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__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_transaction_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 struct btrfs_ordered_sum;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
56 * files bigger than this get some pre-flushing when they are added
57 * to the ordered operations list. That way we limit the total
58 * work done by the commit
60 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
62 /* holds pointers to all of the tree roots */
63 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
65 /* stores information about which extents are in use, and reference counts */
66 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
69 * chunk tree stores translations from logical -> physical block numbering
70 * the super block points to the chunk tree
72 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
75 * stores information about which areas of a given device are in use.
76 * one per device. The tree of tree roots points to the device tree
78 #define BTRFS_DEV_TREE_OBJECTID 4ULL
80 /* one per subvolume, storing files and directories */
81 #define BTRFS_FS_TREE_OBJECTID 5ULL
83 /* directory objectid inside the root tree */
84 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
86 /* holds checksums of all the data extents */
87 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
89 /* for storing balance parameters in the root tree */
90 #define BTRFS_BALANCE_OBJECTID -4ULL
92 /* orhpan objectid for tracking unlinked/truncated files */
93 #define BTRFS_ORPHAN_OBJECTID -5ULL
95 /* does write ahead logging to speed up fsyncs */
96 #define BTRFS_TREE_LOG_OBJECTID -6ULL
97 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
99 /* for space balancing */
100 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
101 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
104 * extent checksums all have this objectid
105 * this allows them to share the logging tree
108 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
110 /* For storing free space cache */
111 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
114 * The inode number assigned to the special inode for sotring
117 #define BTRFS_FREE_INO_OBJECTID -12ULL
119 /* dummy objectid represents multiple objectids */
120 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
123 * All files have objectids in this range.
125 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
126 #define BTRFS_LAST_FREE_OBJECTID -256ULL
127 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
131 * the device items go into the chunk tree. The key is in the form
132 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
134 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
136 #define BTRFS_BTREE_INODE_OBJECTID 1
138 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
141 * we can actually store much bigger names, but lets not confuse the rest
144 #define BTRFS_NAME_LEN 255
146 /* 32 bytes in various csum fields */
147 #define BTRFS_CSUM_SIZE 32
150 #define BTRFS_CSUM_TYPE_CRC32 0
152 static int btrfs_csum_sizes[] = { 4, 0 };
154 /* four bytes for CRC32 */
155 #define BTRFS_EMPTY_DIR_SIZE 0
157 #define BTRFS_FT_UNKNOWN 0
158 #define BTRFS_FT_REG_FILE 1
159 #define BTRFS_FT_DIR 2
160 #define BTRFS_FT_CHRDEV 3
161 #define BTRFS_FT_BLKDEV 4
162 #define BTRFS_FT_FIFO 5
163 #define BTRFS_FT_SOCK 6
164 #define BTRFS_FT_SYMLINK 7
165 #define BTRFS_FT_XATTR 8
166 #define BTRFS_FT_MAX 9
169 * The key defines the order in the tree, and so it also defines (optimal)
172 * objectid corresponds to the inode number.
174 * type tells us things about the object, and is a kind of stream selector.
175 * so for a given inode, keys with type of 1 might refer to the inode data,
176 * type of 2 may point to file data in the btree and type == 3 may point to
179 * offset is the starting byte offset for this key in the stream.
181 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
182 * in cpu native order. Otherwise they are identical and their sizes
183 * should be the same (ie both packed)
185 struct btrfs_disk_key {
189 } __attribute__ ((__packed__));
195 } __attribute__ ((__packed__));
197 struct btrfs_mapping_tree {
198 struct extent_map_tree map_tree;
201 struct btrfs_dev_item {
202 /* the internal btrfs device id */
205 /* size of the device */
211 /* optimal io alignment for this device */
214 /* optimal io width for this device */
217 /* minimal io size for this device */
220 /* type and info about this device */
223 /* expected generation for this device */
227 * starting byte of this partition on the device,
228 * to allow for stripe alignment in the future
232 /* grouping information for allocation decisions */
235 /* seek speed 0-100 where 100 is fastest */
238 /* bandwidth 0-100 where 100 is fastest */
241 /* btrfs generated uuid for this device */
242 u8 uuid[BTRFS_UUID_SIZE];
244 /* uuid of FS who owns this device */
245 u8 fsid[BTRFS_UUID_SIZE];
246 } __attribute__ ((__packed__));
248 struct btrfs_stripe {
251 u8 dev_uuid[BTRFS_UUID_SIZE];
252 } __attribute__ ((__packed__));
255 /* size of this chunk in bytes */
258 /* objectid of the root referencing this chunk */
264 /* optimal io alignment for this chunk */
267 /* optimal io width for this chunk */
270 /* minimal io size for this chunk */
273 /* 2^16 stripes is quite a lot, a second limit is the size of a single
278 /* sub stripes only matter for raid10 */
280 struct btrfs_stripe stripe;
281 /* additional stripes go here */
282 } __attribute__ ((__packed__));
284 #define BTRFS_FREE_SPACE_EXTENT 1
285 #define BTRFS_FREE_SPACE_BITMAP 2
287 struct btrfs_free_space_entry {
291 } __attribute__ ((__packed__));
293 struct btrfs_free_space_header {
294 struct btrfs_disk_key location;
298 } __attribute__ ((__packed__));
300 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
302 BUG_ON(num_stripes == 0);
303 return sizeof(struct btrfs_chunk) +
304 sizeof(struct btrfs_stripe) * (num_stripes - 1);
307 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
308 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
314 /* Errors detected */
315 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
317 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
318 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
320 #define BTRFS_BACKREF_REV_MAX 256
321 #define BTRFS_BACKREF_REV_SHIFT 56
322 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
323 BTRFS_BACKREF_REV_SHIFT)
325 #define BTRFS_OLD_BACKREF_REV 0
326 #define BTRFS_MIXED_BACKREF_REV 1
329 * every tree block (leaf or node) starts with this header.
331 struct btrfs_header {
332 /* these first four must match the super block */
333 u8 csum[BTRFS_CSUM_SIZE];
334 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
335 __le64 bytenr; /* which block this node is supposed to live in */
338 /* allowed to be different from the super from here on down */
339 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
344 } __attribute__ ((__packed__));
346 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
347 sizeof(struct btrfs_header)) / \
348 sizeof(struct btrfs_key_ptr))
349 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
350 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
351 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) - \
353 sizeof(struct btrfs_file_extent_item))
354 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
355 sizeof(struct btrfs_item) -\
356 sizeof(struct btrfs_dir_item))
360 * this is a very generous portion of the super block, giving us
361 * room to translate 14 chunks with 3 stripes each.
363 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
364 #define BTRFS_LABEL_SIZE 256
367 * just in case we somehow lose the roots and are not able to mount,
368 * we store an array of the roots from previous transactions
371 #define BTRFS_NUM_BACKUP_ROOTS 4
372 struct btrfs_root_backup {
374 __le64 tree_root_gen;
377 __le64 chunk_root_gen;
380 __le64 extent_root_gen;
389 __le64 csum_root_gen;
399 u8 extent_root_level;
403 /* future and to align */
405 } __attribute__ ((__packed__));
408 * the super block basically lists the main trees of the FS
409 * it currently lacks any block count etc etc
411 struct btrfs_super_block {
412 u8 csum[BTRFS_CSUM_SIZE];
413 /* the first 4 fields must match struct btrfs_header */
414 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
415 __le64 bytenr; /* this block number */
418 /* allowed to be different from the btrfs_header from here own down */
425 /* this will help find the new super based on the log root */
426 __le64 log_root_transid;
429 __le64 root_dir_objectid;
435 __le32 sys_chunk_array_size;
436 __le64 chunk_root_generation;
438 __le64 compat_ro_flags;
439 __le64 incompat_flags;
444 struct btrfs_dev_item dev_item;
446 char label[BTRFS_LABEL_SIZE];
448 __le64 cache_generation;
450 /* future expansion */
452 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
453 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
454 } __attribute__ ((__packed__));
457 * Compat flags that we support. If any incompat flags are set other than the
458 * ones specified below then we will fail to mount
460 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
461 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
462 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
463 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
465 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
466 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
467 #define BTRFS_FEATURE_INCOMPAT_SUPP \
468 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
469 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
470 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
471 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
474 * A leaf is full of items. offset and size tell us where to find
475 * the item in the leaf (relative to the start of the data area)
478 struct btrfs_disk_key key;
481 } __attribute__ ((__packed__));
484 * leaves have an item area and a data area:
485 * [item0, item1....itemN] [free space] [dataN...data1, data0]
487 * The data is separate from the items to get the keys closer together
491 struct btrfs_header header;
492 struct btrfs_item items[];
493 } __attribute__ ((__packed__));
496 * all non-leaf blocks are nodes, they hold only keys and pointers to
499 struct btrfs_key_ptr {
500 struct btrfs_disk_key key;
503 } __attribute__ ((__packed__));
506 struct btrfs_header header;
507 struct btrfs_key_ptr ptrs[];
508 } __attribute__ ((__packed__));
511 * btrfs_paths remember the path taken from the root down to the leaf.
