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 /* holds quota configuration and tracking */
92 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
94 /* for storing items that use the BTRFS_UUID_KEY* types */
95 #define BTRFS_UUID_TREE_OBJECTID 9ULL
97 /* for storing balance parameters in the root tree */
98 #define BTRFS_BALANCE_OBJECTID -4ULL
100 /* orhpan objectid for tracking unlinked/truncated files */
101 #define BTRFS_ORPHAN_OBJECTID -5ULL
103 /* does write ahead logging to speed up fsyncs */
104 #define BTRFS_TREE_LOG_OBJECTID -6ULL
105 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
107 /* for space balancing */
108 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
109 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
112 * extent checksums all have this objectid
113 * this allows them to share the logging tree
116 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
118 /* For storing free space cache */
119 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
122 * The inode number assigned to the special inode for storing
125 #define BTRFS_FREE_INO_OBJECTID -12ULL
127 /* dummy objectid represents multiple objectids */
128 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
131 * All files have objectids in this range.
133 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
134 #define BTRFS_LAST_FREE_OBJECTID -256ULL
135 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
139 * the device items go into the chunk tree. The key is in the form
140 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
142 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
144 #define BTRFS_BTREE_INODE_OBJECTID 1
146 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
148 #define BTRFS_DEV_REPLACE_DEVID 0
151 * the max metadata block size. This limit is somewhat artificial,
152 * but the memmove costs go through the roof for larger blocks.
154 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
157 * we can actually store much bigger names, but lets not confuse the rest
160 #define BTRFS_NAME_LEN 255
163 * Theoretical limit is larger, but we keep this down to a sane
164 * value. That should limit greatly the possibility of collisions on
167 #define BTRFS_LINK_MAX 65535U
169 /* 32 bytes in various csum fields */
170 #define BTRFS_CSUM_SIZE 32
173 #define BTRFS_CSUM_TYPE_CRC32 0
175 static int btrfs_csum_sizes[] = { 4, 0 };
177 /* four bytes for CRC32 */
178 #define BTRFS_EMPTY_DIR_SIZE 0
180 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
181 #define REQ_GET_READ_MIRRORS (1 << 30)
183 #define BTRFS_FT_UNKNOWN 0
184 #define BTRFS_FT_REG_FILE 1
185 #define BTRFS_FT_DIR 2
186 #define BTRFS_FT_CHRDEV 3
187 #define BTRFS_FT_BLKDEV 4
188 #define BTRFS_FT_FIFO 5
189 #define BTRFS_FT_SOCK 6
190 #define BTRFS_FT_SYMLINK 7
191 #define BTRFS_FT_XATTR 8
192 #define BTRFS_FT_MAX 9
194 /* ioprio of readahead is set to idle */
195 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
197 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
200 * The key defines the order in the tree, and so it also defines (optimal)
203 * objectid corresponds to the inode number.
205 * type tells us things about the object, and is a kind of stream selector.
206 * so for a given inode, keys with type of 1 might refer to the inode data,
207 * type of 2 may point to file data in the btree and type == 3 may point to
210 * offset is the starting byte offset for this key in the stream.
212 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
213 * in cpu native order. Otherwise they are identical and their sizes
214 * should be the same (ie both packed)
216 struct btrfs_disk_key {
220 } __attribute__ ((__packed__));
226 } __attribute__ ((__packed__));
228 struct btrfs_mapping_tree {
229 struct extent_map_tree map_tree;
232 struct btrfs_dev_item {
233 /* the internal btrfs device id */
236 /* size of the device */
242 /* optimal io alignment for this device */
245 /* optimal io width for this device */
248 /* minimal io size for this device */
251 /* type and info about this device */
254 /* expected generation for this device */
258 * starting byte of this partition on the device,
259 * to allow for stripe alignment in the future
263 /* grouping information for allocation decisions */
266 /* seek speed 0-100 where 100 is fastest */
269 /* bandwidth 0-100 where 100 is fastest */
272 /* btrfs generated uuid for this device */
273 u8 uuid[BTRFS_UUID_SIZE];
275 /* uuid of FS who owns this device */
276 u8 fsid[BTRFS_UUID_SIZE];
277 } __attribute__ ((__packed__));
279 struct btrfs_stripe {
282 u8 dev_uuid[BTRFS_UUID_SIZE];
283 } __attribute__ ((__packed__));
286 /* size of this chunk in bytes */
289 /* objectid of the root referencing this chunk */
295 /* optimal io alignment for this chunk */
298 /* optimal io width for this chunk */
301 /* minimal io size for this chunk */
304 /* 2^16 stripes is quite a lot, a second limit is the size of a single
309 /* sub stripes only matter for raid10 */
311 struct btrfs_stripe stripe;
312 /* additional stripes go here */
313 } __attribute__ ((__packed__));
315 #define BTRFS_FREE_SPACE_EXTENT 1
316 #define BTRFS_FREE_SPACE_BITMAP 2
318 struct btrfs_free_space_entry {
322 } __attribute__ ((__packed__));
324 struct btrfs_free_space_header {
325 struct btrfs_disk_key location;
329 } __attribute__ ((__packed__));
331 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
333 BUG_ON(num_stripes == 0);
334 return sizeof(struct btrfs_chunk) +
335 sizeof(struct btrfs_stripe) * (num_stripes - 1);
338 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
339 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
344 #define BTRFS_FS_STATE_ERROR 0
345 #define BTRFS_FS_STATE_REMOUNTING 1
346 #define BTRFS_FS_STATE_TRANS_ABORTED 2
348 /* Super block flags */
349 /* Errors detected */
350 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
352 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
353 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
355 #define BTRFS_BACKREF_REV_MAX 256
356 #define BTRFS_BACKREF_REV_SHIFT 56
357 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
358 BTRFS_BACKREF_REV_SHIFT)
360 #define BTRFS_OLD_BACKREF_REV 0
361 #define BTRFS_MIXED_BACKREF_REV 1
364 * every tree block (leaf or node) starts with this header.
