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 * the max metadata block size. This limit is somewhat artificial,
142 * but the memmove costs go through the roof for larger blocks.
144 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
147 * we can actually store much bigger names, but lets not confuse the rest
150 #define BTRFS_NAME_LEN 255
152 /* 32 bytes in various csum fields */
153 #define BTRFS_CSUM_SIZE 32
156 #define BTRFS_CSUM_TYPE_CRC32 0
158 static int btrfs_csum_sizes[] = { 4, 0 };
160 /* four bytes for CRC32 */
161 #define BTRFS_EMPTY_DIR_SIZE 0
163 #define BTRFS_FT_UNKNOWN 0
164 #define BTRFS_FT_REG_FILE 1
165 #define BTRFS_FT_DIR 2
166 #define BTRFS_FT_CHRDEV 3
167 #define BTRFS_FT_BLKDEV 4
168 #define BTRFS_FT_FIFO 5
169 #define BTRFS_FT_SOCK 6
170 #define BTRFS_FT_SYMLINK 7
171 #define BTRFS_FT_XATTR 8
172 #define BTRFS_FT_MAX 9
175 * The key defines the order in the tree, and so it also defines (optimal)
178 * objectid corresponds to the inode number.
180 * type tells us things about the object, and is a kind of stream selector.
181 * so for a given inode, keys with type of 1 might refer to the inode data,
182 * type of 2 may point to file data in the btree and type == 3 may point to
185 * offset is the starting byte offset for this key in the stream.
187 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
188 * in cpu native order. Otherwise they are identical and their sizes
189 * should be the same (ie both packed)
191 struct btrfs_disk_key {
195 } __attribute__ ((__packed__));
201 } __attribute__ ((__packed__));
203 struct btrfs_mapping_tree {
204 struct extent_map_tree map_tree;
207 struct btrfs_dev_item {
208 /* the internal btrfs device id */
211 /* size of the device */
217 /* optimal io alignment for this device */
220 /* optimal io width for this device */
223 /* minimal io size for this device */
226 /* type and info about this device */
229 /* expected generation for this device */
233 * starting byte of this partition on the device,
234 * to allow for stripe alignment in the future
238 /* grouping information for allocation decisions */
241 /* seek speed 0-100 where 100 is fastest */
244 /* bandwidth 0-100 where 100 is fastest */
247 /* btrfs generated uuid for this device */
248 u8 uuid[BTRFS_UUID_SIZE];
250 /* uuid of FS who owns this device */
251 u8 fsid[BTRFS_UUID_SIZE];
252 } __attribute__ ((__packed__));
254 struct btrfs_stripe {
257 u8 dev_uuid[BTRFS_UUID_SIZE];
258 } __attribute__ ((__packed__));
261 /* size of this chunk in bytes */
264 /* objectid of the root referencing this chunk */
270 /* optimal io alignment for this chunk */
273 /* optimal io width for this chunk */
276 /* minimal io size for this chunk */
279 /* 2^16 stripes is quite a lot, a second limit is the size of a single
284 /* sub stripes only matter for raid10 */
286 struct btrfs_stripe stripe;
287 /* additional stripes go here */
288 } __attribute__ ((__packed__));
290 #define BTRFS_FREE_SPACE_EXTENT 1
291 #define BTRFS_FREE_SPACE_BITMAP 2
293 struct btrfs_free_space_entry {
297 } __attribute__ ((__packed__));
299 struct btrfs_free_space_header {
300 struct btrfs_disk_key location;
304 } __attribute__ ((__packed__));
306 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
308 BUG_ON(num_stripes == 0);
309 return sizeof(struct btrfs_chunk) +
310 sizeof(struct btrfs_stripe) * (num_stripes - 1);
313 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
314 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
320 /* Errors detected */
321 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
323 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
324 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
326 #define BTRFS_BACKREF_REV_MAX 256
327 #define BTRFS_BACKREF_REV_SHIFT 56
328 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
329 BTRFS_BACKREF_REV_SHIFT)
331 #define BTRFS_OLD_BACKREF_REV 0
332 #define BTRFS_MIXED_BACKREF_REV 1
335 * every tree block (leaf or node) starts with this header.
337 struct btrfs_header {
338 /* these first four must match the super block */
339 u8 csum[BTRFS_CSUM_SIZE];
340 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
341 __le64 bytenr; /* which block this node is supposed to live in */
344 /* allowed to be different from the super from here on down */
345 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
350 } __attribute__ ((__packed__));
352 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
353 sizeof(struct btrfs_header)) / \
354 sizeof(struct btrfs_key_ptr))
355 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
356 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
357 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
358 sizeof(struct btrfs_item) - \
359 sizeof(struct btrfs_file_extent_item))
360 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
361 sizeof(struct btrfs_item) -\
362 sizeof(struct btrfs_dir_item))
366 * this is a very generous portion of the super block, giving us
367 * room to translate 14 chunks with 3 stripes each.
369 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
370 #define BTRFS_LABEL_SIZE 256
373 * just in case we somehow lose the roots and are not able to mount,
374 * we store an array of the roots from previous transactions
377 #define BTRFS_NUM_BACKUP_ROOTS 4
378 struct btrfs_root_backup {
380 __le64 tree_root_gen;
383 __le64 chunk_root_gen;
386 __le64 extent_root_gen;
395 __le64 csum_root_gen;
405 u8 extent_root_level;
409 /* future and to align */
411 } __attribute__ ((__packed__));
414 * the super block basically lists the main trees of the FS
415 * it currently lacks any block count etc etc
417 struct btrfs_super_block {
418 u8 csum[BTRFS_CSUM_SIZE];
419 /* the first 4 fields must match struct btrfs_header */
420 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
421 __le64 bytenr; /* this block number */
424 /* allowed to be different from the btrfs_header from here own down */
431 /* this will help find the new super based on the log root */
432 __le64 log_root_transid;
435 __le64 root_dir_objectid;
441 __le32 sys_chunk_array_size;
442 __le64 chunk_root_generation;
444 __le64 compat_ro_flags;
445 __le64 incompat_flags;
450 struct btrfs_dev_item dev_item;
452 char label[BTRFS_LABEL_SIZE];
454 __le64 cache_generation;
456 /* future expansion */
458 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
459 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
460 } __attribute__ ((__packed__));
463 * Compat flags that we support. If any incompat flags are set other than the
464 * ones specified below then we will fail to mount
466 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
467 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
468 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
469 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
471 * some patches floated around with a second compression method
472 * lets save that incompat here for when they do get in
473 * Note we don't actually support it, we're just reserving the
476 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
479 * older kernels tried to do bigger metadata blocks, but the
480 * code was pretty buggy. Lets not let them try anymore.
482 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
484 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
485 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
486 #define BTRFS_FEATURE_INCOMPAT_SUPP \
487 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
488 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
489 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
490 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
491 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
494 * A leaf is full of items. offset and size tell us where to find
495 * the item in the leaf (relative to the start of the data area)
498 struct btrfs_disk_key key;
501 } __attribute__ ((__packed__));
504 * leaves have an item area and a data area:
505 * [item0, item1....itemN] [free space] [dataN...data1, data0]
507 * The data is separate from the items to get the keys closer together
511 struct btrfs_header header;
512 struct btrfs_item items[];
513 } __attribute__ ((__packed__));
516 * all non-leaf blocks are nodes, they hold only keys and pointers to
519 struct btrfs_key_ptr {
520 struct btrfs_disk_key key;
523 } __attribute__ ((__packed__));
526 struct btrfs_header header;
527 struct btrfs_key_ptr ptrs[];
528 } __attribute__ ((__packed__));
531 * btrfs_paths remember the path taken from the root down to the leaf.
532 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
533 * to any other levels that are present.
535 * The slots array records the index of the item or block pointer
536 * used while walking the tree.