512 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
513 * to any other levels that are present.
515 * The slots array records the index of the item or block pointer
516 * used while walking the tree.
519 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
520 int slots[BTRFS_MAX_LEVEL];
521 /* if there is real range locking, this locks field will change */
522 int locks[BTRFS_MAX_LEVEL];
524 /* keep some upper locks as we walk down */
528 * set by btrfs_split_item, tells search_slot to keep all locks
529 * and to force calls to keep space in the nodes
531 unsigned int search_for_split:1;
532 unsigned int keep_locks:1;
533 unsigned int skip_locking:1;
534 unsigned int leave_spinning:1;
535 unsigned int search_commit_root:1;
539 * items in the extent btree are used to record the objectid of the
540 * owner of the block and the number of references
543 struct btrfs_extent_item {
547 } __attribute__ ((__packed__));
549 struct btrfs_extent_item_v0 {
551 } __attribute__ ((__packed__));
553 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
554 sizeof(struct btrfs_item))
556 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
557 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
559 /* following flags only apply to tree blocks */
561 /* use full backrefs for extent pointers in the block */
562 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
565 * this flag is only used internally by scrub and may be changed at any time
566 * it is only declared here to avoid collisions
568 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
570 struct btrfs_tree_block_info {
571 struct btrfs_disk_key key;
573 } __attribute__ ((__packed__));
575 struct btrfs_extent_data_ref {
580 } __attribute__ ((__packed__));
582 struct btrfs_shared_data_ref {
584 } __attribute__ ((__packed__));
586 struct btrfs_extent_inline_ref {
589 } __attribute__ ((__packed__));
591 /* old style backrefs item */
592 struct btrfs_extent_ref_v0 {
597 } __attribute__ ((__packed__));
600 /* dev extents record free space on individual devices. The owner
601 * field points back to the chunk allocation mapping tree that allocated
602 * the extent. The chunk tree uuid field is a way to double check the owner
604 struct btrfs_dev_extent {
606 __le64 chunk_objectid;
609 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
610 } __attribute__ ((__packed__));
612 struct btrfs_inode_ref {
616 } __attribute__ ((__packed__));
618 struct btrfs_timespec {
621 } __attribute__ ((__packed__));
623 enum btrfs_compression_type {
624 BTRFS_COMPRESS_NONE = 0,
625 BTRFS_COMPRESS_ZLIB = 1,
626 BTRFS_COMPRESS_LZO = 2,
627 BTRFS_COMPRESS_TYPES = 2,
628 BTRFS_COMPRESS_LAST = 3,
631 struct btrfs_inode_item {
632 /* nfs style generation number */
634 /* transid that last touched this inode */
646 /* modification sequence number for NFS */
650 * a little future expansion, for more than this we can
651 * just grow the inode item and version it
654 struct btrfs_timespec atime;
655 struct btrfs_timespec ctime;
656 struct btrfs_timespec mtime;
657 struct btrfs_timespec otime;
658 } __attribute__ ((__packed__));
660 struct btrfs_dir_log_item {
662 } __attribute__ ((__packed__));
664 struct btrfs_dir_item {
665 struct btrfs_disk_key location;
670 } __attribute__ ((__packed__));
672 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
674 struct btrfs_root_item {
675 struct btrfs_inode_item inode;
681 __le64 last_snapshot;
684 struct btrfs_disk_key drop_progress;
687 } __attribute__ ((__packed__));
690 * this is used for both forward and backward root refs
692 struct btrfs_root_ref {
696 } __attribute__ ((__packed__));
698 struct btrfs_disk_balance_args {
700 * profiles to operate on, single is denoted by
701 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
711 /* devid subset filter [pstart..pend) */
715 /* btrfs virtual address space subset filter [vstart..vend) */
720 * profile to convert to, single is denoted by
721 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
725 /* BTRFS_BALANCE_ARGS_* */
729 } __attribute__ ((__packed__));
732 * store balance parameters to disk so that balance can be properly
733 * resumed after crash or unmount
735 struct btrfs_balance_item {
736 /* BTRFS_BALANCE_* */
739 struct btrfs_disk_balance_args data;
740 struct btrfs_disk_balance_args meta;
741 struct btrfs_disk_balance_args sys;
744 } __attribute__ ((__packed__));
746 #define BTRFS_FILE_EXTENT_INLINE 0
747 #define BTRFS_FILE_EXTENT_REG 1
748 #define BTRFS_FILE_EXTENT_PREALLOC 2
750 struct btrfs_file_extent_item {
752 * transaction id that created this extent
756 * max number of bytes to hold this extent in ram
757 * when we split a compressed extent we can't know how big
758 * each of the resulting pieces will be. So, this is
759 * an upper limit on the size of the extent in ram instead of
765 * 32 bits for the various ways we might encode the data,
766 * including compression and encryption. If any of these
767 * are set to something a given disk format doesn't understand
768 * it is treated like an incompat flag for reading and writing,
773 __le16 other_encoding; /* spare for later use */
775 /* are we inline data or a real extent? */
779 * disk space consumed by the extent, checksum blocks are included
783 __le64 disk_num_bytes;
785 * the logical offset in file blocks (no csums)
786 * this extent record is for. This allows a file extent to point
787 * into the middle of an existing extent on disk, sharing it
788 * between two snapshots (useful if some bytes in the middle of the
789 * extent have changed
793 * the logical number of file blocks (no csums included). This
794 * always reflects the size uncompressed and without encoding.
798 } __attribute__ ((__packed__));
800 struct btrfs_csum_item {
802 } __attribute__ ((__packed__));
804 /* different types of block groups (and chunks) */
805 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
806 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
807 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
808 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
809 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
810 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
811 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
812 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
813 #define BTRFS_NR_RAID_TYPES 5
815 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
816 BTRFS_BLOCK_GROUP_SYSTEM | \
817 BTRFS_BLOCK_GROUP_METADATA)
819 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
820 BTRFS_BLOCK_GROUP_RAID1 | \
821 BTRFS_BLOCK_GROUP_DUP | \
822 BTRFS_BLOCK_GROUP_RAID10)
824 * We need a bit for restriper to be able to tell when chunks of type
825 * SINGLE are available. This "extended" profile format is used in
826 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
827 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
828 * to avoid remappings between two formats in future.
830 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
832 struct btrfs_block_group_item {
834 __le64 chunk_objectid;
836 } __attribute__ ((__packed__));
838 struct btrfs_space_info {
841 u64 total_bytes; /* total bytes in the space,
842 this doesn't take mirrors into account */
843 u64 bytes_used; /* total bytes used,
844 this doesn't take mirrors into account */
845 u64 bytes_pinned; /* total bytes pinned, will be freed when the
846 transaction finishes */
847 u64 bytes_reserved; /* total bytes the allocator has reserved for
848 current allocations */
849 u64 bytes_readonly; /* total bytes that are read only */
851 u64 bytes_may_use; /* number of bytes that may be used for
852 delalloc/allocations */
853 u64 disk_used; /* total bytes used on disk */
854 u64 disk_total; /* total bytes on disk, takes mirrors into
858 * we bump reservation progress every time we decrement
859 * bytes_reserved. This way people waiting for reservations
860 * know something good has happened and they can check
861 * for progress. The number here isn't to be trusted, it
862 * just shows reclaim activity
864 unsigned long reservation_progress;
866 unsigned int full:1; /* indicates that we cannot allocate any more
867 chunks for this space */
868 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
870 unsigned int flush:1; /* set if we are trying to make space */
872 unsigned int force_alloc; /* set if we need to force a chunk
873 alloc for this space */
875 struct list_head list;
877 /* for block groups in our same type */
878 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
880 struct rw_semaphore groups_sem;
881 wait_queue_head_t wait;
884 struct btrfs_block_rsv {
887 struct btrfs_space_info *space_info;
893 * free clusters are used to claim free space in relatively large chunks,
894 * allowing us to do less seeky writes. They are used for all metadata
895 * allocations and data allocations in ssd mode.
