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_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for sotring
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
157 /* 32 bytes in various csum fields */
158 #define BTRFS_CSUM_SIZE 32
161 #define BTRFS_CSUM_TYPE_CRC32 0
163 static int btrfs_csum_sizes[] = { 4, 0 };
165 /* four bytes for CRC32 */
166 #define BTRFS_EMPTY_DIR_SIZE 0
168 #define BTRFS_FT_UNKNOWN 0
169 #define BTRFS_FT_REG_FILE 1
170 #define BTRFS_FT_DIR 2
171 #define BTRFS_FT_CHRDEV 3
172 #define BTRFS_FT_BLKDEV 4
173 #define BTRFS_FT_FIFO 5
174 #define BTRFS_FT_SOCK 6
175 #define BTRFS_FT_SYMLINK 7
176 #define BTRFS_FT_XATTR 8
177 #define BTRFS_FT_MAX 9
179 /* ioprio of readahead is set to idle */
180 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
183 * The key defines the order in the tree, and so it also defines (optimal)
186 * objectid corresponds to the inode number.
188 * type tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with type of 1 might refer to the inode data,
190 * type of 2 may point to file data in the btree and type == 3 may point to
193 * offset is the starting byte offset for this key in the stream.
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
199 struct btrfs_disk_key {
203 } __attribute__ ((__packed__));
209 } __attribute__ ((__packed__));
211 struct btrfs_mapping_tree {
212 struct extent_map_tree map_tree;
215 struct btrfs_dev_item {
216 /* the internal btrfs device id */
219 /* size of the device */
225 /* optimal io alignment for this device */
228 /* optimal io width for this device */
231 /* minimal io size for this device */
234 /* type and info about this device */
237 /* expected generation for this device */
241 * starting byte of this partition on the device,
242 * to allow for stripe alignment in the future
246 /* grouping information for allocation decisions */
249 /* seek speed 0-100 where 100 is fastest */
252 /* bandwidth 0-100 where 100 is fastest */
255 /* btrfs generated uuid for this device */
256 u8 uuid[BTRFS_UUID_SIZE];
258 /* uuid of FS who owns this device */
259 u8 fsid[BTRFS_UUID_SIZE];
260 } __attribute__ ((__packed__));
262 struct btrfs_stripe {
265 u8 dev_uuid[BTRFS_UUID_SIZE];
266 } __attribute__ ((__packed__));
269 /* size of this chunk in bytes */
272 /* objectid of the root referencing this chunk */
278 /* optimal io alignment for this chunk */
281 /* optimal io width for this chunk */
284 /* minimal io size for this chunk */
287 /* 2^16 stripes is quite a lot, a second limit is the size of a single
292 /* sub stripes only matter for raid10 */
294 struct btrfs_stripe stripe;
295 /* additional stripes go here */
296 } __attribute__ ((__packed__));
298 #define BTRFS_FREE_SPACE_EXTENT 1
299 #define BTRFS_FREE_SPACE_BITMAP 2
301 struct btrfs_free_space_entry {
305 } __attribute__ ((__packed__));
307 struct btrfs_free_space_header {
308 struct btrfs_disk_key location;
312 } __attribute__ ((__packed__));
314 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
316 BUG_ON(num_stripes == 0);
317 return sizeof(struct btrfs_chunk) +
318 sizeof(struct btrfs_stripe) * (num_stripes - 1);
321 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
322 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
328 /* Errors detected */
329 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
331 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
332 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
334 #define BTRFS_BACKREF_REV_MAX 256
335 #define BTRFS_BACKREF_REV_SHIFT 56
336 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
337 BTRFS_BACKREF_REV_SHIFT)
339 #define BTRFS_OLD_BACKREF_REV 0
340 #define BTRFS_MIXED_BACKREF_REV 1
343 * every tree block (leaf or node) starts with this header.
345 struct btrfs_header {
346 /* these first four must match the super block */
347 u8 csum[BTRFS_CSUM_SIZE];
348 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
349 __le64 bytenr; /* which block this node is supposed to live in */
352 /* allowed to be different from the super from here on down */
353 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
358 } __attribute__ ((__packed__));
360 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
361 sizeof(struct btrfs_header)) / \
362 sizeof(struct btrfs_key_ptr))
363 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
364 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
365 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) - \
367 sizeof(struct btrfs_file_extent_item))
368 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
369 sizeof(struct btrfs_item) -\
370 sizeof(struct btrfs_dir_item))
374 * this is a very generous portion of the super block, giving us
375 * room to translate 14 chunks with 3 stripes each.
377 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
378 #define BTRFS_LABEL_SIZE 256
381 * just in case we somehow lose the roots and are not able to mount,
382 * we store an array of the roots from previous transactions
385 #define BTRFS_NUM_BACKUP_ROOTS 4
386 struct btrfs_root_backup {
388 __le64 tree_root_gen;
391 __le64 chunk_root_gen;
394 __le64 extent_root_gen;
403 __le64 csum_root_gen;
413 u8 extent_root_level;
417 /* future and to align */
419 } __attribute__ ((__packed__));
422 * the super block basically lists the main trees of the FS
423 * it currently lacks any block count etc etc
425 struct btrfs_super_block {
426 u8 csum[BTRFS_CSUM_SIZE];
427 /* the first 4 fields must match struct btrfs_header */
428 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
429 __le64 bytenr; /* this block number */
432 /* allowed to be different from the btrfs_header from here own down */
439 /* this will help find the new super based on the log root */
440 __le64 log_root_transid;
443 __le64 root_dir_objectid;
449 __le32 sys_chunk_array_size;
450 __le64 chunk_root_generation;
452 __le64 compat_ro_flags;
453 __le64 incompat_flags;
458 struct btrfs_dev_item dev_item;
460 char label[BTRFS_LABEL_SIZE];
462 __le64 cache_generation;
464 /* future expansion */
466 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
467 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
468 } __attribute__ ((__packed__));
471 * Compat flags that we support. If any incompat flags are set other than the
472 * ones specified below then we will fail to mount
474 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
475 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
476 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
477 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
479 * some patches floated around with a second compression method
480 * lets save that incompat here for when they do get in
481 * Note we don't actually support it, we're just reserving the
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
487 * older kernels tried to do bigger metadata blocks, but the
488 * code was pretty buggy. Lets not let them try anymore.
490 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
492 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
494 #define BTRFS_FEATURE_INCOMPAT_SUPP \
495 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
496 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
498 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
502 * A leaf is full of items. offset and size tell us where to find
503 * the item in the leaf (relative to the start of the data area)
506 struct btrfs_disk_key key;
509 } __attribute__ ((__packed__));
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
515 * The data is separate from the items to get the keys closer together
519 struct btrfs_header header;
520 struct btrfs_item items[];
521 } __attribute__ ((__packed__));
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
527 struct btrfs_key_ptr {
528 struct btrfs_disk_key key;
531 } __attribute__ ((__packed__));
534 struct btrfs_header header;
535 struct btrfs_key_ptr ptrs[];
536 } __attribute__ ((__packed__));
539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
541 * to any other levels that are present.