539 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
540 int slots[BTRFS_MAX_LEVEL];
541 /* if there is real range locking, this locks field will change */
542 int locks[BTRFS_MAX_LEVEL];
544 /* keep some upper locks as we walk down */
548 * set by btrfs_split_item, tells search_slot to keep all locks
549 * and to force calls to keep space in the nodes
551 unsigned int search_for_split:1;
552 unsigned int keep_locks:1;
553 unsigned int skip_locking:1;
554 unsigned int leave_spinning:1;
555 unsigned int search_commit_root:1;
559 * items in the extent btree are used to record the objectid of the
560 * owner of the block and the number of references
563 struct btrfs_extent_item {
567 } __attribute__ ((__packed__));
569 struct btrfs_extent_item_v0 {
571 } __attribute__ ((__packed__));
573 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
574 sizeof(struct btrfs_item))
576 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
577 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
579 /* following flags only apply to tree blocks */
581 /* use full backrefs for extent pointers in the block */
582 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
585 * this flag is only used internally by scrub and may be changed at any time
586 * it is only declared here to avoid collisions
588 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
590 struct btrfs_tree_block_info {
591 struct btrfs_disk_key key;
593 } __attribute__ ((__packed__));
595 struct btrfs_extent_data_ref {
600 } __attribute__ ((__packed__));
602 struct btrfs_shared_data_ref {
604 } __attribute__ ((__packed__));
606 struct btrfs_extent_inline_ref {
609 } __attribute__ ((__packed__));
611 /* old style backrefs item */
612 struct btrfs_extent_ref_v0 {
617 } __attribute__ ((__packed__));
620 /* dev extents record free space on individual devices. The owner
621 * field points back to the chunk allocation mapping tree that allocated
622 * the extent. The chunk tree uuid field is a way to double check the owner
624 struct btrfs_dev_extent {
626 __le64 chunk_objectid;
629 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
630 } __attribute__ ((__packed__));
632 struct btrfs_inode_ref {
636 } __attribute__ ((__packed__));
638 struct btrfs_timespec {
641 } __attribute__ ((__packed__));
643 enum btrfs_compression_type {
644 BTRFS_COMPRESS_NONE = 0,
645 BTRFS_COMPRESS_ZLIB = 1,
646 BTRFS_COMPRESS_LZO = 2,
647 BTRFS_COMPRESS_TYPES = 2,
648 BTRFS_COMPRESS_LAST = 3,
651 struct btrfs_inode_item {
652 /* nfs style generation number */
654 /* transid that last touched this inode */
666 /* modification sequence number for NFS */
670 * a little future expansion, for more than this we can
671 * just grow the inode item and version it
674 struct btrfs_timespec atime;
675 struct btrfs_timespec ctime;
676 struct btrfs_timespec mtime;
677 struct btrfs_timespec otime;
678 } __attribute__ ((__packed__));
680 struct btrfs_dir_log_item {
682 } __attribute__ ((__packed__));
684 struct btrfs_dir_item {
685 struct btrfs_disk_key location;
690 } __attribute__ ((__packed__));
692 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
694 struct btrfs_root_item {
695 struct btrfs_inode_item inode;
701 __le64 last_snapshot;
704 struct btrfs_disk_key drop_progress;
707 } __attribute__ ((__packed__));
710 * this is used for both forward and backward root refs
712 struct btrfs_root_ref {
716 } __attribute__ ((__packed__));
718 struct btrfs_disk_balance_args {
720 * profiles to operate on, single is denoted by
721 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
731 /* devid subset filter [pstart..pend) */
735 /* btrfs virtual address space subset filter [vstart..vend) */
740 * profile to convert to, single is denoted by
741 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
745 /* BTRFS_BALANCE_ARGS_* */
749 } __attribute__ ((__packed__));
752 * store balance parameters to disk so that balance can be properly
753 * resumed after crash or unmount
755 struct btrfs_balance_item {
756 /* BTRFS_BALANCE_* */
759 struct btrfs_disk_balance_args data;
760 struct btrfs_disk_balance_args meta;
761 struct btrfs_disk_balance_args sys;
764 } __attribute__ ((__packed__));
766 #define BTRFS_FILE_EXTENT_INLINE 0
767 #define BTRFS_FILE_EXTENT_REG 1
768 #define BTRFS_FILE_EXTENT_PREALLOC 2
770 struct btrfs_file_extent_item {
772 * transaction id that created this extent
776 * max number of bytes to hold this extent in ram
777 * when we split a compressed extent we can't know how big
778 * each of the resulting pieces will be. So, this is
779 * an upper limit on the size of the extent in ram instead of
785 * 32 bits for the various ways we might encode the data,
786 * including compression and encryption. If any of these
787 * are set to something a given disk format doesn't understand
788 * it is treated like an incompat flag for reading and writing,
793 __le16 other_encoding; /* spare for later use */
795 /* are we inline data or a real extent? */
799 * disk space consumed by the extent, checksum blocks are included
803 __le64 disk_num_bytes;
805 * the logical offset in file blocks (no csums)
806 * this extent record is for. This allows a file extent to point
807 * into the middle of an existing extent on disk, sharing it
808 * between two snapshots (useful if some bytes in the middle of the
809 * extent have changed
813 * the logical number of file blocks (no csums included). This
814 * always reflects the size uncompressed and without encoding.
818 } __attribute__ ((__packed__));
820 struct btrfs_csum_item {
822 } __attribute__ ((__packed__));
824 /* different types of block groups (and chunks) */
825 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
826 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
827 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
828 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
829 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
830 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
831 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
832 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
833 #define BTRFS_NR_RAID_TYPES 5
835 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
836 BTRFS_BLOCK_GROUP_SYSTEM | \
837 BTRFS_BLOCK_GROUP_METADATA)
839 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
840 BTRFS_BLOCK_GROUP_RAID1 | \
841 BTRFS_BLOCK_GROUP_DUP | \
842 BTRFS_BLOCK_GROUP_RAID10)
844 * We need a bit for restriper to be able to tell when chunks of type
845 * SINGLE are available. This "extended" profile format is used in
846 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
847 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
848 * to avoid remappings between two formats in future.
850 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
852 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
853 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
855 static inline u64 chunk_to_extended(u64 flags)
857 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
858 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
862 static inline u64 extended_to_chunk(u64 flags)
864 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
867 struct btrfs_block_group_item {
869 __le64 chunk_objectid;
871 } __attribute__ ((__packed__));
873 struct btrfs_space_info {
876 u64 total_bytes; /* total bytes in the space,
877 this doesn't take mirrors into account */
878 u64 bytes_used; /* total bytes used,
879 this doesn't take mirrors into account */
880 u64 bytes_pinned; /* total bytes pinned, will be freed when the
881 transaction finishes */
882 u64 bytes_reserved; /* total bytes the allocator has reserved for
883 current allocations */
884 u64 bytes_readonly; /* total bytes that are read only */
886 u64 bytes_may_use; /* number of bytes that may be used for
887 delalloc/allocations */
888 u64 disk_used; /* total bytes used on disk */
889 u64 disk_total; /* total bytes on disk, takes mirrors into
893 * we bump reservation progress every time we decrement
894 * bytes_reserved. This way people waiting for reservations
895 * know something good has happened and they can check
896 * for progress. The number here isn't to be trusted, it
897 * just shows reclaim activity
899 unsigned long reservation_progress;
901 unsigned int full:1; /* indicates that we cannot allocate any more
902 chunks for this space */
903 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
905 unsigned int flush:1; /* set if we are trying to make space */
907 unsigned int force_alloc; /* set if we need to force a chunk
908 alloc for this space */
910 struct list_head list;
912 /* for block groups in our same type */
913 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
915 struct rw_semaphore groups_sem;
916 wait_queue_head_t wait;
919 struct btrfs_block_rsv {
922 struct btrfs_space_info *space_info;
928 * free clusters are used to claim free space in relatively large chunks,
929 * allowing us to do less seeky writes. They are used for all metadata
930 * allocations and data allocations in ssd mode.
932 struct btrfs_free_cluster {
934 spinlock_t refill_lock;
937 /* largest extent in this cluster */
940 /* first extent starting offset */
943 struct btrfs_block_group_cache *block_group;
945 * when a cluster is allocated from a block group, we put the
946 * cluster onto a list in the block group so that it can
947 * be freed before the block group is freed.