897 struct btrfs_free_cluster {
899 spinlock_t refill_lock;
902 /* largest extent in this cluster */
905 /* first extent starting offset */
908 struct btrfs_block_group_cache *block_group;
910 * when a cluster is allocated from a block group, we put the
911 * cluster onto a list in the block group so that it can
912 * be freed before the block group is freed.
914 struct list_head block_group_list;
917 enum btrfs_caching_type {
919 BTRFS_CACHE_STARTED = 1,
920 BTRFS_CACHE_FAST = 2,
921 BTRFS_CACHE_FINISHED = 3,
924 enum btrfs_disk_cache_state {
925 BTRFS_DC_WRITTEN = 0,
929 BTRFS_DC_NEED_WRITE = 4,
932 struct btrfs_caching_control {
933 struct list_head list;
935 wait_queue_head_t wait;
936 struct btrfs_work work;
937 struct btrfs_block_group_cache *block_group;
942 struct btrfs_block_group_cache {
943 struct btrfs_key key;
944 struct btrfs_block_group_item item;
945 struct btrfs_fs_info *fs_info;
953 u64 cache_generation;
955 unsigned int dirty:1;
958 int disk_cache_state;
960 /* cache tracking stuff */
962 struct btrfs_caching_control *caching_ctl;
963 u64 last_byte_to_unpin;
965 struct btrfs_space_info *space_info;
967 /* free space cache stuff */
968 struct btrfs_free_space_ctl *free_space_ctl;
970 /* block group cache stuff */
971 struct rb_node cache_node;
973 /* for block groups in the same raid type */
974 struct list_head list;
979 /* List of struct btrfs_free_clusters for this block group.
980 * Today it will only have one thing on it, but that may change
982 struct list_head cluster_list;
985 struct reloc_control;
987 struct btrfs_fs_devices;
988 struct btrfs_balance_control;
989 struct btrfs_delayed_root;
990 struct btrfs_fs_info {
991 u8 fsid[BTRFS_FSID_SIZE];
992 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
993 struct btrfs_root *extent_root;
994 struct btrfs_root *tree_root;
995 struct btrfs_root *chunk_root;
996 struct btrfs_root *dev_root;
997 struct btrfs_root *fs_root;
998 struct btrfs_root *csum_root;
1000 /* the log root tree is a directory of all the other log roots */
1001 struct btrfs_root *log_root_tree;
1003 spinlock_t fs_roots_radix_lock;
1004 struct radix_tree_root fs_roots_radix;
1006 /* block group cache stuff */
1007 spinlock_t block_group_cache_lock;
1008 struct rb_root block_group_cache_tree;
1010 /* keep track of unallocated space */
1011 spinlock_t free_chunk_lock;
1012 u64 free_chunk_space;
1014 struct extent_io_tree freed_extents[2];
1015 struct extent_io_tree *pinned_extents;
1017 /* logical->physical extent mapping */
1018 struct btrfs_mapping_tree mapping_tree;
1021 * block reservation for extent, checksum, root tree and
1022 * delayed dir index item
1024 struct btrfs_block_rsv global_block_rsv;
1025 /* block reservation for delay allocation */
1026 struct btrfs_block_rsv delalloc_block_rsv;
1027 /* block reservation for metadata operations */
1028 struct btrfs_block_rsv trans_block_rsv;
1029 /* block reservation for chunk tree */
1030 struct btrfs_block_rsv chunk_block_rsv;
1031 /* block reservation for delayed operations */
1032 struct btrfs_block_rsv delayed_block_rsv;
1034 struct btrfs_block_rsv empty_block_rsv;
1037 u64 last_trans_committed;
1040 * this is updated to the current trans every time a full commit
1041 * is required instead of the faster short fsync log commits
1043 u64 last_trans_log_full_commit;
1044 unsigned long mount_opt:21;
1045 unsigned long compress_type:4;
1048 struct btrfs_transaction *running_transaction;
1049 wait_queue_head_t transaction_throttle;
1050 wait_queue_head_t transaction_wait;
1051 wait_queue_head_t transaction_blocked_wait;
1052 wait_queue_head_t async_submit_wait;
1054 struct btrfs_super_block *super_copy;
1055 struct btrfs_super_block *super_for_commit;
1056 struct block_device *__bdev;
1057 struct super_block *sb;
1058 struct inode *btree_inode;
1059 struct backing_dev_info bdi;
1060 struct mutex tree_log_mutex;
1061 struct mutex transaction_kthread_mutex;
1062 struct mutex cleaner_mutex;
1063 struct mutex chunk_mutex;
1064 struct mutex volume_mutex;
1066 * this protects the ordered operations list only while we are
1067 * processing all of the entries on it. This way we make
1068 * sure the commit code doesn't find the list temporarily empty
1069 * because another function happens to be doing non-waiting preflush
1070 * before jumping into the main commit.
1072 struct mutex ordered_operations_mutex;
1073 struct rw_semaphore extent_commit_sem;
1075 struct rw_semaphore cleanup_work_sem;
1077 struct rw_semaphore subvol_sem;
1078 struct srcu_struct subvol_srcu;
1080 spinlock_t trans_lock;
1082 * the reloc mutex goes with the trans lock, it is taken
1083 * during commit to protect us from the relocation code
1085 struct mutex reloc_mutex;
1087 struct list_head trans_list;
1088 struct list_head hashers;
1089 struct list_head dead_roots;
1090 struct list_head caching_block_groups;
1092 spinlock_t delayed_iput_lock;
1093 struct list_head delayed_iputs;
1095 atomic_t nr_async_submits;
1096 atomic_t async_submit_draining;
1097 atomic_t nr_async_bios;
1098 atomic_t async_delalloc_pages;
1099 atomic_t open_ioctl_trans;
1102 * this is used by the balancing code to wait for all the pending
1105 spinlock_t ordered_extent_lock;
1108 * all of the data=ordered extents pending writeback
1109 * these can span multiple transactions and basically include
1110 * every dirty data page that isn't from nodatacow
1112 struct list_head ordered_extents;
1115 * all of the inodes that have delalloc bytes. It is possible for
1116 * this list to be empty even when there is still dirty data=ordered
1117 * extents waiting to finish IO.
1119 struct list_head delalloc_inodes;
1122 * special rename and truncate targets that must be on disk before
1123 * we're allowed to commit. This is basically the ext3 style
1124 * data=ordered list.
1126 struct list_head ordered_operations;
1129 * there is a pool of worker threads for checksumming during writes
1130 * and a pool for checksumming after reads. This is because readers
1131 * can run with FS locks held, and the writers may be waiting for
1132 * those locks. We don't want ordering in the pending list to cause
1133 * deadlocks, and so the two are serviced separately.
1135 * A third pool does submit_bio to avoid deadlocking with the other
1138 struct btrfs_workers generic_worker;
1139 struct btrfs_workers workers;
1140 struct btrfs_workers delalloc_workers;
1141 struct btrfs_workers endio_workers;
1142 struct btrfs_workers endio_meta_workers;
1143 struct btrfs_workers endio_meta_write_workers;
1144 struct btrfs_workers endio_write_workers;
1145 struct btrfs_workers endio_freespace_worker;
1146 struct btrfs_workers submit_workers;
1147 struct btrfs_workers caching_workers;
1148 struct btrfs_workers readahead_workers;
1151 * fixup workers take dirty pages that didn't properly go through
1152 * the cow mechanism and make them safe to write. It happens
1153 * for the sys_munmap function call path
1155 struct btrfs_workers fixup_workers;
1156 struct btrfs_workers delayed_workers;
1157 struct task_struct *transaction_kthread;
1158 struct task_struct *cleaner_kthread;
1159 int thread_pool_size;
1161 struct kobject super_kobj;
1162 struct completion kobj_unregister;
1165 int log_root_recovering;
1171 /* protected by the delalloc lock, used to keep from writing
1172 * metadata until there is a nice batch
1174 u64 dirty_metadata_bytes;
1175 struct list_head dirty_cowonly_roots;
1177 struct btrfs_fs_devices *fs_devices;
1180 * the space_info list is almost entirely read only. It only changes
1181 * when we add a new raid type to the FS, and that happens
1182 * very rarely. RCU is used to protect it.