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
547 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
548 int slots[BTRFS_MAX_LEVEL];
549 /* if there is real range locking, this locks field will change */
550 int locks[BTRFS_MAX_LEVEL];
552 /* keep some upper locks as we walk down */
556 * set by btrfs_split_item, tells search_slot to keep all locks
557 * and to force calls to keep space in the nodes
559 unsigned int search_for_split:1;
560 unsigned int keep_locks:1;
561 unsigned int skip_locking:1;
562 unsigned int leave_spinning:1;
563 unsigned int search_commit_root:1;
567 * items in the extent btree are used to record the objectid of the
568 * owner of the block and the number of references
571 struct btrfs_extent_item {
575 } __attribute__ ((__packed__));
577 struct btrfs_extent_item_v0 {
579 } __attribute__ ((__packed__));
581 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
582 sizeof(struct btrfs_item))
584 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
585 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
587 /* following flags only apply to tree blocks */
589 /* use full backrefs for extent pointers in the block */
590 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
593 * this flag is only used internally by scrub and may be changed at any time
594 * it is only declared here to avoid collisions
596 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
598 struct btrfs_tree_block_info {
599 struct btrfs_disk_key key;
601 } __attribute__ ((__packed__));
603 struct btrfs_extent_data_ref {
608 } __attribute__ ((__packed__));
610 struct btrfs_shared_data_ref {
612 } __attribute__ ((__packed__));
614 struct btrfs_extent_inline_ref {
617 } __attribute__ ((__packed__));
619 /* old style backrefs item */
620 struct btrfs_extent_ref_v0 {
625 } __attribute__ ((__packed__));
628 /* dev extents record free space on individual devices. The owner
629 * field points back to the chunk allocation mapping tree that allocated
630 * the extent. The chunk tree uuid field is a way to double check the owner
632 struct btrfs_dev_extent {
634 __le64 chunk_objectid;
637 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
638 } __attribute__ ((__packed__));
640 struct btrfs_inode_ref {
644 } __attribute__ ((__packed__));
646 struct btrfs_timespec {
649 } __attribute__ ((__packed__));
651 enum btrfs_compression_type {
652 BTRFS_COMPRESS_NONE = 0,
653 BTRFS_COMPRESS_ZLIB = 1,
654 BTRFS_COMPRESS_LZO = 2,
655 BTRFS_COMPRESS_TYPES = 2,
656 BTRFS_COMPRESS_LAST = 3,
659 struct btrfs_inode_item {
660 /* nfs style generation number */
662 /* transid that last touched this inode */
674 /* modification sequence number for NFS */
678 * a little future expansion, for more than this we can
679 * just grow the inode item and version it
682 struct btrfs_timespec atime;
683 struct btrfs_timespec ctime;
684 struct btrfs_timespec mtime;
685 struct btrfs_timespec otime;
686 } __attribute__ ((__packed__));
688 struct btrfs_dir_log_item {
690 } __attribute__ ((__packed__));
692 struct btrfs_dir_item {
693 struct btrfs_disk_key location;
698 } __attribute__ ((__packed__));
700 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
702 struct btrfs_root_item {
703 struct btrfs_inode_item inode;
709 __le64 last_snapshot;
712 struct btrfs_disk_key drop_progress;
715 } __attribute__ ((__packed__));
718 * this is used for both forward and backward root refs
720 struct btrfs_root_ref {
724 } __attribute__ ((__packed__));
726 struct btrfs_disk_balance_args {
728 * profiles to operate on, single is denoted by
729 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
739 /* devid subset filter [pstart..pend) */
743 /* btrfs virtual address space subset filter [vstart..vend) */
748 * profile to convert to, single is denoted by
749 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
753 /* BTRFS_BALANCE_ARGS_* */
757 } __attribute__ ((__packed__));
760 * store balance parameters to disk so that balance can be properly
761 * resumed after crash or unmount
763 struct btrfs_balance_item {
764 /* BTRFS_BALANCE_* */
767 struct btrfs_disk_balance_args data;
768 struct btrfs_disk_balance_args meta;
769 struct btrfs_disk_balance_args sys;
772 } __attribute__ ((__packed__));
774 #define BTRFS_FILE_EXTENT_INLINE 0
775 #define BTRFS_FILE_EXTENT_REG 1
776 #define BTRFS_FILE_EXTENT_PREALLOC 2
778 struct btrfs_file_extent_item {
780 * transaction id that created this extent
784 * max number of bytes to hold this extent in ram
785 * when we split a compressed extent we can't know how big
786 * each of the resulting pieces will be. So, this is
787 * an upper limit on the size of the extent in ram instead of
793 * 32 bits for the various ways we might encode the data,
794 * including compression and encryption. If any of these
795 * are set to something a given disk format doesn't understand
796 * it is treated like an incompat flag for reading and writing,
801 __le16 other_encoding; /* spare for later use */
803 /* are we inline data or a real extent? */
807 * disk space consumed by the extent, checksum blocks are included
811 __le64 disk_num_bytes;
813 * the logical offset in file blocks (no csums)
814 * this extent record is for. This allows a file extent to point
815 * into the middle of an existing extent on disk, sharing it
816 * between two snapshots (useful if some bytes in the middle of the
817 * extent have changed
821 * the logical number of file blocks (no csums included). This
822 * always reflects the size uncompressed and without encoding.
826 } __attribute__ ((__packed__));
828 struct btrfs_csum_item {
830 } __attribute__ ((__packed__));
832 struct btrfs_dev_stats_item {
834 * grow this item struct at the end for future enhancements and keep
835 * the existing values unchanged
837 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
838 } __attribute__ ((__packed__));
840 /* different types of block groups (and chunks) */
841 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
842 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
843 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
844 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
845 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
846 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
847 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
848 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
849 #define BTRFS_NR_RAID_TYPES 5
851 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
852 BTRFS_BLOCK_GROUP_SYSTEM | \
853 BTRFS_BLOCK_GROUP_METADATA)
855 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
856 BTRFS_BLOCK_GROUP_RAID1 | \
857 BTRFS_BLOCK_GROUP_DUP | \
858 BTRFS_BLOCK_GROUP_RAID10)
860 * We need a bit for restriper to be able to tell when chunks of type
861 * SINGLE are available. This "extended" profile format is used in
862 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
863 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
864 * to avoid remappings between two formats in future.
866 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
868 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
869 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
871 static inline u64 chunk_to_extended(u64 flags)
873 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
874 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
878 static inline u64 extended_to_chunk(u64 flags)
880 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
883 struct btrfs_block_group_item {
885 __le64 chunk_objectid;
887 } __attribute__ ((__packed__));
890 * is subvolume quota turned on?
892 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
894 * SCANNING is set during the initialization phase
896 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
898 * Some qgroup entries are known to be out of date,
899 * either because the configuration has changed in a way that
900 * makes a rescan necessary, or because the fs has been mounted
901 * with a non-qgroup-aware version.
902 * Turning qouta off and on again makes it inconsistent, too.
904 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
906 #define BTRFS_QGROUP_STATUS_VERSION 1
908 struct btrfs_qgroup_status_item {
911 * the generation is updated during every commit. As older
912 * versions of btrfs are not aware of qgroups, it will be
913 * possible to detect inconsistencies by checking the
914 * generation on mount time
918 /* flag definitions see above */
922 * only used during scanning to record the progress
923 * of the scan. It contains a logical address
926 } __attribute__ ((__packed__));
928 struct btrfs_qgroup_info_item {
934 } __attribute__ ((__packed__));
936 /* flags definition for qgroup limits */
937 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
938 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
939 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
940 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
941 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
942 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
944 struct btrfs_qgroup_limit_item {
946 * only updated when any of the other values change
953 } __attribute__ ((__packed__));
955 struct btrfs_space_info {
958 u64 total_bytes; /* total bytes in the space,
959 this doesn't take mirrors into account */
960 u64 bytes_used; /* total bytes used,
961 this doesn't take mirrors into account */
962 u64 bytes_pinned; /* total bytes pinned, will be freed when the
963 transaction finishes */
964 u64 bytes_reserved; /* total bytes the allocator has reserved for
965 current allocations */
966 u64 bytes_readonly; /* total bytes that are read only */
968 u64 bytes_may_use; /* number of bytes that may be used for
969 delalloc/allocations */
970 u64 disk_used; /* total bytes used on disk */
971 u64 disk_total; /* total bytes on disk, takes mirrors into
975 * we bump reservation progress every time we decrement
976 * bytes_reserved. This way people waiting for reservations
977 * know something good has happened and they can check
978 * for progress. The number here isn't to be trusted, it
979 * just shows reclaim activity
981 unsigned long reservation_progress;
983 unsigned int full:1; /* indicates that we cannot allocate any more
984 chunks for this space */
985 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
987 unsigned int flush:1; /* set if we are trying to make space */
989 unsigned int force_alloc; /* set if we need to force a chunk
990 alloc for this space */
992 struct list_head list;
994 /* for block groups in our same type */
995 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
997 struct rw_semaphore groups_sem;
998 wait_queue_head_t wait;
1001 struct btrfs_block_rsv {
1004 struct btrfs_space_info *space_info;
1010 * free clusters are used to claim free space in relatively large chunks,
1011 * allowing us to do less seeky writes. They are used for all metadata
1012 * allocations and data allocations in ssd mode.
1014 struct btrfs_free_cluster {
1016 spinlock_t refill_lock;
1017 struct rb_root root;
1019 /* largest extent in this cluster */
1022 /* first extent starting offset */
1025 struct btrfs_block_group_cache *block_group;
1027 * when a cluster is allocated from a block group, we put the
1028 * cluster onto a list in the block group so that it can
1029 * be freed before the block group is freed.
1031 struct list_head block_group_list;
1034 enum btrfs_caching_type {
1036 BTRFS_CACHE_STARTED = 1,
1037 BTRFS_CACHE_FAST = 2,
1038 BTRFS_CACHE_FINISHED = 3,
1041 enum btrfs_disk_cache_state {
1042 BTRFS_DC_WRITTEN = 0,
1046 BTRFS_DC_NEED_WRITE = 4,
1049 struct btrfs_caching_control {
1050 struct list_head list;
1052 wait_queue_head_t wait;
1053 struct btrfs_work work;
1054 struct btrfs_block_group_cache *block_group;
1059 struct btrfs_block_group_cache {
1060 struct btrfs_key key;
1061 struct btrfs_block_group_item item;
1062 struct btrfs_fs_info *fs_info;
1063 struct inode *inode;
1070 u64 cache_generation;
1072 unsigned int dirty:1;
1073 unsigned int iref:1;
1075 int disk_cache_state;
1077 /* cache tracking stuff */
1079 struct btrfs_caching_control *caching_ctl;
1080 u64 last_byte_to_unpin;
1082 struct btrfs_space_info *space_info;
1084 /* free space cache stuff */
1085 struct btrfs_free_space_ctl *free_space_ctl;
1087 /* block group cache stuff */
1088 struct rb_node cache_node;
1090 /* for block groups in the same raid type */
1091 struct list_head list;
1096 /* List of struct btrfs_free_clusters for this block group.