949 struct list_head block_group_list;
952 enum btrfs_caching_type {
954 BTRFS_CACHE_STARTED = 1,
955 BTRFS_CACHE_FAST = 2,
956 BTRFS_CACHE_FINISHED = 3,
959 enum btrfs_disk_cache_state {
960 BTRFS_DC_WRITTEN = 0,
964 BTRFS_DC_NEED_WRITE = 4,
967 struct btrfs_caching_control {
968 struct list_head list;
970 wait_queue_head_t wait;
971 struct btrfs_work work;
972 struct btrfs_block_group_cache *block_group;
977 struct btrfs_block_group_cache {
978 struct btrfs_key key;
979 struct btrfs_block_group_item item;
980 struct btrfs_fs_info *fs_info;
988 u64 cache_generation;
990 unsigned int dirty:1;
993 int disk_cache_state;
995 /* cache tracking stuff */
997 struct btrfs_caching_control *caching_ctl;
998 u64 last_byte_to_unpin;
1000 struct btrfs_space_info *space_info;
1002 /* free space cache stuff */
1003 struct btrfs_free_space_ctl *free_space_ctl;
1005 /* block group cache stuff */
1006 struct rb_node cache_node;
1008 /* for block groups in the same raid type */
1009 struct list_head list;
1014 /* List of struct btrfs_free_clusters for this block group.
1015 * Today it will only have one thing on it, but that may change
1017 struct list_head cluster_list;
1020 struct reloc_control;
1021 struct btrfs_device;
1022 struct btrfs_fs_devices;
1023 struct btrfs_balance_control;
1024 struct btrfs_delayed_root;
1025 struct btrfs_fs_info {
1026 u8 fsid[BTRFS_FSID_SIZE];
1027 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1028 struct btrfs_root *extent_root;
1029 struct btrfs_root *tree_root;
1030 struct btrfs_root *chunk_root;
1031 struct btrfs_root *dev_root;
1032 struct btrfs_root *fs_root;
1033 struct btrfs_root *csum_root;
1035 /* the log root tree is a directory of all the other log roots */
1036 struct btrfs_root *log_root_tree;
1038 spinlock_t fs_roots_radix_lock;
1039 struct radix_tree_root fs_roots_radix;
1041 /* block group cache stuff */
1042 spinlock_t block_group_cache_lock;
1043 struct rb_root block_group_cache_tree;
1045 /* keep track of unallocated space */
1046 spinlock_t free_chunk_lock;
1047 u64 free_chunk_space;
1049 struct extent_io_tree freed_extents[2];
1050 struct extent_io_tree *pinned_extents;
1052 /* logical->physical extent mapping */
1053 struct btrfs_mapping_tree mapping_tree;
1056 * block reservation for extent, checksum, root tree and
1057 * delayed dir index item
1059 struct btrfs_block_rsv global_block_rsv;
1060 /* block reservation for delay allocation */
1061 struct btrfs_block_rsv delalloc_block_rsv;
1062 /* block reservation for metadata operations */
1063 struct btrfs_block_rsv trans_block_rsv;
1064 /* block reservation for chunk tree */
1065 struct btrfs_block_rsv chunk_block_rsv;
1066 /* block reservation for delayed operations */
1067 struct btrfs_block_rsv delayed_block_rsv;
1069 struct btrfs_block_rsv empty_block_rsv;
1072 u64 last_trans_committed;
1075 * this is updated to the current trans every time a full commit
1076 * is required instead of the faster short fsync log commits
1078 u64 last_trans_log_full_commit;
1079 unsigned long mount_opt:21;
1080 unsigned long compress_type:4;
1083 struct btrfs_transaction *running_transaction;
1084 wait_queue_head_t transaction_throttle;
1085 wait_queue_head_t transaction_wait;
1086 wait_queue_head_t transaction_blocked_wait;
1087 wait_queue_head_t async_submit_wait;
1089 struct btrfs_super_block *super_copy;
1090 struct btrfs_super_block *super_for_commit;
1091 struct block_device *__bdev;
1092 struct super_block *sb;
1093 struct inode *btree_inode;
1094 struct backing_dev_info bdi;
1095 struct mutex tree_log_mutex;
1096 struct mutex transaction_kthread_mutex;
1097 struct mutex cleaner_mutex;
1098 struct mutex chunk_mutex;
1099 struct mutex volume_mutex;
1101 * this protects the ordered operations list only while we are
1102 * processing all of the entries on it. This way we make
1103 * sure the commit code doesn't find the list temporarily empty
1104 * because another function happens to be doing non-waiting preflush
1105 * before jumping into the main commit.
1107 struct mutex ordered_operations_mutex;
1108 struct rw_semaphore extent_commit_sem;
1110 struct rw_semaphore cleanup_work_sem;
1112 struct rw_semaphore subvol_sem;
1113 struct srcu_struct subvol_srcu;
1115 spinlock_t trans_lock;
1117 * the reloc mutex goes with the trans lock, it is taken
1118 * during commit to protect us from the relocation code
1120 struct mutex reloc_mutex;
1122 struct list_head trans_list;
1123 struct list_head hashers;
1124 struct list_head dead_roots;
1125 struct list_head caching_block_groups;
1127 spinlock_t delayed_iput_lock;
1128 struct list_head delayed_iputs;
1130 atomic_t nr_async_submits;
1131 atomic_t async_submit_draining;
1132 atomic_t nr_async_bios;
1133 atomic_t async_delalloc_pages;
1134 atomic_t open_ioctl_trans;
1137 * this is used by the balancing code to wait for all the pending
1140 spinlock_t ordered_extent_lock;
1143 * all of the data=ordered extents pending writeback
1144 * these can span multiple transactions and basically include
1145 * every dirty data page that isn't from nodatacow
1147 struct list_head ordered_extents;
1150 * all of the inodes that have delalloc bytes. It is possible for
1151 * this list to be empty even when there is still dirty data=ordered
1152 * extents waiting to finish IO.
1154 struct list_head delalloc_inodes;
1157 * special rename and truncate targets that must be on disk before
1158 * we're allowed to commit. This is basically the ext3 style
1159 * data=ordered list.
1161 struct list_head ordered_operations;
1164 * there is a pool of worker threads for checksumming during writes
1165 * and a pool for checksumming after reads. This is because readers
1166 * can run with FS locks held, and the writers may be waiting for
1167 * those locks. We don't want ordering in the pending list to cause
1168 * deadlocks, and so the two are serviced separately.
1170 * A third pool does submit_bio to avoid deadlocking with the other
1173 struct btrfs_workers generic_worker;
1174 struct btrfs_workers workers;
1175 struct btrfs_workers delalloc_workers;
1176 struct btrfs_workers endio_workers;
1177 struct btrfs_workers endio_meta_workers;
1178 struct btrfs_workers endio_meta_write_workers;
1179 struct btrfs_workers endio_write_workers;
1180 struct btrfs_workers endio_freespace_worker;
1181 struct btrfs_workers submit_workers;
1182 struct btrfs_workers caching_workers;
1183 struct btrfs_workers readahead_workers;
1186 * fixup workers take dirty pages that didn't properly go through
1187 * the cow mechanism and make them safe to write. It happens
1188 * for the sys_munmap function call path
1190 struct btrfs_workers fixup_workers;
1191 struct btrfs_workers delayed_workers;
1192 struct task_struct *transaction_kthread;
1193 struct task_struct *cleaner_kthread;
1194 int thread_pool_size;
1196 struct kobject super_kobj;
1197 struct completion kobj_unregister;
1200 int log_root_recovering;
1206 /* protected by the delalloc lock, used to keep from writing
1207 * metadata until there is a nice batch
1209 u64 dirty_metadata_bytes;
1210 struct list_head dirty_cowonly_roots;
1212 struct btrfs_fs_devices *fs_devices;
1215 * the space_info list is almost entirely read only. It only changes
1216 * when we add a new raid type to the FS, and that happens
1217 * very rarely. RCU is used to protect it.
