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 <linux/btrfs.h>
35 #include "extent_io.h"
36 #include "extent_map.h"
37 #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 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
51 #define BTRFS_MAX_MIRRORS 3
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 storing
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
145 #define BTRFS_DEV_REPLACE_DEVID 0
148 * the max metadata block size. This limit is somewhat artificial,
149 * but the memmove costs go through the roof for larger blocks.
151 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
154 * we can actually store much bigger names, but lets not confuse the rest
157 #define BTRFS_NAME_LEN 255
160 * Theoretical limit is larger, but we keep this down to a sane
161 * value. That should limit greatly the possibility of collisions on
164 #define BTRFS_LINK_MAX 65535U
166 /* 32 bytes in various csum fields */
167 #define BTRFS_CSUM_SIZE 32
170 #define BTRFS_CSUM_TYPE_CRC32 0
172 static int btrfs_csum_sizes[] = { 4, 0 };
174 /* four bytes for CRC32 */
175 #define BTRFS_EMPTY_DIR_SIZE 0
177 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
178 #define REQ_GET_READ_MIRRORS (1 << 30)
180 #define BTRFS_FT_UNKNOWN 0
181 #define BTRFS_FT_REG_FILE 1
182 #define BTRFS_FT_DIR 2
183 #define BTRFS_FT_CHRDEV 3
184 #define BTRFS_FT_BLKDEV 4
185 #define BTRFS_FT_FIFO 5
186 #define BTRFS_FT_SOCK 6
187 #define BTRFS_FT_SYMLINK 7
188 #define BTRFS_FT_XATTR 8
189 #define BTRFS_FT_MAX 9
191 /* ioprio of readahead is set to idle */
192 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
194 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
197 * The key defines the order in the tree, and so it also defines (optimal)
200 * objectid corresponds to the inode number.
202 * type tells us things about the object, and is a kind of stream selector.
203 * so for a given inode, keys with type of 1 might refer to the inode data,
204 * type of 2 may point to file data in the btree and type == 3 may point to
207 * offset is the starting byte offset for this key in the stream.
209 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
210 * in cpu native order. Otherwise they are identical and their sizes
211 * should be the same (ie both packed)
213 struct btrfs_disk_key {
217 } __attribute__ ((__packed__));
223 } __attribute__ ((__packed__));
225 struct btrfs_mapping_tree {
226 struct extent_map_tree map_tree;
229 struct btrfs_dev_item {
230 /* the internal btrfs device id */
233 /* size of the device */
239 /* optimal io alignment for this device */
242 /* optimal io width for this device */
245 /* minimal io size for this device */
248 /* type and info about this device */
251 /* expected generation for this device */
255 * starting byte of this partition on the device,
256 * to allow for stripe alignment in the future
260 /* grouping information for allocation decisions */
263 /* seek speed 0-100 where 100 is fastest */
266 /* bandwidth 0-100 where 100 is fastest */
269 /* btrfs generated uuid for this device */
270 u8 uuid[BTRFS_UUID_SIZE];
272 /* uuid of FS who owns this device */
273 u8 fsid[BTRFS_UUID_SIZE];
274 } __attribute__ ((__packed__));
276 struct btrfs_stripe {
279 u8 dev_uuid[BTRFS_UUID_SIZE];
280 } __attribute__ ((__packed__));
283 /* size of this chunk in bytes */
286 /* objectid of the root referencing this chunk */
292 /* optimal io alignment for this chunk */
295 /* optimal io width for this chunk */
298 /* minimal io size for this chunk */
301 /* 2^16 stripes is quite a lot, a second limit is the size of a single
306 /* sub stripes only matter for raid10 */
308 struct btrfs_stripe stripe;
309 /* additional stripes go here */
310 } __attribute__ ((__packed__));
312 #define BTRFS_FREE_SPACE_EXTENT 1
313 #define BTRFS_FREE_SPACE_BITMAP 2
315 struct btrfs_free_space_entry {
319 } __attribute__ ((__packed__));
321 struct btrfs_free_space_header {
322 struct btrfs_disk_key location;
326 } __attribute__ ((__packed__));
328 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
330 BUG_ON(num_stripes == 0);
331 return sizeof(struct btrfs_chunk) +
332 sizeof(struct btrfs_stripe) * (num_stripes - 1);
335 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
336 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
341 #define BTRFS_FS_STATE_ERROR 0
343 /* Super block flags */
344 /* Errors detected */
345 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
347 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
348 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
350 #define BTRFS_BACKREF_REV_MAX 256
351 #define BTRFS_BACKREF_REV_SHIFT 56
352 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
353 BTRFS_BACKREF_REV_SHIFT)
355 #define BTRFS_OLD_BACKREF_REV 0
356 #define BTRFS_MIXED_BACKREF_REV 1
359 * every tree block (leaf or node) starts with this header.
361 struct btrfs_header {
362 /* these first four must match the super block */
363 u8 csum[BTRFS_CSUM_SIZE];
364 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
365 __le64 bytenr; /* which block this node is supposed to live in */
368 /* allowed to be different from the super from here on down */
369 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
374 } __attribute__ ((__packed__));
376 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
377 sizeof(struct btrfs_header)) / \
378 sizeof(struct btrfs_key_ptr))
379 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
380 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
381 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
382 sizeof(struct btrfs_item) - \
383 sizeof(struct btrfs_file_extent_item))
384 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
385 sizeof(struct btrfs_item) -\
386 sizeof(struct btrfs_dir_item))
390 * this is a very generous portion of the super block, giving us
391 * room to translate 14 chunks with 3 stripes each.
393 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
394 #define BTRFS_LABEL_SIZE 256
397 * just in case we somehow lose the roots and are not able to mount,
398 * we store an array of the roots from previous transactions
401 #define BTRFS_NUM_BACKUP_ROOTS 4
402 struct btrfs_root_backup {
404 __le64 tree_root_gen;
407 __le64 chunk_root_gen;
410 __le64 extent_root_gen;
419 __le64 csum_root_gen;
429 u8 extent_root_level;
433 /* future and to align */
435 } __attribute__ ((__packed__));
438 * the super block basically lists the main trees of the FS
439 * it currently lacks any block count etc etc
441 struct btrfs_super_block {
442 u8 csum[BTRFS_CSUM_SIZE];
443 /* the first 4 fields must match struct btrfs_header */
444 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
445 __le64 bytenr; /* this block number */
448 /* allowed to be different from the btrfs_header from here own down */
455 /* this will help find the new super based on the log root */
456 __le64 log_root_transid;
459 __le64 root_dir_objectid;
465 __le32 sys_chunk_array_size;
466 __le64 chunk_root_generation;
468 __le64 compat_ro_flags;
469 __le64 incompat_flags;
474 struct btrfs_dev_item dev_item;
476 char label[BTRFS_LABEL_SIZE];
478 __le64 cache_generation;
480 /* future expansion */
482 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
483 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
484 } __attribute__ ((__packed__));
487 * Compat flags that we support. If any incompat flags are set other than the
488 * ones specified below then we will fail to mount
490 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
491 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
492 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
493 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
495 * some patches floated around with a second compression method
496 * lets save that incompat here for when they do get in
497 * Note we don't actually support it, we're just reserving the
500 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
503 * older kernels tried to do bigger metadata blocks, but the
504 * code was pretty buggy. Lets not let them try anymore.
506 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
508 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
509 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
511 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
512 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
513 #define BTRFS_FEATURE_INCOMPAT_SUPP \
514 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
515 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
516 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
517 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
518 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
519 BTRFS_FEATURE_INCOMPAT_RAID56 | \
520 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
523 * A leaf is full of items. offset and size tell us where to find
524 * the item in the leaf (relative to the start of the data area)
527 struct btrfs_disk_key key;
530 } __attribute__ ((__packed__));
533 * leaves have an item area and a data area:
534 * [item0, item1....itemN] [free space] [dataN...data1, data0]
536 * The data is separate from the items to get the keys closer together
540 struct btrfs_header header;
541 struct btrfs_item items[];
542 } __attribute__ ((__packed__));
545 * all non-leaf blocks are nodes, they hold only keys and pointers to
548 struct btrfs_key_ptr {
549 struct btrfs_disk_key key;
552 } __attribute__ ((__packed__));
555 struct btrfs_header header;
556 struct btrfs_key_ptr ptrs[];
557 } __attribute__ ((__packed__));
560 * btrfs_paths remember the path taken from the root down to the leaf.
561 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
562 * to any other levels that are present.
564 * The slots array records the index of the item or block pointer
565 * used while walking the tree.
568 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
569 int slots[BTRFS_MAX_LEVEL];
570 /* if there is real range locking, this locks field will change */
571 int locks[BTRFS_MAX_LEVEL];
573 /* keep some upper locks as we walk down */
577 * set by btrfs_split_item, tells search_slot to keep all locks
578 * and to force calls to keep space in the nodes
580 unsigned int search_for_split:1;
581 unsigned int keep_locks:1;
582 unsigned int skip_locking:1;
583 unsigned int leave_spinning:1;
584 unsigned int search_commit_root:1;
585 unsigned int really_keep_locks:1;
589 * items in the extent btree are used to record the objectid of the
590 * owner of the block and the number of references
593 struct btrfs_extent_item {
597 } __attribute__ ((__packed__));
599 struct btrfs_extent_item_v0 {
601 } __attribute__ ((__packed__));
603 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
604 sizeof(struct btrfs_item))
606 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
607 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
609 /* following flags only apply to tree blocks */
611 /* use full backrefs for extent pointers in the block */
612 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
615 * this flag is only used internally by scrub and may be changed at any time
616 * it is only declared here to avoid collisions
618 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
620 struct btrfs_tree_block_info {
621 struct btrfs_disk_key key;
623 } __attribute__ ((__packed__));
625 struct btrfs_extent_data_ref {
630 } __attribute__ ((__packed__));
632 struct btrfs_shared_data_ref {
634 } __attribute__ ((__packed__));
636 struct btrfs_extent_inline_ref {
639 } __attribute__ ((__packed__));
641 /* old style backrefs item */
642 struct btrfs_extent_ref_v0 {
647 } __attribute__ ((__packed__));
650 /* dev extents record free space on individual devices. The owner
651 * field points back to the chunk allocation mapping tree that allocated
652 * the extent. The chunk tree uuid field is a way to double check the owner
654 struct btrfs_dev_extent {
656 __le64 chunk_objectid;
659 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
660 } __attribute__ ((__packed__));
662 struct btrfs_inode_ref {
666 } __attribute__ ((__packed__));
668 struct btrfs_inode_extref {
669 __le64 parent_objectid;
674 } __attribute__ ((__packed__));
676 struct btrfs_timespec {
679 } __attribute__ ((__packed__));
681 enum btrfs_compression_type {
682 BTRFS_COMPRESS_NONE = 0,
683 BTRFS_COMPRESS_ZLIB = 1,
684 BTRFS_COMPRESS_LZO = 2,
685 BTRFS_COMPRESS_TYPES = 2,
686 BTRFS_COMPRESS_LAST = 3,
689 struct btrfs_inode_item {
690 /* nfs style generation number */
692 /* transid that last touched this inode */
704 /* modification sequence number for NFS */
708 * a little future expansion, for more than this we can
709 * just grow the inode item and version it
712 struct btrfs_timespec atime;
713 struct btrfs_timespec ctime;
714 struct btrfs_timespec mtime;
715 struct btrfs_timespec otime;
716 } __attribute__ ((__packed__));
718 struct btrfs_dir_log_item {
720 } __attribute__ ((__packed__));
722 struct btrfs_dir_item {
723 struct btrfs_disk_key location;
728 } __attribute__ ((__packed__));
730 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
732 struct btrfs_root_item {
733 struct btrfs_inode_item inode;
739 __le64 last_snapshot;
742 struct btrfs_disk_key drop_progress;
747 * The following fields appear after subvol_uuids+subvol_times
752 * This generation number is used to test if the new fields are valid
753 * and up to date while reading the root item. Everytime the root item
754 * is written out, the "generation" field is copied into this field. If
755 * anyone ever mounted the fs with an older kernel, we will have
756 * mismatching generation values here and thus must invalidate the
757 * new fields. See btrfs_update_root and btrfs_find_last_root for
759 * the offset of generation_v2 is also used as the start for the memset
760 * when invalidating the fields.
