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
48 #define BTRFS_COMPAT_EXTENT_TREE_V0
51 * files bigger than this get some pre-flushing when they are added
52 * to the ordered operations list. That way we limit the total
53 * work done by the commit
55 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
57 /* holds pointers to all of the tree roots */
58 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
60 /* stores information about which extents are in use, and reference counts */
61 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
67 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
73 #define BTRFS_DEV_TREE_OBJECTID 4ULL
75 /* one per subvolume, storing files and directories */
76 #define BTRFS_FS_TREE_OBJECTID 5ULL
78 /* directory objectid inside the root tree */
79 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
81 /* holds checksums of all the data extents */
82 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
84 /* orhpan objectid for tracking unlinked/truncated files */
85 #define BTRFS_ORPHAN_OBJECTID -5ULL
87 /* does write ahead logging to speed up fsyncs */
88 #define BTRFS_TREE_LOG_OBJECTID -6ULL
89 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
91 /* for space balancing */
92 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
93 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
96 * extent checksums all have this objectid
97 * this allows them to share the logging tree
100 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
102 /* dummy objectid represents multiple objectids */
103 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
106 * All files have objectids in this range.
108 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
109 #define BTRFS_LAST_FREE_OBJECTID -256ULL
110 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
114 * the device items go into the chunk tree. The key is in the form
115 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
117 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
120 * we can actually store much bigger names, but lets not confuse the rest
123 #define BTRFS_NAME_LEN 255
125 /* 32 bytes in various csum fields */
126 #define BTRFS_CSUM_SIZE 32
129 #define BTRFS_CSUM_TYPE_CRC32 0
131 static int btrfs_csum_sizes[] = { 4, 0 };
133 /* four bytes for CRC32 */
134 #define BTRFS_EMPTY_DIR_SIZE 0
136 #define BTRFS_FT_UNKNOWN 0
137 #define BTRFS_FT_REG_FILE 1
138 #define BTRFS_FT_DIR 2
139 #define BTRFS_FT_CHRDEV 3
140 #define BTRFS_FT_BLKDEV 4
141 #define BTRFS_FT_FIFO 5
142 #define BTRFS_FT_SOCK 6
143 #define BTRFS_FT_SYMLINK 7
144 #define BTRFS_FT_XATTR 8
145 #define BTRFS_FT_MAX 9
148 * The key defines the order in the tree, and so it also defines (optimal)
151 * objectid corresponds to the inode number.
153 * type tells us things about the object, and is a kind of stream selector.
154 * so for a given inode, keys with type of 1 might refer to the inode data,
155 * type of 2 may point to file data in the btree and type == 3 may point to
158 * offset is the starting byte offset for this key in the stream.
160 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
161 * in cpu native order. Otherwise they are identical and their sizes
162 * should be the same (ie both packed)
164 struct btrfs_disk_key {
168 } __attribute__ ((__packed__));
174 } __attribute__ ((__packed__));
176 struct btrfs_mapping_tree {
177 struct extent_map_tree map_tree;
180 #define BTRFS_UUID_SIZE 16
181 struct btrfs_dev_item {
182 /* the internal btrfs device id */
185 /* size of the device */
191 /* optimal io alignment for this device */
194 /* optimal io width for this device */
197 /* minimal io size for this device */
200 /* type and info about this device */
203 /* expected generation for this device */
207 * starting byte of this partition on the device,
208 * to allow for stripe alignment in the future
212 /* grouping information for allocation decisions */
215 /* seek speed 0-100 where 100 is fastest */
218 /* bandwidth 0-100 where 100 is fastest */
221 /* btrfs generated uuid for this device */
222 u8 uuid[BTRFS_UUID_SIZE];
224 /* uuid of FS who owns this device */
225 u8 fsid[BTRFS_UUID_SIZE];
226 } __attribute__ ((__packed__));
228 struct btrfs_stripe {
231 u8 dev_uuid[BTRFS_UUID_SIZE];
232 } __attribute__ ((__packed__));
235 /* size of this chunk in bytes */
238 /* objectid of the root referencing this chunk */
244 /* optimal io alignment for this chunk */
247 /* optimal io width for this chunk */
250 /* minimal io size for this chunk */
253 /* 2^16 stripes is quite a lot, a second limit is the size of a single
258 /* sub stripes only matter for raid10 */
260 struct btrfs_stripe stripe;
261 /* additional stripes go here */
262 } __attribute__ ((__packed__));
264 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
266 BUG_ON(num_stripes == 0);
267 return sizeof(struct btrfs_chunk) +
268 sizeof(struct btrfs_stripe) * (num_stripes - 1);
271 #define BTRFS_FSID_SIZE 16
272 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
273 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
274 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
275 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
277 #define BTRFS_BACKREF_REV_MAX 256
278 #define BTRFS_BACKREF_REV_SHIFT 56
279 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
280 BTRFS_BACKREF_REV_SHIFT)
282 #define BTRFS_OLD_BACKREF_REV 0
283 #define BTRFS_MIXED_BACKREF_REV 1
286 * every tree block (leaf or node) starts with this header.
288 struct btrfs_header {
289 /* these first four must match the super block */
290 u8 csum[BTRFS_CSUM_SIZE];
291 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
292 __le64 bytenr; /* which block this node is supposed to live in */
295 /* allowed to be different from the super from here on down */
296 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
301 } __attribute__ ((__packed__));
303 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
304 sizeof(struct btrfs_header)) / \
305 sizeof(struct btrfs_key_ptr))
306 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
307 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
308 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
309 sizeof(struct btrfs_item) - \
310 sizeof(struct btrfs_file_extent_item))
314 * this is a very generous portion of the super block, giving us
315 * room to translate 14 chunks with 3 stripes each.