1219 struct list_head space_info;
1221 struct reloc_control *reloc_ctl;
1223 spinlock_t delalloc_lock;
1226 /* data_alloc_cluster is only used in ssd mode */
1227 struct btrfs_free_cluster data_alloc_cluster;
1229 /* all metadata allocations go through this cluster */
1230 struct btrfs_free_cluster meta_alloc_cluster;
1232 /* auto defrag inodes go here */
1233 spinlock_t defrag_inodes_lock;
1234 struct rb_root defrag_inodes;
1235 atomic_t defrag_running;
1237 spinlock_t ref_cache_lock;
1238 u64 total_ref_cache_size;
1241 * these three are in extended format (availability of single
1242 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1243 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1245 u64 avail_data_alloc_bits;
1246 u64 avail_metadata_alloc_bits;
1247 u64 avail_system_alloc_bits;
1249 /* restriper state */
1250 spinlock_t balance_lock;
1251 struct mutex balance_mutex;
1252 atomic_t balance_running;
1253 atomic_t balance_pause_req;
1254 atomic_t balance_cancel_req;
1255 struct btrfs_balance_control *balance_ctl;
1256 wait_queue_head_t balance_wait_q;
1258 unsigned data_chunk_allocations;
1259 unsigned metadata_ratio;
1263 /* private scrub information */
1264 struct mutex scrub_lock;
1265 atomic_t scrubs_running;
1266 atomic_t scrub_pause_req;
1267 atomic_t scrubs_paused;
1268 atomic_t scrub_cancel_req;
1269 wait_queue_head_t scrub_pause_wait;
1270 struct rw_semaphore scrub_super_lock;
1271 int scrub_workers_refcnt;
1272 struct btrfs_workers scrub_workers;
1274 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1275 u32 check_integrity_print_mask;
1278 /* filesystem state */
1281 struct btrfs_delayed_root *delayed_root;
1283 /* readahead tree */
1284 spinlock_t reada_lock;
1285 struct radix_tree_root reada_tree;
1287 /* next backup root to be overwritten */
1288 int backup_root_index;
1292 * in ram representation of the tree. extent_root is used for all allocations
1293 * and for the extent tree extent_root root.
1296 struct extent_buffer *node;
1298 struct extent_buffer *commit_root;
1299 struct btrfs_root *log_root;
1300 struct btrfs_root *reloc_root;
1302 struct btrfs_root_item root_item;
1303 struct btrfs_key root_key;
1304 struct btrfs_fs_info *fs_info;
1305 struct extent_io_tree dirty_log_pages;
1307 struct kobject root_kobj;
1308 struct completion kobj_unregister;
1309 struct mutex objectid_mutex;
1311 spinlock_t accounting_lock;
1312 struct btrfs_block_rsv *block_rsv;
1314 /* free ino cache stuff */
1315 struct mutex fs_commit_mutex;
1316 struct btrfs_free_space_ctl *free_ino_ctl;
1317 enum btrfs_caching_type cached;
1318 spinlock_t cache_lock;
1319 wait_queue_head_t cache_wait;
1320 struct btrfs_free_space_ctl *free_ino_pinned;
1322 struct inode *cache_inode;
1324 struct mutex log_mutex;
1325 wait_queue_head_t log_writer_wait;
1326 wait_queue_head_t log_commit_wait[2];
1327 atomic_t log_writers;
1328 atomic_t log_commit[2];
1329 unsigned long log_transid;
1330 unsigned long last_log_commit;
1331 unsigned long log_batch;
1332 pid_t log_start_pid;
1333 bool log_multiple_pids;
1338 /* data allocations are done in sectorsize units */
1341 /* node allocations are done in nodesize units */
1344 /* leaf allocations are done in leafsize units */
1351 u64 highest_objectid;
1353 /* btrfs_record_root_in_trans is a multi-step process,
1354 * and it can race with the balancing code. But the
1355 * race is very small, and only the first time the root
1356 * is added to each transaction. So in_trans_setup
1357 * is used to tell us when more checks are required
1359 unsigned long in_trans_setup;
1364 u64 defrag_trans_start;
1365 struct btrfs_key defrag_progress;
1366 struct btrfs_key defrag_max;
1370 /* the dirty list is only used by non-reference counted roots */
1371 struct list_head dirty_list;
1373 struct list_head root_list;
1375 spinlock_t orphan_lock;
1376 struct list_head orphan_list;
1377 struct btrfs_block_rsv *orphan_block_rsv;
1378 int orphan_item_inserted;
1379 int orphan_cleanup_state;
1381 spinlock_t inode_lock;
1382 /* red-black tree that keeps track of in-memory inodes */
1383 struct rb_root inode_tree;
1386 * radix tree that keeps track of delayed nodes of every inode,
1387 * protected by inode_lock
1389 struct radix_tree_root delayed_nodes_tree;
1391 * right now this just gets used so that a root has its own devid
1392 * for stat. It may be used for more later
1399 struct btrfs_ioctl_defrag_range_args {
1400 /* start of the defrag operation */
1403 /* number of bytes to defrag, use (u64)-1 to say all */
1407 * flags for the operation, which can include turning
1408 * on compression for this one defrag
1413 * any extent bigger than this will be considered
1414 * already defragged. Use 0 to take the kernel default
1415 * Use 1 to say every single extent must be rewritten
1417 __u32 extent_thresh;
1420 * which compression method to use if turning on compression
1421 * for this defrag operation. If unspecified, zlib will
1424 __u32 compress_type;
1426 /* spare for later */
1432 * inode items have the data typically returned from stat and store other
1433 * info about object characteristics. There is one for every file and dir in
1436 #define BTRFS_INODE_ITEM_KEY 1
1437 #define BTRFS_INODE_REF_KEY 12
1438 #define BTRFS_XATTR_ITEM_KEY 24
1439 #define BTRFS_ORPHAN_ITEM_KEY 48
1440 /* reserve 2-15 close to the inode for later flexibility */
1443 * dir items are the name -> inode pointers in a directory. There is one
1444 * for every name in a directory.
1446 #define BTRFS_DIR_LOG_ITEM_KEY 60
1447 #define BTRFS_DIR_LOG_INDEX_KEY 72
1448 #define BTRFS_DIR_ITEM_KEY 84
1449 #define BTRFS_DIR_INDEX_KEY 96
1451 * extent data is for file data
1453 #define BTRFS_EXTENT_DATA_KEY 108
1456 * extent csums are stored in a separate tree and hold csums for
1457 * an entire extent on disk.
1459 #define BTRFS_EXTENT_CSUM_KEY 128
1462 * root items point to tree roots. They are typically in the root
1463 * tree used by the super block to find all the other trees
1465 #define BTRFS_ROOT_ITEM_KEY 132
1468 * root backrefs tie subvols and snapshots to the directory entries that
1471 #define BTRFS_ROOT_BACKREF_KEY 144
1474 * root refs make a fast index for listing all of the snapshots and
1475 * subvolumes referenced by a given root. They point directly to the
1476 * directory item in the root that references the subvol
1478 #define BTRFS_ROOT_REF_KEY 156
1481 * extent items are in the extent map tree. These record which blocks
1482 * are used, and how many references there are to each block
1484 #define BTRFS_EXTENT_ITEM_KEY 168
1486 #define BTRFS_TREE_BLOCK_REF_KEY 176
1488 #define BTRFS_EXTENT_DATA_REF_KEY 178
1490 #define BTRFS_EXTENT_REF_V0_KEY 180
1492 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1494 #define BTRFS_SHARED_DATA_REF_KEY 184
1497 * block groups give us hints into the extent allocation trees. Which
1498 * blocks are free etc etc
1500 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1502 #define BTRFS_DEV_EXTENT_KEY 204
1503 #define BTRFS_DEV_ITEM_KEY 216
1504 #define BTRFS_CHUNK_ITEM_KEY 228
1506 #define BTRFS_BALANCE_ITEM_KEY 248
1509 * string items are for debugging. They just store a short string of
1512 #define BTRFS_STRING_ITEM_KEY 253
1515 * Flags for mount options.