762 __le64 generation_v2;
763 u8 uuid[BTRFS_UUID_SIZE];
764 u8 parent_uuid[BTRFS_UUID_SIZE];
765 u8 received_uuid[BTRFS_UUID_SIZE];
766 __le64 ctransid; /* updated when an inode changes */
767 __le64 otransid; /* trans when created */
768 __le64 stransid; /* trans when sent. non-zero for received subvol */
769 __le64 rtransid; /* trans when received. non-zero for received subvol */
770 struct btrfs_timespec ctime;
771 struct btrfs_timespec otime;
772 struct btrfs_timespec stime;
773 struct btrfs_timespec rtime;
774 __le64 reserved[8]; /* for future */
775 } __attribute__ ((__packed__));
778 * this is used for both forward and backward root refs
780 struct btrfs_root_ref {
784 } __attribute__ ((__packed__));
786 struct btrfs_disk_balance_args {
788 * profiles to operate on, single is denoted by
789 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
799 /* devid subset filter [pstart..pend) */
803 /* btrfs virtual address space subset filter [vstart..vend) */
808 * profile to convert to, single is denoted by
809 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
813 /* BTRFS_BALANCE_ARGS_* */
817 } __attribute__ ((__packed__));
820 * store balance parameters to disk so that balance can be properly
821 * resumed after crash or unmount
823 struct btrfs_balance_item {
824 /* BTRFS_BALANCE_* */
827 struct btrfs_disk_balance_args data;
828 struct btrfs_disk_balance_args meta;
829 struct btrfs_disk_balance_args sys;
832 } __attribute__ ((__packed__));
834 #define BTRFS_FILE_EXTENT_INLINE 0
835 #define BTRFS_FILE_EXTENT_REG 1
836 #define BTRFS_FILE_EXTENT_PREALLOC 2
838 struct btrfs_file_extent_item {
840 * transaction id that created this extent
844 * max number of bytes to hold this extent in ram
845 * when we split a compressed extent we can't know how big
846 * each of the resulting pieces will be. So, this is
847 * an upper limit on the size of the extent in ram instead of
853 * 32 bits for the various ways we might encode the data,
854 * including compression and encryption. If any of these
855 * are set to something a given disk format doesn't understand
856 * it is treated like an incompat flag for reading and writing,
861 __le16 other_encoding; /* spare for later use */
863 /* are we inline data or a real extent? */
867 * disk space consumed by the extent, checksum blocks are included
871 __le64 disk_num_bytes;
873 * the logical offset in file blocks (no csums)
874 * this extent record is for. This allows a file extent to point
875 * into the middle of an existing extent on disk, sharing it
876 * between two snapshots (useful if some bytes in the middle of the
877 * extent have changed
881 * the logical number of file blocks (no csums included). This
882 * always reflects the size uncompressed and without encoding.
886 } __attribute__ ((__packed__));
888 struct btrfs_csum_item {
890 } __attribute__ ((__packed__));
892 struct btrfs_dev_stats_item {
894 * grow this item struct at the end for future enhancements and keep
895 * the existing values unchanged
897 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
898 } __attribute__ ((__packed__));
900 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
901 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
902 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
903 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
904 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
905 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
906 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
908 struct btrfs_dev_replace {
909 u64 replace_state; /* see #define above */
910 u64 time_started; /* seconds since 1-Jan-1970 */
911 u64 time_stopped; /* seconds since 1-Jan-1970 */
912 atomic64_t num_write_errors;
913 atomic64_t num_uncorrectable_read_errors;
916 u64 committed_cursor_left;
917 u64 cursor_left_last_write_of_item;
920 u64 cont_reading_from_srcdev_mode; /* see #define above */
923 int item_needs_writeback;
924 struct btrfs_device *srcdev;
925 struct btrfs_device *tgtdev;
928 atomic_t nesting_level;
929 struct mutex lock_finishing_cancel_unmount;
930 struct mutex lock_management_lock;
933 struct btrfs_scrub_progress scrub_progress;
936 struct btrfs_dev_replace_item {
938 * grow this item struct at the end for future enhancements and keep
939 * the existing values unchanged
944 __le64 cont_reading_from_srcdev_mode;
946 __le64 replace_state;
949 __le64 num_write_errors;
950 __le64 num_uncorrectable_read_errors;
951 } __attribute__ ((__packed__));
953 /* different types of block groups (and chunks) */
954 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
955 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
956 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
957 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
958 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
959 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
960 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
961 #define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
962 #define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
963 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
965 enum btrfs_raid_types {
976 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
977 BTRFS_BLOCK_GROUP_SYSTEM | \
978 BTRFS_BLOCK_GROUP_METADATA)
980 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
981 BTRFS_BLOCK_GROUP_RAID1 | \
982 BTRFS_BLOCK_GROUP_RAID5 | \
983 BTRFS_BLOCK_GROUP_RAID6 | \
984 BTRFS_BLOCK_GROUP_DUP | \
985 BTRFS_BLOCK_GROUP_RAID10)
987 * We need a bit for restriper to be able to tell when chunks of type
988 * SINGLE are available. This "extended" profile format is used in
989 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
990 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
991 * to avoid remappings between two formats in future.
993 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
995 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
996 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
998 static inline u64 chunk_to_extended(u64 flags)
1000 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1001 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1005 static inline u64 extended_to_chunk(u64 flags)
1007 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1010 struct btrfs_block_group_item {
1012 __le64 chunk_objectid;
1014 } __attribute__ ((__packed__));
1017 * is subvolume quota turned on?
1019 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1021 * SCANNING is set during the initialization phase
1023 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1025 * Some qgroup entries are known to be out of date,
1026 * either because the configuration has changed in a way that
1027 * makes a rescan necessary, or because the fs has been mounted
1028 * with a non-qgroup-aware version.
1029 * Turning qouta off and on again makes it inconsistent, too.
1031 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1033 #define BTRFS_QGROUP_STATUS_VERSION 1
1035 struct btrfs_qgroup_status_item {
1038 * the generation is updated during every commit. As older
1039 * versions of btrfs are not aware of qgroups, it will be
1040 * possible to detect inconsistencies by checking the
1041 * generation on mount time
1045 /* flag definitions see above */
1049 * only used during scanning to record the progress
1050 * of the scan. It contains a logical address
1053 } __attribute__ ((__packed__));
1055 struct btrfs_qgroup_info_item {
1061 } __attribute__ ((__packed__));
1063 /* flags definition for qgroup limits */
1064 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1065 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1066 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1067 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1068 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1069 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1071 struct btrfs_qgroup_limit_item {
1073 * only updated when any of the other values change
1080 } __attribute__ ((__packed__));
1082 struct btrfs_space_info {
1085 u64 total_bytes; /* total bytes in the space,
1086 this doesn't take mirrors into account */
1087 u64 bytes_used; /* total bytes used,
1088 this doesn't take mirrors into account */
1089 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1090 transaction finishes */
1091 u64 bytes_reserved; /* total bytes the allocator has reserved for
1092 current allocations */
1093 u64 bytes_readonly; /* total bytes that are read only */
1095 u64 bytes_may_use; /* number of bytes that may be used for
1096 delalloc/allocations */
1097 u64 disk_used; /* total bytes used on disk */
1098 u64 disk_total; /* total bytes on disk, takes mirrors into
1102 * we bump reservation progress every time we decrement
1103 * bytes_reserved. This way people waiting for reservations
1104 * know something good has happened and they can check
1105 * for progress. The number here isn't to be trusted, it
1106 * just shows reclaim activity
1108 unsigned long reservation_progress;
1110 unsigned int full:1; /* indicates that we cannot allocate any more
1111 chunks for this space */
1112 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1114 unsigned int flush:1; /* set if we are trying to make space */
1116 unsigned int force_alloc; /* set if we need to force a chunk
1117 alloc for this space */
1119 struct list_head list;
1121 /* for block groups in our same type */
1122 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1124 struct rw_semaphore groups_sem;
1125 wait_queue_head_t wait;
1128 #define BTRFS_BLOCK_RSV_GLOBAL 1
1129 #define BTRFS_BLOCK_RSV_DELALLOC 2
1130 #define BTRFS_BLOCK_RSV_TRANS 3
1131 #define BTRFS_BLOCK_RSV_CHUNK 4
1132 #define BTRFS_BLOCK_RSV_DELOPS 5
1133 #define BTRFS_BLOCK_RSV_EMPTY 6
1134 #define BTRFS_BLOCK_RSV_TEMP 7
1136 struct btrfs_block_rsv {
1139 struct btrfs_space_info *space_info;
1141 unsigned short full;
1142 unsigned short type;
1143 unsigned short failfast;
1147 * free clusters are used to claim free space in relatively large chunks,
1148 * allowing us to do less seeky writes. They are used for all metadata
1149 * allocations and data allocations in ssd mode.
