrfs_chunk *c, int nr,
1216 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1219 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1220 struct btrfs_chunk *c, int nr)
1222 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1225 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1226 struct btrfs_chunk *c, int nr,
1229 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1232 /* struct btrfs_block_group_item */
1233 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1235 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1237 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1238 struct btrfs_block_group_item, chunk_objectid, 64);
1240 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1241 struct btrfs_block_group_item, chunk_objectid, 64);
1242 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1243 struct btrfs_block_group_item, flags, 64);
1244 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1245 struct btrfs_block_group_item, flags, 64);
1247 /* struct btrfs_inode_ref */
1248 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1249 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1251 /* struct btrfs_inode_item */
1252 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1253 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1254 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1255 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1256 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1257 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1258 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1259 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1260 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1261 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1262 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1263 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1265 static inline struct btrfs_timespec *
1266 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1268 unsigned long ptr = (unsigned long)inode_item;
1269 ptr += offsetof(struct btrfs_inode_item, atime);
1270 return (struct btrfs_timespec *)ptr;
1273 static inline struct btrfs_timespec *
1274 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1276 unsigned long ptr = (unsigned long)inode_item;
1277 ptr += offsetof(struct btrfs_inode_item, mtime);
1278 return (struct btrfs_timespec *)ptr;
1281 static inline struct btrfs_timespec *
1282 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1284 unsigned long ptr = (unsigned long)inode_item;
1285 ptr += offsetof(struct btrfs_inode_item, ctime);
1286 return (struct btrfs_timespec *)ptr;
1289 static inline struct btrfs_timespec *
1290 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1292 unsigned long ptr = (unsigned long)inode_item;
1293 ptr += offsetof(struct btrfs_inode_item, otime);
1294 return (struct btrfs_timespec *)ptr;
1297 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1298 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1300 /* struct btrfs_dev_extent */
1301 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1303 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1304 chunk_objectid, 64);
1305 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1307 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1309 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1311 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1312 return (u8 *)((unsigned long)dev + ptr);
1315 /* struct btrfs_extent_ref */
1316 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1317 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1318 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1319 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1321 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1322 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1324 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1326 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1329 /* struct btrfs_extent_item */
1330 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1331 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1334 /* struct btrfs_node */
1335 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1336 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1338 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1341 ptr = offsetof(struct btrfs_node, ptrs) +
1342 sizeof(struct btrfs_key_ptr) * nr;
1343 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1346 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1350 ptr = offsetof(struct btrfs_node, ptrs) +
1351 sizeof(struct btrfs_key_ptr) * nr;
1352 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1355 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1358 ptr = offsetof(struct btrfs_node, ptrs) +
1359 sizeof(struct btrfs_key_ptr) * nr;
1360 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1363 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1367 ptr = offsetof(struct btrfs_node, ptrs) +
1368 sizeof(struct btrfs_key_ptr) * nr;
1369 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1372 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1374 return offsetof(struct btrfs_node, ptrs) +
1375 sizeof(struct btrfs_key_ptr) * nr;
1378 void btrfs_node_key(struct extent_buffer *eb,
1379 struct btrfs_disk_key *disk_key, int nr);
1381 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1382 struct btrfs_disk_key *disk_key, int nr)
1385 ptr = btrfs_node_key_ptr_offset(nr);
1386 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1387 struct btrfs_key_ptr, key, disk_key);
1390 /* struct btrfs_item */
1391 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1392 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1394 static inline unsigned long btrfs_item_nr_offset(int nr)
1396 return offsetof(struct btrfs_leaf, items) +
1397 sizeof(struct btrfs_item) * nr;
1400 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1403 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1406 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1407 struct btrfs_item *item)
1409 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1412 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1414 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1417 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1419 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1422 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1424 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1427 static inline void btrfs_item_key(struct extent_buffer *eb,
1428 struct btrfs_disk_key *disk_key, int nr)
1430 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1431 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1434 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1435 struct btrfs_disk_key *disk_key, int nr)
1437 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1438 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1441 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1444 * struct btrfs_root_ref
1446 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1447 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1448 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1450 /* struct btrfs_dir_item */