1517 * Note: don't forget to add new options to btrfs_show_options()
1519 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1520 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1521 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1522 #define BTRFS_MOUNT_SSD (1 << 3)
1523 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1524 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1525 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1526 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1527 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1528 #define BTRFS_MOUNT_NOSSD (1 << 9)
1529 #define BTRFS_MOUNT_DISCARD (1 << 10)
1530 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1531 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1532 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1533 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1534 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1535 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1536 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1537 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1538 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1539 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1540 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1542 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1543 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1544 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1549 #define BTRFS_INODE_NODATASUM (1 << 0)
1550 #define BTRFS_INODE_NODATACOW (1 << 1)
1551 #define BTRFS_INODE_READONLY (1 << 2)
1552 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1553 #define BTRFS_INODE_PREALLOC (1 << 4)
1554 #define BTRFS_INODE_SYNC (1 << 5)
1555 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1556 #define BTRFS_INODE_APPEND (1 << 7)
1557 #define BTRFS_INODE_NODUMP (1 << 8)
1558 #define BTRFS_INODE_NOATIME (1 << 9)
1559 #define BTRFS_INODE_DIRSYNC (1 << 10)
1560 #define BTRFS_INODE_COMPRESS (1 << 11)
1562 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1564 struct btrfs_map_token {
1565 struct extent_buffer *eb;
1567 unsigned long offset;
1570 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1572 memset(token, 0, sizeof(*token));
1575 /* some macros to generate set/get funcs for the struct fields. This
1576 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1579 #define le8_to_cpu(v) (v)
1580 #define cpu_to_le8(v) (v)
1583 #define read_eb_member(eb, ptr, type, member, result) ( \
1584 read_extent_buffer(eb, (char *)(result), \
1585 ((unsigned long)(ptr)) + \
1586 offsetof(type, member), \
1587 sizeof(((type *)0)->member)))
1589 #define write_eb_member(eb, ptr, type, member, result) ( \
1590 write_extent_buffer(eb, (char *)(result), \
1591 ((unsigned long)(ptr)) + \
1592 offsetof(type, member), \
1593 sizeof(((type *)0)->member)))
1595 #ifndef BTRFS_SETGET_FUNCS
1596 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1597 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1598 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1599 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1600 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1603 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1604 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1606 type *p = page_address(eb->pages[0]); \
1607 u##bits res = le##bits##_to_cpu(p->member); \
1610 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1613 type *p = page_address(eb->pages[0]); \
1614 p->member = cpu_to_le##bits(val); \
1617 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1618 static inline u##bits btrfs_##name(type *s) \
1620 return le##bits##_to_cpu(s->member); \
1622 static inline void btrfs_set_##name(type *s, u##bits val) \
1624 s->member = cpu_to_le##bits(val); \
1627 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1628 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1629 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1630 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1631 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1632 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1634 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1635 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1636 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1637 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1638 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1639 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1641 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1642 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1644 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1646 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1648 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1650 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1652 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1655 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1657 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1659 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1662 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1664 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1667 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1669 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1672 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1673 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1674 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1675 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1676 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1677 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1678 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1679 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1680 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1681 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1682 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1684 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1686 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1689 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1690 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1691 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1693 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1695 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1697 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1699 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1700 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1704 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1705 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1707 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1710 unsigned long offset = (unsigned long)c;
1711 offset += offsetof(struct btrfs_chunk, stripe);
1712 offset += nr * sizeof(struct btrfs_stripe);
1713 return (struct btrfs_stripe *)offset;
1716 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1718 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1721 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1722 struct btrfs_chunk *c, int nr)
1724 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1727 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1728 struct btrfs_chunk *c, int nr)
1730 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1733 /* struct btrfs_block_group_item */
1734 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1736 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1738 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1739 struct btrfs_block_group_item, chunk_objectid, 64);
1741 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1742 struct btrfs_block_group_item, chunk_objectid, 64);
1743 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1744 struct btrfs_block_group_item, flags, 64);
1745 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1746 struct btrfs_block_group_item, flags, 64);
1748 /* struct btrfs_inode_ref */
1749 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1750 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1752 /* struct btrfs_inode_item */
1753 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1754 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1755 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1756 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1757 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1758 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1759 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1760 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1761 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1762 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1763 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1764 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1766 static inline struct btrfs_timespec *
1767 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1769 unsigned long ptr = (unsigned long)inode_item;
1770 ptr += offsetof(struct btrfs_inode_item, atime);
1771 return (struct btrfs_timespec *)ptr;
1774 static inline struct btrfs_timespec *
1775 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1777 unsigned long ptr = (unsigned long)inode_item;
1778 ptr += offsetof(struct btrfs_inode_item, mtime);
1779 return (struct btrfs_timespec *)ptr;
1782 static inline struct btrfs_timespec *
1783 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1785 unsigned long ptr = (unsigned long)inode_item;
1786 ptr += offsetof(struct btrfs_inode_item, ctime);
1787 return (struct btrfs_timespec *)ptr;
1790 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1791 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1793 /* struct btrfs_dev_extent */
1794 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1796 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1797 chunk_objectid, 64);
1798 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1800 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1802 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1804 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1805 return (u8 *)((unsigned long)dev + ptr);
1808 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1809 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1811 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1813 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1816 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1818 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1819 struct btrfs_tree_block_info *item,
1820 struct btrfs_disk_key *key)
1822 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1825 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1826 struct btrfs_tree_block_info *item,
1827 struct btrfs_disk_key *key)
1829 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1832 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1834 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1836 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1838 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1841 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1844 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1846 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1849 static inline u32 btrfs_extent_inline_ref_size(int type)
1851 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1852 type == BTRFS_SHARED_BLOCK_REF_KEY)
1853 return sizeof(struct btrfs_extent_inline_ref);
1854 if (type == BTRFS_SHARED_DATA_REF_KEY)
1855 return sizeof(struct btrfs_shared_data_ref) +
1856 sizeof(struct btrfs_extent_inline_ref);
1857 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1858 return sizeof(struct btrfs_extent_data_ref) +
1859 offsetof(struct btrfs_extent_inline_ref, offset);
1864 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1865 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1867 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1868 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1870 /* struct btrfs_node */
1871 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1872 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1874 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1877 ptr = offsetof(struct btrfs_node, ptrs) +
1878 sizeof(struct btrfs_key_ptr) * nr;
1879 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1882 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1886 ptr = offsetof(struct btrfs_node, ptrs) +
1887 sizeof(struct btrfs_key_ptr) * nr;
1888 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1891 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1894 ptr = offsetof(struct btrfs_node, ptrs) +
1895 sizeof(struct btrfs_key_ptr) * nr;
1896 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1899 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1903 ptr = offsetof(struct btrfs_node, ptrs) +
1904 sizeof(struct btrfs_key_ptr) * nr;
1905 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1908 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1910 return offsetof(struct btrfs_node, ptrs) +
1911 sizeof(struct btrfs_key_ptr) * nr;
1914 void btrfs_node_key(struct extent_buffer *eb,
1915 struct btrfs_disk_key *disk_key, int nr);