1151 struct btrfs_free_cluster {
1153 spinlock_t refill_lock;
1154 struct rb_root root;
1156 /* largest extent in this cluster */
1159 /* first extent starting offset */
1162 struct btrfs_block_group_cache *block_group;
1164 * when a cluster is allocated from a block group, we put the
1165 * cluster onto a list in the block group so that it can
1166 * be freed before the block group is freed.
1168 struct list_head block_group_list;
1171 enum btrfs_caching_type {
1173 BTRFS_CACHE_STARTED = 1,
1174 BTRFS_CACHE_FAST = 2,
1175 BTRFS_CACHE_FINISHED = 3,
1178 enum btrfs_disk_cache_state {
1179 BTRFS_DC_WRITTEN = 0,
1183 BTRFS_DC_NEED_WRITE = 4,
1186 struct btrfs_caching_control {
1187 struct list_head list;
1189 wait_queue_head_t wait;
1190 struct btrfs_work work;
1191 struct btrfs_block_group_cache *block_group;
1196 struct btrfs_block_group_cache {
1197 struct btrfs_key key;
1198 struct btrfs_block_group_item item;
1199 struct btrfs_fs_info *fs_info;
1200 struct inode *inode;
1207 u64 cache_generation;
1209 /* for raid56, this is a full stripe, without parity */
1210 unsigned long full_stripe_len;
1213 unsigned int dirty:1;
1214 unsigned int iref:1;
1216 int disk_cache_state;
1218 /* cache tracking stuff */
1220 struct btrfs_caching_control *caching_ctl;
1221 u64 last_byte_to_unpin;
1223 struct btrfs_space_info *space_info;
1225 /* free space cache stuff */
1226 struct btrfs_free_space_ctl *free_space_ctl;
1228 /* block group cache stuff */
1229 struct rb_node cache_node;
1231 /* for block groups in the same raid type */
1232 struct list_head list;
1237 /* List of struct btrfs_free_clusters for this block group.
1238 * Today it will only have one thing on it, but that may change
1240 struct list_head cluster_list;
1242 /* For delayed block group creation */
1243 struct list_head new_bg_list;
1246 /* delayed seq elem */
1248 struct list_head list;
1252 enum btrfs_orphan_cleanup_state {
1253 ORPHAN_CLEANUP_STARTED = 1,
1254 ORPHAN_CLEANUP_DONE = 2,
1257 /* used by the raid56 code to lock stripes for read/modify/write */
1258 struct btrfs_stripe_hash {
1259 struct list_head hash_list;
1260 wait_queue_head_t wait;
1264 /* used by the raid56 code to lock stripes for read/modify/write */
1265 struct btrfs_stripe_hash_table {
1266 struct list_head stripe_cache;
1267 spinlock_t cache_lock;
1269 struct btrfs_stripe_hash table[];
1272 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1275 struct reloc_control;
1276 struct btrfs_device;
1277 struct btrfs_fs_devices;
1278 struct btrfs_balance_control;
1279 struct btrfs_delayed_root;
1280 struct btrfs_fs_info {
1281 u8 fsid[BTRFS_FSID_SIZE];
1282 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1283 struct btrfs_root *extent_root;
1284 struct btrfs_root *tree_root;
1285 struct btrfs_root *chunk_root;
1286 struct btrfs_root *dev_root;
1287 struct btrfs_root *fs_root;
1288 struct btrfs_root *csum_root;
1289 struct btrfs_root *quota_root;
1291 /* the log root tree is a directory of all the other log roots */
1292 struct btrfs_root *log_root_tree;
1294 spinlock_t fs_roots_radix_lock;
1295 struct radix_tree_root fs_roots_radix;
1297 /* block group cache stuff */
1298 spinlock_t block_group_cache_lock;
1299 u64 first_logical_byte;
1300 struct rb_root block_group_cache_tree;
1302 /* keep track of unallocated space */
1303 spinlock_t free_chunk_lock;
1304 u64 free_chunk_space;
1306 struct extent_io_tree freed_extents[2];
1307 struct extent_io_tree *pinned_extents;
1309 /* logical->physical extent mapping */
1310 struct btrfs_mapping_tree mapping_tree;
1313 * block reservation for extent, checksum, root tree and
1314 * delayed dir index item
1316 struct btrfs_block_rsv global_block_rsv;
1317 /* block reservation for delay allocation */
1318 struct btrfs_block_rsv delalloc_block_rsv;
1319 /* block reservation for metadata operations */
1320 struct btrfs_block_rsv trans_block_rsv;
1321 /* block reservation for chunk tree */
1322 struct btrfs_block_rsv chunk_block_rsv;
1323 /* block reservation for delayed operations */
1324 struct btrfs_block_rsv delayed_block_rsv;
1326 struct btrfs_block_rsv empty_block_rsv;
1329 u64 last_trans_committed;
1332 * this is updated to the current trans every time a full commit
1333 * is required instead of the faster short fsync log commits
1335 u64 last_trans_log_full_commit;
1336 unsigned long mount_opt;
1337 unsigned long compress_type:4;
1339 * It is a suggestive number, the read side is safe even it gets a
1340 * wrong number because we will write out the data into a regular
1341 * extent. The write side(mount/remount) is under ->s_umount lock,
1342 * so it is also safe.
1346 * Protected by ->chunk_mutex and sb->s_umount.
1348 * The reason that we use two lock to protect it is because only
1349 * remount and mount operations can change it and these two operations
1350 * are under sb->s_umount, but the read side (chunk allocation) can not
1351 * acquire sb->s_umount or the deadlock would happen. So we use two
1352 * locks to protect it. On the write side, we must acquire two locks,
1353 * and on the read side, we just need acquire one of them.
1356 struct btrfs_transaction *running_transaction;
1357 wait_queue_head_t transaction_throttle;
1358 wait_queue_head_t transaction_wait;
1359 wait_queue_head_t transaction_blocked_wait;
1360 wait_queue_head_t async_submit_wait;
1362 struct btrfs_super_block *super_copy;
1363 struct btrfs_super_block *super_for_commit;
1364 struct block_device *__bdev;
1365 struct super_block *sb;
1366 struct inode *btree_inode;
1367 struct backing_dev_info bdi;
1368 struct mutex tree_log_mutex;
1369 struct mutex transaction_kthread_mutex;
1370 struct mutex cleaner_mutex;
1371 struct mutex chunk_mutex;
1372 struct mutex volume_mutex;
1374 /* this is used during read/modify/write to make sure
1375 * no two ios are trying to mod the same stripe at the same
1378 struct btrfs_stripe_hash_table *stripe_hash_table;
1381 * this protects the ordered operations list only while we are
1382 * processing all of the entries on it. This way we make
1383 * sure the commit code doesn't find the list temporarily empty
1384 * because another function happens to be doing non-waiting preflush
1385 * before jumping into the main commit.
1387 struct mutex ordered_operations_mutex;
1388 struct rw_semaphore extent_commit_sem;
1390 struct rw_semaphore cleanup_work_sem;
1392 struct rw_semaphore subvol_sem;
1393 struct srcu_struct subvol_srcu;
1395 spinlock_t trans_lock;
1397 * the reloc mutex goes with the trans lock, it is taken
1398 * during commit to protect us from the relocation code
1400 struct mutex reloc_mutex;
1402 struct list_head trans_list;
1403 struct list_head dead_roots;
1404 struct list_head caching_block_groups;
1406 spinlock_t delayed_iput_lock;
1407 struct list_head delayed_iputs;
1409 /* this protects tree_mod_seq_list */
1410 spinlock_t tree_mod_seq_lock;
1411 atomic_t tree_mod_seq;
1412 struct list_head tree_mod_seq_list;
1413 struct seq_list tree_mod_seq_elem;
1415 /* this protects tree_mod_log */
1416 rwlock_t tree_mod_log_lock;
1417 struct rb_root tree_mod_log;
1419 atomic_t nr_async_submits;
1420 atomic_t async_submit_draining;
1421 atomic_t nr_async_bios;
1422 atomic_t async_delalloc_pages;
1423 atomic_t open_ioctl_trans;
1426 * this is used by the balancing code to wait for all the pending
1429 spinlock_t ordered_extent_lock;
1432 * all of the data=ordered extents pending writeback
1433 * these can span multiple transactions and basically include
1434 * every dirty data page that isn't from nodatacow
1436 struct list_head ordered_extents;
1438 spinlock_t delalloc_lock;
1440 * all of the inodes that have delalloc bytes. It is possible for
1441 * this list to be empty even when there is still dirty data=ordered
1442 * extents waiting to finish IO.
1444 struct list_head delalloc_inodes;
1447 * there is a pool of worker threads for checksumming during writes
1448 * and a pool for checksumming after reads. This is because readers
1449 * can run with FS locks held, and the writers may be waiting for
1450 * those locks. We don't want ordering in the pending list to cause
1451 * deadlocks, and so the two are serviced separately.
1453 * A third pool does submit_bio to avoid deadlocking with the other
1456 struct btrfs_workers generic_worker;
1457 struct btrfs_workers workers;
1458 struct btrfs_workers delalloc_workers;
1459 struct btrfs_workers flush_workers;
1460 struct btrfs_workers endio_workers;
1461 struct btrfs_workers endio_meta_workers;
1462 struct btrfs_workers endio_raid56_workers;
1463 struct btrfs_workers rmw_workers;
1464 struct btrfs_workers endio_meta_write_workers;
1465 struct btrfs_workers endio_write_workers;
1466 struct btrfs_workers endio_freespace_worker;
1467 struct btrfs_workers submit_workers;
1468 struct btrfs_workers caching_workers;
1469 struct btrfs_workers readahead_workers;
1472 * fixup workers take dirty pages that didn't properly go through
1473 * the cow mechanism and make them safe to write. It happens
1474 * for the sys_munmap function call path
1476 struct btrfs_workers fixup_workers;
1477 struct btrfs_workers delayed_workers;
1478 struct task_struct *transaction_kthread;
1479 struct task_struct *cleaner_kthread;
1480 int thread_pool_size;
1482 struct kobject super_kobj;
1483 struct completion kobj_unregister;
1486 int log_root_recovering;
1492 /* used to keep from writing metadata until there is a nice batch */
1493 struct percpu_counter dirty_metadata_bytes;
1494 struct percpu_counter delalloc_bytes;
1495 s32 dirty_metadata_batch;
1498 struct list_head dirty_cowonly_roots;
1500 struct btrfs_fs_devices *fs_devices;
1503 * the space_info list is almost entirely read only. It only changes
1504 * when we add a new raid type to the FS, and that happens
1505 * very rarely. RCU is used to protect it.