1184 struct list_head space_info;
1186 struct reloc_control *reloc_ctl;
1188 spinlock_t delalloc_lock;
1191 /* data_alloc_cluster is only used in ssd mode */
1192 struct btrfs_free_cluster data_alloc_cluster;
1194 /* all metadata allocations go through this cluster */
1195 struct btrfs_free_cluster meta_alloc_cluster;
1197 /* auto defrag inodes go here */
1198 spinlock_t defrag_inodes_lock;
1199 struct rb_root defrag_inodes;
1200 atomic_t defrag_running;
1202 spinlock_t ref_cache_lock;
1203 u64 total_ref_cache_size;
1206 * these three are in extended format (availability of single
1207 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1208 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1210 u64 avail_data_alloc_bits;
1211 u64 avail_metadata_alloc_bits;
1212 u64 avail_system_alloc_bits;
1214 /* restriper state */
1215 spinlock_t balance_lock;
1216 struct mutex balance_mutex;
1217 atomic_t balance_running;
1218 atomic_t balance_pause_req;
1219 atomic_t balance_cancel_req;
1220 struct btrfs_balance_control *balance_ctl;
1221 wait_queue_head_t balance_wait_q;
1223 unsigned data_chunk_allocations;
1224 unsigned metadata_ratio;
1228 /* private scrub information */
1229 struct mutex scrub_lock;
1230 atomic_t scrubs_running;
1231 atomic_t scrub_pause_req;
1232 atomic_t scrubs_paused;
1233 atomic_t scrub_cancel_req;
1234 wait_queue_head_t scrub_pause_wait;
1235 struct rw_semaphore scrub_super_lock;
1236 int scrub_workers_refcnt;
1237 struct btrfs_workers scrub_workers;
1239 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1240 u32 check_integrity_print_mask;
1243 /* filesystem state */
1246 struct btrfs_delayed_root *delayed_root;
1248 /* readahead tree */
1249 spinlock_t reada_lock;
1250 struct radix_tree_root reada_tree;
1252 /* next backup root to be overwritten */
1253 int backup_root_index;
1257 * in ram representation of the tree. extent_root is used for all allocations
1258 * and for the extent tree extent_root root.
1261 struct extent_buffer *node;
1263 struct extent_buffer *commit_root;
1264 struct btrfs_root *log_root;
1265 struct btrfs_root *reloc_root;
1267 struct btrfs_root_item root_item;
1268 struct btrfs_key root_key;
1269 struct btrfs_fs_info *fs_info;
1270 struct extent_io_tree dirty_log_pages;
1272 struct kobject root_kobj;
1273 struct completion kobj_unregister;
1274 struct mutex objectid_mutex;
1276 spinlock_t accounting_lock;
1277 struct btrfs_block_rsv *block_rsv;
1279 /* free ino cache stuff */
1280 struct mutex fs_commit_mutex;
1281 struct btrfs_free_space_ctl *free_ino_ctl;
1282 enum btrfs_caching_type cached;
1283 spinlock_t cache_lock;
1284 wait_queue_head_t cache_wait;
1285 struct btrfs_free_space_ctl *free_ino_pinned;
1287 struct inode *cache_inode;
1289 struct mutex log_mutex;
1290 wait_queue_head_t log_writer_wait;
1291 wait_queue_head_t log_commit_wait[2];
1292 atomic_t log_writers;
1293 atomic_t log_commit[2];
1294 unsigned long log_transid;
1295 unsigned long last_log_commit;
1296 unsigned long log_batch;
1297 pid_t log_start_pid;
1298 bool log_multiple_pids;
1303 /* data allocations are done in sectorsize units */
1306 /* node allocations are done in nodesize units */
1309 /* leaf allocations are done in leafsize units */
1316 u64 highest_objectid;
1318 /* btrfs_record_root_in_trans is a multi-step process,
1319 * and it can race with the balancing code. But the
1320 * race is very small, and only the first time the root
1321 * is added to each transaction. So in_trans_setup
1322 * is used to tell us when more checks are required
1324 unsigned long in_trans_setup;
1329 u64 defrag_trans_start;
1330 struct btrfs_key defrag_progress;
1331 struct btrfs_key defrag_max;
1335 /* the dirty list is only used by non-reference counted roots */
1336 struct list_head dirty_list;
1338 struct list_head root_list;
1340 spinlock_t orphan_lock;
1341 struct list_head orphan_list;
1342 struct btrfs_block_rsv *orphan_block_rsv;
1343 int orphan_item_inserted;
1344 int orphan_cleanup_state;
1346 spinlock_t inode_lock;
1347 /* red-black tree that keeps track of in-memory inodes */
1348 struct rb_root inode_tree;
1351 * radix tree that keeps track of delayed nodes of every inode,
1352 * protected by inode_lock
1354 struct radix_tree_root delayed_nodes_tree;
1356 * right now this just gets used so that a root has its own devid
1357 * for stat. It may be used for more later
1364 struct btrfs_ioctl_defrag_range_args {
1365 /* start of the defrag operation */
1368 /* number of bytes to defrag, use (u64)-1 to say all */
1372 * flags for the operation, which can include turning
1373 * on compression for this one defrag
1378 * any extent bigger than this will be considered
1379 * already defragged. Use 0 to take the kernel default
1380 * Use 1 to say every single extent must be rewritten
1382 __u32 extent_thresh;
1385 * which compression method to use if turning on compression
1386 * for this defrag operation. If unspecified, zlib will
1389 __u32 compress_type;
1391 /* spare for later */
1397 * inode items have the data typically returned from stat and store other
1398 * info about object characteristics. There is one for every file and dir in
1401 #define BTRFS_INODE_ITEM_KEY 1
1402 #define BTRFS_INODE_REF_KEY 12
1403 #define BTRFS_XATTR_ITEM_KEY 24
1404 #define BTRFS_ORPHAN_ITEM_KEY 48
1405 /* reserve 2-15 close to the inode for later flexibility */
1408 * dir items are the name -> inode pointers in a directory. There is one
1409 * for every name in a directory.
1411 #define BTRFS_DIR_LOG_ITEM_KEY 60
1412 #define BTRFS_DIR_LOG_INDEX_KEY 72
1413 #define BTRFS_DIR_ITEM_KEY 84
1414 #define BTRFS_DIR_INDEX_KEY 96
1416 * extent data is for file data
1418 #define BTRFS_EXTENT_DATA_KEY 108
1421 * extent csums are stored in a separate tree and hold csums for
1422 * an entire extent on disk.
1424 #define BTRFS_EXTENT_CSUM_KEY 128
1427 * root items point to tree roots. They are typically in the root
1428 * tree used by the super block to find all the other trees
1430 #define BTRFS_ROOT_ITEM_KEY 132
1433 * root backrefs tie subvols and snapshots to the directory entries that
1436 #define BTRFS_ROOT_BACKREF_KEY 144
1439 * root refs make a fast index for listing all of the snapshots and
1440 * subvolumes referenced by a given root. They point directly to the
1441 * directory item in the root that references the subvol
1443 #define BTRFS_ROOT_REF_KEY 156
1446 * extent items are in the extent map tree. These record which blocks
1447 * are used, and how many references there are to each block
1449 #define BTRFS_EXTENT_ITEM_KEY 168
1451 #define BTRFS_TREE_BLOCK_REF_KEY 176
1453 #define BTRFS_EXTENT_DATA_REF_KEY 178
1455 #define BTRFS_EXTENT_REF_V0_KEY 180
1457 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1459 #define BTRFS_SHARED_DATA_REF_KEY 184
1462 * block groups give us hints into the extent allocation trees. Which
1463 * blocks are free etc etc
1465 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1467 #define BTRFS_DEV_EXTENT_KEY 204
1468 #define BTRFS_DEV_ITEM_KEY 216
1469 #define BTRFS_CHUNK_ITEM_KEY 228
1471 #define BTRFS_BALANCE_ITEM_KEY 248
1474 * string items are for debugging. They just store a short string of
1477 #define BTRFS_STRING_ITEM_KEY 253
1480 * Flags for mount options.