1917 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1918 struct btrfs_disk_key *disk_key, int nr)
1921 ptr = btrfs_node_key_ptr_offset(nr);
1922 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1923 struct btrfs_key_ptr, key, disk_key);
1926 /* struct btrfs_item */
1927 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1928 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1930 static inline unsigned long btrfs_item_nr_offset(int nr)
1932 return offsetof(struct btrfs_leaf, items) +
1933 sizeof(struct btrfs_item) * nr;
1936 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1939 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1942 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1943 struct btrfs_item *item)
1945 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1948 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1950 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1953 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1955 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1958 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1960 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1963 static inline void btrfs_item_key(struct extent_buffer *eb,
1964 struct btrfs_disk_key *disk_key, int nr)
1966 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1967 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1970 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1971 struct btrfs_disk_key *disk_key, int nr)
1973 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1974 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1977 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1980 * struct btrfs_root_ref
1982 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1983 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1984 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1986 /* struct btrfs_dir_item */
1987 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1988 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1989 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1990 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1992 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1993 struct btrfs_dir_item *item,
1994 struct btrfs_disk_key *key)
1996 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1999 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2000 struct btrfs_dir_item *item,
2001 struct btrfs_disk_key *key)
2003 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2006 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2008 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2010 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2013 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2014 struct btrfs_free_space_header *h,
2015 struct btrfs_disk_key *key)
2017 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2020 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2021 struct btrfs_free_space_header *h,
2022 struct btrfs_disk_key *key)
2024 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2027 /* struct btrfs_disk_key */
2028 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2030 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2031 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2033 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2034 struct btrfs_disk_key *disk)
2036 cpu->offset = le64_to_cpu(disk->offset);
2037 cpu->type = disk->type;
2038 cpu->objectid = le64_to_cpu(disk->objectid);
2041 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2042 struct btrfs_key *cpu)
2044 disk->offset = cpu_to_le64(cpu->offset);
2045 disk->type = cpu->type;
2046 disk->objectid = cpu_to_le64(cpu->objectid);
2049 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2050 struct btrfs_key *key, int nr)
2052 struct btrfs_disk_key disk_key;
2053 btrfs_node_key(eb, &disk_key, nr);
2054 btrfs_disk_key_to_cpu(key, &disk_key);
2057 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2058 struct btrfs_key *key, int nr)
2060 struct btrfs_disk_key disk_key;
2061 btrfs_item_key(eb, &disk_key, nr);
2062 btrfs_disk_key_to_cpu(key, &disk_key);
2065 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2066 struct btrfs_dir_item *item,
2067 struct btrfs_key *key)
2069 struct btrfs_disk_key disk_key;
2070 btrfs_dir_item_key(eb, item, &disk_key);
2071 btrfs_disk_key_to_cpu(key, &disk_key);
2075 static inline u8 btrfs_key_type(struct btrfs_key *key)
2080 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2085 /* struct btrfs_header */
2086 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2087 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2089 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2090 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2091 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2092 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2094 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2096 return (btrfs_header_flags(eb) & flag) == flag;
2099 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2101 u64 flags = btrfs_header_flags(eb);
2102 btrfs_set_header_flags(eb, flags | flag);
2103 return (flags & flag) == flag;
2106 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2108 u64 flags = btrfs_header_flags(eb);
2109 btrfs_set_header_flags(eb, flags & ~flag);
2110 return (flags & flag) == flag;
2113 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2115 u64 flags = btrfs_header_flags(eb);
2116 return flags >> BTRFS_BACKREF_REV_SHIFT;
2119 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2122 u64 flags = btrfs_header_flags(eb);
2123 flags &= ~BTRFS_BACKREF_REV_MASK;
2124 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2125 btrfs_set_header_flags(eb, flags);
2128 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2130 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2134 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2136 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2140 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2142 return btrfs_header_level(eb) == 0;
2145 /* struct btrfs_root_item */
2146 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2148 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2149 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2150 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2152 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2154 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2155 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2156 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2157 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2158 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2159 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2160 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2161 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2164 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2166 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
2169 /* struct btrfs_root_backup */
2170 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2172 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2174 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2175 tree_root_level, 8);
2177 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2179 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2180 chunk_root_gen, 64);
2181 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2182 chunk_root_level, 8);
2184 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2187 extent_root_gen, 64);
2188 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2189 extent_root_level, 8);
2191 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2193 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2195 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2198 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2202 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2205 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2209 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2210 csum_root_level, 8);
2211 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2213 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2215 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2218 /* struct btrfs_balance_item */
2219 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2221 static inline void btrfs_balance_data(struct extent_buffer *eb,
2222 struct btrfs_balance_item *bi,
2223 struct btrfs_disk_balance_args *ba)
2225 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2228 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2229 struct btrfs_balance_item *bi,
2230 struct btrfs_disk_balance_args *ba)
2232 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2235 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2236 struct btrfs_balance_item *bi,
2237 struct btrfs_disk_balance_args *ba)
2239 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2242 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2243 struct btrfs_balance_item *bi,
2244 struct btrfs_disk_balance_args *ba)
2246 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2249 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2250 struct btrfs_balance_item *bi,
2251 struct btrfs_disk_balance_args *ba)
2253 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2256 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2257 struct btrfs_balance_item *bi,
2258 struct btrfs_disk_balance_args *ba)
2260 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2264 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2265 struct btrfs_disk_balance_args *disk)
2267 memset(cpu, 0, sizeof(*cpu));
2269 cpu->profiles = le64_to_cpu(disk->profiles);
2270 cpu->usage = le64_to_cpu(disk->usage);
2271 cpu->devid = le64_to_cpu(disk->devid);
2272 cpu->pstart = le64_to_cpu(disk->pstart);
2273 cpu->pend = le64_to_cpu(disk->pend);
2274 cpu->vstart = le64_to_cpu(disk->vstart);
2275 cpu->vend = le64_to_cpu(disk->vend);
2276 cpu->target = le64_to_cpu(disk->target);
2277 cpu->flags = le64_to_cpu(disk->flags);
2281 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2282 struct btrfs_balance_args *cpu)
2284 memset(disk, 0, sizeof(*disk));
2286 disk->profiles = cpu_to_le64(cpu->profiles);
2287 disk->usage = cpu_to_le64(cpu->usage);
2288 disk->devid = cpu_to_le64(cpu->devid);
2289 disk->pstart = cpu_to_le64(cpu->pstart);
2290 disk->pend = cpu_to_le64(cpu->pend);
2291 disk->vstart = cpu_to_le64(cpu->vstart);
2292 disk->vend = cpu_to_le64(cpu->vend);
2293 disk->target = cpu_to_le64(cpu->target);
2294 disk->flags = cpu_to_le64(cpu->flags);
2297 /* struct btrfs_super_block */
2298 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2299 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2302 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2303 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2304 struct btrfs_super_block, sys_chunk_array_size, 32);
2305 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2306 struct btrfs_super_block, chunk_root_generation, 64);
2307 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2309 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2311 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2312 chunk_root_level, 8);
2313 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2315 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2316 log_root_transid, 64);
2317 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2319 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2321 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2323 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2325 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2327 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2329 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2331 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2332 root_dir_objectid, 64);
2333 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2335 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2337 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2338 compat_ro_flags, 64);
2339 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2340 incompat_flags, 64);
2341 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2343 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2344 cache_generation, 64);
2346 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2348 int t = btrfs_super_csum_type(s);
2349 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2350 return btrfs_csum_sizes[t];
2353 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2355 return offsetof(struct btrfs_leaf, items);
2358 /* struct btrfs_file_extent_item */
2359 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2361 static inline unsigned long
2362 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2364 unsigned long offset = (unsigned long)e;
2365 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2369 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2371 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2374 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2376 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2378 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2379 disk_num_bytes, 64);