317 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
318 #define BTRFS_LABEL_SIZE 256
321 * the super block basically lists the main trees of the FS
322 * it currently lacks any block count etc etc
324 struct btrfs_super_block {
325 u8 csum[BTRFS_CSUM_SIZE];
326 /* the first 4 fields must match struct btrfs_header */
327 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
328 __le64 bytenr; /* this block number */
331 /* allowed to be different from the btrfs_header from here own down */
338 /* this will help find the new super based on the log root */
339 __le64 log_root_transid;
342 __le64 root_dir_objectid;
348 __le32 sys_chunk_array_size;
349 __le64 chunk_root_generation;
351 __le64 compat_ro_flags;
352 __le64 incompat_flags;
357 struct btrfs_dev_item dev_item;
359 char label[BTRFS_LABEL_SIZE];
361 /* future expansion */
363 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
364 } __attribute__ ((__packed__));
367 * Compat flags that we support. If any incompat flags are set other than the
368 * ones specified below then we will fail to mount
370 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
372 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
373 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
374 #define BTRFS_FEATURE_INCOMPAT_SUPP \
375 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
378 * A leaf is full of items. offset and size tell us where to find
379 * the item in the leaf (relative to the start of the data area)
382 struct btrfs_disk_key key;
385 } __attribute__ ((__packed__));
388 * leaves have an item area and a data area:
389 * [item0, item1....itemN] [free space] [dataN...data1, data0]
391 * The data is separate from the items to get the keys closer together
395 struct btrfs_header header;
396 struct btrfs_item items[];
397 } __attribute__ ((__packed__));
400 * all non-leaf blocks are nodes, they hold only keys and pointers to
403 struct btrfs_key_ptr {
404 struct btrfs_disk_key key;
407 } __attribute__ ((__packed__));
410 struct btrfs_header header;
411 struct btrfs_key_ptr ptrs[];
412 } __attribute__ ((__packed__));
415 * btrfs_paths remember the path taken from the root down to the leaf.
416 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
417 * to any other levels that are present.
419 * The slots array records the index of the item or block pointer
420 * used while walking the tree.
423 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
424 int slots[BTRFS_MAX_LEVEL];
425 /* if there is real range locking, this locks field will change */
426 int locks[BTRFS_MAX_LEVEL];
428 /* keep some upper locks as we walk down */
432 * set by btrfs_split_item, tells search_slot to keep all locks
433 * and to force calls to keep space in the nodes
435 unsigned int search_for_split:1;
436 unsigned int keep_locks:1;
437 unsigned int skip_locking:1;
438 unsigned int leave_spinning:1;
439 unsigned int search_commit_root:1;
443 * items in the extent btree are used to record the objectid of the
444 * owner of the block and the number of references
447 struct btrfs_extent_item {
451 } __attribute__ ((__packed__));
453 struct btrfs_extent_item_v0 {
455 } __attribute__ ((__packed__));
457 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
458 sizeof(struct btrfs_item))
460 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
461 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
463 /* following flags only apply to tree blocks */
465 /* use full backrefs for extent pointers in the block */
466 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
468 struct btrfs_tree_block_info {
469 struct btrfs_disk_key key;
471 } __attribute__ ((__packed__));
473 struct btrfs_extent_data_ref {
478 } __attribute__ ((__packed__));
480 struct btrfs_shared_data_ref {
482 } __attribute__ ((__packed__));
484 struct btrfs_extent_inline_ref {
487 } __attribute__ ((__packed__));
489 /* old style backrefs item */
490 struct btrfs_extent_ref_v0 {
495 } __attribute__ ((__packed__));
498 /* dev extents record free space on individual devices. The owner
499 * field points back to the chunk allocation mapping tree that allocated
500 * the extent. The chunk tree uuid field is a way to double check the owner
502 struct btrfs_dev_extent {
504 __le64 chunk_objectid;
507 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
508 } __attribute__ ((__packed__));
510 struct btrfs_inode_ref {
514 } __attribute__ ((__packed__));
516 struct btrfs_timespec {
519 } __attribute__ ((__packed__));
521 enum btrfs_compression_type {
522 BTRFS_COMPRESS_NONE = 0,
523 BTRFS_COMPRESS_ZLIB = 1,
524 BTRFS_COMPRESS_LAST = 2,
527 struct btrfs_inode_item {
528 /* nfs style generation number */
530 /* transid that last touched this inode */
542 /* modification sequence number for NFS */
546 * a little future expansion, for more than this we can
547 * just grow the inode item and version it
550 struct btrfs_timespec atime;
551 struct btrfs_timespec ctime;
552 struct btrfs_timespec mtime;
553 struct btrfs_timespec otime;
554 } __attribute__ ((__packed__));
556 struct btrfs_dir_log_item {
558 } __attribute__ ((__packed__));
560 struct btrfs_dir_item {
561 struct btrfs_disk_key location;
566 } __attribute__ ((__packed__));
568 struct btrfs_root_item {
569 struct btrfs_inode_item inode;
575 __le64 last_snapshot;
578 struct btrfs_disk_key drop_progress;
581 } __attribute__ ((__packed__));
584 * this is used for both forward and backward root refs
586 struct btrfs_root_ref {
590 } __attribute__ ((__packed__));
592 #define BTRFS_FILE_EXTENT_INLINE 0
593 #define BTRFS_FILE_EXTENT_REG 1
594 #define BTRFS_FILE_EXTENT_PREALLOC 2
596 struct btrfs_file_extent_item {
598 * transaction id that created this extent
602 * max number of bytes to hold this extent in ram
603 * when we split a compressed extent we can't know how big
604 * each of the resulting pieces will be. So, this is
605 * an upper limit on the size of the extent in ram instead of
611 * 32 bits for the various ways we might encode the data,
612 * including compression and encryption. If any of these
613 * are set to something a given disk format doesn't understand
614 * it is treated like an incompat flag for reading and writing,
619 __le16 other_encoding; /* spare for later use */
621 /* are we inline data or a real extent? */
625 * disk space consumed by the extent, checksum blocks are included
629 __le64 disk_num_bytes;
631 * the logical offset in file blocks (no csums)
632 * this extent record is for. This allows a file extent to point
633 * into the middle of an existing extent on disk, sharing it
634 * between two snapshots (useful if some bytes in the middle of the
635 * extent have changed
639 * the logical number of file blocks (no csums included). This
640 * always reflects the size uncompressed and without encoding.