1507 struct list_head space_info;
1509 struct btrfs_space_info *data_sinfo;
1511 struct reloc_control *reloc_ctl;
1513 /* data_alloc_cluster is only used in ssd mode */
1514 struct btrfs_free_cluster data_alloc_cluster;
1516 /* all metadata allocations go through this cluster */
1517 struct btrfs_free_cluster meta_alloc_cluster;
1519 /* auto defrag inodes go here */
1520 spinlock_t defrag_inodes_lock;
1521 struct rb_root defrag_inodes;
1522 atomic_t defrag_running;
1524 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1525 seqlock_t profiles_lock;
1527 * these three are in extended format (availability of single
1528 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1529 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1531 u64 avail_data_alloc_bits;
1532 u64 avail_metadata_alloc_bits;
1533 u64 avail_system_alloc_bits;
1535 /* restriper state */
1536 spinlock_t balance_lock;
1537 struct mutex balance_mutex;
1538 atomic_t balance_running;
1539 atomic_t balance_pause_req;
1540 atomic_t balance_cancel_req;
1541 struct btrfs_balance_control *balance_ctl;
1542 wait_queue_head_t balance_wait_q;
1544 unsigned data_chunk_allocations;
1545 unsigned metadata_ratio;
1549 /* private scrub information */
1550 struct mutex scrub_lock;
1551 atomic_t scrubs_running;
1552 atomic_t scrub_pause_req;
1553 atomic_t scrubs_paused;
1554 atomic_t scrub_cancel_req;
1555 wait_queue_head_t scrub_pause_wait;
1556 struct rw_semaphore scrub_super_lock;
1557 int scrub_workers_refcnt;
1558 struct btrfs_workers scrub_workers;
1559 struct btrfs_workers scrub_wr_completion_workers;
1560 struct btrfs_workers scrub_nocow_workers;
1562 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1563 u32 check_integrity_print_mask;
1568 unsigned int quota_enabled:1;
1571 * quota_enabled only changes state after a commit. This holds the
1574 unsigned int pending_quota_state:1;
1576 /* is qgroup tracking in a consistent state? */
1579 /* holds configuration and tracking. Protected by qgroup_lock */
1580 struct rb_root qgroup_tree;
1581 spinlock_t qgroup_lock;
1583 /* list of dirty qgroups to be written at next commit */
1584 struct list_head dirty_qgroups;
1586 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1589 /* filesystem state */
1590 unsigned long fs_state;
1592 struct btrfs_delayed_root *delayed_root;
1594 /* readahead tree */
1595 spinlock_t reada_lock;
1596 struct radix_tree_root reada_tree;
1598 /* next backup root to be overwritten */
1599 int backup_root_index;
1601 int num_tolerated_disk_barrier_failures;
1603 /* device replace state */
1604 struct btrfs_dev_replace dev_replace;
1606 atomic_t mutually_exclusive_operation_running;
1610 * in ram representation of the tree. extent_root is used for all allocations
1611 * and for the extent tree extent_root root.
1614 struct extent_buffer *node;
1616 struct extent_buffer *commit_root;
1617 struct btrfs_root *log_root;
1618 struct btrfs_root *reloc_root;
1620 struct btrfs_root_item root_item;
1621 struct btrfs_key root_key;
1622 struct btrfs_fs_info *fs_info;
1623 struct extent_io_tree dirty_log_pages;
1625 struct kobject root_kobj;
1626 struct completion kobj_unregister;
1627 struct mutex objectid_mutex;
1629 spinlock_t accounting_lock;
1630 struct btrfs_block_rsv *block_rsv;
1632 /* free ino cache stuff */
1633 struct mutex fs_commit_mutex;
1634 struct btrfs_free_space_ctl *free_ino_ctl;
1635 enum btrfs_caching_type cached;
1636 spinlock_t cache_lock;
1637 wait_queue_head_t cache_wait;
1638 struct btrfs_free_space_ctl *free_ino_pinned;
1640 struct inode *cache_inode;
1642 struct mutex log_mutex;
1643 wait_queue_head_t log_writer_wait;
1644 wait_queue_head_t log_commit_wait[2];
1645 atomic_t log_writers;
1646 atomic_t log_commit[2];
1648 unsigned long log_transid;
1649 unsigned long last_log_commit;
1650 pid_t log_start_pid;
1651 bool log_multiple_pids;
1656 /* data allocations are done in sectorsize units */
1659 /* node allocations are done in nodesize units */
1662 /* leaf allocations are done in leafsize units */
1669 u64 highest_objectid;
1671 /* btrfs_record_root_in_trans is a multi-step process,
1672 * and it can race with the balancing code. But the
1673 * race is very small, and only the first time the root
1674 * is added to each transaction. So in_trans_setup
1675 * is used to tell us when more checks are required
1677 unsigned long in_trans_setup;
1682 u64 defrag_trans_start;
1683 struct btrfs_key defrag_progress;
1684 struct btrfs_key defrag_max;
1688 /* the dirty list is only used by non-reference counted roots */
1689 struct list_head dirty_list;
1691 struct list_head root_list;
1693 spinlock_t log_extents_lock[2];
1694 struct list_head logged_list[2];
1696 spinlock_t orphan_lock;
1697 atomic_t orphan_inodes;
1698 struct btrfs_block_rsv *orphan_block_rsv;
1699 int orphan_item_inserted;
1700 int orphan_cleanup_state;
1702 spinlock_t inode_lock;
1703 /* red-black tree that keeps track of in-memory inodes */
1704 struct rb_root inode_tree;
1707 * radix tree that keeps track of delayed nodes of every inode,
1708 * protected by inode_lock
1710 struct radix_tree_root delayed_nodes_tree;
1712 * right now this just gets used so that a root has its own devid
1713 * for stat. It may be used for more later
1719 spinlock_t root_item_lock;
1722 struct btrfs_ioctl_defrag_range_args {
1723 /* start of the defrag operation */
1726 /* number of bytes to defrag, use (u64)-1 to say all */
1730 * flags for the operation, which can include turning
1731 * on compression for this one defrag
1736 * any extent bigger than this will be considered
1737 * already defragged. Use 0 to take the kernel default
1738 * Use 1 to say every single extent must be rewritten
1740 __u32 extent_thresh;
1743 * which compression method to use if turning on compression
1744 * for this defrag operation. If unspecified, zlib will
1747 __u32 compress_type;
1749 /* spare for later */
1755 * inode items have the data typically returned from stat and store other
1756 * info about object characteristics. There is one for every file and dir in
1759 #define BTRFS_INODE_ITEM_KEY 1
1760 #define BTRFS_INODE_REF_KEY 12
1761 #define BTRFS_INODE_EXTREF_KEY 13
1762 #define BTRFS_XATTR_ITEM_KEY 24
1763 #define BTRFS_ORPHAN_ITEM_KEY 48
1764 /* reserve 2-15 close to the inode for later flexibility */
1767 * dir items are the name -> inode pointers in a directory. There is one
1768 * for every name in a directory.
1770 #define BTRFS_DIR_LOG_ITEM_KEY 60
1771 #define BTRFS_DIR_LOG_INDEX_KEY 72
1772 #define BTRFS_DIR_ITEM_KEY 84
1773 #define BTRFS_DIR_INDEX_KEY 96
1775 * extent data is for file data
1777 #define BTRFS_EXTENT_DATA_KEY 108
1780 * extent csums are stored in a separate tree and hold csums for
1781 * an entire extent on disk.
1783 #define BTRFS_EXTENT_CSUM_KEY 128
1786 * root items point to tree roots. They are typically in the root
1787 * tree used by the super block to find all the other trees
1789 #define BTRFS_ROOT_ITEM_KEY 132
1792 * root backrefs tie subvols and snapshots to the directory entries that
1795 #define BTRFS_ROOT_BACKREF_KEY 144
1798 * root refs make a fast index for listing all of the snapshots and
1799 * subvolumes referenced by a given root. They point directly to the
1800 * directory item in the root that references the subvol
1802 #define BTRFS_ROOT_REF_KEY 156
1805 * extent items are in the extent map tree. These record which blocks
1806 * are used, and how many references there are to each block
1808 #define BTRFS_EXTENT_ITEM_KEY 168
1810 #define BTRFS_TREE_BLOCK_REF_KEY 176
1812 #define BTRFS_EXTENT_DATA_REF_KEY 178
1814 #define BTRFS_EXTENT_REF_V0_KEY 180
1816 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1818 #define BTRFS_SHARED_DATA_REF_KEY 184
1821 * block groups give us hints into the extent allocation trees. Which
1822 * blocks are free etc etc
1824 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1826 #define BTRFS_DEV_EXTENT_KEY 204
1827 #define BTRFS_DEV_ITEM_KEY 216
1828 #define BTRFS_CHUNK_ITEM_KEY 228
1831 * Records the overall state of the qgroups.
1832 * There's only one instance of this key present,
1833 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1835 #define BTRFS_QGROUP_STATUS_KEY 240
1837 * Records the currently used space of the qgroup.
1838 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1840 #define BTRFS_QGROUP_INFO_KEY 242
1842 * Contains the user configured limits for the qgroup.
1843 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1845 #define BTRFS_QGROUP_LIMIT_KEY 244
1847 * Records the child-parent relationship of qgroups. For
1848 * each relation, 2 keys are present:
1849 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1850 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1852 #define BTRFS_QGROUP_RELATION_KEY 246
1854 #define BTRFS_BALANCE_ITEM_KEY 248
1857 * Persistantly stores the io stats in the device tree.
1858 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1860 #define BTRFS_DEV_STATS_KEY 249
1863 * Persistantly stores the device replace state in the device tree.
1864 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1866 #define BTRFS_DEV_REPLACE_KEY 250
1869 * string items are for debugging. They just store a short string of
1872 #define BTRFS_STRING_ITEM_KEY 253
1875 * Flags for mount options.