366 struct btrfs_header {
367 /* these first four must match the super block */
368 u8 csum[BTRFS_CSUM_SIZE];
369 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
370 __le64 bytenr; /* which block this node is supposed to live in */
373 /* allowed to be different from the super from here on down */
374 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
379 } __attribute__ ((__packed__));
381 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
382 sizeof(struct btrfs_header)) / \
383 sizeof(struct btrfs_key_ptr))
384 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
385 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
386 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
387 sizeof(struct btrfs_item) - \
388 sizeof(struct btrfs_file_extent_item))
389 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
390 sizeof(struct btrfs_item) -\
391 sizeof(struct btrfs_dir_item))
395 * this is a very generous portion of the super block, giving us
396 * room to translate 14 chunks with 3 stripes each.
398 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
399 #define BTRFS_LABEL_SIZE 256
402 * just in case we somehow lose the roots and are not able to mount,
403 * we store an array of the roots from previous transactions
406 #define BTRFS_NUM_BACKUP_ROOTS 4
407 struct btrfs_root_backup {
409 __le64 tree_root_gen;
412 __le64 chunk_root_gen;
415 __le64 extent_root_gen;
424 __le64 csum_root_gen;
434 u8 extent_root_level;
438 /* future and to align */
440 } __attribute__ ((__packed__));
443 * the super block basically lists the main trees of the FS
444 * it currently lacks any block count etc etc
446 struct btrfs_super_block {
447 u8 csum[BTRFS_CSUM_SIZE];
448 /* the first 4 fields must match struct btrfs_header */
449 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
450 __le64 bytenr; /* this block number */
453 /* allowed to be different from the btrfs_header from here own down */
460 /* this will help find the new super based on the log root */
461 __le64 log_root_transid;
464 __le64 root_dir_objectid;
470 __le32 sys_chunk_array_size;
471 __le64 chunk_root_generation;
473 __le64 compat_ro_flags;
474 __le64 incompat_flags;
479 struct btrfs_dev_item dev_item;
481 char label[BTRFS_LABEL_SIZE];
483 __le64 cache_generation;
485 /* future expansion */
487 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
488 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
489 } __attribute__ ((__packed__));
492 * Compat flags that we support. If any incompat flags are set other than the
493 * ones specified below then we will fail to mount
495 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
496 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
497 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
498 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
500 * some patches floated around with a second compression method
501 * lets save that incompat here for when they do get in
502 * Note we don't actually support it, we're just reserving the
505 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
508 * older kernels tried to do bigger metadata blocks, but the
509 * code was pretty buggy. Lets not let them try anymore.
511 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
513 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
514 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
515 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
517 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
518 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
519 #define BTRFS_FEATURE_INCOMPAT_SUPP \
520 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
521 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
522 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
523 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
524 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
525 BTRFS_FEATURE_INCOMPAT_RAID56 | \
526 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
527 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
530 * A leaf is full of items. offset and size tell us where to find
531 * the item in the leaf (relative to the start of the data area)
534 struct btrfs_disk_key key;
537 } __attribute__ ((__packed__));
540 * leaves have an item area and a data area:
541 * [item0, item1....itemN] [free space] [dataN...data1, data0]
543 * The data is separate from the items to get the keys closer together
547 struct btrfs_header header;
548 struct btrfs_item items[];
549 } __attribute__ ((__packed__));
552 * all non-leaf blocks are nodes, they hold only keys and pointers to
555 struct btrfs_key_ptr {
556 struct btrfs_disk_key key;
559 } __attribute__ ((__packed__));
562 struct btrfs_header header;
563 struct btrfs_key_ptr ptrs[];
564 } __attribute__ ((__packed__));
567 * btrfs_paths remember the path taken from the root down to the leaf.
568 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
569 * to any other levels that are present.
571 * The slots array records the index of the item or block pointer
572 * used while walking the tree.
575 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
576 int slots[BTRFS_MAX_LEVEL];
577 /* if there is real range locking, this locks field will change */
578 int locks[BTRFS_MAX_LEVEL];
580 /* keep some upper locks as we walk down */
584 * set by btrfs_split_item, tells search_slot to keep all locks
585 * and to force calls to keep space in the nodes
587 unsigned int search_for_split:1;
588 unsigned int keep_locks:1;
589 unsigned int skip_locking:1;
590 unsigned int leave_spinning:1;
591 unsigned int search_commit_root:1;
595 * items in the extent btree are used to record the objectid of the
596 * owner of the block and the number of references
599 struct btrfs_extent_item {
603 } __attribute__ ((__packed__));
605 struct btrfs_extent_item_v0 {
607 } __attribute__ ((__packed__));
609 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
610 sizeof(struct btrfs_item))
612 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
613 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
615 /* following flags only apply to tree blocks */
617 /* use full backrefs for extent pointers in the block */
618 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
621 * this flag is only used internally by scrub and may be changed at any time
622 * it is only declared here to avoid collisions
624 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
626 struct btrfs_tree_block_info {
627 struct btrfs_disk_key key;
629 } __attribute__ ((__packed__));
631 struct btrfs_extent_data_ref {
636 } __attribute__ ((__packed__));
638 struct btrfs_shared_data_ref {
640 } __attribute__ ((__packed__));
642 struct btrfs_extent_inline_ref {
645 } __attribute__ ((__packed__));
647 /* old style backrefs item */
648 struct btrfs_extent_ref_v0 {
653 } __attribute__ ((__packed__));
656 /* dev extents record free space on individual devices. The owner
657 * field points back to the chunk allocation mapping tree that allocated
658 * the extent. The chunk tree uuid field is a way to double check the owner
660 struct btrfs_dev_extent {
662 __le64 chunk_objectid;
665 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
666 } __attribute__ ((__packed__));
668 struct btrfs_inode_ref {
672 } __attribute__ ((__packed__));
674 struct btrfs_inode_extref {
675 __le64 parent_objectid;
680 } __attribute__ ((__packed__));
682 struct btrfs_timespec {
685 } __attribute__ ((__packed__));
687 enum btrfs_compression_type {
688 BTRFS_COMPRESS_NONE = 0,
689 BTRFS_COMPRESS_ZLIB = 1,
690 BTRFS_COMPRESS_LZO = 2,
691 BTRFS_COMPRESS_TYPES = 2,
692 BTRFS_COMPRESS_LAST = 3,
695 struct btrfs_inode_item {
696 /* nfs style generation number */
698 /* transid that last touched this inode */
710 /* modification sequence number for NFS */
714 * a little future expansion, for more than this we can
715 * just grow the inode item and version it
718 struct btrfs_timespec atime;
719 struct btrfs_timespec ctime;
720 struct btrfs_timespec mtime;
721 struct btrfs_timespec otime;
722 } __attribute__ ((__packed__));
724 struct btrfs_dir_log_item {
726 } __attribute__ ((__packed__));
728 struct btrfs_dir_item {
729 struct btrfs_disk_key location;
734 } __attribute__ ((__packed__));
736 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
738 struct btrfs_root_item {
739 struct btrfs_inode_item inode;
745 __le64 last_snapshot;
748 struct btrfs_disk_key drop_progress;
753 * The following fields appear after subvol_uuids+subvol_times
758 * This generation number is used to test if the new fields are valid
759 * and up to date while reading the root item. Everytime the root item
760 * is written out, the "generation" field is copied into this field. If
761 * anyone ever mounted the fs with an older kernel, we will have
762 * mismatching generation values here and thus must invalidate the
763 * new fields. See btrfs_update_root and btrfs_find_last_root for
765 * the offset of generation_v2 is also used as the start for the memset
766 * when invalidating the fields.