644 } __attribute__ ((__packed__));
646 struct btrfs_csum_item {
648 } __attribute__ ((__packed__));
650 /* different types of block groups (and chunks) */
651 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
652 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
653 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
654 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
655 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
656 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
657 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
659 struct btrfs_block_group_item {
661 __le64 chunk_objectid;
663 } __attribute__ ((__packed__));
665 struct btrfs_space_info {
668 u64 total_bytes; /* total bytes in the space */
669 u64 bytes_used; /* total bytes used on disk */
670 u64 bytes_pinned; /* total bytes pinned, will be freed when the
671 transaction finishes */
672 u64 bytes_reserved; /* total bytes the allocator has reserved for
673 current allocations */
674 u64 bytes_readonly; /* total bytes that are read only */
676 /* delalloc accounting */
677 u64 bytes_delalloc; /* number of bytes reserved for allocation,
678 this space is not necessarily reserved yet
680 u64 bytes_may_use; /* number of bytes that may be used for
683 int full; /* indicates that we cannot allocate any more
684 chunks for this space */
685 int force_alloc; /* set if we need to force a chunk alloc for
688 struct list_head list;
690 /* for block groups in our same type */
691 struct list_head block_groups;
693 struct rw_semaphore groups_sem;
697 * free clusters are used to claim free space in relatively large chunks,
698 * allowing us to do less seeky writes. They are used for all metadata
699 * allocations and data allocations in ssd mode.
701 struct btrfs_free_cluster {
703 spinlock_t refill_lock;
706 /* largest extent in this cluster */
709 /* first extent starting offset */
712 struct btrfs_block_group_cache *block_group;
714 * when a cluster is allocated from a block group, we put the
715 * cluster onto a list in the block group so that it can
716 * be freed before the block group is freed.
718 struct list_head block_group_list;
721 struct btrfs_block_group_cache {
722 struct btrfs_key key;
723 struct btrfs_block_group_item item;
725 struct mutex cache_mutex;
733 struct btrfs_space_info *space_info;
735 /* free space cache stuff */
736 spinlock_t tree_lock;
737 struct rb_root free_space_bytes;
738 struct rb_root free_space_offset;
740 /* block group cache stuff */
741 struct rb_node cache_node;
743 /* for block groups in the same raid type */
744 struct list_head list;
749 /* List of struct btrfs_free_clusters for this block group.
750 * Today it will only have one thing on it, but that may change
752 struct list_head cluster_list;
755 struct reloc_control;
757 struct btrfs_fs_devices;
758 struct btrfs_fs_info {
759 u8 fsid[BTRFS_FSID_SIZE];
760 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
761 struct btrfs_root *extent_root;
762 struct btrfs_root *tree_root;
763 struct btrfs_root *chunk_root;
764 struct btrfs_root *dev_root;
765 struct btrfs_root *fs_root;
766 struct btrfs_root *csum_root;
768 /* the log root tree is a directory of all the other log roots */
769 struct btrfs_root *log_root_tree;
770 struct radix_tree_root fs_roots_radix;
772 /* block group cache stuff */
773 spinlock_t block_group_cache_lock;
774 struct rb_root block_group_cache_tree;
776 struct extent_io_tree pinned_extents;
778 /* logical->physical extent mapping */
779 struct btrfs_mapping_tree mapping_tree;
782 u64 last_trans_committed;
785 * this is updated to the current trans every time a full commit
786 * is required instead of the faster short fsync log commits
788 u64 last_trans_log_full_commit;
789 u64 open_ioctl_trans;
790 unsigned long mount_opt;
794 struct btrfs_transaction *running_transaction;
795 wait_queue_head_t transaction_throttle;
796 wait_queue_head_t transaction_wait;
797 wait_queue_head_t async_submit_wait;
799 struct btrfs_super_block super_copy;
800 struct btrfs_super_block super_for_commit;
801 struct block_device *__bdev;
802 struct super_block *sb;
803 struct inode *btree_inode;
804 struct backing_dev_info bdi;
805 struct mutex trans_mutex;
806 struct mutex tree_log_mutex;
807 struct mutex transaction_kthread_mutex;
808 struct mutex cleaner_mutex;
809 struct mutex chunk_mutex;
810 struct mutex drop_mutex;
811 struct mutex volume_mutex;
812 struct mutex tree_reloc_mutex;
815 * this protects the ordered operations list only while we are
816 * processing all of the entries on it. This way we make
817 * sure the commit code doesn't find the list temporarily empty
818 * because another function happens to be doing non-waiting preflush
819 * before jumping into the main commit.
821 struct mutex ordered_operations_mutex;
823 struct list_head trans_list;
824 struct list_head hashers;
825 struct list_head dead_roots;
827 atomic_t nr_async_submits;
828 atomic_t async_submit_draining;
829 atomic_t nr_async_bios;
830 atomic_t async_delalloc_pages;
833 * this is used by the balancing code to wait for all the pending
836 spinlock_t ordered_extent_lock;
839 * all of the data=ordered extents pending writeback
840 * these can span multiple transactions and basically include
841 * every dirty data page that isn't from nodatacow
843 struct list_head ordered_extents;
846 * all of the inodes that have delalloc bytes. It is possible for
847 * this list to be empty even when there is still dirty data=ordered
848 * extents waiting to finish IO.
850 struct list_head delalloc_inodes;
853 * special rename and truncate targets that must be on disk before
854 * we're allowed to commit. This is basically the ext3 style
857 struct list_head ordered_operations;
860 * there is a pool of worker threads for checksumming during writes
861 * and a pool for checksumming after reads. This is because readers
862 * can run with FS locks held, and the writers may be waiting for
863 * those locks. We don't want ordering in the pending list to cause
864 * deadlocks, and so the two are serviced separately.
866 * A third pool does submit_bio to avoid deadlocking with the other
869 struct btrfs_workers workers;
870 struct btrfs_workers delalloc_workers;
871 struct btrfs_workers endio_workers;
872 struct btrfs_workers endio_meta_workers;
873 struct btrfs_workers endio_meta_write_workers;
874 struct btrfs_workers endio_write_workers;
875 struct btrfs_workers submit_workers;
877 * fixup workers take dirty pages that didn't properly go through
878 * the cow mechanism and make them safe to write. It happens
879 * for the sys_munmap function call path
881 struct btrfs_workers fixup_workers;
882 struct task_struct *transaction_kthread;
883 struct task_struct *cleaner_kthread;
884 int thread_pool_size;
886 struct kobject super_kobj;
887 struct completion kobj_unregister;
890 int log_root_recovering;
894 /* protected by the delalloc lock, used to keep from writing
895 * metadata until there is a nice batch
897 u64 dirty_metadata_bytes;
898 struct list_head dirty_cowonly_roots;
900 struct btrfs_fs_devices *fs_devices;
903 * the space_info list is almost entirely read only. It only changes
904 * when we add a new raid type to the FS, and that happens
905 * very rarely. RCU is used to protect it.