1482 * Note: don't forget to add new options to btrfs_show_options()
1484 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1485 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1486 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1487 #define BTRFS_MOUNT_SSD (1 << 3)
1488 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1489 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1490 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1491 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1492 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1493 #define BTRFS_MOUNT_NOSSD (1 << 9)
1494 #define BTRFS_MOUNT_DISCARD (1 << 10)
1495 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1496 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1497 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1498 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1499 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1500 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1501 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1502 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1503 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1504 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1505 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1506 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1508 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1509 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1510 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1515 #define BTRFS_INODE_NODATASUM (1 << 0)
1516 #define BTRFS_INODE_NODATACOW (1 << 1)
1517 #define BTRFS_INODE_READONLY (1 << 2)
1518 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1519 #define BTRFS_INODE_PREALLOC (1 << 4)
1520 #define BTRFS_INODE_SYNC (1 << 5)
1521 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1522 #define BTRFS_INODE_APPEND (1 << 7)
1523 #define BTRFS_INODE_NODUMP (1 << 8)
1524 #define BTRFS_INODE_NOATIME (1 << 9)
1525 #define BTRFS_INODE_DIRSYNC (1 << 10)
1526 #define BTRFS_INODE_COMPRESS (1 << 11)
1528 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1530 /* some macros to generate set/get funcs for the struct fields. This
1531 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1534 #define le8_to_cpu(v) (v)
1535 #define cpu_to_le8(v) (v)
1538 #define read_eb_member(eb, ptr, type, member, result) ( \
1539 read_extent_buffer(eb, (char *)(result), \
1540 ((unsigned long)(ptr)) + \
1541 offsetof(type, member), \
1542 sizeof(((type *)0)->member)))
1544 #define write_eb_member(eb, ptr, type, member, result) ( \
1545 write_extent_buffer(eb, (char *)(result), \
1546 ((unsigned long)(ptr)) + \
1547 offsetof(type, member), \
1548 sizeof(((type *)0)->member)))
1550 #ifndef BTRFS_SETGET_FUNCS
1551 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1552 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1553 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1556 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1557 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1559 type *p = page_address(eb->first_page); \
1560 u##bits res = le##bits##_to_cpu(p->member); \
1563 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1566 type *p = page_address(eb->first_page); \
1567 p->member = cpu_to_le##bits(val); \
1570 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1571 static inline u##bits btrfs_##name(type *s) \
1573 return le##bits##_to_cpu(s->member); \
1575 static inline void btrfs_set_##name(type *s, u##bits val) \
1577 s->member = cpu_to_le##bits(val); \
1580 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1581 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1582 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1583 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1584 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1585 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1587 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1588 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1589 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1590 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1591 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1592 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1595 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1597 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1599 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1601 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1603 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1605 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1615 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1617 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1620 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1622 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1625 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1626 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1627 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1628 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1629 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1630 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1631 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1632 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1633 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1634 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1635 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1637 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1639 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1642 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1644 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1646 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1652 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1657 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1658 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1660 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1663 unsigned long offset = (unsigned long)c;
1664 offset += offsetof(struct btrfs_chunk, stripe);
1665 offset += nr * sizeof(struct btrfs_stripe);
1666 return (struct btrfs_stripe *)offset;
1669 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1671 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1674 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1675 struct btrfs_chunk *c, int nr)
1677 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1680 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1681 struct btrfs_chunk *c, int nr)
1683 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1686 /* struct btrfs_block_group_item */
1687 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1689 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1691 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1692 struct btrfs_block_group_item, chunk_objectid, 64);
1694 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1695 struct btrfs_block_group_item, chunk_objectid, 64);
1696 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1697 struct btrfs_block_group_item, flags, 64);
1698 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1699 struct btrfs_block_group_item, flags, 64);
1701 /* struct btrfs_inode_ref */
1702 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1703 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1705 /* struct btrfs_inode_item */
1706 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1707 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1708 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1709 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1710 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1711 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1712 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1713 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1714 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1715 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1716 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1717 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1719 static inline struct btrfs_timespec *
1720 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1722 unsigned long ptr = (unsigned long)inode_item;
1723 ptr += offsetof(struct btrfs_inode_item, atime);
1724 return (struct btrfs_timespec *)ptr;
1727 static inline struct btrfs_timespec *
1728 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1730 unsigned long ptr = (unsigned long)inode_item;
1731 ptr += offsetof(struct btrfs_inode_item, mtime);
1732 return (struct btrfs_timespec *)ptr;
1735 static inline struct btrfs_timespec *
1736 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1738 unsigned long ptr = (unsigned long)inode_item;
1739 ptr += offsetof(struct btrfs_inode_item, ctime);
1740 return (struct btrfs_timespec *)ptr;
1743 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1744 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1746 /* struct btrfs_dev_extent */
1747 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1749 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1750 chunk_objectid, 64);
1751 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1753 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1755 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1757 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1758 return (u8 *)((unsigned long)dev + ptr);
1761 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1762 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1764 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1766 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1769 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1771 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1772 struct btrfs_tree_block_info *item,
1773 struct btrfs_disk_key *key)
1775 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1778 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1779 struct btrfs_tree_block_info *item,
1780 struct btrfs_disk_key *key)
1782 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1785 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1787 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1789 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1791 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1794 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1797 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1799 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1802 static inline u32 btrfs_extent_inline_ref_size(int type)
1804 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1805 type == BTRFS_SHARED_BLOCK_REF_KEY)
1806 return sizeof(struct btrfs_extent_inline_ref);
1807 if (type == BTRFS_SHARED_DATA_REF_KEY)
1808 return sizeof(struct btrfs_shared_data_ref) +
1809 sizeof(struct btrfs_extent_inline_ref);
1810 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1811 return sizeof(struct btrfs_extent_data_ref) +
1812 offsetof(struct btrfs_extent_inline_ref, offset);
1817 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1818 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1820 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1821 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1823 /* struct btrfs_node */
1824 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1825 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1827 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1830 ptr = offsetof(struct btrfs_node, ptrs) +
1831 sizeof(struct btrfs_key_ptr) * nr;
1832 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1835 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1839 ptr = offsetof(struct btrfs_node, ptrs) +
1840 sizeof(struct btrfs_key_ptr) * nr;
1841 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1844 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1847 ptr = offsetof(struct btrfs_node, ptrs) +
1848 sizeof(struct btrfs_key_ptr) * nr;
1849 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1852 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1856 ptr = offsetof(struct btrfs_node, ptrs) +
1857 sizeof(struct btrfs_key_ptr) * nr;
1858 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1861 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1863 return offsetof(struct btrfs_node, ptrs) +
1864 sizeof(struct btrfs_key_ptr) * nr;
1867 void btrfs_node_key(struct extent_buffer *eb,
1868 struct btrfs_disk_key *disk_key, int nr);
1870 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1871 struct btrfs_disk_key *disk_key, int nr)
1874 ptr = btrfs_node_key_ptr_offset(nr);
1875 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1876 struct btrfs_key_ptr, key, disk_key);
1879 /* struct btrfs_item */
1880 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1881 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1883 static inline unsigned long btrfs_item_nr_offset(int nr)
1885 return offsetof(struct btrfs_leaf, items) +
1886 sizeof(struct btrfs_item) * nr;
1889 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1892 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1895 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1896 struct btrfs_item *item)