768 __le64 generation_v2;
769 u8 uuid[BTRFS_UUID_SIZE];
770 u8 parent_uuid[BTRFS_UUID_SIZE];
771 u8 received_uuid[BTRFS_UUID_SIZE];
772 __le64 ctransid; /* updated when an inode changes */
773 __le64 otransid; /* trans when created */
774 __le64 stransid; /* trans when sent. non-zero for received subvol */
775 __le64 rtransid; /* trans when received. non-zero for received subvol */
776 struct btrfs_timespec ctime;
777 struct btrfs_timespec otime;
778 struct btrfs_timespec stime;
779 struct btrfs_timespec rtime;
780 __le64 reserved[8]; /* for future */
781 } __attribute__ ((__packed__));
784 * this is used for both forward and backward root refs
786 struct btrfs_root_ref {
790 } __attribute__ ((__packed__));
792 struct btrfs_disk_balance_args {
794 * profiles to operate on, single is denoted by
795 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
805 /* devid subset filter [pstart..pend) */
809 /* btrfs virtual address space subset filter [vstart..vend) */
814 * profile to convert to, single is denoted by
815 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
819 /* BTRFS_BALANCE_ARGS_* */
823 } __attribute__ ((__packed__));
826 * store balance parameters to disk so that balance can be properly
827 * resumed after crash or unmount
829 struct btrfs_balance_item {
830 /* BTRFS_BALANCE_* */
833 struct btrfs_disk_balance_args data;
834 struct btrfs_disk_balance_args meta;
835 struct btrfs_disk_balance_args sys;
838 } __attribute__ ((__packed__));
840 #define BTRFS_FILE_EXTENT_INLINE 0
841 #define BTRFS_FILE_EXTENT_REG 1
842 #define BTRFS_FILE_EXTENT_PREALLOC 2
844 struct btrfs_file_extent_item {
846 * transaction id that created this extent
850 * max number of bytes to hold this extent in ram
851 * when we split a compressed extent we can't know how big
852 * each of the resulting pieces will be. So, this is
853 * an upper limit on the size of the extent in ram instead of
859 * 32 bits for the various ways we might encode the data,
860 * including compression and encryption. If any of these
861 * are set to something a given disk format doesn't understand
862 * it is treated like an incompat flag for reading and writing,
867 __le16 other_encoding; /* spare for later use */
869 /* are we inline data or a real extent? */
873 * disk space consumed by the extent, checksum blocks are included
877 __le64 disk_num_bytes;
879 * the logical offset in file blocks (no csums)
880 * this extent record is for. This allows a file extent to point
881 * into the middle of an existing extent on disk, sharing it
882 * between two snapshots (useful if some bytes in the middle of the
883 * extent have changed
887 * the logical number of file blocks (no csums included). This
888 * always reflects the size uncompressed and without encoding.
892 } __attribute__ ((__packed__));
894 struct btrfs_csum_item {
896 } __attribute__ ((__packed__));
898 struct btrfs_dev_stats_item {
900 * grow this item struct at the end for future enhancements and keep
901 * the existing values unchanged
903 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
904 } __attribute__ ((__packed__));
906 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
907 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
908 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
909 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
910 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
911 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
912 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
914 struct btrfs_dev_replace {
915 u64 replace_state; /* see #define above */
916 u64 time_started; /* seconds since 1-Jan-1970 */
917 u64 time_stopped; /* seconds since 1-Jan-1970 */
918 atomic64_t num_write_errors;
919 atomic64_t num_uncorrectable_read_errors;
922 u64 committed_cursor_left;
923 u64 cursor_left_last_write_of_item;
926 u64 cont_reading_from_srcdev_mode; /* see #define above */
929 int item_needs_writeback;
930 struct btrfs_device *srcdev;
931 struct btrfs_device *tgtdev;
934 atomic_t nesting_level;
935 struct mutex lock_finishing_cancel_unmount;
936 struct mutex lock_management_lock;
939 struct btrfs_scrub_progress scrub_progress;
942 struct btrfs_dev_replace_item {
944 * grow this item struct at the end for future enhancements and keep
945 * the existing values unchanged
950 __le64 cont_reading_from_srcdev_mode;
952 __le64 replace_state;
955 __le64 num_write_errors;
956 __le64 num_uncorrectable_read_errors;
957 } __attribute__ ((__packed__));
959 /* different types of block groups (and chunks) */
960 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
961 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
962 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
963 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
964 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
965 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
966 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
967 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
968 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
969 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
971 enum btrfs_raid_types {
982 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
983 BTRFS_BLOCK_GROUP_SYSTEM | \
984 BTRFS_BLOCK_GROUP_METADATA)
986 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
987 BTRFS_BLOCK_GROUP_RAID1 | \
988 BTRFS_BLOCK_GROUP_RAID5 | \
989 BTRFS_BLOCK_GROUP_RAID6 | \
990 BTRFS_BLOCK_GROUP_DUP | \
991 BTRFS_BLOCK_GROUP_RAID10)
993 * We need a bit for restriper to be able to tell when chunks of type
994 * SINGLE are available. This "extended" profile format is used in
995 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
996 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
997 * to avoid remappings between two formats in future.