1877 * Note: don't forget to add new options to btrfs_show_options()
1879 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1880 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1881 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1882 #define BTRFS_MOUNT_SSD (1 << 3)
1883 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1884 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1885 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1886 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1887 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1888 #define BTRFS_MOUNT_NOSSD (1 << 9)
1889 #define BTRFS_MOUNT_DISCARD (1 << 10)
1890 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1891 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1892 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1893 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1894 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1895 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1896 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1897 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1898 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1899 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1900 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1901 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1903 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1904 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1905 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1910 #define BTRFS_INODE_NODATASUM (1 << 0)
1911 #define BTRFS_INODE_NODATACOW (1 << 1)
1912 #define BTRFS_INODE_READONLY (1 << 2)
1913 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1914 #define BTRFS_INODE_PREALLOC (1 << 4)
1915 #define BTRFS_INODE_SYNC (1 << 5)
1916 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1917 #define BTRFS_INODE_APPEND (1 << 7)
1918 #define BTRFS_INODE_NODUMP (1 << 8)
1919 #define BTRFS_INODE_NOATIME (1 << 9)
1920 #define BTRFS_INODE_DIRSYNC (1 << 10)
1921 #define BTRFS_INODE_COMPRESS (1 << 11)
1923 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1925 struct btrfs_map_token {
1926 struct extent_buffer *eb;
1928 unsigned long offset;
1931 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1933 token->kaddr = NULL;
1936 /* some macros to generate set/get funcs for the struct fields. This
1937 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1940 #define le8_to_cpu(v) (v)
1941 #define cpu_to_le8(v) (v)
1944 #define read_eb_member(eb, ptr, type, member, result) ( \
1945 read_extent_buffer(eb, (char *)(result), \
1946 ((unsigned long)(ptr)) + \
1947 offsetof(type, member), \
1948 sizeof(((type *)0)->member)))
1950 #define write_eb_member(eb, ptr, type, member, result) ( \
1951 write_extent_buffer(eb, (char *)(result), \
1952 ((unsigned long)(ptr)) + \
1953 offsetof(type, member), \
1954 sizeof(((type *)0)->member)))
1956 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1957 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1958 unsigned long off, \
1959 struct btrfs_map_token *token); \
1960 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1961 unsigned long off, u##bits val, \
1962 struct btrfs_map_token *token); \
1963 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1964 unsigned long off) \
1966 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1968 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1969 unsigned long off, u##bits val) \
1971 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1974 DECLARE_BTRFS_SETGET_BITS(8)
1975 DECLARE_BTRFS_SETGET_BITS(16)
1976 DECLARE_BTRFS_SETGET_BITS(32)
1977 DECLARE_BTRFS_SETGET_BITS(64)
1979 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1980 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1982 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1983 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1985 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1988 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1989 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1991 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1992 struct btrfs_map_token *token) \
1994 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1995 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1997 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1998 type *s, u##bits val, \
1999 struct btrfs_map_token *token) \
2001 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2002 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2005 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2006 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2008 type *p = page_address(eb->pages[0]); \
2009 u##bits res = le##bits##_to_cpu(p->member); \
2012 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2015 type *p = page_address(eb->pages[0]); \
2016 p->member = cpu_to_le##bits(val); \
2019 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2020 static inline u##bits btrfs_##name(type *s) \
2022 return le##bits##_to_cpu(s->member); \
2024 static inline void btrfs_set_##name(type *s, u##bits val) \
2026 s->member = cpu_to_le##bits(val); \
2029 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2030 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2031 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2032 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2033 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2034 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2036 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2037 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2038 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2039 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2040 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2041 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2043 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2044 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2046 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2048 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2050 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2052 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2054 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2055 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2057 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2059 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2061 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2064 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
2066 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
2069 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
2071 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
2074 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2075 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2076 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2077 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2078 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2079 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2080 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2081 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2082 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2083 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2084 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2086 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2088 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2091 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2093 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2095 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2097 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2099 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2101 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2106 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2107 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2109 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2112 unsigned long offset = (unsigned long)c;
2113 offset += offsetof(struct btrfs_chunk, stripe);
2114 offset += nr * sizeof(struct btrfs_stripe);
2115 return (struct btrfs_stripe *)offset;
2118 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2120 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2123 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2124 struct btrfs_chunk *c, int nr)
2126 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2129 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2130 struct btrfs_chunk *c, int nr)
2132 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2135 /* struct btrfs_block_group_item */
2136 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2138 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2140 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2141 struct btrfs_block_group_item, chunk_objectid, 64);
2143 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2144 struct btrfs_block_group_item, chunk_objectid, 64);
2145 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2146 struct btrfs_block_group_item, flags, 64);
2147 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2148 struct btrfs_block_group_item, flags, 64);
2150 /* struct btrfs_inode_ref */
2151 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2152 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2154 /* struct btrfs_inode_extref */
2155 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2156 parent_objectid, 64);
2157 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2159 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2161 /* struct btrfs_inode_item */
2162 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2163 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2164 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2165 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2166 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2167 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2168 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2169 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2170 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2171 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2172 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2173 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2175 static inline struct btrfs_timespec *
2176 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2178 unsigned long ptr = (unsigned long)inode_item;
2179 ptr += offsetof(struct btrfs_inode_item, atime);
2180 return (struct btrfs_timespec *)ptr;
2183 static inline struct btrfs_timespec *
2184 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2186 unsigned long ptr = (unsigned long)inode_item;
2187 ptr += offsetof(struct btrfs_inode_item, mtime);
2188 return (struct btrfs_timespec *)ptr;
2191 static inline struct btrfs_timespec *
2192 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2194 unsigned long ptr = (unsigned long)inode_item;
2195 ptr += offsetof(struct btrfs_inode_item, ctime);
2196 return (struct btrfs_timespec *)ptr;
2199 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2200 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2202 /* struct btrfs_dev_extent */
2203 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2205 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2206 chunk_objectid, 64);
2207 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2209 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2211 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2213 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2214 return (u8 *)((unsigned long)dev + ptr);
2217 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2218 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2220 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2222 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2225 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2227 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2228 struct btrfs_tree_block_info *item,
2229 struct btrfs_disk_key *key)
2231 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2234 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2235 struct btrfs_tree_block_info *item,
2236 struct btrfs_disk_key *key)
2238 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2241 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2243 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2245 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2247 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2250 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2253 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2255 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2258 static inline u32 btrfs_extent_inline_ref_size(int type)
2260 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2261 type == BTRFS_SHARED_BLOCK_REF_KEY)
2262 return sizeof(struct btrfs_extent_inline_ref);
2263 if (type == BTRFS_SHARED_DATA_REF_KEY)
2264 return sizeof(struct btrfs_shared_data_ref) +
2265 sizeof(struct btrfs_extent_inline_ref);
2266 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2267 return sizeof(struct btrfs_extent_data_ref) +
2268 offsetof(struct btrfs_extent_inline_ref, offset);
2273 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2274 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2276 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2277 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2279 /* struct btrfs_node */
2280 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2281 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2283 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2286 ptr = offsetof(struct btrfs_node, ptrs) +
2287 sizeof(struct btrfs_key_ptr) * nr;
2288 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2291 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2295 ptr = offsetof(struct btrfs_node, ptrs) +
2296 sizeof(struct btrfs_key_ptr) * nr;
2297 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2300 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2303 ptr = offsetof(struct btrfs_node, ptrs) +
2304 sizeof(struct btrfs_key_ptr) * nr;
2305 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2308 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2312 ptr = offsetof(struct btrfs_node, ptrs) +
2313 sizeof(struct btrfs_key_ptr) * nr;
2314 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2317 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2319 return offsetof(struct btrfs_node, ptrs) +
2320 sizeof(struct btrfs_key_ptr) * nr;
2323 void btrfs_node_key(struct extent_buffer *eb,
2324 struct btrfs_disk_key *disk_key, int nr);
2326 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2327 struct btrfs_disk_key *disk_key, int nr)
2330 ptr = btrfs_node_key_ptr_offset(nr);
2331 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2332 struct btrfs_key_ptr, key, disk_key);
2335 /* struct btrfs_item */
2336 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2337 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2339 static inline unsigned long btrfs_item_nr_offset(int nr)
2341 return offsetof(struct btrfs_leaf, items) +
2342 sizeof(struct btrfs_item) * nr;
2345 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2348 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2351 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2352 struct btrfs_item *item)
2354 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2357 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2359 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2362 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2364 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2367 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2369 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2372 static inline void btrfs_item_key(struct extent_buffer *eb,
2373 struct btrfs_disk_key *disk_key, int nr)
2375 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2376 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2379 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2380 struct btrfs_disk_key *disk_key, int nr)
2382 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2383 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2386 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2389 * struct btrfs_root_ref