1898 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1901 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1903 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1906 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1908 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1911 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1913 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1916 static inline void btrfs_item_key(struct extent_buffer *eb,
1917 struct btrfs_disk_key *disk_key, int nr)
1919 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1920 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1923 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1924 struct btrfs_disk_key *disk_key, int nr)
1926 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1927 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1930 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1933 * struct btrfs_root_ref
1935 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1936 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1937 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1939 /* struct btrfs_dir_item */
1940 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1941 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1942 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1943 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1945 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1946 struct btrfs_dir_item *item,
1947 struct btrfs_disk_key *key)
1949 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1952 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1953 struct btrfs_dir_item *item,
1954 struct btrfs_disk_key *key)
1956 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1959 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1961 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1963 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1966 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1967 struct btrfs_free_space_header *h,
1968 struct btrfs_disk_key *key)
1970 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1973 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1974 struct btrfs_free_space_header *h,
1975 struct btrfs_disk_key *key)
1977 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1980 /* struct btrfs_disk_key */
1981 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1983 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1984 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1986 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1987 struct btrfs_disk_key *disk)
1989 cpu->offset = le64_to_cpu(disk->offset);
1990 cpu->type = disk->type;
1991 cpu->objectid = le64_to_cpu(disk->objectid);
1994 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1995 struct btrfs_key *cpu)
1997 disk->offset = cpu_to_le64(cpu->offset);
1998 disk->type = cpu->type;
1999 disk->objectid = cpu_to_le64(cpu->objectid);
2002 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2003 struct btrfs_key *key, int nr)
2005 struct btrfs_disk_key disk_key;
2006 btrfs_node_key(eb, &disk_key, nr);
2007 btrfs_disk_key_to_cpu(key, &disk_key);
2010 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2011 struct btrfs_key *key, int nr)
2013 struct btrfs_disk_key disk_key;
2014 btrfs_item_key(eb, &disk_key, nr);
2015 btrfs_disk_key_to_cpu(key, &disk_key);
2018 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2019 struct btrfs_dir_item *item,
2020 struct btrfs_key *key)
2022 struct btrfs_disk_key disk_key;
2023 btrfs_dir_item_key(eb, item, &disk_key);
2024 btrfs_disk_key_to_cpu(key, &disk_key);
2028 static inline u8 btrfs_key_type(struct btrfs_key *key)
2033 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2038 /* struct btrfs_header */
2039 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2040 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2042 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2043 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2044 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2045 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2047 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2049 return (btrfs_header_flags(eb) & flag) == flag;
2052 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2054 u64 flags = btrfs_header_flags(eb);
2055 btrfs_set_header_flags(eb, flags | flag);
2056 return (flags & flag) == flag;
2059 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2061 u64 flags = btrfs_header_flags(eb);
2062 btrfs_set_header_flags(eb, flags & ~flag);
2063 return (flags & flag) == flag;
2066 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2068 u64 flags = btrfs_header_flags(eb);
2069 return flags >> BTRFS_BACKREF_REV_SHIFT;
2072 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2075 u64 flags = btrfs_header_flags(eb);
2076 flags &= ~BTRFS_BACKREF_REV_MASK;
2077 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2078 btrfs_set_header_flags(eb, flags);
2081 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2083 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2087 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2089 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2093 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2095 return btrfs_header_level(eb) == 0;
2098 /* struct btrfs_root_item */
2099 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2101 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2102 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2103 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2105 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2107 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2108 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2109 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2110 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2111 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2112 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2113 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2114 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2117 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2119 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
2122 /* struct btrfs_root_backup */
2123 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2128 tree_root_level, 8);
2130 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2132 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2133 chunk_root_gen, 64);
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2135 chunk_root_level, 8);
2137 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2139 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2140 extent_root_gen, 64);
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2142 extent_root_level, 8);
2144 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2146 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2151 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2153 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2158 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2160 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2163 csum_root_level, 8);
2164 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2166 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2168 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2171 /* struct btrfs_balance_item */
2172 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2174 static inline void btrfs_balance_data(struct extent_buffer *eb,
2175 struct btrfs_balance_item *bi,
2176 struct btrfs_disk_balance_args *ba)
2178 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2181 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2182 struct btrfs_balance_item *bi,
2183 struct btrfs_disk_balance_args *ba)
2185 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2188 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2189 struct btrfs_balance_item *bi,
2190 struct btrfs_disk_balance_args *ba)
2192 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2195 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2196 struct btrfs_balance_item *bi,
2197 struct btrfs_disk_balance_args *ba)
2199 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2202 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2203 struct btrfs_balance_item *bi,
2204 struct btrfs_disk_balance_args *ba)
2206 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2209 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2210 struct btrfs_balance_item *bi,
2211 struct btrfs_disk_balance_args *ba)
2213 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2217 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2218 struct btrfs_disk_balance_args *disk)
2220 memset(cpu, 0, sizeof(*cpu));
2222 cpu->profiles = le64_to_cpu(disk->profiles);
2223 cpu->usage = le64_to_cpu(disk->usage);
2224 cpu->devid = le64_to_cpu(disk->devid);
2225 cpu->pstart = le64_to_cpu(disk->pstart);
2226 cpu->pend = le64_to_cpu(disk->pend);
2227 cpu->vstart = le64_to_cpu(disk->vstart);
2228 cpu->vend = le64_to_cpu(disk->vend);
2229 cpu->target = le64_to_cpu(disk->target);
2230 cpu->flags = le64_to_cpu(disk->flags);
2234 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2235 struct btrfs_balance_args *cpu)
2237 memset(disk, 0, sizeof(*disk));
2239 disk->profiles = cpu_to_le64(cpu->profiles);
2240 disk->usage = cpu_to_le64(cpu->usage);
2241 disk->devid = cpu_to_le64(cpu->devid);
2242 disk->pstart = cpu_to_le64(cpu->pstart);
2243 disk->pend = cpu_to_le64(cpu->pend);
2244 disk->vstart = cpu_to_le64(cpu->vstart);
2245 disk->vend = cpu_to_le64(cpu->vend);
2246 disk->target = cpu_to_le64(cpu->target);
2247 disk->flags = cpu_to_le64(cpu->flags);
2250 /* struct btrfs_super_block */
2251 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2253 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2255 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2256 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2257 struct btrfs_super_block, sys_chunk_array_size, 32);
2258 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2259 struct btrfs_super_block, chunk_root_generation, 64);
2260 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2262 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2264 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2265 chunk_root_level, 8);
2266 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2268 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2269 log_root_transid, 64);
2270 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2272 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2274 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2276 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2278 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2280 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2282 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2284 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2285 root_dir_objectid, 64);
2286 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2288 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2290 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2291 compat_ro_flags, 64);
2292 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2293 incompat_flags, 64);
2294 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2296 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2297 cache_generation, 64);
2299 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2301 int t = btrfs_super_csum_type(s);
2302 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2303 return btrfs_csum_sizes[t];
2306 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2308 return offsetof(struct btrfs_leaf, items);
2311 /* struct btrfs_file_extent_item */
2312 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2314 static inline unsigned long
2315 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2317 unsigned long offset = (unsigned long)e;
2318 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2322 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2324 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2327 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2329 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2331 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2332 disk_num_bytes, 64);
2333 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2335 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2337 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2339 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2341 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2343 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2344 other_encoding, 16);
2346 /* this returns the number of file bytes represented by the inline item.
2347 * If an item is compressed, this is the uncompressed size
2349 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2350 struct btrfs_file_extent_item *e)
2352 return btrfs_file_extent_ram_bytes(eb, e);
2356 * this returns the number of bytes used by the item on disk, minus the