1097 * Today it will only have one thing on it, but that may change
1099 struct list_head cluster_list;
1102 /* delayed seq elem */
1104 struct list_head list;
1109 struct reloc_control;
1110 struct btrfs_device;
1111 struct btrfs_fs_devices;
1112 struct btrfs_balance_control;
1113 struct btrfs_delayed_root;
1114 struct btrfs_fs_info {
1115 u8 fsid[BTRFS_FSID_SIZE];
1116 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1117 struct btrfs_root *extent_root;
1118 struct btrfs_root *tree_root;
1119 struct btrfs_root *chunk_root;
1120 struct btrfs_root *dev_root;
1121 struct btrfs_root *fs_root;
1122 struct btrfs_root *csum_root;
1123 struct btrfs_root *quota_root;
1125 /* the log root tree is a directory of all the other log roots */
1126 struct btrfs_root *log_root_tree;
1128 spinlock_t fs_roots_radix_lock;
1129 struct radix_tree_root fs_roots_radix;
1131 /* block group cache stuff */
1132 spinlock_t block_group_cache_lock;
1133 struct rb_root block_group_cache_tree;
1135 /* keep track of unallocated space */
1136 spinlock_t free_chunk_lock;
1137 u64 free_chunk_space;
1139 struct extent_io_tree freed_extents[2];
1140 struct extent_io_tree *pinned_extents;
1142 /* logical->physical extent mapping */
1143 struct btrfs_mapping_tree mapping_tree;
1146 * block reservation for extent, checksum, root tree and
1147 * delayed dir index item
1149 struct btrfs_block_rsv global_block_rsv;
1150 /* block reservation for delay allocation */
1151 struct btrfs_block_rsv delalloc_block_rsv;
1152 /* block reservation for metadata operations */
1153 struct btrfs_block_rsv trans_block_rsv;
1154 /* block reservation for chunk tree */
1155 struct btrfs_block_rsv chunk_block_rsv;
1156 /* block reservation for delayed operations */
1157 struct btrfs_block_rsv delayed_block_rsv;
1159 struct btrfs_block_rsv empty_block_rsv;
1162 u64 last_trans_committed;
1165 * this is updated to the current trans every time a full commit
1166 * is required instead of the faster short fsync log commits
1168 u64 last_trans_log_full_commit;
1169 unsigned long mount_opt;
1170 unsigned long compress_type:4;
1173 struct btrfs_transaction *running_transaction;
1174 wait_queue_head_t transaction_throttle;
1175 wait_queue_head_t transaction_wait;
1176 wait_queue_head_t transaction_blocked_wait;
1177 wait_queue_head_t async_submit_wait;
1179 struct btrfs_super_block *super_copy;
1180 struct btrfs_super_block *super_for_commit;
1181 struct block_device *__bdev;
1182 struct super_block *sb;
1183 struct inode *btree_inode;
1184 struct backing_dev_info bdi;
1185 struct mutex tree_log_mutex;
1186 struct mutex transaction_kthread_mutex;
1187 struct mutex cleaner_mutex;
1188 struct mutex chunk_mutex;
1189 struct mutex volume_mutex;
1191 * this protects the ordered operations list only while we are
1192 * processing all of the entries on it. This way we make
1193 * sure the commit code doesn't find the list temporarily empty
1194 * because another function happens to be doing non-waiting preflush
1195 * before jumping into the main commit.
1197 struct mutex ordered_operations_mutex;
1198 struct rw_semaphore extent_commit_sem;
1200 struct rw_semaphore cleanup_work_sem;
1202 struct rw_semaphore subvol_sem;
1203 struct srcu_struct subvol_srcu;
1205 spinlock_t trans_lock;
1207 * the reloc mutex goes with the trans lock, it is taken
1208 * during commit to protect us from the relocation code
1210 struct mutex reloc_mutex;
1212 struct list_head trans_list;
1213 struct list_head hashers;
1214 struct list_head dead_roots;
1215 struct list_head caching_block_groups;
1217 spinlock_t delayed_iput_lock;
1218 struct list_head delayed_iputs;
1220 /* this protects tree_mod_seq_list */
1221 spinlock_t tree_mod_seq_lock;
1222 atomic_t tree_mod_seq;
1223 struct list_head tree_mod_seq_list;
1224 struct seq_list tree_mod_seq_elem;
1225 wait_queue_head_t tree_mod_seq_wait;
1227 /* this protects tree_mod_log */
1228 rwlock_t tree_mod_log_lock;
1229 struct rb_root tree_mod_log;
1231 atomic_t nr_async_submits;
1232 atomic_t async_submit_draining;
1233 atomic_t nr_async_bios;
1234 atomic_t async_delalloc_pages;
1235 atomic_t open_ioctl_trans;
1238 * this is used by the balancing code to wait for all the pending
1241 spinlock_t ordered_extent_lock;
1244 * all of the data=ordered extents pending writeback
1245 * these can span multiple transactions and basically include
1246 * every dirty data page that isn't from nodatacow
1248 struct list_head ordered_extents;
1251 * all of the inodes that have delalloc bytes. It is possible for
1252 * this list to be empty even when there is still dirty data=ordered
1253 * extents waiting to finish IO.
1255 struct list_head delalloc_inodes;
1258 * special rename and truncate targets that must be on disk before
1259 * we're allowed to commit. This is basically the ext3 style
1260 * data=ordered list.
1262 struct list_head ordered_operations;
1265 * there is a pool of worker threads for checksumming during writes
1266 * and a pool for checksumming after reads. This is because readers
1267 * can run with FS locks held, and the writers may be waiting for
1268 * those locks. We don't want ordering in the pending list to cause
1269 * deadlocks, and so the two are serviced separately.
1271 * A third pool does submit_bio to avoid deadlocking with the other
1274 struct btrfs_workers generic_worker;
1275 struct btrfs_workers workers;
1276 struct btrfs_workers delalloc_workers;
1277 struct btrfs_workers endio_workers;
1278 struct btrfs_workers endio_meta_workers;
1279 struct btrfs_workers endio_meta_write_workers;
1280 struct btrfs_workers endio_write_workers;
1281 struct btrfs_workers endio_freespace_worker;
1282 struct btrfs_workers submit_workers;
1283 struct btrfs_workers caching_workers;
1284 struct btrfs_workers readahead_workers;
1287 * fixup workers take dirty pages that didn't properly go through
1288 * the cow mechanism and make them safe to write. It happens
1289 * for the sys_munmap function call path
1291 struct btrfs_workers fixup_workers;
1292 struct btrfs_workers delayed_workers;
1293 struct task_struct *transaction_kthread;
1294 struct task_struct *cleaner_kthread;
1295 int thread_pool_size;
1297 struct kobject super_kobj;
1298 struct completion kobj_unregister;
1301 int log_root_recovering;
1307 /* protected by the delalloc lock, used to keep from writing
1308 * metadata until there is a nice batch
1310 u64 dirty_metadata_bytes;
1311 struct list_head dirty_cowonly_roots;
1313 struct btrfs_fs_devices *fs_devices;
1316 * the space_info list is almost entirely read only. It only changes
1317 * when we add a new raid type to the FS, and that happens
1318 * very rarely. RCU is used to protect it.