2391 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2392 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2393 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2395 /* struct btrfs_dir_item */
2396 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2397 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2398 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2399 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2401 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2402 struct btrfs_dir_item *item,
2403 struct btrfs_disk_key *key)
2405 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2408 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2409 struct btrfs_dir_item *item,
2410 struct btrfs_disk_key *key)
2412 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2415 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2417 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2419 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2422 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2423 struct btrfs_free_space_header *h,
2424 struct btrfs_disk_key *key)
2426 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2429 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2430 struct btrfs_free_space_header *h,
2431 struct btrfs_disk_key *key)
2433 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2436 /* struct btrfs_disk_key */
2437 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2439 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2440 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2442 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2443 struct btrfs_disk_key *disk)
2445 cpu->offset = le64_to_cpu(disk->offset);
2446 cpu->type = disk->type;
2447 cpu->objectid = le64_to_cpu(disk->objectid);
2450 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2451 struct btrfs_key *cpu)
2453 disk->offset = cpu_to_le64(cpu->offset);
2454 disk->type = cpu->type;
2455 disk->objectid = cpu_to_le64(cpu->objectid);
2458 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2459 struct btrfs_key *key, int nr)
2461 struct btrfs_disk_key disk_key;
2462 btrfs_node_key(eb, &disk_key, nr);
2463 btrfs_disk_key_to_cpu(key, &disk_key);
2466 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2467 struct btrfs_key *key, int nr)
2469 struct btrfs_disk_key disk_key;
2470 btrfs_item_key(eb, &disk_key, nr);
2471 btrfs_disk_key_to_cpu(key, &disk_key);
2474 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2475 struct btrfs_dir_item *item,
2476 struct btrfs_key *key)
2478 struct btrfs_disk_key disk_key;
2479 btrfs_dir_item_key(eb, item, &disk_key);
2480 btrfs_disk_key_to_cpu(key, &disk_key);
2484 static inline u8 btrfs_key_type(struct btrfs_key *key)
2489 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2494 /* struct btrfs_header */
2495 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2496 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2498 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2499 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2500 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2501 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2503 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2505 return (btrfs_header_flags(eb) & flag) == flag;
2508 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2510 u64 flags = btrfs_header_flags(eb);
2511 btrfs_set_header_flags(eb, flags | flag);
2512 return (flags & flag) == flag;
2515 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2517 u64 flags = btrfs_header_flags(eb);
2518 btrfs_set_header_flags(eb, flags & ~flag);
2519 return (flags & flag) == flag;
2522 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2524 u64 flags = btrfs_header_flags(eb);
2525 return flags >> BTRFS_BACKREF_REV_SHIFT;
2528 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2531 u64 flags = btrfs_header_flags(eb);
2532 flags &= ~BTRFS_BACKREF_REV_MASK;
2533 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2534 btrfs_set_header_flags(eb, flags);
2537 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2539 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2543 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2545 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2549 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2551 return btrfs_header_level(eb) == 0;
2554 /* struct btrfs_root_item */
2555 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2557 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2558 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2559 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2561 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2563 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2564 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2565 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2566 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2567 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2568 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2569 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2570 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2572 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2574 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2576 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2578 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2580 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2583 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2585 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2588 /* struct btrfs_root_backup */
2589 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2591 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2593 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2594 tree_root_level, 8);
2596 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2598 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2599 chunk_root_gen, 64);
2600 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2601 chunk_root_level, 8);
2603 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2605 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2606 extent_root_gen, 64);
2607 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2608 extent_root_level, 8);
2610 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2612 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2614 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2617 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2619 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2621 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2624 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2626 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2628 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2629 csum_root_level, 8);
2630 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2632 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2634 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2637 /* struct btrfs_balance_item */
2638 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2640 static inline void btrfs_balance_data(struct extent_buffer *eb,
2641 struct btrfs_balance_item *bi,
2642 struct btrfs_disk_balance_args *ba)
2644 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2647 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2648 struct btrfs_balance_item *bi,
2649 struct btrfs_disk_balance_args *ba)
2651 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2654 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2655 struct btrfs_balance_item *bi,
2656 struct btrfs_disk_balance_args *ba)
2658 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2661 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2662 struct btrfs_balance_item *bi,
2663 struct btrfs_disk_balance_args *ba)
2665 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2668 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2669 struct btrfs_balance_item *bi,
2670 struct btrfs_disk_balance_args *ba)
2672 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2675 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2676 struct btrfs_balance_item *bi,
2677 struct btrfs_disk_balance_args *ba)
2679 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2683 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2684 struct btrfs_disk_balance_args *disk)
2686 memset(cpu, 0, sizeof(*cpu));
2688 cpu->profiles = le64_to_cpu(disk->profiles);
2689 cpu->usage = le64_to_cpu(disk->usage);
2690 cpu->devid = le64_to_cpu(disk->devid);
2691 cpu->pstart = le64_to_cpu(disk->pstart);
2692 cpu->pend = le64_to_cpu(disk->pend);
2693 cpu->vstart = le64_to_cpu(disk->vstart);
2694 cpu->vend = le64_to_cpu(disk->vend);
2695 cpu->target = le64_to_cpu(disk->target);
2696 cpu->flags = le64_to_cpu(disk->flags);
2700 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2701 struct btrfs_balance_args *cpu)
2703 memset(disk, 0, sizeof(*disk));
2705 disk->profiles = cpu_to_le64(cpu->profiles);
2706 disk->usage = cpu_to_le64(cpu->usage);
2707 disk->devid = cpu_to_le64(cpu->devid);
2708 disk->pstart = cpu_to_le64(cpu->pstart);
2709 disk->pend = cpu_to_le64(cpu->pend);
2710 disk->vstart = cpu_to_le64(cpu->vstart);
2711 disk->vend = cpu_to_le64(cpu->vend);
2712 disk->target = cpu_to_le64(cpu->target);
2713 disk->flags = cpu_to_le64(cpu->flags);
2716 /* struct btrfs_super_block */
2717 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2718 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2719 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2721 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2722 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2723 struct btrfs_super_block, sys_chunk_array_size, 32);
2724 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2725 struct btrfs_super_block, chunk_root_generation, 64);
2726 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2728 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2730 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2731 chunk_root_level, 8);
2732 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2734 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2735 log_root_transid, 64);
2736 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2738 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2740 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2742 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2744 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2746 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2748 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2750 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2751 root_dir_objectid, 64);
2752 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2754 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2756 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2757 compat_ro_flags, 64);
2758 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2759 incompat_flags, 64);
2760 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2762 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2763 cache_generation, 64);
2765 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2767 int t = btrfs_super_csum_type(s);
2768 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2769 return btrfs_csum_sizes[t];
2772 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2774 return offsetof(struct btrfs_leaf, items);
2777 /* struct btrfs_file_extent_item */
2778 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2780 static inline unsigned long
2781 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2783 unsigned long offset = (unsigned long)e;
2784 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2788 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2790 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2793 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2795 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2797 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2798 disk_num_bytes, 64);
2799 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2801 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2803 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2805 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2807 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2809 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2810 other_encoding, 16);
2812 /* this returns the number of file bytes represented by the inline item.
2813 * If an item is compressed, this is the uncompressed size
2815 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2816 struct btrfs_file_extent_item *e)
2818 return btrfs_file_extent_ram_bytes(eb, e);
2822 * this returns the number of bytes used by the item on disk, minus the
2823 * size of any extent headers. If a file is compressed on disk, this is
2824 * the compressed size
2826 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2827 struct btrfs_item *e)
2829 unsigned long offset;
2830 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2831 return btrfs_item_size(eb, e) - offset;
2834 /* btrfs_dev_stats_item */
2835 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2836 struct btrfs_dev_stats_item *ptr,
2841 read_extent_buffer(eb, &val,
2842 offsetof(struct btrfs_dev_stats_item, values) +
2843 ((unsigned long)ptr) + (index * sizeof(u64)),
2848 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2849 struct btrfs_dev_stats_item *ptr,
2852 write_extent_buffer(eb, &val,
2853 offsetof(struct btrfs_dev_stats_item, values) +
2854 ((unsigned long)ptr) + (index * sizeof(u64)),
2858 /* btrfs_qgroup_status_item */
2859 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2861 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2863 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2865 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2868 /* btrfs_qgroup_info_item */
2869 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2871 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2872 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2874 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2875 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2878 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2879 struct btrfs_qgroup_info_item, generation, 64);
2880 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2882 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2883 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2884 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2886 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2887 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2889 /* btrfs_qgroup_limit_item */
2890 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2892 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2894 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2896 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2898 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2901 /* btrfs_dev_replace_item */
2902 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2903 struct btrfs_dev_replace_item, src_devid, 64);
2904 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2905 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2907 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2909 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2911 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2913 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2914 num_write_errors, 64);
2915 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2916 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2918 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2920 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2923 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2924 struct btrfs_dev_replace_item, src_devid, 64);
2925 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2926 struct btrfs_dev_replace_item,
2927 cont_reading_from_srcdev_mode, 64);
2928 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2929 struct btrfs_dev_replace_item, replace_state, 64);
2930 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2931 struct btrfs_dev_replace_item, time_started, 64);
2932 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2933 struct btrfs_dev_replace_item, time_stopped, 64);