2357 * size of any extent headers. If a file is compressed on disk, this is
2358 * the compressed size
2360 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2361 struct btrfs_item *e)
2363 unsigned long offset;
2364 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2365 return btrfs_item_size(eb, e) - offset;
2368 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2370 return sb->s_fs_info;
2373 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2376 return root->leafsize;
2377 return root->nodesize;
2380 /* helper function to cast into the data area of the leaf. */
2381 #define btrfs_item_ptr(leaf, slot, type) \
2382 ((type *)(btrfs_leaf_data(leaf) + \
2383 btrfs_item_offset_nr(leaf, slot)))
2385 #define btrfs_item_ptr_offset(leaf, slot) \
2386 ((unsigned long)(btrfs_leaf_data(leaf) + \
2387 btrfs_item_offset_nr(leaf, slot)))
2389 static inline struct dentry *fdentry(struct file *file)
2391 return file->f_path.dentry;
2394 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2396 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2397 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2400 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2402 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2406 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2409 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2414 * Doing a truncate won't result in new nodes or leaves, just what we need for
2417 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2420 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2424 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2425 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root, unsigned long count);
2427 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2428 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2429 struct btrfs_root *root, u64 bytenr,
2430 u64 num_bytes, u64 *refs, u64 *flags);
2431 int btrfs_pin_extent(struct btrfs_root *root,
2432 u64 bytenr, u64 num, int reserved);
2433 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2434 struct btrfs_root *root,
2435 u64 bytenr, u64 num_bytes);
2436 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *root,
2438 u64 objectid, u64 offset, u64 bytenr);
2439 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2440 struct btrfs_fs_info *info,
2442 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2443 u64 btrfs_find_block_group(struct btrfs_root *root,
2444 u64 search_start, u64 search_hint, int owner);
2445 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2446 struct btrfs_root *root, u32 blocksize,
2447 u64 parent, u64 root_objectid,
2448 struct btrfs_disk_key *key, int level,
2449 u64 hint, u64 empty_size, int for_cow);
2450 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2451 struct btrfs_root *root,
2452 struct extent_buffer *buf,
2453 u64 parent, int last_ref, int for_cow);
2454 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2455 struct btrfs_root *root,
2456 u64 bytenr, u32 blocksize,
2458 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2459 struct btrfs_root *root,
2460 u64 root_objectid, u64 owner,
2461 u64 offset, struct btrfs_key *ins);
2462 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2463 struct btrfs_root *root,
2464 u64 root_objectid, u64 owner, u64 offset,
2465 struct btrfs_key *ins);
2466 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2467 struct btrfs_root *root,
2468 u64 num_bytes, u64 min_alloc_size,
2469 u64 empty_size, u64 hint_byte,
2470 u64 search_end, struct btrfs_key *ins,
2472 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2473 struct extent_buffer *buf, int full_backref, int for_cow);
2474 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2475 struct extent_buffer *buf, int full_backref, int for_cow);
2476 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2477 struct btrfs_root *root,
2478 u64 bytenr, u64 num_bytes, u64 flags,
2480 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2483 u64 owner, u64 offset, int for_cow);
2485 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2486 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2487 u64 start, u64 len);
2488 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2489 struct btrfs_root *root);
2490 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root);
2492 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root,
2494 u64 bytenr, u64 num_bytes, u64 parent,
2495 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2497 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root);
2499 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2500 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2501 int btrfs_read_block_groups(struct btrfs_root *root);
2502 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2503 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2504 struct btrfs_root *root, u64 bytes_used,
2505 u64 type, u64 chunk_objectid, u64 chunk_offset,
2507 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root, u64 group_start);
2509 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2510 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2511 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2512 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2513 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2514 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2515 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *root);
2517 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2518 struct inode *inode);
2519 void btrfs_orphan_release_metadata(struct inode *inode);
2520 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2521 struct btrfs_pending_snapshot *pending);
2522 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2523 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2524 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2525 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2526 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2527 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2528 void btrfs_free_block_rsv(struct btrfs_root *root,
2529 struct btrfs_block_rsv *rsv);
2530 int btrfs_block_rsv_add(struct btrfs_root *root,
2531 struct btrfs_block_rsv *block_rsv,
2533 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2534 struct btrfs_block_rsv *block_rsv,
2536 int btrfs_block_rsv_check(struct btrfs_root *root,
2537 struct btrfs_block_rsv *block_rsv, int min_factor);
2538 int btrfs_block_rsv_refill(struct btrfs_root *root,
2539 struct btrfs_block_rsv *block_rsv,
2541 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2542 struct btrfs_block_rsv *block_rsv,
2544 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2545 struct btrfs_block_rsv *dst_rsv,
2547 void btrfs_block_rsv_release(struct btrfs_root *root,
2548 struct btrfs_block_rsv *block_rsv,
2550 int btrfs_set_block_group_ro(struct btrfs_root *root,
2551 struct btrfs_block_group_cache *cache);
2552 void btrfs_set_block_group_rw(struct btrfs_root *root,
2553 struct btrfs_block_group_cache *cache);
2554 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2555 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2556 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2557 u64 start, u64 end);
2558 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2559 u64 num_bytes, u64 *actual_bytes);
2560 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root, u64 type);
2562 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2564 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2566 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2567 int level, int *slot);
2568 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2569 int btrfs_previous_item(struct btrfs_root *root,
2570 struct btrfs_path *path, u64 min_objectid,
2572 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2573 struct btrfs_root *root, struct btrfs_path *path,
2574 struct btrfs_key *new_key);
2575 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2576 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2577 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2578 struct btrfs_key *key, int lowest_level,
2579 int cache_only, u64 min_trans);
2580 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2581 struct btrfs_key *max_key,
2582 struct btrfs_path *path, int cache_only,
2584 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2585 struct btrfs_root *root, struct extent_buffer *buf,
2586 struct extent_buffer *parent, int parent_slot,
2587 struct extent_buffer **cow_ret);
2588 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root,
2590 struct extent_buffer *buf,
2591 struct extent_buffer **cow_ret, u64 new_root_objectid);
2592 int btrfs_block_can_be_shared(struct btrfs_root *root,
2593 struct extent_buffer *buf);
2594 void btrfs_extend_item(struct btrfs_trans_handle *trans,
2595 struct btrfs_root *root, struct btrfs_path *path,
2597 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root,
2599 struct btrfs_path *path,
2600 u32 new_size, int from_end);
2601 int btrfs_split_item(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root,
2603 struct btrfs_path *path,
2604 struct btrfs_key *new_key,
2605 unsigned long split_offset);
2606 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root,
2608 struct btrfs_path *path,
2609 struct btrfs_key *new_key);
2610 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2611 *root, struct btrfs_key *key, struct btrfs_path *p, int
2613 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2614 struct btrfs_root *root, struct extent_buffer *parent,
2615 int start_slot, int cache_only, u64 *last_ret,
2616 struct btrfs_key *progress);
2617 void btrfs_release_path(struct btrfs_path *p);
2618 struct btrfs_path *btrfs_alloc_path(void);
2619 void btrfs_free_path(struct btrfs_path *p);
2620 void btrfs_set_path_blocking(struct btrfs_path *p);
2621 void btrfs_clear_path_blocking(struct btrfs_path *p,
2622 struct extent_buffer *held, int held_rw);
2623 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2625 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2626 struct btrfs_path *path, int slot, int nr);
2627 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2628 struct btrfs_root *root,
2629 struct btrfs_path *path)
2631 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2634 void setup_items_for_insert(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root, struct btrfs_path *path,
2636 struct btrfs_key *cpu_key, u32 *data_size,
2637 u32 total_data, u32 total_size, int nr);
2638 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2639 *root, struct btrfs_key *key, void *data, u32 data_size);
2640 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root,
2642 struct btrfs_path *path,
2643 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2645 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2646 struct btrfs_root *root,
2647 struct btrfs_path *path,
2648 struct btrfs_key *key,
2651 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2654 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2655 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2658 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2659 return btrfs_next_leaf(root, p);
2662 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2663 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2664 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2665 struct btrfs_block_rsv *block_rsv,
2666 int update_ref, int for_reloc);
2667 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2668 struct btrfs_root *root,
2669 struct extent_buffer *node,
2670 struct extent_buffer *parent);
2671 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2674 * Get synced with close_ctree()
2677 return fs_info->closing;
2679 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2681 kfree(fs_info->balance_ctl);
2682 kfree(fs_info->delayed_root);
2683 kfree(fs_info->extent_root);
2684 kfree(fs_info->tree_root);
2685 kfree(fs_info->chunk_root);
2686 kfree(fs_info->dev_root);
2687 kfree(fs_info->csum_root);
2688 kfree(fs_info->super_copy);
2689 kfree(fs_info->super_for_commit);
2693 * profile_is_valid - tests whether a given profile is valid and reduced
2694 * @flags: profile to validate
2695 * @extended: if true @flags is treated as an extended profile
2697 static inline int profile_is_valid(u64 flags, int extended)
2699 u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK;
2701 flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
2703 mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
2707 /* true if zero or exactly one bit set */
2708 return (flags & (~flags + 1)) == flags;
2712 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2713 struct btrfs_path *path,
2714 u64 root_id, u64 ref_id);
2715 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2716 struct btrfs_root *tree_root,
2717 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2718 const char *name, int name_len);
2719 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *tree_root,
2721 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2722 const char *name, int name_len);