999 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1001 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1002 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1004 static inline u64 chunk_to_extended(u64 flags)
1006 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1007 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1011 static inline u64 extended_to_chunk(u64 flags)
1013 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1016 struct btrfs_block_group_item {
1018 __le64 chunk_objectid;
1020 } __attribute__ ((__packed__));
1023 * is subvolume quota turned on?
1025 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1027 * RESCAN is set during the initialization phase
1029 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1031 * Some qgroup entries are known to be out of date,
1032 * either because the configuration has changed in a way that
1033 * makes a rescan necessary, or because the fs has been mounted
1034 * with a non-qgroup-aware version.
1035 * Turning qouta off and on again makes it inconsistent, too.
1037 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1039 #define BTRFS_QGROUP_STATUS_VERSION 1
1041 struct btrfs_qgroup_status_item {
1044 * the generation is updated during every commit. As older
1045 * versions of btrfs are not aware of qgroups, it will be
1046 * possible to detect inconsistencies by checking the
1047 * generation on mount time
1051 /* flag definitions see above */
1055 * only used during scanning to record the progress
1056 * of the scan. It contains a logical address
1059 } __attribute__ ((__packed__));
1061 struct btrfs_qgroup_info_item {
1067 } __attribute__ ((__packed__));
1069 /* flags definition for qgroup limits */
1070 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1071 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1072 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1073 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1074 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1075 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1077 struct btrfs_qgroup_limit_item {
1079 * only updated when any of the other values change
1086 } __attribute__ ((__packed__));
1088 struct btrfs_space_info {
1091 u64 total_bytes; /* total bytes in the space,
1092 this doesn't take mirrors into account */
1093 u64 bytes_used; /* total bytes used,
1094 this doesn't take mirrors into account */
1095 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1096 transaction finishes */
1097 u64 bytes_reserved; /* total bytes the allocator has reserved for
1098 current allocations */
1099 u64 bytes_readonly; /* total bytes that are read only */
1101 u64 bytes_may_use; /* number of bytes that may be used for
1102 delalloc/allocations */
1103 u64 disk_used; /* total bytes used on disk */
1104 u64 disk_total; /* total bytes on disk, takes mirrors into
1108 * bytes_pinned is kept in line with what is actually pinned, as in
1109 * we've called update_block_group and dropped the bytes_used counter
1110 * and increased the bytes_pinned counter. However this means that
1111 * bytes_pinned does not reflect the bytes that will be pinned once the
1112 * delayed refs are flushed, so this counter is inc'ed everytime we call
1113 * btrfs_free_extent so it is a realtime count of what will be freed
1114 * once the transaction is committed. It will be zero'ed everytime the
1115 * transaction commits.
1117 struct percpu_counter total_bytes_pinned;
1120 * we bump reservation progress every time we decrement
1121 * bytes_reserved. This way people waiting for reservations
1122 * know something good has happened and they can check
1123 * for progress. The number here isn't to be trusted, it
1124 * just shows reclaim activity
1126 unsigned long reservation_progress;
1128 unsigned int full:1; /* indicates that we cannot allocate any more
1129 chunks for this space */
1130 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1132 unsigned int flush:1; /* set if we are trying to make space */
1134 unsigned int force_alloc; /* set if we need to force a chunk
1135 alloc for this space */
1137 struct list_head list;
1139 /* for block groups in our same type */
1140 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1142 struct rw_semaphore groups_sem;
1143 wait_queue_head_t wait;
1146 #define BTRFS_BLOCK_RSV_GLOBAL 1
1147 #define BTRFS_BLOCK_RSV_DELALLOC 2
1148 #define BTRFS_BLOCK_RSV_TRANS 3
1149 #define BTRFS_BLOCK_RSV_CHUNK 4
1150 #define BTRFS_BLOCK_RSV_DELOPS 5
1151 #define BTRFS_BLOCK_RSV_EMPTY 6
1152 #define BTRFS_BLOCK_RSV_TEMP 7
1154 struct btrfs_block_rsv {
1157 struct btrfs_space_info *space_info;
1159 unsigned short full;
1160 unsigned short type;
1161 unsigned short failfast;
1165 * free clusters are used to claim free space in relatively large chunks,
1166 * allowing us to do less seeky writes. They are used for all metadata
1167 * allocations and data allocations in ssd mode.
1169 struct btrfs_free_cluster {
1171 spinlock_t refill_lock;
1172 struct rb_root root;
1174 /* largest extent in this cluster */
1177 /* first extent starting offset */
1180 struct btrfs_block_group_cache *block_group;
1182 * when a cluster is allocated from a block group, we put the
1183 * cluster onto a list in the block group so that it can
1184 * be freed before the block group is freed.
1186 struct list_head block_group_list;
1189 enum btrfs_caching_type {
1191 BTRFS_CACHE_STARTED = 1,
1192 BTRFS_CACHE_FAST = 2,
1193 BTRFS_CACHE_FINISHED = 3,
1194 BTRFS_CACHE_ERROR = 4,
1197 enum btrfs_disk_cache_state {
1198 BTRFS_DC_WRITTEN = 0,
1202 BTRFS_DC_NEED_WRITE = 4,
1205 struct btrfs_caching_control {
1206 struct list_head list;
1208 wait_queue_head_t wait;
1209 struct btrfs_work work;
1210 struct btrfs_block_group_cache *block_group;
1215 struct btrfs_block_group_cache {
1216 struct btrfs_key key;
1217 struct btrfs_block_group_item item;
1218 struct btrfs_fs_info *fs_info;
1219 struct inode *inode;
1226 u64 cache_generation;
1228 /* for raid56, this is a full stripe, without parity */
1229 unsigned long full_stripe_len;
1232 unsigned int dirty:1;
1233 unsigned int iref:1;
1235 int disk_cache_state;
1237 /* cache tracking stuff */
1239 struct btrfs_caching_control *caching_ctl;
1240 u64 last_byte_to_unpin;
1242 struct btrfs_space_info *space_info;
1244 /* free space cache stuff */
1245 struct btrfs_free_space_ctl *free_space_ctl;
1247 /* block group cache stuff */
1248 struct rb_node cache_node;
1250 /* for block groups in the same raid type */
1251 struct list_head list;
1256 /* List of struct btrfs_free_clusters for this block group.