2934 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2935 struct btrfs_dev_replace_item, num_write_errors, 64);
2936 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2937 struct btrfs_dev_replace_item,
2938 num_uncorrectable_read_errors, 64);
2939 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2940 struct btrfs_dev_replace_item, cursor_left, 64);
2941 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2942 struct btrfs_dev_replace_item, cursor_right, 64);
2944 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2946 return sb->s_fs_info;
2949 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2952 return root->leafsize;
2953 return root->nodesize;
2956 /* helper function to cast into the data area of the leaf. */
2957 #define btrfs_item_ptr(leaf, slot, type) \
2958 ((type *)(btrfs_leaf_data(leaf) + \
2959 btrfs_item_offset_nr(leaf, slot)))
2961 #define btrfs_item_ptr_offset(leaf, slot) \
2962 ((unsigned long)(btrfs_leaf_data(leaf) + \
2963 btrfs_item_offset_nr(leaf, slot)))
2965 static inline struct dentry *fdentry(struct file *file)
2967 return file->f_path.dentry;
2970 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2972 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2973 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2976 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2978 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2982 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2985 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2990 * Doing a truncate won't result in new nodes or leaves, just what we need for
2993 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2996 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3000 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3001 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root, unsigned long count);
3003 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3004 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root, u64 bytenr,
3006 u64 num_bytes, u64 *refs, u64 *flags);
3007 int btrfs_pin_extent(struct btrfs_root *root,
3008 u64 bytenr, u64 num, int reserved);
3009 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3010 u64 bytenr, u64 num_bytes);
3011 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3012 struct btrfs_root *root,
3013 u64 objectid, u64 offset, u64 bytenr);
3014 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3015 struct btrfs_fs_info *info,
3017 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3018 u64 btrfs_find_block_group(struct btrfs_root *root,
3019 u64 search_start, u64 search_hint, int owner);
3020 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3021 struct btrfs_root *root, u32 blocksize,
3022 u64 parent, u64 root_objectid,
3023 struct btrfs_disk_key *key, int level,
3024 u64 hint, u64 empty_size);
3025 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct extent_buffer *buf,
3028 u64 parent, int last_ref);
3029 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root,
3031 u64 bytenr, u32 blocksize,
3033 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 u64 root_objectid, u64 owner,
3036 u64 offset, struct btrfs_key *ins);
3037 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3038 struct btrfs_root *root,
3039 u64 root_objectid, u64 owner, u64 offset,
3040 struct btrfs_key *ins);
3041 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
3042 struct btrfs_root *root,
3043 u64 num_bytes, u64 min_alloc_size,
3044 u64 empty_size, u64 hint_byte,
3045 struct btrfs_key *ins, u64 data);
3046 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3047 struct extent_buffer *buf, int full_backref, int for_cow);
3048 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3049 struct extent_buffer *buf, int full_backref, int for_cow);
3050 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3051 struct btrfs_root *root,
3052 u64 bytenr, u64 num_bytes, u64 flags,
3054 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3055 struct btrfs_root *root,
3056 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3057 u64 owner, u64 offset, int for_cow);
3059 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3060 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3061 u64 start, u64 len);
3062 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root);
3064 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3065 struct btrfs_root *root);
3066 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3067 struct btrfs_root *root,
3068 u64 bytenr, u64 num_bytes, u64 parent,
3069 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3071 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3072 struct btrfs_root *root);
3073 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3074 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3075 int btrfs_read_block_groups(struct btrfs_root *root);
3076 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3077 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3078 struct btrfs_root *root, u64 bytes_used,
3079 u64 type, u64 chunk_objectid, u64 chunk_offset,
3081 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3082 struct btrfs_root *root, u64 group_start);
3083 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root);
3085 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
3086 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3087 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3089 enum btrfs_reserve_flush_enum {
3090 /* If we are in the transaction, we can't flush anything.*/
3091 BTRFS_RESERVE_NO_FLUSH,
3093 * Flushing delalloc may cause deadlock somewhere, in this
3094 * case, use FLUSH LIMIT
3096 BTRFS_RESERVE_FLUSH_LIMIT,
3097 BTRFS_RESERVE_FLUSH_ALL,
3100 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3101 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3102 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3103 struct btrfs_root *root);
3104 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3105 struct inode *inode);
3106 void btrfs_orphan_release_metadata(struct inode *inode);
3107 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
3108 struct btrfs_pending_snapshot *pending);
3109 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3110 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3111 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3112 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3113 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3114 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3115 unsigned short type);
3116 void btrfs_free_block_rsv(struct btrfs_root *root,
3117 struct btrfs_block_rsv *rsv);
3118 int btrfs_block_rsv_add(struct btrfs_root *root,
3119 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3120 enum btrfs_reserve_flush_enum flush);
3121 int btrfs_block_rsv_check(struct btrfs_root *root,
3122 struct btrfs_block_rsv *block_rsv, int min_factor);
3123 int btrfs_block_rsv_refill(struct btrfs_root *root,
3124 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3125 enum btrfs_reserve_flush_enum flush);
3126 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3127 struct btrfs_block_rsv *dst_rsv,
3129 void btrfs_block_rsv_release(struct btrfs_root *root,
3130 struct btrfs_block_rsv *block_rsv,
3132 int btrfs_set_block_group_ro(struct btrfs_root *root,
3133 struct btrfs_block_group_cache *cache);
3134 void btrfs_set_block_group_rw(struct btrfs_root *root,
3135 struct btrfs_block_group_cache *cache);
3136 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3137 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3138 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3139 u64 start, u64 end);
3140 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3141 u64 num_bytes, u64 *actual_bytes);
3142 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3143 struct btrfs_root *root, u64 type);
3144 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3146 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3147 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3148 struct btrfs_fs_info *fs_info);
3149 int __get_raid_index(u64 flags);
3151 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3152 int level, int *slot);
3153 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3154 int btrfs_previous_item(struct btrfs_root *root,
3155 struct btrfs_path *path, u64 min_objectid,
3157 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
3158 struct btrfs_root *root, struct btrfs_path *path,
3159 struct btrfs_key *new_key);
3160 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3161 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3162 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3163 struct btrfs_key *key, int lowest_level,
3165 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3166 struct btrfs_key *max_key,
3167 struct btrfs_path *path,
3169 enum btrfs_compare_tree_result {
3170 BTRFS_COMPARE_TREE_NEW,
3171 BTRFS_COMPARE_TREE_DELETED,
3172 BTRFS_COMPARE_TREE_CHANGED,
3174 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3175 struct btrfs_root *right_root,
3176 struct btrfs_path *left_path,
3177 struct btrfs_path *right_path,
3178 struct btrfs_key *key,
3179 enum btrfs_compare_tree_result result,
3181 int btrfs_compare_trees(struct btrfs_root *left_root,
3182 struct btrfs_root *right_root,
3183 btrfs_changed_cb_t cb, void *ctx);
3184 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3185 struct btrfs_root *root, struct extent_buffer *buf,
3186 struct extent_buffer *parent, int parent_slot,
3187 struct extent_buffer **cow_ret);
3188 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3189 struct btrfs_root *root,
3190 struct extent_buffer *buf,
3191 struct extent_buffer **cow_ret, u64 new_root_objectid);
3192 int btrfs_block_can_be_shared(struct btrfs_root *root,
3193 struct extent_buffer *buf);
3194 void btrfs_extend_item(struct btrfs_trans_handle *trans,
3195 struct btrfs_root *root, struct btrfs_path *path,
3197 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
3198 struct btrfs_root *root,
3199 struct btrfs_path *path,
3200 u32 new_size, int from_end);
3201 int btrfs_split_item(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root,
3203 struct btrfs_path *path,
3204 struct btrfs_key *new_key,
3205 unsigned long split_offset);
3206 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root,
3208 struct btrfs_path *path,
3209 struct btrfs_key *new_key);
3210 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3211 *root, struct btrfs_key *key, struct btrfs_path *p, int
3213 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3214 struct btrfs_path *p, u64 time_seq);
3215 int btrfs_search_slot_for_read(struct btrfs_root *root,
3216 struct btrfs_key *key, struct btrfs_path *p,
3217 int find_higher, int return_any);
3218 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3219 struct btrfs_root *root, struct extent_buffer *parent,
3220 int start_slot, u64 *last_ret,
3221 struct btrfs_key *progress);
3222 void btrfs_release_path(struct btrfs_path *p);
3223 struct btrfs_path *btrfs_alloc_path(void);
3224 void btrfs_free_path(struct btrfs_path *p);
3225 void btrfs_set_path_blocking(struct btrfs_path *p);
3226 void btrfs_clear_path_blocking(struct btrfs_path *p,
3227 struct extent_buffer *held, int held_rw);
3228 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3230 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3231 struct btrfs_path *path, int slot, int nr);
3232 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3233 struct btrfs_root *root,
3234 struct btrfs_path *path)
3236 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3239 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3240 struct btrfs_root *root, struct btrfs_path *path,
3241 struct btrfs_key *cpu_key, u32 *data_size,
3242 u32 total_data, u32 total_size, int nr);
3243 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3244 *root, struct btrfs_key *key, void *data, u32 data_size);
3245 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3246 struct btrfs_root *root,
3247 struct btrfs_path *path,
3248 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3250 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3251 struct btrfs_root *root,
3252 struct btrfs_path *path,
3253 struct btrfs_key *key,
3256 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3259 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3260 int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
3261 struct btrfs_root *root, struct btrfs_path *path,
3263 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3265 static inline int btrfs_next_old_item(struct btrfs_root *root,
3266 struct btrfs_path *p, u64 time_seq)
3269 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3270 return btrfs_next_old_leaf(root, p, time_seq);
3273 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3275 return btrfs_next_old_item(root, p, 0);
3277 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3278 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3279 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3280 struct btrfs_block_rsv *block_rsv,
3281 int update_ref, int for_reloc);
3282 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3283 struct btrfs_root *root,
3284 struct extent_buffer *node,
3285 struct extent_buffer *parent);
3286 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3289 * Get synced with close_ctree()
3292 return fs_info->closing;
3294 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3296 kfree(fs_info->balance_ctl);
3297 kfree(fs_info->delayed_root);
3298 kfree(fs_info->extent_root);
3299 kfree(fs_info->tree_root);
3300 kfree(fs_info->chunk_root);
3301 kfree(fs_info->dev_root);
3302 kfree(fs_info->csum_root);
3303 kfree(fs_info->quota_root);
3304 kfree(fs_info->super_copy);
3305 kfree(fs_info->super_for_commit);
3309 /* tree mod log functions from ctree.c */
3310 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3311 struct seq_list *elem);
3312 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3313 struct seq_list *elem);
3314 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3316 return atomic_inc_return(&fs_info->tree_mod_seq);
3318 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3321 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3322 struct btrfs_path *path,
3323 u64 root_id, u64 ref_id);
3324 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3325 struct btrfs_root *tree_root,
3326 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3327 const char *name, int name_len);
3328 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3329 struct btrfs_root *tree_root,
3330 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3331 const char *name, int name_len);
3332 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3333 struct btrfs_key *key);
3334 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3335 *root, struct btrfs_key *key, struct btrfs_root_item
3337 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3338 struct btrfs_root *root,
3339 struct btrfs_key *key,
3340 struct btrfs_root_item *item);
3341 void btrfs_read_root_item(struct btrfs_root *root,
3342 struct extent_buffer *eb, int slot,
3343 struct btrfs_root_item *item);
3344 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3345 btrfs_root_item *item, struct btrfs_key *key);
3346 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3347 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3348 void btrfs_set_root_node(struct btrfs_root_item *item,
3349 struct extent_buffer *node);
3350 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3351 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3352 struct btrfs_root *root);
3355 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3356 const char *name, int name_len);
3357 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3358 struct btrfs_root *root, const char *name,
3359 int name_len, struct inode *dir,
3360 struct btrfs_key *location, u8 type, u64 index);
3361 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3362 struct btrfs_root *root,
3363 struct btrfs_path *path, u64 dir,
3364 const char *name, int name_len,
3366 struct btrfs_dir_item *
3367 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3368 struct btrfs_root *root,
3369 struct btrfs_path *path, u64 dir,