2723 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2724 struct btrfs_key *key);
2725 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2726 *root, struct btrfs_key *key, struct btrfs_root_item
2728 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2729 struct btrfs_root *root,
2730 struct btrfs_key *key,
2731 struct btrfs_root_item *item);
2732 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2733 btrfs_root_item *item, struct btrfs_key *key);
2734 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2735 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2736 void btrfs_set_root_node(struct btrfs_root_item *item,
2737 struct extent_buffer *node);
2738 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2741 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, const char *name,
2743 int name_len, struct inode *dir,
2744 struct btrfs_key *location, u8 type, u64 index);
2745 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2746 struct btrfs_root *root,
2747 struct btrfs_path *path, u64 dir,
2748 const char *name, int name_len,
2750 struct btrfs_dir_item *
2751 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root,
2753 struct btrfs_path *path, u64 dir,
2754 u64 objectid, const char *name, int name_len,
2756 struct btrfs_dir_item *
2757 btrfs_search_dir_index_item(struct btrfs_root *root,
2758 struct btrfs_path *path, u64 dirid,
2759 const char *name, int name_len);
2760 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2761 struct btrfs_path *path,
2762 const char *name, int name_len);
2763 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2764 struct btrfs_root *root,
2765 struct btrfs_path *path,
2766 struct btrfs_dir_item *di);
2767 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2768 struct btrfs_root *root,
2769 struct btrfs_path *path, u64 objectid,
2770 const char *name, u16 name_len,
2771 const void *data, u16 data_len);
2772 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2773 struct btrfs_root *root,
2774 struct btrfs_path *path, u64 dir,
2775 const char *name, u16 name_len,
2777 int verify_dir_item(struct btrfs_root *root,
2778 struct extent_buffer *leaf,
2779 struct btrfs_dir_item *dir_item);
2782 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2783 struct btrfs_root *root, u64 offset);
2784 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root, u64 offset);
2786 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2789 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root,
2791 const char *name, int name_len,
2792 u64 inode_objectid, u64 ref_objectid, u64 index);
2793 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 const char *name, int name_len,
2796 u64 inode_objectid, u64 ref_objectid, u64 *index);
2797 struct btrfs_inode_ref *
2798 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2799 struct btrfs_root *root,
2800 struct btrfs_path *path,
2801 const char *name, int name_len,
2802 u64 inode_objectid, u64 ref_objectid, int mod);
2803 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2804 struct btrfs_root *root,
2805 struct btrfs_path *path, u64 objectid);
2806 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2807 *root, struct btrfs_path *path,
2808 struct btrfs_key *location, int mod);
2811 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2812 struct btrfs_root *root, u64 bytenr, u64 len);
2813 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2814 struct bio *bio, u32 *dst);
2815 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2816 struct bio *bio, u64 logical_offset, u32 *dst);
2817 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2818 struct btrfs_root *root,
2819 u64 objectid, u64 pos,
2820 u64 disk_offset, u64 disk_num_bytes,
2821 u64 num_bytes, u64 offset, u64 ram_bytes,
2822 u8 compression, u8 encryption, u16 other_encoding);
2823 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2824 struct btrfs_root *root,
2825 struct btrfs_path *path, u64 objectid,
2826 u64 bytenr, int mod);
2827 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2828 struct btrfs_root *root,
2829 struct btrfs_ordered_sum *sums);
2830 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2831 struct bio *bio, u64 file_start, int contig);
2832 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2833 struct btrfs_root *root,
2834 struct btrfs_path *path,
2835 u64 bytenr, int cow);
2836 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2837 struct btrfs_root *root, struct btrfs_path *path,
2839 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2840 struct list_head *list, int search_commit);
2842 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2843 size_t pg_offset, u64 start, u64 len,
2846 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2847 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2848 #define ClearPageChecked ClearPageFsMisc
2849 #define SetPageChecked SetPageFsMisc
2850 #define PageChecked PageFsMisc
2853 /* This forces readahead on a given range of bytes in an inode */
2854 static inline void btrfs_force_ra(struct address_space *mapping,
2855 struct file_ra_state *ra, struct file *file,
2856 pgoff_t offset, unsigned long req_size)
2858 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2861 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2862 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2863 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2864 struct btrfs_root *root,
2865 struct inode *dir, struct inode *inode,
2866 const char *name, int name_len);
2867 int btrfs_add_link(struct btrfs_trans_handle *trans,
2868 struct inode *parent_inode, struct inode *inode,
2869 const char *name, int name_len, int add_backref, u64 index);
2870 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct inode *dir, u64 objectid,
2873 const char *name, int name_len);
2874 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2875 struct btrfs_root *root,
2876 struct inode *inode, u64 new_size,
2879 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2880 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2881 struct extent_state **cached_state);
2882 int btrfs_writepages(struct address_space *mapping,
2883 struct writeback_control *wbc);
2884 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2885 struct btrfs_root *new_root, u64 new_dirid);
2886 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2887 size_t size, struct bio *bio, unsigned long bio_flags);
2889 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2890 int btrfs_readpage(struct file *file, struct page *page);
2891 void btrfs_evict_inode(struct inode *inode);
2892 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2893 int btrfs_dirty_inode(struct inode *inode);
2894 int btrfs_update_time(struct file *file);
2895 struct inode *btrfs_alloc_inode(struct super_block *sb);
2896 void btrfs_destroy_inode(struct inode *inode);
2897 int btrfs_drop_inode(struct inode *inode);
2898 int btrfs_init_cachep(void);
2899 void btrfs_destroy_cachep(void);
2900 long btrfs_ioctl_trans_end(struct file *file);
2901 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2902 struct btrfs_root *root, int *was_new);
2903 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2904 size_t pg_offset, u64 start, u64 end,
2906 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2907 struct btrfs_root *root,
2908 struct inode *inode);
2909 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2910 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2911 int btrfs_orphan_cleanup(struct btrfs_root *root);
2912 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root);
2914 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2915 void btrfs_invalidate_inodes(struct btrfs_root *root);
2916 void btrfs_add_delayed_iput(struct inode *inode);
2917 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2918 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2919 u64 start, u64 num_bytes, u64 min_size,
2920 loff_t actual_len, u64 *alloc_hint);
2921 int btrfs_prealloc_file_range_trans(struct inode *inode,
2922 struct btrfs_trans_handle *trans, int mode,
2923 u64 start, u64 num_bytes, u64 min_size,
2924 loff_t actual_len, u64 *alloc_hint);
2925 extern const struct dentry_operations btrfs_dentry_operations;
2928 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2929 void btrfs_update_iflags(struct inode *inode);
2930 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2931 int btrfs_defrag_file(struct inode *inode, struct file *file,
2932 struct btrfs_ioctl_defrag_range_args *range,
2933 u64 newer_than, unsigned long max_pages);
2935 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2936 struct inode *inode);
2937 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2938 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2939 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2941 extern const struct file_operations btrfs_file_operations;
2942 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2943 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2944 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2945 struct inode *inode, u64 start, u64 end);
2946 int btrfs_release_file(struct inode *inode, struct file *file);
2947 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2948 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2949 struct page **pages, size_t num_pages,
2950 loff_t pos, size_t write_bytes,
2951 struct extent_state **cached);
2954 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2955 struct btrfs_root *root, int cache_only);
2958 int btrfs_init_sysfs(void);
2959 void btrfs_exit_sysfs(void);
2962 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2965 int btrfs_parse_options(struct btrfs_root *root, char *options);
2966 int btrfs_sync_fs(struct super_block *sb, int wait);
2967 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
2968 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2969 unsigned int line, int errno, const char *fmt, ...);
2971 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
2972 struct btrfs_root *root, const char *function,
2973 unsigned int line, int errno);
2975 #define btrfs_abort_transaction(trans, root, errno) \
2977 __btrfs_abort_transaction(trans, root, __func__, \
2981 #define btrfs_std_error(fs_info, errno) \
2984 __btrfs_std_error((fs_info), __func__, \
2985 __LINE__, (errno), NULL); \
2988 #define btrfs_error(fs_info, errno, fmt, args...) \
2990 __btrfs_std_error((fs_info), __func__, __LINE__, \
2991 (errno), fmt, ##args); \
2994 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
2995 unsigned int line, int errno, const char *fmt, ...);
2997 #define btrfs_panic(fs_info, errno, fmt, args...) \
2999 struct btrfs_fs_info *_i = (fs_info); \
3000 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3001 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3005 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3006 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3007 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3008 struct inode *inode, struct inode *dir);
3009 int btrfs_acl_chmod(struct inode *inode);
3011 #define btrfs_get_acl NULL
3012 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3013 struct inode *inode, struct inode *dir)
3017 static inline int btrfs_acl_chmod(struct inode *inode)
3024 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3025 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root);
3027 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3028 struct btrfs_root *root);
3029 int btrfs_recover_relocation(struct btrfs_root *root);
3030 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3031 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3032 struct btrfs_root *root, struct extent_buffer *buf,
3033 struct extent_buffer *cow);
3034 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3035 struct btrfs_pending_snapshot *pending,
3036 u64 *bytes_to_reserve);
3037 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3038 struct btrfs_pending_snapshot *pending);
3041 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3042 struct btrfs_scrub_progress *progress, int readonly);
3043 void btrfs_scrub_pause(struct btrfs_root *root);
3044 void btrfs_scrub_pause_super(struct btrfs_root *root);
3045 void btrfs_scrub_continue(struct btrfs_root *root);
3046 void btrfs_scrub_continue_super(struct btrfs_root *root);
3047 int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
3048 int btrfs_scrub_cancel(struct btrfs_root *root);
3049 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3050 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3051 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3052 struct btrfs_scrub_progress *progress);
3055 struct reada_control {
3056 struct btrfs_root *root; /* tree to prefetch */
3057 struct btrfs_key key_start;
3058 struct btrfs_key key_end; /* exclusive */
3061 wait_queue_head_t wait;
3063 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3064 struct btrfs_key *start, struct btrfs_key *end);
3065 int btrfs_reada_wait(void *handle);
3066 void btrfs_reada_detach(void *handle);
3067 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3068 u64 start, int err);