1320 struct list_head space_info;
1322 struct reloc_control *reloc_ctl;
1324 spinlock_t delalloc_lock;
1327 /* data_alloc_cluster is only used in ssd mode */
1328 struct btrfs_free_cluster data_alloc_cluster;
1330 /* all metadata allocations go through this cluster */
1331 struct btrfs_free_cluster meta_alloc_cluster;
1333 /* auto defrag inodes go here */
1334 spinlock_t defrag_inodes_lock;
1335 struct rb_root defrag_inodes;
1336 atomic_t defrag_running;
1338 spinlock_t ref_cache_lock;
1339 u64 total_ref_cache_size;
1342 * these three are in extended format (availability of single
1343 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1344 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1346 u64 avail_data_alloc_bits;
1347 u64 avail_metadata_alloc_bits;
1348 u64 avail_system_alloc_bits;
1350 /* restriper state */
1351 spinlock_t balance_lock;
1352 struct mutex balance_mutex;
1353 atomic_t balance_running;
1354 atomic_t balance_pause_req;
1355 atomic_t balance_cancel_req;
1356 struct btrfs_balance_control *balance_ctl;
1357 wait_queue_head_t balance_wait_q;
1359 unsigned data_chunk_allocations;
1360 unsigned metadata_ratio;
1364 /* private scrub information */
1365 struct mutex scrub_lock;
1366 atomic_t scrubs_running;
1367 atomic_t scrub_pause_req;
1368 atomic_t scrubs_paused;
1369 atomic_t scrub_cancel_req;
1370 wait_queue_head_t scrub_pause_wait;
1371 struct rw_semaphore scrub_super_lock;
1372 int scrub_workers_refcnt;
1373 struct btrfs_workers scrub_workers;
1375 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1376 u32 check_integrity_print_mask;
1381 unsigned int quota_enabled:1;
1384 * quota_enabled only changes state after a commit. This holds the
1387 unsigned int pending_quota_state:1;
1389 /* is qgroup tracking in a consistent state? */
1392 /* holds configuration and tracking. Protected by qgroup_lock */
1393 struct rb_root qgroup_tree;
1394 spinlock_t qgroup_lock;
1396 /* list of dirty qgroups to be written at next commit */
1397 struct list_head dirty_qgroups;
1399 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1402 /* filesystem state */
1405 struct btrfs_delayed_root *delayed_root;
1407 /* readahead tree */
1408 spinlock_t reada_lock;
1409 struct radix_tree_root reada_tree;
1411 /* next backup root to be overwritten */
1412 int backup_root_index;
1416 * in ram representation of the tree. extent_root is used for all allocations
1417 * and for the extent tree extent_root root.
1420 struct extent_buffer *node;
1422 struct extent_buffer *commit_root;
1423 struct btrfs_root *log_root;
1424 struct btrfs_root *reloc_root;
1426 struct btrfs_root_item root_item;
1427 struct btrfs_key root_key;
1428 struct btrfs_fs_info *fs_info;
1429 struct extent_io_tree dirty_log_pages;
1431 struct kobject root_kobj;
1432 struct completion kobj_unregister;
1433 struct mutex objectid_mutex;
1435 spinlock_t accounting_lock;
1436 struct btrfs_block_rsv *block_rsv;
1438 /* free ino cache stuff */
1439 struct mutex fs_commit_mutex;
1440 struct btrfs_free_space_ctl *free_ino_ctl;
1441 enum btrfs_caching_type cached;
1442 spinlock_t cache_lock;
1443 wait_queue_head_t cache_wait;
1444 struct btrfs_free_space_ctl *free_ino_pinned;
1446 struct inode *cache_inode;
1448 struct mutex log_mutex;
1449 wait_queue_head_t log_writer_wait;
1450 wait_queue_head_t log_commit_wait[2];
1451 atomic_t log_writers;
1452 atomic_t log_commit[2];
1453 unsigned long log_transid;
1454 unsigned long last_log_commit;
1455 unsigned long log_batch;
1456 pid_t log_start_pid;
1457 bool log_multiple_pids;
1462 /* data allocations are done in sectorsize units */
1465 /* node allocations are done in nodesize units */
1468 /* leaf allocations are done in leafsize units */
1475 u64 highest_objectid;
1477 /* btrfs_record_root_in_trans is a multi-step process,
1478 * and it can race with the balancing code. But the
1479 * race is very small, and only the first time the root
1480 * is added to each transaction. So in_trans_setup
1481 * is used to tell us when more checks are required
1483 unsigned long in_trans_setup;
1488 u64 defrag_trans_start;
1489 struct btrfs_key defrag_progress;
1490 struct btrfs_key defrag_max;
1494 /* the dirty list is only used by non-reference counted roots */
1495 struct list_head dirty_list;
1497 struct list_head root_list;
1499 spinlock_t orphan_lock;
1500 atomic_t orphan_inodes;
1501 struct btrfs_block_rsv *orphan_block_rsv;
1502 int orphan_item_inserted;
1503 int orphan_cleanup_state;
1505 spinlock_t inode_lock;
1506 /* red-black tree that keeps track of in-memory inodes */
1507 struct rb_root inode_tree;
1510 * radix tree that keeps track of delayed nodes of every inode,
1511 * protected by inode_lock
1513 struct radix_tree_root delayed_nodes_tree;
1515 * right now this just gets used so that a root has its own devid
1516 * for stat. It may be used for more later
1523 struct btrfs_ioctl_defrag_range_args {
1524 /* start of the defrag operation */
1527 /* number of bytes to defrag, use (u64)-1 to say all */
1531 * flags for the operation, which can include turning
1532 * on compression for this one defrag
1537 * any extent bigger than this will be considered
1538 * already defragged. Use 0 to take the kernel default
1539 * Use 1 to say every single extent must be rewritten
1541 __u32 extent_thresh;
1544 * which compression method to use if turning on compression
1545 * for this defrag operation. If unspecified, zlib will
1548 __u32 compress_type;
1550 /* spare for later */
1556 * inode items have the data typically returned from stat and store other
1557 * info about object characteristics. There is one for every file and dir in
1560 #define BTRFS_INODE_ITEM_KEY 1
1561 #define BTRFS_INODE_REF_KEY 12
1562 #define BTRFS_XATTR_ITEM_KEY 24
1563 #define BTRFS_ORPHAN_ITEM_KEY 48
1564 /* reserve 2-15 close to the inode for later flexibility */
1567 * dir items are the name -> inode pointers in a directory. There is one
1568 * for every name in a directory.
1570 #define BTRFS_DIR_LOG_ITEM_KEY 60
1571 #define BTRFS_DIR_LOG_INDEX_KEY 72
1572 #define BTRFS_DIR_ITEM_KEY 84
1573 #define BTRFS_DIR_INDEX_KEY 96
1575 * extent data is for file data
1577 #define BTRFS_EXTENT_DATA_KEY 108
1580 * extent csums are stored in a separate tree and hold csums for
1581 * an entire extent on disk.
1583 #define BTRFS_EXTENT_CSUM_KEY 128
1586 * root items point to tree roots. They are typically in the root
1587 * tree used by the super block to find all the other trees
1589 #define BTRFS_ROOT_ITEM_KEY 132
1592 * root backrefs tie subvols and snapshots to the directory entries that
1595 #define BTRFS_ROOT_BACKREF_KEY 144
1598 * root refs make a fast index for listing all of the snapshots and
1599 * subvolumes referenced by a given root. They point directly to the
1600 * directory item in the root that references the subvol
1602 #define BTRFS_ROOT_REF_KEY 156
1605 * extent items are in the extent map tree. These record which blocks
1606 * are used, and how many references there are to each block
1608 #define BTRFS_EXTENT_ITEM_KEY 168
1610 #define BTRFS_TREE_BLOCK_REF_KEY 176
1612 #define BTRFS_EXTENT_DATA_REF_KEY 178
1614 #define BTRFS_EXTENT_REF_V0_KEY 180
1616 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1618 #define BTRFS_SHARED_DATA_REF_KEY 184
1621 * block groups give us hints into the extent allocation trees. Which
1622 * blocks are free etc etc
1624 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1626 #define BTRFS_DEV_EXTENT_KEY 204
1627 #define BTRFS_DEV_ITEM_KEY 216
1628 #define BTRFS_CHUNK_ITEM_KEY 228
1631 * Records the overall state of the qgroups.
1632 * There's only one instance of this key present,
1633 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1635 #define BTRFS_QGROUP_STATUS_KEY 240
1637 * Records the currently used space of the qgroup.
1638 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1640 #define BTRFS_QGROUP_INFO_KEY 242
1642 * Contains the user configured limits for the qgroup.
1643 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1645 #define BTRFS_QGROUP_LIMIT_KEY 244
1647 * Records the child-parent relationship of qgroups. For
1648 * each relation, 2 keys are present:
1649 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1650 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1652 #define BTRFS_QGROUP_RELATION_KEY 246
1654 #define BTRFS_BALANCE_ITEM_KEY 248
1657 * Persistantly stores the io stats in the device tree.
1658 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1660 #define BTRFS_DEV_STATS_KEY 249
1663 * string items are for debugging. They just store a short string of
1666 #define BTRFS_STRING_ITEM_KEY 253
1669 * Flags for mount options.