2380 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2382 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2384 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2386 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2388 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2390 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2391 other_encoding, 16);
2393 /* this returns the number of file bytes represented by the inline item.
2394 * If an item is compressed, this is the uncompressed size
2396 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2397 struct btrfs_file_extent_item *e)
2399 return btrfs_file_extent_ram_bytes(eb, e);
2403 * this returns the number of bytes used by the item on disk, minus the
2404 * size of any extent headers. If a file is compressed on disk, this is
2405 * the compressed size
2407 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2408 struct btrfs_item *e)
2410 unsigned long offset;
2411 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2412 return btrfs_item_size(eb, e) - offset;
2415 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2417 return sb->s_fs_info;
2420 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2423 return root->leafsize;
2424 return root->nodesize;
2427 /* helper function to cast into the data area of the leaf. */
2428 #define btrfs_item_ptr(leaf, slot, type) \
2429 ((type *)(btrfs_leaf_data(leaf) + \
2430 btrfs_item_offset_nr(leaf, slot)))
2432 #define btrfs_item_ptr_offset(leaf, slot) \
2433 ((unsigned long)(btrfs_leaf_data(leaf) + \
2434 btrfs_item_offset_nr(leaf, slot)))
2436 static inline struct dentry *fdentry(struct file *file)
2438 return file->f_path.dentry;
2441 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2443 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2444 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2447 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2449 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2453 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2456 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2461 * Doing a truncate won't result in new nodes or leaves, just what we need for
2464 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2467 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2471 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2472 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2473 struct btrfs_root *root, unsigned long count);
2474 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2475 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root, u64 bytenr,
2477 u64 num_bytes, u64 *refs, u64 *flags);
2478 int btrfs_pin_extent(struct btrfs_root *root,
2479 u64 bytenr, u64 num, int reserved);
2480 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 u64 bytenr, u64 num_bytes);
2483 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2484 struct btrfs_root *root,
2485 u64 objectid, u64 offset, u64 bytenr);
2486 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2487 struct btrfs_fs_info *info,
2489 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2490 u64 btrfs_find_block_group(struct btrfs_root *root,
2491 u64 search_start, u64 search_hint, int owner);
2492 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root, u32 blocksize,
2494 u64 parent, u64 root_objectid,
2495 struct btrfs_disk_key *key, int level,
2496 u64 hint, u64 empty_size, int for_cow);
2497 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root,
2499 struct extent_buffer *buf,
2500 u64 parent, int last_ref, int for_cow);
2501 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2502 struct btrfs_root *root,
2503 u64 bytenr, u32 blocksize,
2505 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2506 struct btrfs_root *root,
2507 u64 root_objectid, u64 owner,
2508 u64 offset, struct btrfs_key *ins);
2509 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root,
2511 u64 root_objectid, u64 owner, u64 offset,
2512 struct btrfs_key *ins);
2513 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2514 struct btrfs_root *root,
2515 u64 num_bytes, u64 min_alloc_size,
2516 u64 empty_size, u64 hint_byte,
2517 struct btrfs_key *ins, u64 data);
2518 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2519 struct extent_buffer *buf, int full_backref, int for_cow);
2520 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2521 struct extent_buffer *buf, int full_backref, int for_cow);
2522 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2523 struct btrfs_root *root,
2524 u64 bytenr, u64 num_bytes, u64 flags,
2526 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2527 struct btrfs_root *root,
2528 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2529 u64 owner, u64 offset, int for_cow);
2531 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2532 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2533 u64 start, u64 len);
2534 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root);
2536 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2537 struct btrfs_root *root);
2538 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2539 struct btrfs_root *root,
2540 u64 bytenr, u64 num_bytes, u64 parent,
2541 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2543 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2544 struct btrfs_root *root);
2545 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2546 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2547 int btrfs_read_block_groups(struct btrfs_root *root);
2548 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2549 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root, u64 bytes_used,
2551 u64 type, u64 chunk_objectid, u64 chunk_offset,
2553 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2554 struct btrfs_root *root, u64 group_start);
2555 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2556 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2557 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2558 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2559 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2560 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2561 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2562 struct btrfs_root *root);
2563 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2564 struct inode *inode);
2565 void btrfs_orphan_release_metadata(struct inode *inode);
2566 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2567 struct btrfs_pending_snapshot *pending);
2568 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2569 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2570 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2571 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2572 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2573 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2574 void btrfs_free_block_rsv(struct btrfs_root *root,
2575 struct btrfs_block_rsv *rsv);
2576 int btrfs_block_rsv_add(struct btrfs_root *root,
2577 struct btrfs_block_rsv *block_rsv,
2579 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2580 struct btrfs_block_rsv *block_rsv,
2582 int btrfs_block_rsv_check(struct btrfs_root *root,
2583 struct btrfs_block_rsv *block_rsv, int min_factor);
2584 int btrfs_block_rsv_refill(struct btrfs_root *root,
2585 struct btrfs_block_rsv *block_rsv,
2587 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2588 struct btrfs_block_rsv *block_rsv,
2590 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2591 struct btrfs_block_rsv *dst_rsv,
2593 void btrfs_block_rsv_release(struct btrfs_root *root,
2594 struct btrfs_block_rsv *block_rsv,
2596 int btrfs_set_block_group_ro(struct btrfs_root *root,
2597 struct btrfs_block_group_cache *cache);
2598 int btrfs_set_block_group_rw(struct btrfs_root *root,
2599 struct btrfs_block_group_cache *cache);
2600 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2601 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2602 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2603 u64 start, u64 end);
2604 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2605 u64 num_bytes, u64 *actual_bytes);
2606 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root, u64 type);
2608 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2610 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2612 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2613 int level, int *slot);
2614 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2615 int btrfs_previous_item(struct btrfs_root *root,
2616 struct btrfs_path *path, u64 min_objectid,
2618 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2619 struct btrfs_root *root, struct btrfs_path *path,
2620 struct btrfs_key *new_key);
2621 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2622 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2623 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2624 struct btrfs_key *key, int lowest_level,
2625 int cache_only, u64 min_trans);
2626 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2627 struct btrfs_key *max_key,
2628 struct btrfs_path *path, int cache_only,
2630 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2631 struct btrfs_root *root, struct extent_buffer *buf,
2632 struct extent_buffer *parent, int parent_slot,
2633 struct extent_buffer **cow_ret);
2634 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root,
2636 struct extent_buffer *buf,
2637 struct extent_buffer **cow_ret, u64 new_root_objectid);
2638 int btrfs_block_can_be_shared(struct btrfs_root *root,
2639 struct extent_buffer *buf);
2640 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2641 *root, struct btrfs_path *path, u32 data_size);
2642 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2643 struct btrfs_root *root,
2644 struct btrfs_path *path,
2645 u32 new_size, int from_end);
2646 int btrfs_split_item(struct btrfs_trans_handle *trans,
2647 struct btrfs_root *root,
2648 struct btrfs_path *path,
2649 struct btrfs_key *new_key,
2650 unsigned long split_offset);
2651 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root,
2653 struct btrfs_path *path,
2654 struct btrfs_key *new_key);
2655 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2656 *root, struct btrfs_key *key, struct btrfs_path *p, int
2658 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2659 struct btrfs_root *root, struct extent_buffer *parent,
2660 int start_slot, int cache_only, u64 *last_ret,
2661 struct btrfs_key *progress);
2662 void btrfs_release_path(struct btrfs_path *p);
2663 struct btrfs_path *btrfs_alloc_path(void);
2664 void btrfs_free_path(struct btrfs_path *p);
2665 void btrfs_set_path_blocking(struct btrfs_path *p);
2666 void btrfs_clear_path_blocking(struct btrfs_path *p,
2667 struct extent_buffer *held, int held_rw);
2668 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2670 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2671 struct btrfs_path *path, int slot, int nr);
2672 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2673 struct btrfs_root *root,
2674 struct btrfs_path *path)
2676 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2679 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2680 struct btrfs_root *root, struct btrfs_path *path,
2681 struct btrfs_key *cpu_key, u32 *data_size,
2682 u32 total_data, u32 total_size, int nr);
2683 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2684 *root, struct btrfs_key *key, void *data, u32 data_size);
2685 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2686 struct btrfs_root *root,
2687 struct btrfs_path *path,
2688 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2690 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2691 struct btrfs_root *root,
2692 struct btrfs_path *path,
2693 struct btrfs_key *key,
2696 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2699 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2700 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2703 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2704 return btrfs_next_leaf(root, p);
2707 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2708 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2709 void btrfs_drop_snapshot(struct btrfs_root *root,
2710 struct btrfs_block_rsv *block_rsv, int update_ref,
2712 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2713 struct btrfs_root *root,
2714 struct extent_buffer *node,
2715 struct extent_buffer *parent);
2716 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2719 * Get synced with close_ctree()
2722 return fs_info->closing;
2724 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2726 kfree(fs_info->balance_ctl);
2727 kfree(fs_info->delayed_root);
2728 kfree(fs_info->extent_root);
2729 kfree(fs_info->tree_root);
2730 kfree(fs_info->chunk_root);
2731 kfree(fs_info->dev_root);
2732 kfree(fs_info->csum_root);
2733 kfree(fs_info->super_copy);
2734 kfree(fs_info->super_for_commit);
2738 * alloc_profile_is_valid - see if a given profile is valid and reduced
2739 * @flags: profile to validate
2740 * @extended: if true @flags is treated as an extended profile