907 struct list_head space_info;
909 struct reloc_control *reloc_ctl;
911 spinlock_t delalloc_lock;
912 spinlock_t new_trans_lock;
915 /* data_alloc_cluster is only used in ssd mode */
916 struct btrfs_free_cluster data_alloc_cluster;
918 /* all metadata allocations go through this cluster */
919 struct btrfs_free_cluster meta_alloc_cluster;
921 spinlock_t ref_cache_lock;
922 u64 total_ref_cache_size;
924 u64 avail_data_alloc_bits;
925 u64 avail_metadata_alloc_bits;
926 u64 avail_system_alloc_bits;
927 u64 data_alloc_profile;
928 u64 metadata_alloc_profile;
929 u64 system_alloc_profile;
931 unsigned data_chunk_allocations;
932 unsigned metadata_ratio;
938 * in ram representation of the tree. extent_root is used for all allocations
939 * and for the extent tree extent_root root.
942 struct extent_buffer *node;
944 /* the node lock is held while changing the node pointer */
945 spinlock_t node_lock;
947 struct extent_buffer *commit_root;
948 struct btrfs_root *log_root;
949 struct btrfs_root *reloc_root;
951 struct btrfs_root_item root_item;
952 struct btrfs_key root_key;
953 struct btrfs_fs_info *fs_info;
954 struct extent_io_tree dirty_log_pages;
956 struct kobject root_kobj;
957 struct completion kobj_unregister;
958 struct mutex objectid_mutex;
960 struct mutex log_mutex;
961 wait_queue_head_t log_writer_wait;
962 wait_queue_head_t log_commit_wait[2];
963 atomic_t log_writers;
964 atomic_t log_commit[2];
965 unsigned long log_transid;
966 unsigned long log_batch;
971 /* data allocations are done in sectorsize units */
974 /* node allocations are done in nodesize units */
977 /* leaf allocations are done in leafsize units */
984 u64 last_inode_alloc;
987 u64 defrag_trans_start;
988 struct btrfs_key defrag_progress;
989 struct btrfs_key defrag_max;
995 /* the dirty list is only used by non-reference counted roots */
996 struct list_head dirty_list;
998 struct list_head root_list;
1000 spinlock_t list_lock;
1001 struct list_head orphan_list;
1003 spinlock_t inode_lock;
1004 /* red-black tree that keeps track of in-memory inodes */
1005 struct rb_root inode_tree;
1008 * right now this just gets used so that a root has its own devid
1009 * for stat. It may be used for more later
1011 struct super_block anon_super;
1015 * inode items have the data typically returned from stat and store other
1016 * info about object characteristics. There is one for every file and dir in
1019 #define BTRFS_INODE_ITEM_KEY 1
1020 #define BTRFS_INODE_REF_KEY 12
1021 #define BTRFS_XATTR_ITEM_KEY 24
1022 #define BTRFS_ORPHAN_ITEM_KEY 48
1023 /* reserve 2-15 close to the inode for later flexibility */
1026 * dir items are the name -> inode pointers in a directory. There is one
1027 * for every name in a directory.
1029 #define BTRFS_DIR_LOG_ITEM_KEY 60
1030 #define BTRFS_DIR_LOG_INDEX_KEY 72
1031 #define BTRFS_DIR_ITEM_KEY 84
1032 #define BTRFS_DIR_INDEX_KEY 96
1034 * extent data is for file data
1036 #define BTRFS_EXTENT_DATA_KEY 108
1039 * extent csums are stored in a separate tree and hold csums for
1040 * an entire extent on disk.
1042 #define BTRFS_EXTENT_CSUM_KEY 128
1045 * root items point to tree roots. They are typically in the root
1046 * tree used by the super block to find all the other trees
1048 #define BTRFS_ROOT_ITEM_KEY 132
1051 * root backrefs tie subvols and snapshots to the directory entries that
1054 #define BTRFS_ROOT_BACKREF_KEY 144
1057 * root refs make a fast index for listing all of the snapshots and
1058 * subvolumes referenced by a given root. They point directly to the
1059 * directory item in the root that references the subvol
1061 #define BTRFS_ROOT_REF_KEY 156
1064 * extent items are in the extent map tree. These record which blocks
1065 * are used, and how many references there are to each block
1067 #define BTRFS_EXTENT_ITEM_KEY 168
1069 #define BTRFS_TREE_BLOCK_REF_KEY 176
1071 #define BTRFS_EXTENT_DATA_REF_KEY 178
1073 #define BTRFS_EXTENT_REF_V0_KEY 180
1075 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1077 #define BTRFS_SHARED_DATA_REF_KEY 184
1080 * block groups give us hints into the extent allocation trees. Which
1081 * blocks are free etc etc
1083 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1085 #define BTRFS_DEV_EXTENT_KEY 204
1086 #define BTRFS_DEV_ITEM_KEY 216
1087 #define BTRFS_CHUNK_ITEM_KEY 228
1090 * string items are for debugging. They just store a short string of
1093 #define BTRFS_STRING_ITEM_KEY 253
1095 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1096 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1097 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1098 #define BTRFS_MOUNT_SSD (1 << 3)
1099 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1100 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1101 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1102 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1103 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1105 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1106 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1107 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1112 #define BTRFS_INODE_NODATASUM (1 << 0)
1113 #define BTRFS_INODE_NODATACOW (1 << 1)
1114 #define BTRFS_INODE_READONLY (1 << 2)
1115 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1116 #define BTRFS_INODE_PREALLOC (1 << 4)
1117 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1118 ~BTRFS_INODE_##flag)
1119 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1121 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1123 /* some macros to generate set/get funcs for the struct fields. This
1124 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1127 #define le8_to_cpu(v) (v)
1128 #define cpu_to_le8(v) (v)
1131 #define read_eb_member(eb, ptr, type, member, result) ( \
1132 read_extent_buffer(eb, (char *)(result), \
1133 ((unsigned long)(ptr)) + \
1134 offsetof(type, member), \
1135 sizeof(((type *)0)->member)))
1137 #define write_eb_member(eb, ptr, type, member, result) ( \
1138 write_extent_buffer(eb, (char *)(result), \
1139 ((unsigned long)(ptr)) + \
1140 offsetof(type, member), \
1141 sizeof(((type *)0)->member)))
1143 #ifndef BTRFS_SETGET_FUNCS
1144 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1145 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1146 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1149 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1150 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1152 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1153 u##bits res = le##bits##_to_cpu(p->member); \
1154 kunmap_atomic(p, KM_USER0); \
1157 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1160 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1161 p->member = cpu_to_le##bits(val); \
1162 kunmap_atomic(p, KM_USER0); \
1165 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1166 static inline u##bits btrfs_##name(type *s) \
1168 return le##bits##_to_cpu(s->member); \
1170 static inline void btrfs_set_##name(type *s, u##bits val) \
1172 s->member = cpu_to_le##bits(val); \
1175 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1176 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1177 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1178 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1179 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1180 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1182 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1183 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1184 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1185 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1186 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1187 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1189 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1190 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1192 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1194 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1196 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1198 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1200 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1201 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1203 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1205 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1207 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1210 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1212 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1215 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1217 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1220 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1221 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1222 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1223 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1224 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1225 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1226 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1227 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1228 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1229 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1230 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1232 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1234 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1237 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1238 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1239 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1241 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1243 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1245 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1247 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1248 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1250 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1252 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1253 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1255 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1258 unsigned long offset = (unsigned long)c;