1451 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1452 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1453 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1454 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1456 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1457 struct btrfs_dir_item *item,
1458 struct btrfs_disk_key *key)
1460 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1463 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1464 struct btrfs_dir_item *item,
1465 struct btrfs_disk_key *key)
1467 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1470 /* struct btrfs_disk_key */
1471 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1473 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1474 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1476 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1477 struct btrfs_disk_key *disk)
1479 cpu->offset = le64_to_cpu(disk->offset);
1480 cpu->type = disk->type;
1481 cpu->objectid = le64_to_cpu(disk->objectid);
1484 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1485 struct btrfs_key *cpu)
1487 disk->offset = cpu_to_le64(cpu->offset);
1488 disk->type = cpu->type;
1489 disk->objectid = cpu_to_le64(cpu->objectid);
1492 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1493 struct btrfs_key *key, int nr)
1495 struct btrfs_disk_key disk_key;
1496 btrfs_node_key(eb, &disk_key, nr);
1497 btrfs_disk_key_to_cpu(key, &disk_key);
1500 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1501 struct btrfs_key *key, int nr)
1503 struct btrfs_disk_key disk_key;
1504 btrfs_item_key(eb, &disk_key, nr);
1505 btrfs_disk_key_to_cpu(key, &disk_key);
1508 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1509 struct btrfs_dir_item *item,
1510 struct btrfs_key *key)
1512 struct btrfs_disk_key disk_key;
1513 btrfs_dir_item_key(eb, item, &disk_key);
1514 btrfs_disk_key_to_cpu(key, &disk_key);
1518 static inline u8 btrfs_key_type(struct btrfs_key *key)
1523 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1528 /* struct btrfs_header */
1529 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1530 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1532 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1533 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1534 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1535 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1537 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1539 return (btrfs_header_flags(eb) & flag) == flag;
1542 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1544 u64 flags = btrfs_header_flags(eb);
1545 btrfs_set_header_flags(eb, flags | flag);
1546 return (flags & flag) == flag;
1549 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1551 u64 flags = btrfs_header_flags(eb);
1552 btrfs_set_header_flags(eb, flags & ~flag);
1553 return (flags & flag) == flag;
1556 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1558 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1562 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1564 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1568 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1570 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1574 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1576 unsigned long ptr = offsetof(struct btrfs_header, csum);
1580 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1585 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1590 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1595 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1597 return btrfs_header_level(eb) == 0;
1600 /* struct btrfs_root_item */
1601 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1603 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1604 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1605 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1607 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1609 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1610 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1611 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1612 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1613 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1614 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1615 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1616 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1619 /* struct btrfs_super_block */
1621 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1622 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1623 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1625 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1626 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1627 struct btrfs_super_block, sys_chunk_array_size, 32);
1628 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1629 struct btrfs_super_block, chunk_root_generation, 64);
1630 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1632 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1634 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1635 chunk_root_level, 8);
1636 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1638 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1639 log_root_transid, 64);
1640 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1642 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1644 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1646 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1648 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1650 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1652 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1654 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1655 root_dir_objectid, 64);
1656 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1658 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1660 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1662 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1663 incompat_flags, 64);
1664 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1667 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1669 int t = btrfs_super_csum_type(s);
1670 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1671 return btrfs_csum_sizes[t];
1674 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1676 return offsetof(struct btrfs_leaf, items);
1679 /* struct btrfs_file_extent_item */
1680 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1682 static inline unsigned long
1683 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1685 unsigned long offset = (unsigned long)e;
1686 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1690 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1692 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1695 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1697 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1699 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1700 disk_num_bytes, 64);
1701 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1703 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1705 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1707 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1709 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1711 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1712 other_encoding, 16);
1714 /* this returns the number of file bytes represented by the inline item.