1671 * Note: don't forget to add new options to btrfs_show_options()
1673 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1674 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1675 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1676 #define BTRFS_MOUNT_SSD (1 << 3)
1677 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1678 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1679 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1680 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1681 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1682 #define BTRFS_MOUNT_NOSSD (1 << 9)
1683 #define BTRFS_MOUNT_DISCARD (1 << 10)
1684 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1685 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1686 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1687 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1688 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1689 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1690 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1691 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1692 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1693 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1694 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1695 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1697 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1698 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1699 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1704 #define BTRFS_INODE_NODATASUM (1 << 0)
1705 #define BTRFS_INODE_NODATACOW (1 << 1)
1706 #define BTRFS_INODE_READONLY (1 << 2)
1707 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1708 #define BTRFS_INODE_PREALLOC (1 << 4)
1709 #define BTRFS_INODE_SYNC (1 << 5)
1710 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1711 #define BTRFS_INODE_APPEND (1 << 7)
1712 #define BTRFS_INODE_NODUMP (1 << 8)
1713 #define BTRFS_INODE_NOATIME (1 << 9)
1714 #define BTRFS_INODE_DIRSYNC (1 << 10)
1715 #define BTRFS_INODE_COMPRESS (1 << 11)
1717 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1719 struct btrfs_map_token {
1720 struct extent_buffer *eb;
1722 unsigned long offset;
1725 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1727 memset(token, 0, sizeof(*token));
1730 /* some macros to generate set/get funcs for the struct fields. This
1731 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1734 #define le8_to_cpu(v) (v)
1735 #define cpu_to_le8(v) (v)
1738 #define read_eb_member(eb, ptr, type, member, result) ( \
1739 read_extent_buffer(eb, (char *)(result), \
1740 ((unsigned long)(ptr)) + \
1741 offsetof(type, member), \
1742 sizeof(((type *)0)->member)))
1744 #define write_eb_member(eb, ptr, type, member, result) ( \
1745 write_extent_buffer(eb, (char *)(result), \
1746 ((unsigned long)(ptr)) + \
1747 offsetof(type, member), \
1748 sizeof(((type *)0)->member)))
1750 #ifndef BTRFS_SETGET_FUNCS
1751 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1752 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1753 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1754 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1755 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1758 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1759 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1761 type *p = page_address(eb->pages[0]); \
1762 u##bits res = le##bits##_to_cpu(p->member); \
1765 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1768 type *p = page_address(eb->pages[0]); \
1769 p->member = cpu_to_le##bits(val); \
1772 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1773 static inline u##bits btrfs_##name(type *s) \
1775 return le##bits##_to_cpu(s->member); \
1777 static inline void btrfs_set_##name(type *s, u##bits val) \
1779 s->member = cpu_to_le##bits(val); \
1782 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1783 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1784 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1785 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1786 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1787 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1789 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1790 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1791 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1792 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1793 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1794 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1796 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1797 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1799 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1801 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1803 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1805 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1807 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1808 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1810 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1812 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1814 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1817 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1819 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1822 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1824 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1827 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1828 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1829 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1830 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1831 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1832 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1833 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1834 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1835 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1836 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1837 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1839 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1841 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1844 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1845 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1846 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1848 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1850 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1852 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1854 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1855 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1857 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1859 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1860 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1862 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1865 unsigned long offset = (unsigned long)c;
1866 offset += offsetof(struct btrfs_chunk, stripe);
1867 offset += nr * sizeof(struct btrfs_stripe);
1868 return (struct btrfs_stripe *)offset;
1871 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1873 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1876 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1877 struct btrfs_chunk *c, int nr)
1879 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1882 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1883 struct btrfs_chunk *c, int nr)
1885 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1888 /* struct btrfs_block_group_item */
1889 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1891 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1893 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1894 struct btrfs_block_group_item, chunk_objectid, 64);
1896 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1897 struct btrfs_block_group_item, chunk_objectid, 64);
1898 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1899 struct btrfs_block_group_item, flags, 64);
1900 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1901 struct btrfs_block_group_item, flags, 64);
1903 /* struct btrfs_inode_ref */
1904 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1905 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1907 /* struct btrfs_inode_item */
1908 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1909 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1910 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1911 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1912 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1913 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1914 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1915 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1916 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1917 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1918 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1919 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1921 static inline struct btrfs_timespec *
1922 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1924 unsigned long ptr = (unsigned long)inode_item;
1925 ptr += offsetof(struct btrfs_inode_item, atime);
1926 return (struct btrfs_timespec *)ptr;
1929 static inline struct btrfs_timespec *
1930 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1932 unsigned long ptr = (unsigned long)inode_item;
1933 ptr += offsetof(struct btrfs_inode_item, mtime);
1934 return (struct btrfs_timespec *)ptr;
1937 static inline struct btrfs_timespec *
1938 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1940 unsigned long ptr = (unsigned long)inode_item;
1941 ptr += offsetof(struct btrfs_inode_item, ctime);
1942 return (struct btrfs_timespec *)ptr;
1945 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1946 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1948 /* struct btrfs_dev_extent */
1949 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1951 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1952 chunk_objectid, 64);
1953 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1955 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1957 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1959 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1960 return (u8 *)((unsigned long)dev + ptr);
1963 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1964 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1966 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1968 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1971 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1973 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1974 struct btrfs_tree_block_info *item,
1975 struct btrfs_disk_key *key)
1977 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1980 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1981 struct btrfs_tree_block_info *item,
1982 struct btrfs_disk_key *key)
1984 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1987 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1989 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1991 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1993 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1996 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1999 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2001 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2004 static inline u32 btrfs_extent_inline_ref_size(int type)
2006 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2007 type == BTRFS_SHARED_BLOCK_REF_KEY)
2008 return sizeof(struct btrfs_extent_inline_ref);
2009 if (type == BTRFS_SHARED_DATA_REF_KEY)
2010 return sizeof(struct btrfs_shared_data_ref) +
2011 sizeof(struct btrfs_extent_inline_ref);
2012 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2013 return sizeof(struct btrfs_extent_data_ref) +
2014 offsetof(struct btrfs_extent_inline_ref, offset);
2019 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2020 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2022 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2023 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2025 /* struct btrfs_node */
2026 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2027 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2029 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2032 ptr = offsetof(struct btrfs_node, ptrs) +
2033 sizeof(struct btrfs_key_ptr) * nr;
2034 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2037 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2041 ptr = offsetof(struct btrfs_node, ptrs) +
2042 sizeof(struct btrfs_key_ptr) * nr;
2043 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2046 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2049 ptr = offsetof(struct btrfs_node, ptrs) +
2050 sizeof(struct btrfs_key_ptr) * nr;
2051 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2054 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2058 ptr = offsetof(struct btrfs_node, ptrs) +
2059 sizeof(struct btrfs_key_ptr) * nr;
2060 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2063 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2065 return offsetof(struct btrfs_node, ptrs) +
2066 sizeof(struct btrfs_key_ptr) * nr;
2069 void btrfs_node_key(struct extent_buffer *eb,
2070 struct btrfs_disk_key *disk_key, int nr);
2072 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2073 struct btrfs_disk_key *disk_key, int nr)
2076 ptr = btrfs_node_key_ptr_offset(nr);
2077 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2078 struct btrfs_key_ptr, key, disk_key);
2081 /* struct btrfs_item */
2082 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2083 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2085 static inline unsigned long btrfs_item_nr_offset(int nr)
2087 return offsetof(struct btrfs_leaf, items) +
2088 sizeof(struct btrfs_item) * nr;
2091 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2094 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2097 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2098 struct btrfs_item *item)