1259 offset += offsetof(struct btrfs_chunk, stripe);
1260 offset += nr * sizeof(struct btrfs_stripe);
1261 return (struct btrfs_stripe *)offset;
1264 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1266 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1269 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1270 struct btrfs_chunk *c, int nr)
1272 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1275 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1276 struct btrfs_chunk *c, int nr,
1279 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1282 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1283 struct btrfs_chunk *c, int nr)
1285 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1288 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1289 struct btrfs_chunk *c, int nr,
1292 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1295 /* struct btrfs_block_group_item */
1296 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1298 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1300 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1301 struct btrfs_block_group_item, chunk_objectid, 64);
1303 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1304 struct btrfs_block_group_item, chunk_objectid, 64);
1305 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1306 struct btrfs_block_group_item, flags, 64);
1307 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1308 struct btrfs_block_group_item, flags, 64);
1310 /* struct btrfs_inode_ref */
1311 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1312 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1314 /* struct btrfs_inode_item */
1315 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1316 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1317 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1318 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1319 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1320 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1321 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1322 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1323 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1324 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1325 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1326 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1328 static inline struct btrfs_timespec *
1329 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1331 unsigned long ptr = (unsigned long)inode_item;
1332 ptr += offsetof(struct btrfs_inode_item, atime);
1333 return (struct btrfs_timespec *)ptr;
1336 static inline struct btrfs_timespec *
1337 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1339 unsigned long ptr = (unsigned long)inode_item;
1340 ptr += offsetof(struct btrfs_inode_item, mtime);
1341 return (struct btrfs_timespec *)ptr;
1344 static inline struct btrfs_timespec *
1345 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1347 unsigned long ptr = (unsigned long)inode_item;
1348 ptr += offsetof(struct btrfs_inode_item, ctime);
1349 return (struct btrfs_timespec *)ptr;
1352 static inline struct btrfs_timespec *
1353 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1355 unsigned long ptr = (unsigned long)inode_item;
1356 ptr += offsetof(struct btrfs_inode_item, otime);
1357 return (struct btrfs_timespec *)ptr;
1360 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1361 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1363 /* struct btrfs_dev_extent */
1364 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1366 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1367 chunk_objectid, 64);
1368 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1370 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1372 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1374 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1375 return (u8 *)((unsigned long)dev + ptr);
1378 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1379 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1381 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1383 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1386 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1388 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1389 struct btrfs_tree_block_info *item,
1390 struct btrfs_disk_key *key)
1392 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1395 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1396 struct btrfs_tree_block_info *item,
1397 struct btrfs_disk_key *key)
1399 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1402 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1404 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1406 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1408 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1411 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1414 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1416 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1419 static inline u32 btrfs_extent_inline_ref_size(int type)
1421 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1422 type == BTRFS_SHARED_BLOCK_REF_KEY)
1423 return sizeof(struct btrfs_extent_inline_ref);
1424 if (type == BTRFS_SHARED_DATA_REF_KEY)
1425 return sizeof(struct btrfs_shared_data_ref) +
1426 sizeof(struct btrfs_extent_inline_ref);
1427 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1428 return sizeof(struct btrfs_extent_data_ref) +
1429 offsetof(struct btrfs_extent_inline_ref, offset);
1434 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1435 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1437 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1438 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1440 /* struct btrfs_node */
1441 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1442 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1444 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1447 ptr = offsetof(struct btrfs_node, ptrs) +
1448 sizeof(struct btrfs_key_ptr) * nr;
1449 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1452 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1456 ptr = offsetof(struct btrfs_node, ptrs) +
1457 sizeof(struct btrfs_key_ptr) * nr;
1458 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1461 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1464 ptr = offsetof(struct btrfs_node, ptrs) +
1465 sizeof(struct btrfs_key_ptr) * nr;
1466 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1469 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1473 ptr = offsetof(struct btrfs_node, ptrs) +
1474 sizeof(struct btrfs_key_ptr) * nr;
1475 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1478 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1480 return offsetof(struct btrfs_node, ptrs) +
1481 sizeof(struct btrfs_key_ptr) * nr;
1484 void btrfs_node_key(struct extent_buffer *eb,
1485 struct btrfs_disk_key *disk_key, int nr);
1487 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1488 struct btrfs_disk_key *disk_key, int nr)
1491 ptr = btrfs_node_key_ptr_offset(nr);
1492 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1493 struct btrfs_key_ptr, key, disk_key);
1496 /* struct btrfs_item */
1497 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1498 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1500 static inline unsigned long btrfs_item_nr_offset(int nr)
1502 return offsetof(struct btrfs_leaf, items) +
1503 sizeof(struct btrfs_item) * nr;
1506 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1509 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1512 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1513 struct btrfs_item *item)