1257 * Today it will only have one thing on it, but that may change
1259 struct list_head cluster_list;
1261 /* For delayed block group creation */
1262 struct list_head new_bg_list;
1265 /* delayed seq elem */
1267 struct list_head list;
1271 enum btrfs_orphan_cleanup_state {
1272 ORPHAN_CLEANUP_STARTED = 1,
1273 ORPHAN_CLEANUP_DONE = 2,
1276 /* used by the raid56 code to lock stripes for read/modify/write */
1277 struct btrfs_stripe_hash {
1278 struct list_head hash_list;
1279 wait_queue_head_t wait;
1283 /* used by the raid56 code to lock stripes for read/modify/write */
1284 struct btrfs_stripe_hash_table {
1285 struct list_head stripe_cache;
1286 spinlock_t cache_lock;
1288 struct btrfs_stripe_hash table[];
1291 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1294 struct reloc_control;
1295 struct btrfs_device;
1296 struct btrfs_fs_devices;
1297 struct btrfs_balance_control;
1298 struct btrfs_delayed_root;
1299 struct btrfs_fs_info {
1300 u8 fsid[BTRFS_FSID_SIZE];
1301 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1302 struct btrfs_root *extent_root;
1303 struct btrfs_root *tree_root;
1304 struct btrfs_root *chunk_root;
1305 struct btrfs_root *dev_root;
1306 struct btrfs_root *fs_root;
1307 struct btrfs_root *csum_root;
1308 struct btrfs_root *quota_root;
1310 /* the log root tree is a directory of all the other log roots */
1311 struct btrfs_root *log_root_tree;
1313 spinlock_t fs_roots_radix_lock;
1314 struct radix_tree_root fs_roots_radix;
1316 /* block group cache stuff */
1317 spinlock_t block_group_cache_lock;
1318 u64 first_logical_byte;
1319 struct rb_root block_group_cache_tree;
1321 /* keep track of unallocated space */
1322 spinlock_t free_chunk_lock;
1323 u64 free_chunk_space;
1325 struct extent_io_tree freed_extents[2];
1326 struct extent_io_tree *pinned_extents;
1328 /* logical->physical extent mapping */
1329 struct btrfs_mapping_tree mapping_tree;
1332 * block reservation for extent, checksum, root tree and
1333 * delayed dir index item
1335 struct btrfs_block_rsv global_block_rsv;
1336 /* block reservation for delay allocation */
1337 struct btrfs_block_rsv delalloc_block_rsv;
1338 /* block reservation for metadata operations */
1339 struct btrfs_block_rsv trans_block_rsv;
1340 /* block reservation for chunk tree */
1341 struct btrfs_block_rsv chunk_block_rsv;
1342 /* block reservation for delayed operations */
1343 struct btrfs_block_rsv delayed_block_rsv;
1345 struct btrfs_block_rsv empty_block_rsv;
1348 u64 last_trans_committed;
1351 * this is updated to the current trans every time a full commit
1352 * is required instead of the faster short fsync log commits
1354 u64 last_trans_log_full_commit;
1355 unsigned long mount_opt;
1356 unsigned long compress_type:4;
1357 int commit_interval;
1359 * It is a suggestive number, the read side is safe even it gets a
1360 * wrong number because we will write out the data into a regular
1361 * extent. The write side(mount/remount) is under ->s_umount lock,
1362 * so it is also safe.
1366 * Protected by ->chunk_mutex and sb->s_umount.
1368 * The reason that we use two lock to protect it is because only
1369 * remount and mount operations can change it and these two operations
1370 * are under sb->s_umount, but the read side (chunk allocation) can not
1371 * acquire sb->s_umount or the deadlock would happen. So we use two
1372 * locks to protect it. On the write side, we must acquire two locks,
1373 * and on the read side, we just need acquire one of them.
1376 struct btrfs_transaction *running_transaction;
1377 wait_queue_head_t transaction_throttle;
1378 wait_queue_head_t transaction_wait;
1379 wait_queue_head_t transaction_blocked_wait;
1380 wait_queue_head_t async_submit_wait;
1383 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1384 * when they are updated.
1386 * Because we do not clear the flags for ever, so we needn't use
1387 * the lock on the read side.
1389 * We also needn't use the lock when we mount the fs, because
1390 * there is no other task which will update the flag.
1392 spinlock_t super_lock;
1393 struct btrfs_super_block *super_copy;
1394 struct btrfs_super_block *super_for_commit;
1395 struct block_device *__bdev;
1396 struct super_block *sb;
1397 struct inode *btree_inode;
1398 struct backing_dev_info bdi;
1399 struct mutex tree_log_mutex;
1400 struct mutex transaction_kthread_mutex;
1401 struct mutex cleaner_mutex;
1402 struct mutex chunk_mutex;
1403 struct mutex volume_mutex;
1405 /* this is used during read/modify/write to make sure
1406 * no two ios are trying to mod the same stripe at the same
1409 struct btrfs_stripe_hash_table *stripe_hash_table;
1412 * this protects the ordered operations list only while we are
1413 * processing all of the entries on it. This way we make
1414 * sure the commit code doesn't find the list temporarily empty
1415 * because another function happens to be doing non-waiting preflush
1416 * before jumping into the main commit.
1418 struct mutex ordered_operations_mutex;
1421 * Same as ordered_operations_mutex except this is for ordered extents
1422 * and not the operations.