1715 * If an item is compressed, this is the uncompressed size
1717 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1718 struct btrfs_file_extent_item *e)
1720 return btrfs_file_extent_ram_bytes(eb, e);
1724 * this returns the number of bytes used by the item on disk, minus the
1725 * size of any extent headers. If a file is compressed on disk, this is
1726 * the compressed size
1728 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1729 struct btrfs_item *e)
1731 unsigned long offset;
1732 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1733 return btrfs_item_size(eb, e) - offset;
1736 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1738 return sb->s_fs_info;
1741 static inline int btrfs_set_root_name(struct btrfs_root *root,
1742 const char *name, int len)
1744 /* if we already have a name just free it */
1747 root->name = kmalloc(len+1, GFP_KERNEL);
1751 memcpy(root->name, name, len);
1752 root->name[len] = '\0';
1757 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1760 return root->leafsize;
1761 return root->nodesize;
1764 /* helper function to cast into the data area of the leaf. */
1765 #define btrfs_item_ptr(leaf, slot, type) \
1766 ((type *)(btrfs_leaf_data(leaf) + \
1767 btrfs_item_offset_nr(leaf, slot)))
1769 #define btrfs_item_ptr_offset(leaf, slot) \
1770 ((unsigned long)(btrfs_leaf_data(leaf) + \
1771 btrfs_item_offset_nr(leaf, slot)))
1773 static inline struct dentry *fdentry(struct file *file)
1775 return file->f_path.dentry;
1779 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
1780 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1781 struct btrfs_root *root, unsigned long count);
1782 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1783 int btrfs_update_pinned_extents(struct btrfs_root *root,
1784 u64 bytenr, u64 num, int pin);
1785 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root, struct extent_buffer *leaf);
1787 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1788 struct btrfs_root *root, u64 objectid, u64 bytenr);
1789 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1790 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1791 struct btrfs_fs_info *info,
1793 u64 btrfs_find_block_group(struct btrfs_root *root,
1794 u64 search_start, u64 search_hint, int owner);
1795 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1796 struct btrfs_root *root,
1797 u32 blocksize, u64 parent,
1803 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1804 struct btrfs_root *root,
1805 u64 bytenr, u32 blocksize,
1807 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1808 struct btrfs_root *root,
1809 u64 num_bytes, u64 parent, u64 min_bytes,
1810 u64 root_objectid, u64 ref_generation,
1811 u64 owner, u64 empty_size, u64 hint_byte,
1812 u64 search_end, struct btrfs_key *ins, u64 data);
1813 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1814 struct btrfs_root *root, u64 parent,
1815 u64 root_objectid, u64 ref_generation,
1816 u64 owner, struct btrfs_key *ins);
1817 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1818 struct btrfs_root *root, u64 parent,
1819 u64 root_objectid, u64 ref_generation,
1820 u64 owner, struct btrfs_key *ins);
1821 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1822 struct btrfs_root *root,
1823 u64 num_bytes, u64 min_alloc_size,
1824 u64 empty_size, u64 hint_byte,
1825 u64 search_end, struct btrfs_key *ins,
1827 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1828 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1830 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1831 struct extent_buffer *buf, u32 nr_extents);
1832 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1833 struct btrfs_root *root, struct extent_buffer *orig_buf,
1834 struct extent_buffer *buf, int start_slot, int nr);
1835 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1836 struct btrfs_root *root,
1837 u64 bytenr, u64 num_bytes, u64 parent,
1838 u64 root_objectid, u64 ref_generation,
1839 u64 owner_objectid, int pin);
1840 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1841 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root,
1843 struct extent_io_tree *unpin);
1844 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1845 struct btrfs_root *root,
1846 u64 bytenr, u64 num_bytes, u64 parent,
1847 u64 root_objectid, u64 ref_generation,
1848 u64 owner_objectid);
1849 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root, u64 bytenr, u64 num_bytes,
1851 u64 orig_parent, u64 parent,
1852 u64 root_objectid, u64 ref_generation,
1853 u64 owner_objectid);
1854 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root);
1856 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1857 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1858 int btrfs_read_block_groups(struct btrfs_root *root);
1859 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1860 struct btrfs_root *root, u64 bytes_used,
1861 u64 type, u64 chunk_objectid, u64 chunk_offset,
1863 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1864 struct btrfs_root *root, u64 group_start);
1865 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1866 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1867 struct btrfs_root *root);
1868 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1869 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1870 struct btrfs_root *root,
1871 struct extent_buffer *buf, u64 orig_start);
1872 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1873 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1874 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1875 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1876 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1877 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1879 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1880 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1882 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1883 struct inode *inode, u64 bytes);
1884 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1886 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1889 int btrfs_previous_item(struct btrfs_root *root,
1890 struct btrfs_path *path, u64 min_objectid,