1515 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1518 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1520 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1523 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1525 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1528 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1530 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1533 static inline void btrfs_item_key(struct extent_buffer *eb,
1534 struct btrfs_disk_key *disk_key, int nr)
1536 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1537 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1540 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1541 struct btrfs_disk_key *disk_key, int nr)
1543 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1544 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1547 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1550 * struct btrfs_root_ref
1552 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1553 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1554 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1556 /* struct btrfs_dir_item */
1557 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1558 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1559 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1560 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1562 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1563 struct btrfs_dir_item *item,
1564 struct btrfs_disk_key *key)
1566 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1569 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1570 struct btrfs_dir_item *item,
1571 struct btrfs_disk_key *key)
1573 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1576 /* struct btrfs_disk_key */
1577 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1579 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1580 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1582 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1583 struct btrfs_disk_key *disk)
1585 cpu->offset = le64_to_cpu(disk->offset);
1586 cpu->type = disk->type;
1587 cpu->objectid = le64_to_cpu(disk->objectid);
1590 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1591 struct btrfs_key *cpu)
1593 disk->offset = cpu_to_le64(cpu->offset);
1594 disk->type = cpu->type;
1595 disk->objectid = cpu_to_le64(cpu->objectid);
1598 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1599 struct btrfs_key *key, int nr)
1601 struct btrfs_disk_key disk_key;
1602 btrfs_node_key(eb, &disk_key, nr);
1603 btrfs_disk_key_to_cpu(key, &disk_key);
1606 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1607 struct btrfs_key *key, int nr)
1609 struct btrfs_disk_key disk_key;
1610 btrfs_item_key(eb, &disk_key, nr);
1611 btrfs_disk_key_to_cpu(key, &disk_key);
1614 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1615 struct btrfs_dir_item *item,
1616 struct btrfs_key *key)
1618 struct btrfs_disk_key disk_key;
1619 btrfs_dir_item_key(eb, item, &disk_key);
1620 btrfs_disk_key_to_cpu(key, &disk_key);
1624 static inline u8 btrfs_key_type(struct btrfs_key *key)
1629 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1634 /* struct btrfs_header */
1635 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1636 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1638 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1639 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1640 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1641 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1643 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1645 return (btrfs_header_flags(eb) & flag) == flag;
1648 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1650 u64 flags = btrfs_header_flags(eb);
1651 btrfs_set_header_flags(eb, flags | flag);
1652 return (flags & flag) == flag;
1655 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1657 u64 flags = btrfs_header_flags(eb);
1658 btrfs_set_header_flags(eb, flags & ~flag);
1659 return (flags & flag) == flag;
1662 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1664 u64 flags = btrfs_header_flags(eb);
1665 return flags >> BTRFS_BACKREF_REV_SHIFT;
1668 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1671 u64 flags = btrfs_header_flags(eb);
1672 flags &= ~BTRFS_BACKREF_REV_MASK;
1673 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1674 btrfs_set_header_flags(eb, flags);
1677 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1679 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1683 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1685 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1689 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1691 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1695 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1697 unsigned long ptr = offsetof(struct btrfs_header, csum);
1701 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1706 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1711 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1716 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1718 return btrfs_header_level(eb) == 0;
1721 /* struct btrfs_root_item */
1722 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1724 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1725 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1726 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1728 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1730 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1731 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1732 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1733 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1734 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1735 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1736 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1737 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1740 /* struct btrfs_super_block */
1742 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1743 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1744 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1746 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1747 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1748 struct btrfs_super_block, sys_chunk_array_size, 32);
1749 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1750 struct btrfs_super_block, chunk_root_generation, 64);
1751 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1753 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1755 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1756 chunk_root_level, 8);
1757 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1759 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1760 log_root_transid, 64);
1761 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1763 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1765 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1767 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1769 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1771 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1773 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1775 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1776 root_dir_objectid, 64);
1777 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1779 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1781 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1783 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1784 incompat_flags, 64);
1785 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1788 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1790 int t = btrfs_super_csum_type(s);
1791 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1792 return btrfs_csum_sizes[t];
1795 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1797 return offsetof(struct btrfs_leaf, items);
1800 /* struct btrfs_file_extent_item */
1801 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1803 static inline unsigned long
1804 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1806 unsigned long offset = (unsigned long)e;
1807 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1811 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1813 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1816 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1818 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1820 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1821 disk_num_bytes, 64);
1822 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1824 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1826 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1828 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1830 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1832 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1833 other_encoding, 16);
1835 /* this returns the number of file bytes represented by the inline item.