1424 struct mutex ordered_extent_flush_mutex;
1426 struct rw_semaphore extent_commit_sem;
1428 struct rw_semaphore cleanup_work_sem;
1430 struct rw_semaphore subvol_sem;
1431 struct srcu_struct subvol_srcu;
1433 spinlock_t trans_lock;
1435 * the reloc mutex goes with the trans lock, it is taken
1436 * during commit to protect us from the relocation code
1438 struct mutex reloc_mutex;
1440 struct list_head trans_list;
1441 struct list_head dead_roots;
1442 struct list_head caching_block_groups;
1444 spinlock_t delayed_iput_lock;
1445 struct list_head delayed_iputs;
1447 /* this protects tree_mod_seq_list */
1448 spinlock_t tree_mod_seq_lock;
1449 atomic64_t tree_mod_seq;
1450 struct list_head tree_mod_seq_list;
1451 struct seq_list tree_mod_seq_elem;
1453 /* this protects tree_mod_log */
1454 rwlock_t tree_mod_log_lock;
1455 struct rb_root tree_mod_log;
1457 atomic_t nr_async_submits;
1458 atomic_t async_submit_draining;
1459 atomic_t nr_async_bios;
1460 atomic_t async_delalloc_pages;
1461 atomic_t open_ioctl_trans;
1464 * this is used to protect the following list -- ordered_roots.
1466 spinlock_t ordered_root_lock;
1469 * all fs/file tree roots in which there are data=ordered extents
1470 * pending writeback are added into this list.
1472 * these can span multiple transactions and basically include
1473 * every dirty data page that isn't from nodatacow
1475 struct list_head ordered_roots;
1477 spinlock_t delalloc_root_lock;
1478 /* all fs/file tree roots that have delalloc inodes. */
1479 struct list_head delalloc_roots;
1482 * there is a pool of worker threads for checksumming during writes
1483 * and a pool for checksumming after reads. This is because readers
1484 * can run with FS locks held, and the writers may be waiting for
1485 * those locks. We don't want ordering in the pending list to cause
1486 * deadlocks, and so the two are serviced separately.
1488 * A third pool does submit_bio to avoid deadlocking with the other
1491 struct btrfs_workers generic_worker;
1492 struct btrfs_workers workers;
1493 struct btrfs_workers delalloc_workers;
1494 struct btrfs_workers flush_workers;
1495 struct btrfs_workers endio_workers;
1496 struct btrfs_workers endio_meta_workers;
1497 struct btrfs_workers endio_raid56_workers;
1498 struct btrfs_workers rmw_workers;
1499 struct btrfs_workers endio_meta_write_workers;
1500 struct btrfs_workers endio_write_workers;
1501 struct btrfs_workers endio_freespace_worker;
1502 struct btrfs_workers submit_workers;
1503 struct btrfs_workers caching_workers;
1504 struct btrfs_workers readahead_workers;
1507 * fixup workers take dirty pages that didn't properly go through
1508 * the cow mechanism and make them safe to write. It happens
1509 * for the sys_munmap function call path
1511 struct btrfs_workers fixup_workers;
1512 struct btrfs_workers delayed_workers;
1513 struct task_struct *transaction_kthread;
1514 struct task_struct *cleaner_kthread;
1515 int thread_pool_size;
1517 struct kobject super_kobj;
1518 struct completion kobj_unregister;
1521 int log_root_recovering;
1525 /* used to keep from writing metadata until there is a nice batch */
1526 struct percpu_counter dirty_metadata_bytes;
1527 struct percpu_counter delalloc_bytes;
1528 s32 dirty_metadata_batch;
1531 struct list_head dirty_cowonly_roots;
1533 struct btrfs_fs_devices *fs_devices;
1536 * the space_info list is almost entirely read only. It only changes
1537 * when we add a new raid type to the FS, and that happens
1538 * very rarely. RCU is used to protect it.
1540 struct list_head space_info;
1542 struct btrfs_space_info *data_sinfo;
1544 struct reloc_control *reloc_ctl;
1546 /* data_alloc_cluster is only used in ssd mode */
1547 struct btrfs_free_cluster data_alloc_cluster;
1549 /* all metadata allocations go through this cluster */
1550 struct btrfs_free_cluster meta_alloc_cluster;
1552 /* auto defrag inodes go here */
1553 spinlock_t defrag_inodes_lock;
1554 struct rb_root defrag_inodes;
1555 atomic_t defrag_running;
1557 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1558 seqlock_t profiles_lock;
1560 * these three are in extended format (availability of single
1561 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1562 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1564 u64 avail_data_alloc_bits;
1565 u64 avail_metadata_alloc_bits;
1566 u64 avail_system_alloc_bits;
1568 /* restriper state */
1569 spinlock_t balance_lock;
1570 struct mutex balance_mutex;
1571 atomic_t balance_running;
1572 atomic_t balance_pause_req;
1573 atomic_t balance_cancel_req;
1574 struct btrfs_balance_control *balance_ctl;
1575 wait_queue_head_t balance_wait_q;
1577 unsigned data_chunk_allocations;
1578 unsigned metadata_ratio;
1582 /* private scrub information */
1583 struct mutex scrub_lock;
1584 atomic_t scrubs_running;
1585 atomic_t scrub_pause_req;
1586 atomic_t scrubs_paused;
1587 atomic_t scrub_cancel_req;
1588 wait_queue_head_t scrub_pause_wait;
1589 struct rw_semaphore scrub_super_lock;
1590 int scrub_workers_refcnt;
1591 struct btrfs_workers scrub_workers;
1592 struct btrfs_workers scrub_wr_completion_workers;
1593 struct btrfs_workers scrub_nocow_workers;
1595 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1596 u32 check_integrity_print_mask;
1601 unsigned int quota_enabled:1;
1604 * quota_enabled only changes state after a commit. This holds the
1607 unsigned int pending_quota_state:1;
1609 /* is qgroup tracking in a consistent state? */
1612 /* holds configuration and tracking. Protected by qgroup_lock */
1613 struct rb_root qgroup_tree;
1614 spinlock_t qgroup_lock;
1617 * used to avoid frequently calling ulist_alloc()/ulist_free()
1618 * when doing qgroup accounting, it must be protected by qgroup_lock.