2100 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2103 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2105 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2108 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2110 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2113 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2115 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2118 static inline void btrfs_item_key(struct extent_buffer *eb,
2119 struct btrfs_disk_key *disk_key, int nr)
2121 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2122 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2125 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2126 struct btrfs_disk_key *disk_key, int nr)
2128 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2129 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2132 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2135 * struct btrfs_root_ref
2137 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2138 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2139 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2141 /* struct btrfs_dir_item */
2142 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2143 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2144 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2145 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2147 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2148 struct btrfs_dir_item *item,
2149 struct btrfs_disk_key *key)
2151 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2154 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2155 struct btrfs_dir_item *item,
2156 struct btrfs_disk_key *key)
2158 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2161 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2163 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2165 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2168 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2169 struct btrfs_free_space_header *h,
2170 struct btrfs_disk_key *key)
2172 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2175 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2176 struct btrfs_free_space_header *h,
2177 struct btrfs_disk_key *key)
2179 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2182 /* struct btrfs_disk_key */
2183 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2185 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2186 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2188 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2189 struct btrfs_disk_key *disk)
2191 cpu->offset = le64_to_cpu(disk->offset);
2192 cpu->type = disk->type;
2193 cpu->objectid = le64_to_cpu(disk->objectid);
2196 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2197 struct btrfs_key *cpu)
2199 disk->offset = cpu_to_le64(cpu->offset);
2200 disk->type = cpu->type;
2201 disk->objectid = cpu_to_le64(cpu->objectid);
2204 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2205 struct btrfs_key *key, int nr)
2207 struct btrfs_disk_key disk_key;
2208 btrfs_node_key(eb, &disk_key, nr);
2209 btrfs_disk_key_to_cpu(key, &disk_key);
2212 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2213 struct btrfs_key *key, int nr)
2215 struct btrfs_disk_key disk_key;
2216 btrfs_item_key(eb, &disk_key, nr);
2217 btrfs_disk_key_to_cpu(key, &disk_key);
2220 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2221 struct btrfs_dir_item *item,
2222 struct btrfs_key *key)
2224 struct btrfs_disk_key disk_key;
2225 btrfs_dir_item_key(eb, item, &disk_key);
2226 btrfs_disk_key_to_cpu(key, &disk_key);
2230 static inline u8 btrfs_key_type(struct btrfs_key *key)
2235 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2240 /* struct btrfs_header */
2241 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2242 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2244 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2245 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2246 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2247 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2249 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2251 return (btrfs_header_flags(eb) & flag) == flag;
2254 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2256 u64 flags = btrfs_header_flags(eb);
2257 btrfs_set_header_flags(eb, flags | flag);
2258 return (flags & flag) == flag;
2261 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2263 u64 flags = btrfs_header_flags(eb);
2264 btrfs_set_header_flags(eb, flags & ~flag);
2265 return (flags & flag) == flag;
2268 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2270 u64 flags = btrfs_header_flags(eb);
2271 return flags >> BTRFS_BACKREF_REV_SHIFT;
2274 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2277 u64 flags = btrfs_header_flags(eb);
2278 flags &= ~BTRFS_BACKREF_REV_MASK;
2279 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2280 btrfs_set_header_flags(eb, flags);
2283 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2285 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2289 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2291 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2295 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2297 return btrfs_header_level(eb) == 0;
2300 /* struct btrfs_root_item */
2301 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2303 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2304 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2305 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2307 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2309 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2310 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2311 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2312 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2313 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2314 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2315 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2316 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2319 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2321 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2324 /* struct btrfs_root_backup */
2325 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2327 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2329 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2330 tree_root_level, 8);
2332 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2334 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2335 chunk_root_gen, 64);
2336 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2337 chunk_root_level, 8);
2339 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2341 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2342 extent_root_gen, 64);
2343 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2344 extent_root_level, 8);
2346 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2348 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2350 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2353 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2355 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2357 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2360 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2362 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2364 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2365 csum_root_level, 8);
2366 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2368 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2370 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2373 /* struct btrfs_balance_item */
2374 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2376 static inline void btrfs_balance_data(struct extent_buffer *eb,
2377 struct btrfs_balance_item *bi,
2378 struct btrfs_disk_balance_args *ba)
2380 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2383 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2384 struct btrfs_balance_item *bi,
2385 struct btrfs_disk_balance_args *ba)
2387 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2390 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2391 struct btrfs_balance_item *bi,
2392 struct btrfs_disk_balance_args *ba)
2394 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2397 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2398 struct btrfs_balance_item *bi,
2399 struct btrfs_disk_balance_args *ba)
2401 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2404 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2405 struct btrfs_balance_item *bi,
2406 struct btrfs_disk_balance_args *ba)
2408 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2411 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2412 struct btrfs_balance_item *bi,
2413 struct btrfs_disk_balance_args *ba)
2415 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2419 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2420 struct btrfs_disk_balance_args *disk)
2422 memset(cpu, 0, sizeof(*cpu));
2424 cpu->profiles = le64_to_cpu(disk->profiles);
2425 cpu->usage = le64_to_cpu(disk->usage);
2426 cpu->devid = le64_to_cpu(disk->devid);
2427 cpu->pstart = le64_to_cpu(disk->pstart);
2428 cpu->pend = le64_to_cpu(disk->pend);
2429 cpu->vstart = le64_to_cpu(disk->vstart);
2430 cpu->vend = le64_to_cpu(disk->vend);
2431 cpu->target = le64_to_cpu(disk->target);
2432 cpu->flags = le64_to_cpu(disk->flags);
2436 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2437 struct btrfs_balance_args *cpu)
2439 memset(disk, 0, sizeof(*disk));
2441 disk->profiles = cpu_to_le64(cpu->profiles);
2442 disk->usage = cpu_to_le64(cpu->usage);
2443 disk->devid = cpu_to_le64(cpu->devid);
2444 disk->pstart = cpu_to_le64(cpu->pstart);
2445 disk->pend = cpu_to_le64(cpu->pend);
2446 disk->vstart = cpu_to_le64(cpu->vstart);
2447 disk->vend = cpu_to_le64(cpu->vend);
2448 disk->target = cpu_to_le64(cpu->target);
2449 disk->flags = cpu_to_le64(cpu->flags);
2452 /* struct btrfs_super_block */
2453 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2454 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2455 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2457 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2458 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2459 struct btrfs_super_block, sys_chunk_array_size, 32);
2460 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2461 struct btrfs_super_block, chunk_root_generation, 64);
2462 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2464 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2466 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2467 chunk_root_level, 8);
2468 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2470 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2471 log_root_transid, 64);
2472 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2474 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2476 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2478 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2480 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2482 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2484 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2486 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2487 root_dir_objectid, 64);
2488 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2490 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2492 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2493 compat_ro_flags, 64);
2494 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2495 incompat_flags, 64);
2496 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2498 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2499 cache_generation, 64);
2501 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2503 int t = btrfs_super_csum_type(s);
2504 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2505 return btrfs_csum_sizes[t];
2508 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2510 return offsetof(struct btrfs_leaf, items);
2513 /* struct btrfs_file_extent_item */
2514 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2516 static inline unsigned long
2517 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2519 unsigned long offset = (unsigned long)e;
2520 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2524 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2526 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2529 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2531 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2533 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2534 disk_num_bytes, 64);
2535 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2537 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2539 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2541 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2543 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2545 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2546 other_encoding, 16);
2548 /* this returns the number of file bytes represented by the inline item.
2549 * If an item is compressed, this is the uncompressed size
2551 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2552 struct btrfs_file_extent_item *e)
2554 return btrfs_file_extent_ram_bytes(eb, e);
2558 * this returns the number of bytes used by the item on disk, minus the
2559 * size of any extent headers. If a file is compressed on disk, this is
2560 * the compressed size
2562 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2563 struct btrfs_item *e)
2565 unsigned long offset;
2566 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2567 return btrfs_item_size(eb, e) - offset;
2570 /* btrfs_dev_stats_item */
2571 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2572 struct btrfs_dev_stats_item *ptr,
2577 read_extent_buffer(eb, &val,
2578 offsetof(struct btrfs_dev_stats_item, values) +
2579 ((unsigned long)ptr) + (index * sizeof(u64)),