3370 u64 objectid, const char *name, int name_len,
3372 struct btrfs_dir_item *
3373 btrfs_search_dir_index_item(struct btrfs_root *root,
3374 struct btrfs_path *path, u64 dirid,
3375 const char *name, int name_len);
3376 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3377 struct btrfs_path *path,
3378 const char *name, int name_len);
3379 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3380 struct btrfs_root *root,
3381 struct btrfs_path *path,
3382 struct btrfs_dir_item *di);
3383 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3384 struct btrfs_root *root,
3385 struct btrfs_path *path, u64 objectid,
3386 const char *name, u16 name_len,
3387 const void *data, u16 data_len);
3388 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3389 struct btrfs_root *root,
3390 struct btrfs_path *path, u64 dir,
3391 const char *name, u16 name_len,
3393 int verify_dir_item(struct btrfs_root *root,
3394 struct extent_buffer *leaf,
3395 struct btrfs_dir_item *dir_item);
3398 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3399 struct btrfs_root *root, u64 offset);
3400 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3401 struct btrfs_root *root, u64 offset);
3402 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3405 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3406 struct btrfs_root *root,
3407 const char *name, int name_len,
3408 u64 inode_objectid, u64 ref_objectid, u64 index);
3409 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3410 struct btrfs_root *root,
3411 const char *name, int name_len,
3412 u64 inode_objectid, u64 ref_objectid, u64 *index);
3413 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3414 struct btrfs_root *root,
3415 struct btrfs_path *path,
3416 const char *name, int name_len,
3417 u64 inode_objectid, u64 ref_objectid, int mod,
3419 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3420 struct btrfs_root *root,
3421 struct btrfs_path *path, u64 objectid);
3422 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3423 *root, struct btrfs_path *path,
3424 struct btrfs_key *location, int mod);
3426 struct btrfs_inode_extref *
3427 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3428 struct btrfs_root *root,
3429 struct btrfs_path *path,
3430 const char *name, int name_len,
3431 u64 inode_objectid, u64 ref_objectid, int ins_len,
3434 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3435 u64 ref_objectid, const char *name,
3437 struct btrfs_inode_extref **extref_ret);
3440 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3441 struct btrfs_root *root, u64 bytenr, u64 len);
3442 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3443 struct bio *bio, u32 *dst);
3444 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3445 struct bio *bio, u64 logical_offset);
3446 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3447 struct btrfs_root *root,
3448 u64 objectid, u64 pos,
3449 u64 disk_offset, u64 disk_num_bytes,
3450 u64 num_bytes, u64 offset, u64 ram_bytes,
3451 u8 compression, u8 encryption, u16 other_encoding);
3452 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3453 struct btrfs_root *root,
3454 struct btrfs_path *path, u64 objectid,
3455 u64 bytenr, int mod);
3456 u64 btrfs_file_extent_length(struct btrfs_path *path);
3457 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3458 struct btrfs_root *root,
3459 struct btrfs_ordered_sum *sums);
3460 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3461 struct bio *bio, u64 file_start, int contig);
3462 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3463 struct btrfs_root *root,
3464 struct btrfs_path *path,
3465 u64 bytenr, int cow);
3466 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3467 struct btrfs_root *root, struct btrfs_path *path,
3469 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3470 struct list_head *list, int search_commit);
3472 struct btrfs_delalloc_work {
3473 struct inode *inode;
3476 struct completion completion;
3477 struct list_head list;
3478 struct btrfs_work work;
3481 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3482 int wait, int delay_iput);
3483 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3485 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3486 size_t pg_offset, u64 start, u64 len,
3489 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3490 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3491 #define ClearPageChecked ClearPageFsMisc
3492 #define SetPageChecked SetPageFsMisc
3493 #define PageChecked PageFsMisc
3496 /* This forces readahead on a given range of bytes in an inode */
3497 static inline void btrfs_force_ra(struct address_space *mapping,
3498 struct file_ra_state *ra, struct file *file,
3499 pgoff_t offset, unsigned long req_size)
3501 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3504 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3505 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3506 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3507 struct btrfs_root *root,
3508 struct inode *dir, struct inode *inode,
3509 const char *name, int name_len);
3510 int btrfs_add_link(struct btrfs_trans_handle *trans,
3511 struct inode *parent_inode, struct inode *inode,
3512 const char *name, int name_len, int add_backref, u64 index);
3513 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3514 struct btrfs_root *root,
3515 struct inode *dir, u64 objectid,
3516 const char *name, int name_len);
3517 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3519 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3520 struct btrfs_root *root,
3521 struct inode *inode, u64 new_size,
3524 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3525 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3526 struct extent_state **cached_state);
3527 int btrfs_writepages(struct address_space *mapping,
3528 struct writeback_control *wbc);
3529 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3530 struct btrfs_root *new_root, u64 new_dirid);
3531 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3532 size_t size, struct bio *bio,
3533 unsigned long bio_flags);
3534 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3535 int btrfs_readpage(struct file *file, struct page *page);
3536 void btrfs_evict_inode(struct inode *inode);
3537 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3538 int btrfs_dirty_inode(struct inode *inode);
3539 struct inode *btrfs_alloc_inode(struct super_block *sb);
3540 void btrfs_destroy_inode(struct inode *inode);
3541 int btrfs_drop_inode(struct inode *inode);
3542 int btrfs_init_cachep(void);
3543 void btrfs_destroy_cachep(void);
3544 long btrfs_ioctl_trans_end(struct file *file);
3545 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3546 struct btrfs_root *root, int *was_new);
3547 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3548 size_t pg_offset, u64 start, u64 end,
3550 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3551 struct btrfs_root *root,
3552 struct inode *inode);
3553 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3554 struct btrfs_root *root, struct inode *inode);
3555 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3556 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3557 int btrfs_orphan_cleanup(struct btrfs_root *root);
3558 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3559 struct btrfs_root *root);
3560 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3561 void btrfs_invalidate_inodes(struct btrfs_root *root);
3562 void btrfs_add_delayed_iput(struct inode *inode);
3563 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3564 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3565 u64 start, u64 num_bytes, u64 min_size,
3566 loff_t actual_len, u64 *alloc_hint);
3567 int btrfs_prealloc_file_range_trans(struct inode *inode,
3568 struct btrfs_trans_handle *trans, int mode,
3569 u64 start, u64 num_bytes, u64 min_size,
3570 loff_t actual_len, u64 *alloc_hint);
3571 extern const struct dentry_operations btrfs_dentry_operations;
3574 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3575 void btrfs_update_iflags(struct inode *inode);
3576 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3577 int btrfs_defrag_file(struct inode *inode, struct file *file,
3578 struct btrfs_ioctl_defrag_range_args *range,
3579 u64 newer_than, unsigned long max_pages);
3580 void btrfs_get_block_group_info(struct list_head *groups_list,
3581 struct btrfs_ioctl_space_info *space);
3584 int btrfs_auto_defrag_init(void);
3585 void btrfs_auto_defrag_exit(void);
3586 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3587 struct inode *inode);
3588 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3589 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3590 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3591 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3593 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3594 u64 start, u64 end, int skip_pinned,
3596 extern const struct file_operations btrfs_file_operations;
3597 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3598 struct btrfs_root *root, struct inode *inode,
3599 struct btrfs_path *path, u64 start, u64 end,
3600 u64 *drop_end, int drop_cache);
3601 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3602 struct btrfs_root *root, struct inode *inode, u64 start,
3603 u64 end, int drop_cache);
3604 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3605 struct inode *inode, u64 start, u64 end);
3606 int btrfs_release_file(struct inode *inode, struct file *file);
3607 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3608 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3609 struct page **pages, size_t num_pages,
3610 loff_t pos, size_t write_bytes,
3611 struct extent_state **cached);
3614 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root);
3618 int btrfs_init_sysfs(void);
3619 void btrfs_exit_sysfs(void);
3622 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3625 int btrfs_parse_options(struct btrfs_root *root, char *options);
3626 int btrfs_sync_fs(struct super_block *sb, int wait);
3628 #ifdef CONFIG_PRINTK
3630 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3632 static inline __printf(2, 3)
3633 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3639 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3640 unsigned int line, int errno, const char *fmt, ...);
3643 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3644 struct btrfs_root *root, const char *function,
3645 unsigned int line, int errno);
3647 #define btrfs_set_fs_incompat(__fs_info, opt) \
3648 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3650 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3653 struct btrfs_super_block *disk_super;
3656 disk_super = fs_info->super_copy;
3657 features = btrfs_super_incompat_flags(disk_super);
3658 if (!(features & flag)) {
3660 btrfs_set_super_incompat_flags(disk_super, features);
3665 * Call btrfs_abort_transaction as early as possible when an error condition is
3666 * detected, that way the exact line number is reported.
3669 #define btrfs_abort_transaction(trans, root, errno) \
3671 __btrfs_abort_transaction(trans, root, __func__, \
3675 #define btrfs_std_error(fs_info, errno) \
3678 __btrfs_std_error((fs_info), __func__, \
3679 __LINE__, (errno), NULL); \
3682 #define btrfs_error(fs_info, errno, fmt, args...) \
3684 __btrfs_std_error((fs_info), __func__, __LINE__, \
3685 (errno), fmt, ##args); \
3689 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3690 unsigned int line, int errno, const char *fmt, ...);
3693 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3694 * will panic(). Otherwise we BUG() here.
3696 #define btrfs_panic(fs_info, errno, fmt, args...) \
3698 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3703 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3704 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3705 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3706 struct inode *inode, struct inode *dir);
3707 int btrfs_acl_chmod(struct inode *inode);
3709 #define btrfs_get_acl NULL
3710 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3711 struct inode *inode, struct inode *dir)
3715 static inline int btrfs_acl_chmod(struct inode *inode)
3722 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3723 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3724 struct btrfs_root *root);
3725 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3726 struct btrfs_root *root);
3727 int btrfs_recover_relocation(struct btrfs_root *root);
3728 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3729 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3730 struct btrfs_root *root, struct extent_buffer *buf,
3731 struct extent_buffer *cow);
3732 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3733 struct btrfs_pending_snapshot *pending,
3734 u64 *bytes_to_reserve);
3735 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3736 struct btrfs_pending_snapshot *pending);
3739 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3740 u64 end, struct btrfs_scrub_progress *progress,
3741 int readonly, int is_dev_replace);
3742 void btrfs_scrub_pause(struct btrfs_root *root);
3743 void btrfs_scrub_pause_super(struct btrfs_root *root);
3744 void btrfs_scrub_continue(struct btrfs_root *root);
3745 void btrfs_scrub_continue_super(struct btrfs_root *root);
3746 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3747 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3748 struct btrfs_device *dev);
3749 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3750 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3751 struct btrfs_scrub_progress *progress);
3754 struct reada_control {
3755 struct btrfs_root *root; /* tree to prefetch */
3756 struct btrfs_key key_start;
3757 struct btrfs_key key_end; /* exclusive */
3760 wait_queue_head_t wait;
3762 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3763 struct btrfs_key *start, struct btrfs_key *end);
3764 int btrfs_reada_wait(void *handle);
3765 void btrfs_reada_detach(void *handle);
3766 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3767 u64 start, int err);
3770 struct qgroup_update {
3771 struct list_head list;
3772 struct btrfs_delayed_ref_node *node;
3773 struct btrfs_delayed_extent_op *extent_op;
3776 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3777 struct btrfs_fs_info *fs_info);
3778 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3779 struct btrfs_fs_info *fs_info);
3780 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3781 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3782 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3783 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3784 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3785 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3786 struct btrfs_fs_info *fs_info, u64 qgroupid,
3788 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3789 struct btrfs_fs_info *fs_info, u64 qgroupid);
3790 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3791 struct btrfs_fs_info *fs_info, u64 qgroupid,
3792 struct btrfs_qgroup_limit *limit);
3793 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3794 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3795 struct btrfs_delayed_extent_op;
3796 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3797 struct btrfs_delayed_ref_node *node,
3798 struct btrfs_delayed_extent_op *extent_op);
3799 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3800 struct btrfs_fs_info *fs_info,
3801 struct btrfs_delayed_ref_node *node,
3802 struct btrfs_delayed_extent_op *extent_op);
3803 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3804 struct btrfs_fs_info *fs_info);
3805 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3806 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3807 struct btrfs_qgroup_inherit *inherit);
3808 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3809 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3811 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3813 static inline int is_fstree(u64 rootid)
3815 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3816 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
3821 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3823 return signal_pending(current);