1836 * If an item is compressed, this is the uncompressed size
1838 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1839 struct btrfs_file_extent_item *e)
1841 return btrfs_file_extent_ram_bytes(eb, e);
1845 * this returns the number of bytes used by the item on disk, minus the
1846 * size of any extent headers. If a file is compressed on disk, this is
1847 * the compressed size
1849 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1850 struct btrfs_item *e)
1852 unsigned long offset;
1853 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1854 return btrfs_item_size(eb, e) - offset;
1857 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1859 return sb->s_fs_info;
1862 static inline int btrfs_set_root_name(struct btrfs_root *root,
1863 const char *name, int len)
1865 /* if we already have a name just free it */
1868 root->name = kmalloc(len+1, GFP_KERNEL);
1872 memcpy(root->name, name, len);
1873 root->name[len] = '\0';
1878 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1881 return root->leafsize;
1882 return root->nodesize;
1885 /* helper function to cast into the data area of the leaf. */
1886 #define btrfs_item_ptr(leaf, slot, type) \
1887 ((type *)(btrfs_leaf_data(leaf) + \
1888 btrfs_item_offset_nr(leaf, slot)))
1890 #define btrfs_item_ptr_offset(leaf, slot) \
1891 ((unsigned long)(btrfs_leaf_data(leaf) + \
1892 btrfs_item_offset_nr(leaf, slot)))
1894 static inline struct dentry *fdentry(struct file *file)
1896 return file->f_path.dentry;
1900 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
1901 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1902 struct btrfs_root *root, unsigned long count);
1903 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1904 int btrfs_update_pinned_extents(struct btrfs_root *root,
1905 u64 bytenr, u64 num, int pin);
1906 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1907 struct btrfs_root *root, struct extent_buffer *leaf);
1908 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1909 struct btrfs_root *root,
1910 u64 objectid, u64 offset, u64 bytenr);
1911 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1912 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1913 struct btrfs_fs_info *info,
1915 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
1916 u64 btrfs_find_block_group(struct btrfs_root *root,
1917 u64 search_start, u64 search_hint, int owner);
1918 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1919 struct btrfs_root *root, u32 blocksize,
1920 u64 parent, u64 root_objectid,
1921 struct btrfs_disk_key *key, int level,
1922 u64 hint, u64 empty_size);
1923 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1924 struct btrfs_root *root,
1925 u64 bytenr, u32 blocksize,
1927 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
1928 struct btrfs_root *root,
1929 u64 root_objectid, u64 owner,
1930 u64 offset, struct btrfs_key *ins);
1931 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
1932 struct btrfs_root *root,
1933 u64 root_objectid, u64 owner, u64 offset,
1934 struct btrfs_key *ins);
1935 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1936 struct btrfs_root *root,
1937 u64 num_bytes, u64 min_alloc_size,
1938 u64 empty_size, u64 hint_byte,
1939 u64 search_end, struct btrfs_key *ins,
1941 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1942 struct extent_buffer *buf, int full_backref);
1943 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1944 struct extent_buffer *buf, int full_backref);
1945 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
1946 struct btrfs_root *root,
1947 u64 bytenr, u64 num_bytes, u64 flags,
1949 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *root,
1951 u64 bytenr, u64 num_bytes, u64 parent,
1952 u64 root_objectid, u64 owner, u64 offset);
1954 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1955 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1956 struct btrfs_root *root,
1957 struct extent_io_tree *unpin);
1958 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1959 struct btrfs_root *root,
1960 u64 bytenr, u64 num_bytes, u64 parent,
1961 u64 root_objectid, u64 owner, u64 offset);
1963 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root);
1965 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1966 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1967 int btrfs_read_block_groups(struct btrfs_root *root);
1968 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1969 struct btrfs_root *root, u64 bytes_used,
1970 u64 type, u64 chunk_objectid, u64 chunk_offset,
1972 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1973 struct btrfs_root *root, u64 group_start);
1974 int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
1975 struct btrfs_block_group_cache *group);
1977 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1978 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1979 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1981 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1982 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1984 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1985 struct inode *inode, u64 bytes);
1986 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1988 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1991 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
1992 int level, int *slot);
1993 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
1994 int btrfs_previous_item(struct btrfs_root *root,
1995 struct btrfs_path *path, u64 min_objectid,
1997 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root, struct btrfs_path *path,
1999 struct btrfs_key *new_key);
2000 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2001 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2002 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2003 struct btrfs_key *key, int lowest_level,
2004 int cache_only, u64 min_trans);
2005 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2006 struct btrfs_key *max_key,
2007 struct btrfs_path *path, int cache_only,
2009 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2010 struct btrfs_root *root, struct extent_buffer *buf,
2011 struct extent_buffer *parent, int parent_slot,
2012 struct extent_buffer **cow_ret);
2013 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2014 struct btrfs_root *root,
2015 struct extent_buffer *buf,
2016 struct extent_buffer **cow_ret, u64 new_root_objectid);
2017 int btrfs_block_can_be_shared(struct btrfs_root *root,
2018 struct extent_buffer *buf);
2019 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2020 *root, struct btrfs_path *path, u32 data_size);
2021 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2022 struct btrfs_root *root,
2023 struct btrfs_path *path,
2024 u32 new_size, int from_end);
2025 int btrfs_split_item(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root,
2027 struct btrfs_path *path,
2028 struct btrfs_key *new_key,
2029 unsigned long split_offset);
2030 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2031 *root, struct btrfs_key *key, struct btrfs_path *p, int
2033 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2034 struct btrfs_root *root, struct extent_buffer *parent,
2035 int start_slot, int cache_only, u64 *last_ret,
2036 struct btrfs_key *progress);
2037 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2038 struct btrfs_path *btrfs_alloc_path(void);
2039 void btrfs_free_path(struct btrfs_path *p);
2040 void btrfs_set_path_blocking(struct btrfs_path *p);
2041 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2043 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2044 struct btrfs_path *path, int slot, int nr);
2045 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2046 struct btrfs_root *root,
2047 struct btrfs_path *path)
2049 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2052 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2053 *root, struct btrfs_key *key, void *data, u32 data_size);
2054 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2055 struct btrfs_root *root,
2056 struct btrfs_path *path,
2057 struct btrfs_key *cpu_key, u32 *data_size,
2059 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2060 struct btrfs_root *root,
2061 struct btrfs_path *path,
2062 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2064 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2065 struct btrfs_root *root,
2066 struct btrfs_path *path,
2067 struct btrfs_key *key,
2070 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2073 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2074 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2075 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2076 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
2078 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2079 struct btrfs_root *root,
2080 struct extent_buffer *node,
2081 struct extent_buffer *parent);