1892 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1893 struct btrfs_root *root,
1894 struct btrfs_key *node_keys,
1895 u64 *nodes, int lowest_level);
1896 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1897 struct btrfs_root *root, struct btrfs_path *path,
1898 struct btrfs_key *new_key);
1899 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1900 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1901 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1902 struct btrfs_key *key, int lowest_level,
1903 int cache_only, u64 min_trans);
1904 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1905 struct btrfs_key *max_key,
1906 struct btrfs_path *path, int cache_only,
1908 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1909 struct btrfs_root *root, struct extent_buffer *buf,
1910 struct extent_buffer *parent, int parent_slot,
1911 struct extent_buffer **cow_ret);
1912 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1913 struct btrfs_root *root,
1914 struct extent_buffer *buf,
1915 struct extent_buffer **cow_ret, u64 new_root_objectid);
1916 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1917 *root, struct btrfs_path *path, u32 data_size);
1918 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1919 struct btrfs_root *root,
1920 struct btrfs_path *path,
1921 u32 new_size, int from_end);
1922 int btrfs_split_item(struct btrfs_trans_handle *trans,
1923 struct btrfs_root *root,
1924 struct btrfs_path *path,
1925 struct btrfs_key *new_key,
1926 unsigned long split_offset);
1927 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1928 *root, struct btrfs_key *key, struct btrfs_path *p, int
1930 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1931 struct btrfs_root *root, struct extent_buffer *parent,
1932 int start_slot, int cache_only, u64 *last_ret,
1933 struct btrfs_key *progress);
1934 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1935 struct btrfs_path *btrfs_alloc_path(void);
1936 void btrfs_free_path(struct btrfs_path *p);
1937 void btrfs_set_path_blocking(struct btrfs_path *p);
1938 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
1940 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1941 struct btrfs_path *path, int slot, int nr);
1942 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1943 struct btrfs_root *root,
1944 struct btrfs_path *path, u64 bytenr);
1945 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1946 struct btrfs_root *root,
1947 struct btrfs_path *path)
1949 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1952 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1953 *root, struct btrfs_key *key, void *data, u32 data_size);
1954 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1955 struct btrfs_root *root,
1956 struct btrfs_path *path,
1957 struct btrfs_key *cpu_key, u32 *data_size,
1959 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1960 struct btrfs_root *root,
1961 struct btrfs_path *path,
1962 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1964 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root,
1966 struct btrfs_path *path,
1967 struct btrfs_key *key,
1970 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1973 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1974 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1975 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1976 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1978 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1979 struct btrfs_root *root,
1980 struct extent_buffer *node,
1981 struct extent_buffer *parent);
1983 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1984 struct btrfs_path *path,
1985 u64 root_id, u64 ref_id);
1986 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1987 struct btrfs_root *tree_root,
1988 u64 root_id, u8 type, u64 ref_id,
1989 u64 dirid, u64 sequence,
1990 const char *name, int name_len);
1991 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1992 struct btrfs_key *key);
1993 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1994 *root, struct btrfs_key *key, struct btrfs_root_item
1996 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1997 *root, struct btrfs_key *key, struct btrfs_root_item
1999 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2000 btrfs_root_item *item, struct btrfs_key *key);
2001 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2002 u64 *found_objectid);
2003 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
2004 struct btrfs_root *latest_root);
2006 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2007 struct btrfs_root *root, const char *name,
2008 int name_len, u64 dir,
2009 struct btrfs_key *location, u8 type, u64 index);
2010 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2011 struct btrfs_root *root,
2012 struct btrfs_path *path, u64 dir,
2013 const char *name, int name_len,
2015 struct btrfs_dir_item *
2016 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2017 struct btrfs_root *root,
2018 struct btrfs_path *path, u64 dir,
2019 u64 objectid, const char *name, int name_len,
2021 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2022 struct btrfs_path *path,
2023 const char *name, int name_len);
2024 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2025 struct btrfs_root *root,
2026 struct btrfs_path *path,
2027 struct btrfs_dir_item *di);
2028 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *root, const char *name,
2030 u16 name_len, const void *data, u16 data_len,
2032 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2033 struct btrfs_root *root,
2034 struct btrfs_path *path, u64 dir,
2035 const char *name, u16 name_len,
2039 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2040 struct btrfs_root *root, u64 offset);
2041 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2042 struct btrfs_root *root, u64 offset);
2045 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2046 struct btrfs_root *fs_root,
2047 u64 dirid, u64 *objectid);
2048 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2051 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2052 struct btrfs_root *root,
2053 const char *name, int name_len,