2584 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2585 struct btrfs_dev_stats_item *ptr,
2588 write_extent_buffer(eb, &val,
2589 offsetof(struct btrfs_dev_stats_item, values) +
2590 ((unsigned long)ptr) + (index * sizeof(u64)),
2594 /* btrfs_qgroup_status_item */
2595 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2597 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2599 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2601 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2604 /* btrfs_qgroup_info_item */
2605 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2607 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2608 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2610 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2611 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2614 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2615 struct btrfs_qgroup_info_item, generation, 64);
2616 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2618 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2619 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2620 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2622 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2623 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2625 /* btrfs_qgroup_limit_item */
2626 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2628 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2630 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2632 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2634 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2637 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2639 return sb->s_fs_info;
2642 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2645 return root->leafsize;
2646 return root->nodesize;
2649 /* helper function to cast into the data area of the leaf. */
2650 #define btrfs_item_ptr(leaf, slot, type) \
2651 ((type *)(btrfs_leaf_data(leaf) + \
2652 btrfs_item_offset_nr(leaf, slot)))
2654 #define btrfs_item_ptr_offset(leaf, slot) \
2655 ((unsigned long)(btrfs_leaf_data(leaf) + \
2656 btrfs_item_offset_nr(leaf, slot)))
2658 static inline struct dentry *fdentry(struct file *file)
2660 return file->f_path.dentry;
2663 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2665 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2666 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2669 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2671 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2675 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2678 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2683 * Doing a truncate won't result in new nodes or leaves, just what we need for
2686 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2689 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2693 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2694 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2695 struct btrfs_root *root, unsigned long count);
2696 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2697 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root, u64 bytenr,
2699 u64 num_bytes, u64 *refs, u64 *flags);
2700 int btrfs_pin_extent(struct btrfs_root *root,
2701 u64 bytenr, u64 num, int reserved);
2702 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root,
2704 u64 bytenr, u64 num_bytes);
2705 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2706 struct btrfs_root *root,
2707 u64 objectid, u64 offset, u64 bytenr);
2708 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2709 struct btrfs_fs_info *info,
2711 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2712 u64 btrfs_find_block_group(struct btrfs_root *root,
2713 u64 search_start, u64 search_hint, int owner);
2714 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root, u32 blocksize,
2716 u64 parent, u64 root_objectid,
2717 struct btrfs_disk_key *key, int level,
2718 u64 hint, u64 empty_size);
2719 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root,
2721 struct extent_buffer *buf,
2722 u64 parent, int last_ref);
2723 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root,
2725 u64 bytenr, u32 blocksize,
2727 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root,
2729 u64 root_objectid, u64 owner,
2730 u64 offset, struct btrfs_key *ins);
2731 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root,
2733 u64 root_objectid, u64 owner, u64 offset,
2734 struct btrfs_key *ins);
2735 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2736 struct btrfs_root *root,
2737 u64 num_bytes, u64 min_alloc_size,
2738 u64 empty_size, u64 hint_byte,
2739 struct btrfs_key *ins, u64 data);
2740 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2741 struct extent_buffer *buf, int full_backref, int for_cow);
2742 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2743 struct extent_buffer *buf, int full_backref, int for_cow);
2744 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2745 struct btrfs_root *root,
2746 u64 bytenr, u64 num_bytes, u64 flags,
2748 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2749 struct btrfs_root *root,
2750 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2751 u64 owner, u64 offset, int for_cow);
2753 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2754 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2755 u64 start, u64 len);
2756 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root);
2758 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2759 struct btrfs_root *root);
2760 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root,
2762 u64 bytenr, u64 num_bytes, u64 parent,
2763 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2765 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2766 struct btrfs_root *root);
2767 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2768 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2769 int btrfs_read_block_groups(struct btrfs_root *root);
2770 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2771 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2772 struct btrfs_root *root, u64 bytes_used,
2773 u64 type, u64 chunk_objectid, u64 chunk_offset,
2775 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2776 struct btrfs_root *root, u64 group_start);
2777 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2778 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2779 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2780 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2781 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2782 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2783 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root);
2785 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2786 struct inode *inode);
2787 void btrfs_orphan_release_metadata(struct inode *inode);
2788 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2789 struct btrfs_pending_snapshot *pending);
2790 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2791 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2792 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2793 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2794 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2795 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2796 void btrfs_free_block_rsv(struct btrfs_root *root,
2797 struct btrfs_block_rsv *rsv);
2798 int btrfs_block_rsv_add(struct btrfs_root *root,
2799 struct btrfs_block_rsv *block_rsv,
2801 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2802 struct btrfs_block_rsv *block_rsv,
2804 int btrfs_block_rsv_check(struct btrfs_root *root,
2805 struct btrfs_block_rsv *block_rsv, int min_factor);
2806 int btrfs_block_rsv_refill(struct btrfs_root *root,
2807 struct btrfs_block_rsv *block_rsv,
2809 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2810 struct btrfs_block_rsv *block_rsv,
2812 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2813 struct btrfs_block_rsv *dst_rsv,
2815 void btrfs_block_rsv_release(struct btrfs_root *root,
2816 struct btrfs_block_rsv *block_rsv,
2818 int btrfs_set_block_group_ro(struct btrfs_root *root,
2819 struct btrfs_block_group_cache *cache);
2820 void btrfs_set_block_group_rw(struct btrfs_root *root,
2821 struct btrfs_block_group_cache *cache);
2822 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2823 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2824 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2825 u64 start, u64 end);
2826 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2827 u64 num_bytes, u64 *actual_bytes);
2828 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2829 struct btrfs_root *root, u64 type);
2830 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2832 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2834 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2835 int level, int *slot);
2836 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2837 int btrfs_previous_item(struct btrfs_root *root,
2838 struct btrfs_path *path, u64 min_objectid,
2840 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2841 struct btrfs_root *root, struct btrfs_path *path,
2842 struct btrfs_key *new_key);
2843 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2844 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2845 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2846 struct btrfs_key *key, int lowest_level,
2847 int cache_only, u64 min_trans);
2848 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2849 struct btrfs_key *max_key,
2850 struct btrfs_path *path, int cache_only,
2852 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2853 struct btrfs_root *root, struct extent_buffer *buf,
2854 struct extent_buffer *parent, int parent_slot,
2855 struct extent_buffer **cow_ret);
2856 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root,
2858 struct extent_buffer *buf,
2859 struct extent_buffer **cow_ret, u64 new_root_objectid);
2860 int btrfs_block_can_be_shared(struct btrfs_root *root,
2861 struct extent_buffer *buf);
2862 void btrfs_extend_item(struct btrfs_trans_handle *trans,
2863 struct btrfs_root *root, struct btrfs_path *path,
2865 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2866 struct btrfs_root *root,
2867 struct btrfs_path *path,
2868 u32 new_size, int from_end);
2869 int btrfs_split_item(struct btrfs_trans_handle *trans,
2870 struct btrfs_root *root,
2871 struct btrfs_path *path,
2872 struct btrfs_key *new_key,
2873 unsigned long split_offset);
2874 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2875 struct btrfs_root *root,
2876 struct btrfs_path *path,
2877 struct btrfs_key *new_key);
2878 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2879 *root, struct btrfs_key *key, struct btrfs_path *p, int
2881 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2882 struct btrfs_path *p, u64 time_seq);
2883 int btrfs_search_slot_for_read(struct btrfs_root *root,
2884 struct btrfs_key *key, struct btrfs_path *p,
2885 int find_higher, int return_any);
2886 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2887 struct btrfs_root *root, struct extent_buffer *parent,
2888 int start_slot, int cache_only, u64 *last_ret,
2889 struct btrfs_key *progress);
2890 void btrfs_release_path(struct btrfs_path *p);
2891 struct btrfs_path *btrfs_alloc_path(void);
2892 void btrfs_free_path(struct btrfs_path *p);
2893 void btrfs_set_path_blocking(struct btrfs_path *p);
2894 void btrfs_clear_path_blocking(struct btrfs_path *p,
2895 struct extent_buffer *held, int held_rw);
2896 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2898 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2899 struct btrfs_path *path, int slot, int nr);
2900 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2901 struct btrfs_root *root,
2902 struct btrfs_path *path)
2904 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2907 void setup_items_for_insert(struct btrfs_trans_handle *trans,
2908 struct btrfs_root *root, struct btrfs_path *path,
2909 struct btrfs_key *cpu_key, u32 *data_size,
2910 u32 total_data, u32 total_size, int nr);
2911 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2912 *root, struct btrfs_key *key, void *data, u32 data_size);
2913 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2914 struct btrfs_root *root,
2915 struct btrfs_path *path,
2916 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2918 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2919 struct btrfs_root *root,
2920 struct btrfs_path *path,
2921 struct btrfs_key *key,
2924 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2927 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2928 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2930 static inline int btrfs_next_old_item(struct btrfs_root *root,
2931 struct btrfs_path *p, u64 time_seq)
2934 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2935 return btrfs_next_old_leaf(root, p, time_seq);
2938 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2940 return btrfs_next_old_item(root, p, 0);
2942 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2943 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2944 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2945 struct btrfs_block_rsv *block_rsv,
2946 int update_ref, int for_reloc);
2947 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2948 struct btrfs_root *root,
2949 struct extent_buffer *node,
2950 struct extent_buffer *parent);
2951 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2954 * Get synced with close_ctree()
2957 return fs_info->closing;
2959 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2961 kfree(fs_info->balance_ctl);
2962 kfree(fs_info->delayed_root);
2963 kfree(fs_info->extent_root);
2964 kfree(fs_info->tree_root);
2965 kfree(fs_info->chunk_root);
2966 kfree(fs_info->dev_root);
2967 kfree(fs_info->csum_root);
2968 kfree(fs_info->super_copy);
2969 kfree(fs_info->super_for_commit);
2973 /* tree mod log functions from ctree.c */
2974 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2975 struct seq_list *elem);