2083 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2084 struct btrfs_path *path,
2085 u64 root_id, u64 ref_id);
2086 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2087 struct btrfs_root *tree_root,
2088 u64 root_id, u8 type, u64 ref_id,
2089 u64 dirid, u64 sequence,
2090 const char *name, int name_len);
2091 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2092 struct btrfs_key *key);
2093 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2094 *root, struct btrfs_key *key, struct btrfs_root_item
2096 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2097 *root, struct btrfs_key *key, struct btrfs_root_item
2099 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2100 btrfs_root_item *item, struct btrfs_key *key);
2101 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2102 u64 *found_objectid);
2103 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2104 int btrfs_set_root_node(struct btrfs_root_item *item,
2105 struct extent_buffer *node);
2107 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root, const char *name,
2109 int name_len, u64 dir,
2110 struct btrfs_key *location, u8 type, u64 index);
2111 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2112 struct btrfs_root *root,
2113 struct btrfs_path *path, u64 dir,
2114 const char *name, int name_len,
2116 struct btrfs_dir_item *
2117 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2118 struct btrfs_root *root,
2119 struct btrfs_path *path, u64 dir,
2120 u64 objectid, const char *name, int name_len,
2122 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2123 struct btrfs_path *path,
2124 const char *name, int name_len);
2125 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2126 struct btrfs_root *root,
2127 struct btrfs_path *path,
2128 struct btrfs_dir_item *di);
2129 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2130 struct btrfs_root *root, const char *name,
2131 u16 name_len, const void *data, u16 data_len,
2133 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2134 struct btrfs_root *root,
2135 struct btrfs_path *path, u64 dir,
2136 const char *name, u16 name_len,
2140 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2141 struct btrfs_root *root, u64 offset);
2142 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2143 struct btrfs_root *root, u64 offset);
2146 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2147 struct btrfs_root *fs_root,
2148 u64 dirid, u64 *objectid);
2149 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2152 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2153 struct btrfs_root *root,
2154 const char *name, int name_len,
2155 u64 inode_objectid, u64 ref_objectid, u64 index);
2156 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2157 struct btrfs_root *root,
2158 const char *name, int name_len,
2159 u64 inode_objectid, u64 ref_objectid, u64 *index);
2160 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2161 struct btrfs_root *root,
2162 struct btrfs_path *path, u64 objectid);
2163 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2164 *root, struct btrfs_path *path,
2165 struct btrfs_key *location, int mod);
2168 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2169 struct btrfs_root *root, u64 bytenr, u64 len);
2170 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2171 struct bio *bio, u32 *dst);
2172 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root,
2174 u64 objectid, u64 pos,
2175 u64 disk_offset, u64 disk_num_bytes,
2176 u64 num_bytes, u64 offset, u64 ram_bytes,
2177 u8 compression, u8 encryption, u16 other_encoding);
2178 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2179 struct btrfs_root *root,
2180 struct btrfs_path *path, u64 objectid,
2181 u64 bytenr, int mod);
2182 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2183 struct btrfs_root *root,
2184 struct btrfs_ordered_sum *sums);
2185 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2186 struct bio *bio, u64 file_start, int contig);
2187 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2188 u64 start, unsigned long len);
2189 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2190 struct btrfs_root *root,
2191 struct btrfs_path *path,
2192 u64 bytenr, int cow);
2193 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2194 struct btrfs_root *root, struct btrfs_path *path,
2196 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2197 u64 end, struct list_head *list);
2200 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2201 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2202 #define ClearPageChecked ClearPageFsMisc
2203 #define SetPageChecked SetPageFsMisc
2204 #define PageChecked PageFsMisc
2207 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2208 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2209 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root,
2211 struct inode *dir, struct inode *inode,
2212 const char *name, int name_len);
2213 int btrfs_add_link(struct btrfs_trans_handle *trans,
2214 struct inode *parent_inode, struct inode *inode,
2215 const char *name, int name_len, int add_backref, u64 index);
2216 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2217 struct btrfs_root *root,
2218 struct inode *inode, u64 new_size,
2221 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2222 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2223 int btrfs_writepages(struct address_space *mapping,
2224 struct writeback_control *wbc);
2225 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2226 struct btrfs_root *new_root, struct dentry *dentry,
2227 u64 new_dirid, u64 alloc_hint);
2228 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2229 size_t size, struct bio *bio, unsigned long bio_flags);
2231 unsigned long btrfs_force_ra(struct address_space *mapping,
2232 struct file_ra_state *ra, struct file *file,
2233 pgoff_t offset, pgoff_t last_index);
2234 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2235 int btrfs_readpage(struct file *file, struct page *page);
2236 void btrfs_delete_inode(struct inode *inode);
2237 void btrfs_put_inode(struct inode *inode);
2238 int btrfs_write_inode(struct inode *inode, int wait);
2239 void btrfs_dirty_inode(struct inode *inode);
2240 struct inode *btrfs_alloc_inode(struct super_block *sb);
2241 void btrfs_destroy_inode(struct inode *inode);
2242 int btrfs_init_cachep(void);
2243 void btrfs_destroy_cachep(void);
2244 long btrfs_ioctl_trans_end(struct file *file);
2245 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2246 struct btrfs_root *root);
2247 int btrfs_commit_write(struct file *file, struct page *page,
2248 unsigned from, unsigned to);
2249 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2250 size_t page_offset, u64 start, u64 end,
2252 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2253 struct btrfs_root *root,
2254 struct inode *inode);
2255 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2256 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2257 void btrfs_orphan_cleanup(struct btrfs_root *root);
2258 int btrfs_cont_expand(struct inode *inode, loff_t size);
2261 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2264 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2265 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2267 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2268 extern struct file_operations btrfs_file_operations;
2269 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2270 struct btrfs_root *root, struct inode *inode,
2271 u64 start, u64 end, u64 locked_end,
2272 u64 inline_limit, u64 *hint_block);
2273 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root,
2275 struct inode *inode, u64 start, u64 end);
2276 int btrfs_release_file(struct inode *inode, struct file *file);
2279 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2280 struct btrfs_root *root, int cache_only);
2283 int btrfs_init_sysfs(void);
2284 void btrfs_exit_sysfs(void);
2285 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2286 int btrfs_sysfs_add_root(struct btrfs_root *root);
2287 void btrfs_sysfs_del_root(struct btrfs_root *root);
2288 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2291 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2294 u64 btrfs_parse_size(char *str);
2295 int btrfs_parse_options(struct btrfs_root *root, char *options);
2296 int btrfs_sync_fs(struct super_block *sb, int wait);
2299 int btrfs_check_acl(struct inode *inode, int mask);
2300 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2301 int btrfs_acl_chmod(struct inode *inode);
2304 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2305 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2306 struct btrfs_root *root);
2307 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2308 struct btrfs_root *root);
2309 int btrfs_recover_relocation(struct btrfs_root *root);
2310 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);