1620 struct ulist *qgroup_ulist;
1622 /* protect user change for quota operations */
1623 struct mutex qgroup_ioctl_lock;
1625 /* list of dirty qgroups to be written at next commit */
1626 struct list_head dirty_qgroups;
1628 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1631 /* qgroup rescan items */
1632 struct mutex qgroup_rescan_lock; /* protects the progress item */
1633 struct btrfs_key qgroup_rescan_progress;
1634 struct btrfs_workers qgroup_rescan_workers;
1635 struct completion qgroup_rescan_completion;
1636 struct btrfs_work qgroup_rescan_work;
1638 /* filesystem state */
1639 unsigned long fs_state;
1641 struct btrfs_delayed_root *delayed_root;
1643 /* readahead tree */
1644 spinlock_t reada_lock;
1645 struct radix_tree_root reada_tree;
1647 /* next backup root to be overwritten */
1648 int backup_root_index;
1650 int num_tolerated_disk_barrier_failures;
1652 /* device replace state */
1653 struct btrfs_dev_replace dev_replace;
1655 atomic_t mutually_exclusive_operation_running;
1659 * in ram representation of the tree. extent_root is used for all allocations
1660 * and for the extent tree extent_root root.
1663 struct extent_buffer *node;
1665 struct extent_buffer *commit_root;
1666 struct btrfs_root *log_root;
1667 struct btrfs_root *reloc_root;
1669 struct btrfs_root_item root_item;
1670 struct btrfs_key root_key;
1671 struct btrfs_fs_info *fs_info;
1672 struct extent_io_tree dirty_log_pages;
1674 struct kobject root_kobj;
1675 struct completion kobj_unregister;
1676 struct mutex objectid_mutex;
1678 spinlock_t accounting_lock;
1679 struct btrfs_block_rsv *block_rsv;
1681 /* free ino cache stuff */
1682 struct mutex fs_commit_mutex;
1683 struct btrfs_free_space_ctl *free_ino_ctl;
1684 enum btrfs_caching_type cached;
1685 spinlock_t cache_lock;
1686 wait_queue_head_t cache_wait;
1687 struct btrfs_free_space_ctl *free_ino_pinned;
1689 struct inode *cache_inode;
1691 struct mutex log_mutex;
1692 wait_queue_head_t log_writer_wait;
1693 wait_queue_head_t log_commit_wait[2];
1694 atomic_t log_writers;
1695 atomic_t log_commit[2];
1697 unsigned long log_transid;
1698 unsigned long last_log_commit;
1699 pid_t log_start_pid;
1700 bool log_multiple_pids;
1705 /* data allocations are done in sectorsize units */
1708 /* node allocations are done in nodesize units */
1711 /* leaf allocations are done in leafsize units */
1718 u64 highest_objectid;
1720 /* btrfs_record_root_in_trans is a multi-step process,
1721 * and it can race with the balancing code. But the
1722 * race is very small, and only the first time the root
1723 * is added to each transaction. So in_trans_setup
1724 * is used to tell us when more checks are required
1726 unsigned long in_trans_setup;
1731 u64 defrag_trans_start;
1732 struct btrfs_key defrag_progress;
1733 struct btrfs_key defrag_max;
1737 /* the dirty list is only used by non-reference counted roots */
1738 struct list_head dirty_list;
1740 struct list_head root_list;
1742 spinlock_t log_extents_lock[2];
1743 struct list_head logged_list[2];
1745 spinlock_t orphan_lock;
1746 atomic_t orphan_inodes;
1747 struct btrfs_block_rsv *orphan_block_rsv;
1748 int orphan_item_inserted;
1749 int orphan_cleanup_state;
1751 spinlock_t inode_lock;
1752 /* red-black tree that keeps track of in-memory inodes */
1753 struct rb_root inode_tree;
1756 * radix tree that keeps track of delayed nodes of every inode,
1757 * protected by inode_lock
1759 struct radix_tree_root delayed_nodes_tree;
1761 * right now this just gets used so that a root has its own devid
1762 * for stat. It may be used for more later
1768 spinlock_t root_item_lock;
1771 spinlock_t delalloc_lock;
1773 * all of the inodes that have delalloc bytes. It is possible for
1774 * this list to be empty even when there is still dirty data=ordered
1775 * extents waiting to finish IO.
1777 struct list_head delalloc_inodes;
1778 struct list_head delalloc_root;
1779 u64 nr_delalloc_inodes;
1781 * this is used by the balancing code to wait for all the pending
1784 spinlock_t ordered_extent_lock;
1787 * all of the data=ordered extents pending writeback
1788 * these can span multiple transactions and basically include
1789 * every dirty data page that isn't from nodatacow
1791 struct list_head ordered_extents;
1792 struct list_head ordered_root;
1793 u64 nr_ordered_extents;
1796 struct btrfs_ioctl_defrag_range_args {
1797 /* start of the defrag operation */
1800 /* number of bytes to defrag, use (u64)-1 to say all */
1804 * flags for the operation, which can include turning
1805 * on compression for this one defrag
1810 * any extent bigger than this will be considered
1811 * already defragged. Use 0 to take the kernel default
1812 * Use 1 to say every single extent must be rewritten
1814 __u32 extent_thresh;
1817 * which compression method to use if turning on compression
1818 * for this defrag operation. If unspecified, zlib will
1821 __u32 compress_type;
1823 /* spare for later */
1829 * inode items have the data typically returned from stat and store other
1830 * info about object characteristics. There is one for every file and dir in
1833 #define BTRFS_INODE_ITEM_KEY 1
1834 #define BTRFS_INODE_REF_KEY 12
1835 #define BTRFS_INODE_EXTREF_KEY 13
1836 #define BTRFS_XATTR_ITEM_KEY 24
1837 #define BTRFS_ORPHAN_ITEM_KEY 48
1838 /* reserve 2-15 close to the inode for later flexibility */
1841 * dir items are the name -> inode pointers in a directory. There is one
1842 * for every name in a directory.
1844 #define BTRFS_DIR_LOG_ITEM_KEY 60
1845 #define BTRFS_DIR_LOG_INDEX_KEY 72
1846 #define BTRFS_DIR_ITEM_KEY 84
1847 #define BTRFS_DIR_INDEX_KEY 96
1849 * extent data is for file data
1851 #define BTRFS_EXTENT_DATA_KEY 108
1854 * extent csums are stored in a separate tree and hold csums for
1855 * an entire extent on disk.