2976 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2977 struct seq_list *elem);
2978 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
2980 return atomic_inc_return(&fs_info->tree_mod_seq);
2984 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2985 struct btrfs_path *path,
2986 u64 root_id, u64 ref_id);
2987 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2988 struct btrfs_root *tree_root,
2989 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2990 const char *name, int name_len);
2991 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *tree_root,
2993 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2994 const char *name, int name_len);
2995 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2996 struct btrfs_key *key);
2997 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2998 *root, struct btrfs_key *key, struct btrfs_root_item
3000 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3001 struct btrfs_root *root,
3002 struct btrfs_key *key,
3003 struct btrfs_root_item *item);
3004 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3005 btrfs_root_item *item, struct btrfs_key *key);
3006 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3007 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3008 void btrfs_set_root_node(struct btrfs_root_item *item,
3009 struct extent_buffer *node);
3010 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3013 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3014 struct btrfs_root *root, const char *name,
3015 int name_len, struct inode *dir,
3016 struct btrfs_key *location, u8 type, u64 index);
3017 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3018 struct btrfs_root *root,
3019 struct btrfs_path *path, u64 dir,
3020 const char *name, int name_len,
3022 struct btrfs_dir_item *
3023 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root,
3025 struct btrfs_path *path, u64 dir,
3026 u64 objectid, const char *name, int name_len,
3028 struct btrfs_dir_item *
3029 btrfs_search_dir_index_item(struct btrfs_root *root,
3030 struct btrfs_path *path, u64 dirid,
3031 const char *name, int name_len);
3032 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3033 struct btrfs_path *path,
3034 const char *name, int name_len);
3035 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3036 struct btrfs_root *root,
3037 struct btrfs_path *path,
3038 struct btrfs_dir_item *di);
3039 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3040 struct btrfs_root *root,
3041 struct btrfs_path *path, u64 objectid,
3042 const char *name, u16 name_len,
3043 const void *data, u16 data_len);
3044 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3045 struct btrfs_root *root,
3046 struct btrfs_path *path, u64 dir,
3047 const char *name, u16 name_len,
3049 int verify_dir_item(struct btrfs_root *root,
3050 struct extent_buffer *leaf,
3051 struct btrfs_dir_item *dir_item);
3054 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3055 struct btrfs_root *root, u64 offset);
3056 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root, u64 offset);
3058 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3061 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root,
3063 const char *name, int name_len,
3064 u64 inode_objectid, u64 ref_objectid, u64 index);
3065 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 const char *name, int name_len,
3068 u64 inode_objectid, u64 ref_objectid, u64 *index);
3069 struct btrfs_inode_ref *
3070 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
3071 struct btrfs_root *root,
3072 struct btrfs_path *path,
3073 const char *name, int name_len,
3074 u64 inode_objectid, u64 ref_objectid, int mod);
3075 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3076 struct btrfs_root *root,
3077 struct btrfs_path *path, u64 objectid);
3078 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3079 *root, struct btrfs_path *path,
3080 struct btrfs_key *location, int mod);
3083 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root, u64 bytenr, u64 len);
3085 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3086 struct bio *bio, u32 *dst);
3087 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3088 struct bio *bio, u64 logical_offset, u32 *dst);
3089 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3090 struct btrfs_root *root,
3091 u64 objectid, u64 pos,
3092 u64 disk_offset, u64 disk_num_bytes,
3093 u64 num_bytes, u64 offset, u64 ram_bytes,
3094 u8 compression, u8 encryption, u16 other_encoding);
3095 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3096 struct btrfs_root *root,
3097 struct btrfs_path *path, u64 objectid,
3098 u64 bytenr, int mod);
3099 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3100 struct btrfs_root *root,
3101 struct btrfs_ordered_sum *sums);
3102 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3103 struct bio *bio, u64 file_start, int contig);
3104 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *root,
3106 struct btrfs_path *path,
3107 u64 bytenr, int cow);
3108 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3109 struct btrfs_root *root, struct btrfs_path *path,
3111 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3112 struct list_head *list, int search_commit);
3114 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3115 size_t pg_offset, u64 start, u64 len,
3118 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3119 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3120 #define ClearPageChecked ClearPageFsMisc
3121 #define SetPageChecked SetPageFsMisc
3122 #define PageChecked PageFsMisc
3125 /* This forces readahead on a given range of bytes in an inode */
3126 static inline void btrfs_force_ra(struct address_space *mapping,
3127 struct file_ra_state *ra, struct file *file,
3128 pgoff_t offset, unsigned long req_size)
3130 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3133 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3134 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3135 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3136 struct btrfs_root *root,
3137 struct inode *dir, struct inode *inode,
3138 const char *name, int name_len);
3139 int btrfs_add_link(struct btrfs_trans_handle *trans,
3140 struct inode *parent_inode, struct inode *inode,
3141 const char *name, int name_len, int add_backref, u64 index);
3142 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3143 struct btrfs_root *root,
3144 struct inode *dir, u64 objectid,
3145 const char *name, int name_len);
3146 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3147 struct btrfs_root *root,
3148 struct inode *inode, u64 new_size,
3151 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3152 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3153 struct extent_state **cached_state);
3154 int btrfs_writepages(struct address_space *mapping,
3155 struct writeback_control *wbc);
3156 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3157 struct btrfs_root *new_root, u64 new_dirid);
3158 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3159 size_t size, struct bio *bio, unsigned long bio_flags);
3161 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3162 int btrfs_readpage(struct file *file, struct page *page);
3163 void btrfs_evict_inode(struct inode *inode);
3164 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3165 int btrfs_dirty_inode(struct inode *inode);
3166 int btrfs_update_time(struct file *file);
3167 struct inode *btrfs_alloc_inode(struct super_block *sb);
3168 void btrfs_destroy_inode(struct inode *inode);
3169 int btrfs_drop_inode(struct inode *inode);
3170 int btrfs_init_cachep(void);
3171 void btrfs_destroy_cachep(void);
3172 long btrfs_ioctl_trans_end(struct file *file);
3173 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3174 struct btrfs_root *root, int *was_new);
3175 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3176 size_t pg_offset, u64 start, u64 end,
3178 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3179 struct btrfs_root *root,
3180 struct inode *inode);
3181 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3182 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3183 int btrfs_orphan_cleanup(struct btrfs_root *root);
3184 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3185 struct btrfs_root *root);
3186 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3187 void btrfs_invalidate_inodes(struct btrfs_root *root);
3188 void btrfs_add_delayed_iput(struct inode *inode);
3189 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3190 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3191 u64 start, u64 num_bytes, u64 min_size,
3192 loff_t actual_len, u64 *alloc_hint);
3193 int btrfs_prealloc_file_range_trans(struct inode *inode,
3194 struct btrfs_trans_handle *trans, int mode,
3195 u64 start, u64 num_bytes, u64 min_size,
3196 loff_t actual_len, u64 *alloc_hint);
3197 extern const struct dentry_operations btrfs_dentry_operations;
3200 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3201 void btrfs_update_iflags(struct inode *inode);
3202 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3203 int btrfs_defrag_file(struct inode *inode, struct file *file,
3204 struct btrfs_ioctl_defrag_range_args *range,
3205 u64 newer_than, unsigned long max_pages);
3207 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3208 struct inode *inode);
3209 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3210 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3211 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3213 extern const struct file_operations btrfs_file_operations;
3214 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
3215 u64 start, u64 end, u64 *hint_byte, int drop_cache);
3216 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3217 struct inode *inode, u64 start, u64 end);
3218 int btrfs_release_file(struct inode *inode, struct file *file);
3219 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3220 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3221 struct page **pages, size_t num_pages,
3222 loff_t pos, size_t write_bytes,
3223 struct extent_state **cached);
3226 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root, int cache_only);
3230 int btrfs_init_sysfs(void);
3231 void btrfs_exit_sysfs(void);
3234 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3237 int btrfs_parse_options(struct btrfs_root *root, char *options);
3238 int btrfs_sync_fs(struct super_block *sb, int wait);
3239 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3240 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3241 unsigned int line, int errno, const char *fmt, ...);
3243 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3244 struct btrfs_root *root, const char *function,
3245 unsigned int line, int errno);
3247 #define btrfs_abort_transaction(trans, root, errno) \
3249 __btrfs_abort_transaction(trans, root, __func__, \
3253 #define btrfs_std_error(fs_info, errno) \
3256 __btrfs_std_error((fs_info), __func__, \
3257 __LINE__, (errno), NULL); \
3260 #define btrfs_error(fs_info, errno, fmt, args...) \
3262 __btrfs_std_error((fs_info), __func__, __LINE__, \
3263 (errno), fmt, ##args); \
3266 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3267 unsigned int line, int errno, const char *fmt, ...);
3269 #define btrfs_panic(fs_info, errno, fmt, args...) \
3271 struct btrfs_fs_info *_i = (fs_info); \
3272 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3273 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3277 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3278 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3279 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3280 struct inode *inode, struct inode *dir);
3281 int btrfs_acl_chmod(struct inode *inode);
3283 #define btrfs_get_acl NULL
3284 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3285 struct inode *inode, struct inode *dir)
3289 static inline int btrfs_acl_chmod(struct inode *inode)
3296 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3297 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root);
3299 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3300 struct btrfs_root *root);
3301 int btrfs_recover_relocation(struct btrfs_root *root);
3302 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3303 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3304 struct btrfs_root *root, struct extent_buffer *buf,
3305 struct extent_buffer *cow);
3306 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3307 struct btrfs_pending_snapshot *pending,
3308 u64 *bytes_to_reserve);
3309 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3310 struct btrfs_pending_snapshot *pending);
3313 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3314 struct btrfs_scrub_progress *progress, int readonly);
3315 void btrfs_scrub_pause(struct btrfs_root *root);
3316 void btrfs_scrub_pause_super(struct btrfs_root *root);
3317 void btrfs_scrub_continue(struct btrfs_root *root);
3318 void btrfs_scrub_continue_super(struct btrfs_root *root);
3319 int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
3320 int btrfs_scrub_cancel(struct btrfs_root *root);
3321 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3322 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3323 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3324 struct btrfs_scrub_progress *progress);
3327 struct reada_control {
3328 struct btrfs_root *root; /* tree to prefetch */
3329 struct btrfs_key key_start;
3330 struct btrfs_key key_end; /* exclusive */
3333 wait_queue_head_t wait;
3335 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3336 struct btrfs_key *start, struct btrfs_key *end);
3337 int btrfs_reada_wait(void *handle);
3338 void btrfs_reada_detach(void *handle);
3339 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3340 u64 start, int err);
3342 static inline int is_fstree(u64 rootid)
3344 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3345 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)