2742 static inline int alloc_profile_is_valid(u64 flags, int extended)
2744 u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK :
2745 BTRFS_BLOCK_GROUP_PROFILE_MASK);
2747 flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
2749 /* 1) check that all other bits are zeroed */
2753 /* 2) see if profile is reduced */
2755 return !extended; /* "0" is valid for usual profiles */
2757 /* true if exactly one bit set */
2758 return (flags & (flags - 1)) == 0;
2762 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2763 struct btrfs_path *path,
2764 u64 root_id, u64 ref_id);
2765 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2766 struct btrfs_root *tree_root,
2767 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2768 const char *name, int name_len);
2769 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2770 struct btrfs_root *tree_root,
2771 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2772 const char *name, int name_len);
2773 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2774 struct btrfs_key *key);
2775 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2776 *root, struct btrfs_key *key, struct btrfs_root_item
2778 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2779 *root, struct btrfs_key *key, struct btrfs_root_item
2781 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2782 btrfs_root_item *item, struct btrfs_key *key);
2783 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2784 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2785 void btrfs_set_root_node(struct btrfs_root_item *item,
2786 struct extent_buffer *node);
2787 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2790 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root, const char *name,
2792 int name_len, struct inode *dir,
2793 struct btrfs_key *location, u8 type, u64 index);
2794 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2795 struct btrfs_root *root,
2796 struct btrfs_path *path, u64 dir,
2797 const char *name, int name_len,
2799 struct btrfs_dir_item *
2800 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2801 struct btrfs_root *root,
2802 struct btrfs_path *path, u64 dir,
2803 u64 objectid, const char *name, int name_len,
2805 struct btrfs_dir_item *
2806 btrfs_search_dir_index_item(struct btrfs_root *root,
2807 struct btrfs_path *path, u64 dirid,
2808 const char *name, int name_len);
2809 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2810 struct btrfs_path *path,
2811 const char *name, int name_len);
2812 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 struct btrfs_path *path,
2815 struct btrfs_dir_item *di);
2816 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2817 struct btrfs_root *root,
2818 struct btrfs_path *path, u64 objectid,
2819 const char *name, u16 name_len,
2820 const void *data, u16 data_len);
2821 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2822 struct btrfs_root *root,
2823 struct btrfs_path *path, u64 dir,
2824 const char *name, u16 name_len,
2826 int verify_dir_item(struct btrfs_root *root,
2827 struct extent_buffer *leaf,
2828 struct btrfs_dir_item *dir_item);
2831 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2832 struct btrfs_root *root, u64 offset);
2833 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root, u64 offset);
2835 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2838 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2839 struct btrfs_root *root,
2840 const char *name, int name_len,
2841 u64 inode_objectid, u64 ref_objectid, u64 index);
2842 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2843 struct btrfs_root *root,
2844 const char *name, int name_len,
2845 u64 inode_objectid, u64 ref_objectid, u64 *index);
2846 struct btrfs_inode_ref *
2847 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2848 struct btrfs_root *root,
2849 struct btrfs_path *path,
2850 const char *name, int name_len,
2851 u64 inode_objectid, u64 ref_objectid, int mod);
2852 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2853 struct btrfs_root *root,
2854 struct btrfs_path *path, u64 objectid);
2855 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2856 *root, struct btrfs_path *path,
2857 struct btrfs_key *location, int mod);
2860 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root, u64 bytenr, u64 len);
2862 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2863 struct bio *bio, u32 *dst);
2864 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2865 struct bio *bio, u64 logical_offset, u32 *dst);
2866 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2867 struct btrfs_root *root,
2868 u64 objectid, u64 pos,
2869 u64 disk_offset, u64 disk_num_bytes,
2870 u64 num_bytes, u64 offset, u64 ram_bytes,
2871 u8 compression, u8 encryption, u16 other_encoding);
2872 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2873 struct btrfs_root *root,
2874 struct btrfs_path *path, u64 objectid,
2875 u64 bytenr, int mod);
2876 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2877 struct btrfs_root *root,
2878 struct btrfs_ordered_sum *sums);
2879 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2880 struct bio *bio, u64 file_start, int contig);
2881 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2882 struct btrfs_root *root,
2883 struct btrfs_path *path,
2884 u64 bytenr, int cow);
2885 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2886 struct btrfs_root *root, struct btrfs_path *path,
2888 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2889 struct list_head *list, int search_commit);
2891 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2892 size_t pg_offset, u64 start, u64 len,
2895 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2896 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2897 #define ClearPageChecked ClearPageFsMisc
2898 #define SetPageChecked SetPageFsMisc
2899 #define PageChecked PageFsMisc
2902 /* This forces readahead on a given range of bytes in an inode */
2903 static inline void btrfs_force_ra(struct address_space *mapping,
2904 struct file_ra_state *ra, struct file *file,
2905 pgoff_t offset, unsigned long req_size)
2907 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2910 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2911 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2912 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root,
2914 struct inode *dir, struct inode *inode,
2915 const char *name, int name_len);
2916 int btrfs_add_link(struct btrfs_trans_handle *trans,
2917 struct inode *parent_inode, struct inode *inode,
2918 const char *name, int name_len, int add_backref, u64 index);
2919 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2920 struct btrfs_root *root,
2921 struct inode *dir, u64 objectid,
2922 const char *name, int name_len);
2923 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2924 struct btrfs_root *root,
2925 struct inode *inode, u64 new_size,
2928 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2929 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2930 struct extent_state **cached_state);
2931 int btrfs_writepages(struct address_space *mapping,
2932 struct writeback_control *wbc);
2933 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *new_root, u64 new_dirid);
2935 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2936 size_t size, struct bio *bio, unsigned long bio_flags);
2938 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2939 int btrfs_readpage(struct file *file, struct page *page);
2940 void btrfs_evict_inode(struct inode *inode);
2941 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2942 int btrfs_dirty_inode(struct inode *inode);
2943 int btrfs_update_time(struct file *file);
2944 struct inode *btrfs_alloc_inode(struct super_block *sb);
2945 void btrfs_destroy_inode(struct inode *inode);
2946 int btrfs_drop_inode(struct inode *inode);
2947 int btrfs_init_cachep(void);
2948 void btrfs_destroy_cachep(void);
2949 long btrfs_ioctl_trans_end(struct file *file);
2950 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2951 struct btrfs_root *root, int *was_new);
2952 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2953 size_t pg_offset, u64 start, u64 end,
2955 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2956 struct btrfs_root *root,
2957 struct inode *inode);
2958 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2959 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2960 int btrfs_orphan_cleanup(struct btrfs_root *root);
2961 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root);
2963 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2964 int btrfs_invalidate_inodes(struct btrfs_root *root);
2965 void btrfs_add_delayed_iput(struct inode *inode);
2966 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2967 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2968 u64 start, u64 num_bytes, u64 min_size,
2969 loff_t actual_len, u64 *alloc_hint);
2970 int btrfs_prealloc_file_range_trans(struct inode *inode,
2971 struct btrfs_trans_handle *trans, int mode,
2972 u64 start, u64 num_bytes, u64 min_size,
2973 loff_t actual_len, u64 *alloc_hint);
2974 extern const struct dentry_operations btrfs_dentry_operations;
2977 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2978 void btrfs_update_iflags(struct inode *inode);
2979 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2980 int btrfs_defrag_file(struct inode *inode, struct file *file,
2981 struct btrfs_ioctl_defrag_range_args *range,
2982 u64 newer_than, unsigned long max_pages);
2984 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2985 struct inode *inode);
2986 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2987 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2988 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2990 extern const struct file_operations btrfs_file_operations;
2991 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2992 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2993 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2994 struct inode *inode, u64 start, u64 end);
2995 int btrfs_release_file(struct inode *inode, struct file *file);
2996 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2997 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2998 struct page **pages, size_t num_pages,
2999 loff_t pos, size_t write_bytes,
3000 struct extent_state **cached);
3003 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3004 struct btrfs_root *root, int cache_only);
3007 int btrfs_init_sysfs(void);
3008 void btrfs_exit_sysfs(void);
3011 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3014 int btrfs_parse_options(struct btrfs_root *root, char *options);
3015 int btrfs_sync_fs(struct super_block *sb, int wait);
3016 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3017 unsigned int line, int errno);
3019 #define btrfs_std_error(fs_info, errno) \
3022 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
3026 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3027 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3028 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3029 struct inode *inode, struct inode *dir);
3030 int btrfs_acl_chmod(struct inode *inode);
3032 #define btrfs_get_acl NULL
3033 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3034 struct inode *inode, struct inode *dir)
3038 static inline int btrfs_acl_chmod(struct inode *inode)
3045 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3046 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3047 struct btrfs_root *root);
3048 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3049 struct btrfs_root *root);
3050 int btrfs_recover_relocation(struct btrfs_root *root);
3051 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3052 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root, struct extent_buffer *buf,
3054 struct extent_buffer *cow);
3055 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3056 struct btrfs_pending_snapshot *pending,
3057 u64 *bytes_to_reserve);
3058 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3059 struct btrfs_pending_snapshot *pending);
3062 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3063 struct btrfs_scrub_progress *progress, int readonly);
3064 int btrfs_scrub_pause(struct btrfs_root *root);
3065 int btrfs_scrub_pause_super(struct btrfs_root *root);
3066 int btrfs_scrub_continue(struct btrfs_root *root);
3067 int btrfs_scrub_continue_super(struct btrfs_root *root);
3068 int btrfs_scrub_cancel(struct btrfs_root *root);
3069 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3070 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3071 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3072 struct btrfs_scrub_progress *progress);
3075 struct reada_control {
3076 struct btrfs_root *root; /* tree to prefetch */
3077 struct btrfs_key key_start;
3078 struct btrfs_key key_end; /* exclusive */
3081 wait_queue_head_t wait;
3083 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3084 struct btrfs_key *start, struct btrfs_key *end);
3085 int btrfs_reada_wait(void *handle);
3086 void btrfs_reada_detach(void *handle);
3087 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3088 u64 start, int err);