2054 u64 inode_objectid, u64 ref_objectid, u64 index);
2055 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2056 struct btrfs_root *root,
2057 const char *name, int name_len,
2058 u64 inode_objectid, u64 ref_objectid, u64 *index);
2059 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2060 struct btrfs_root *root,
2061 struct btrfs_path *path, u64 objectid);
2062 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2063 *root, struct btrfs_path *path,
2064 struct btrfs_key *location, int mod);
2067 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2068 struct btrfs_root *root, u64 bytenr, u64 len);
2069 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2070 struct bio *bio, u32 *dst);
2071 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2072 struct btrfs_root *root,
2073 u64 objectid, u64 pos,
2074 u64 disk_offset, u64 disk_num_bytes,
2075 u64 num_bytes, u64 offset, u64 ram_bytes,
2076 u8 compression, u8 encryption, u16 other_encoding);
2077 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2078 struct btrfs_root *root,
2079 struct btrfs_path *path, u64 objectid,
2080 u64 bytenr, int mod);
2081 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2082 struct btrfs_root *root,
2083 struct btrfs_ordered_sum *sums);
2084 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2085 struct bio *bio, u64 file_start, int contig);
2086 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2087 u64 start, unsigned long len);
2088 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2089 struct btrfs_root *root,
2090 struct btrfs_path *path,
2091 u64 bytenr, int cow);
2092 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root, struct btrfs_path *path,
2095 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2096 u64 end, struct list_head *list);
2099 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2100 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2101 #define ClearPageChecked ClearPageFsMisc
2102 #define SetPageChecked SetPageFsMisc
2103 #define PageChecked PageFsMisc
2106 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2107 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2108 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2109 struct btrfs_root *root,
2110 struct inode *dir, struct inode *inode,
2111 const char *name, int name_len);
2112 int btrfs_add_link(struct btrfs_trans_handle *trans,
2113 struct inode *parent_inode, struct inode *inode,
2114 const char *name, int name_len, int add_backref, u64 index);
2115 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2116 struct btrfs_root *root,
2117 struct inode *inode, u64 new_size,
2120 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2121 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2122 int btrfs_writepages(struct address_space *mapping,
2123 struct writeback_control *wbc);
2124 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2125 struct btrfs_root *new_root, struct dentry *dentry,
2126 u64 new_dirid, u64 alloc_hint);
2127 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2128 size_t size, struct bio *bio, unsigned long bio_flags);
2130 unsigned long btrfs_force_ra(struct address_space *mapping,
2131 struct file_ra_state *ra, struct file *file,
2132 pgoff_t offset, pgoff_t last_index);
2133 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2134 int btrfs_readpage(struct file *file, struct page *page);
2135 void btrfs_delete_inode(struct inode *inode);
2136 void btrfs_put_inode(struct inode *inode);
2137 void btrfs_read_locked_inode(struct inode *inode);
2138 int btrfs_write_inode(struct inode *inode, int wait);
2139 void btrfs_dirty_inode(struct inode *inode);
2140 struct inode *btrfs_alloc_inode(struct super_block *sb);
2141 void btrfs_destroy_inode(struct inode *inode);
2142 int btrfs_init_cachep(void);
2143 void btrfs_destroy_cachep(void);
2144 long btrfs_ioctl_trans_end(struct file *file);
2145 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2146 struct btrfs_root *root, int wait);
2147 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2148 struct btrfs_root *root);
2149 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2150 struct btrfs_root *root, int *is_new);
2151 int btrfs_commit_write(struct file *file, struct page *page,
2152 unsigned from, unsigned to);
2153 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2154 size_t page_offset, u64 start, u64 end,
2156 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2157 struct btrfs_root *root,
2158 struct inode *inode);
2159 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2160 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2161 void btrfs_orphan_cleanup(struct btrfs_root *root);
2162 int btrfs_cont_expand(struct inode *inode, loff_t size);
2165 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2168 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2169 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2171 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2172 extern struct file_operations btrfs_file_operations;
2173 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root, struct inode *inode,
2175 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2176 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2177 struct btrfs_root *root,
2178 struct inode *inode, u64 start, u64 end);
2179 int btrfs_release_file(struct inode *inode, struct file *file);
2182 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2183 struct btrfs_root *root, int cache_only);
2186 int btrfs_init_sysfs(void);
2187 void btrfs_exit_sysfs(void);
2188 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2189 int btrfs_sysfs_add_root(struct btrfs_root *root);
2190 void btrfs_sysfs_del_root(struct btrfs_root *root);
2191 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2194 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2197 u64 btrfs_parse_size(char *str);
2198 int btrfs_parse_options(struct btrfs_root *root, char *options);
2199 int btrfs_sync_fs(struct super_block *sb, int wait);
2202 int btrfs_check_acl(struct inode *inode, int mask);
2203 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2204 int btrfs_acl_chmod(struct inode *inode);