1857 #define BTRFS_EXTENT_CSUM_KEY 128
1860 * root items point to tree roots. They are typically in the root
1861 * tree used by the super block to find all the other trees
1863 #define BTRFS_ROOT_ITEM_KEY 132
1866 * root backrefs tie subvols and snapshots to the directory entries that
1869 #define BTRFS_ROOT_BACKREF_KEY 144
1872 * root refs make a fast index for listing all of the snapshots and
1873 * subvolumes referenced by a given root. They point directly to the
1874 * directory item in the root that references the subvol
1876 #define BTRFS_ROOT_REF_KEY 156
1879 * extent items are in the extent map tree. These record which blocks
1880 * are used, and how many references there are to each block
1882 #define BTRFS_EXTENT_ITEM_KEY 168
1885 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1886 * the length, so we save the level in key->offset instead of the length.
1888 #define BTRFS_METADATA_ITEM_KEY 169
1890 #define BTRFS_TREE_BLOCK_REF_KEY 176
1892 #define BTRFS_EXTENT_DATA_REF_KEY 178
1894 #define BTRFS_EXTENT_REF_V0_KEY 180
1896 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1898 #define BTRFS_SHARED_DATA_REF_KEY 184
1901 * block groups give us hints into the extent allocation trees. Which
1902 * blocks are free etc etc
1904 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1906 #define BTRFS_DEV_EXTENT_KEY 204
1907 #define BTRFS_DEV_ITEM_KEY 216
1908 #define BTRFS_CHUNK_ITEM_KEY 228
1911 * Records the overall state of the qgroups.
1912 * There's only one instance of this key present,
1913 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1915 #define BTRFS_QGROUP_STATUS_KEY 240
1917 * Records the currently used space of the qgroup.
1918 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1920 #define BTRFS_QGROUP_INFO_KEY 242
1922 * Contains the user configured limits for the qgroup.
1923 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1925 #define BTRFS_QGROUP_LIMIT_KEY 244
1927 * Records the child-parent relationship of qgroups. For
1928 * each relation, 2 keys are present:
1929 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1930 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1932 #define BTRFS_QGROUP_RELATION_KEY 246
1934 #define BTRFS_BALANCE_ITEM_KEY 248
1937 * Persistantly stores the io stats in the device tree.
1938 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1940 #define BTRFS_DEV_STATS_KEY 249
1943 * Persistantly stores the device replace state in the device tree.
1944 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1946 #define BTRFS_DEV_REPLACE_KEY 250
1949 * Stores items that allow to quickly map UUIDs to something else.
1950 * These items are part of the filesystem UUID tree.
1951 * The key is built like this:
1952 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1954 #if BTRFS_UUID_SIZE != 16
1955 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1957 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1958 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1959 * received subvols */
1962 * string items are for debugging. They just store a short string of
1965 #define BTRFS_STRING_ITEM_KEY 253
1968 * Flags for mount options.
1970 * Note: don't forget to add new options to btrfs_show_options()
1972 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1973 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1974 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1975 #define BTRFS_MOUNT_SSD (1 << 3)
1976 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1977 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1978 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1979 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1980 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1981 #define BTRFS_MOUNT_NOSSD (1 << 9)
1982 #define BTRFS_MOUNT_DISCARD (1 << 10)
1983 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1984 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1985 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1986 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1987 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1988 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1989 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1990 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1991 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1992 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1993 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1994 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1996 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1998 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1999 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2000 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2001 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2006 #define BTRFS_INODE_NODATASUM (1 << 0)
2007 #define BTRFS_INODE_NODATACOW (1 << 1)
2008 #define BTRFS_INODE_READONLY (1 << 2)
2009 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2010 #define BTRFS_INODE_PREALLOC (1 << 4)
2011 #define BTRFS_INODE_SYNC (1 << 5)
2012 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2013 #define BTRFS_INODE_APPEND (1 << 7)
2014 #define BTRFS_INODE_NODUMP (1 << 8)
2015 #define BTRFS_INODE_NOATIME (1 << 9)
2016 #define BTRFS_INODE_DIRSYNC (1 << 10)
2017 #define BTRFS_INODE_COMPRESS (1 << 11)
2019 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2021 struct btrfs_map_token {
2022 struct extent_buffer *eb;
2024 unsigned long offset;
2027 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2029 token->kaddr = NULL;
2032 /* some macros to generate set/get funcs for the struct fields. This
2033 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2036 #define le8_to_cpu(v) (v)
2037 #define cpu_to_le8(v) (v)
2040 #define read_eb_member(eb, ptr, type, member, result) ( \
2041 read_extent_buffer(eb, (char *)(result), \
2042 ((unsigned long)(ptr)) + \
2043 offsetof(type, member), \
2044 sizeof(((type *)0)->member)))
2046 #define write_eb_member(eb, ptr, type, member, result) ( \
2047 write_extent_buffer(eb, (char *)(result), \
2048 ((unsigned long)(ptr)) + \
2049 offsetof(type, member), \
2050 sizeof(((type *)0)->member)))
2052 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2053 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2054 unsigned long off, \
2055 struct btrfs_map_token *token); \
2056 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2057 unsigned long off, u##bits val, \
2058 struct btrfs_map_token *token); \
2059 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2060 unsigned long off) \
2062 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2064 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2065 unsigned long off, u##bits val) \
2067 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2070 DECLARE_BTRFS_SETGET_BITS(8)
2071 DECLARE_BTRFS_SETGET_BITS(16)
2072 DECLARE_BTRFS_SETGET_BITS(32)
2073 DECLARE_BTRFS_SETGET_BITS(64)
2075 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2076 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2078 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2079 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2081 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2084 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2085 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2087 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2088 struct btrfs_map_token *token) \
2090 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2091 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2093 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2094 type *s, u##bits val, \
2095 struct btrfs_map_token *token) \
2097 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2098 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2101 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2102 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2104 type *p = page_address(eb->pages[0]); \
2105 u##bits res = le##bits##_to_cpu(p->member); \
2108 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2111 type *p = page_address(eb->pages[0]); \
2112 p->member = cpu_to_le##bits(val); \
2115 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2116 static inline u##bits btrfs_##name(type *s) \
2118 return le##bits##_to_cpu(s->member); \
2120 static inline void btrfs_set_##name(type *s, u##bits val) \
2122 s->member = cpu_to_le##bits(val); \
2125 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2126 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2127 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2128 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2129 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2130 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2132 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2133 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2134 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2135 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2136 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2137 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2139 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2140 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2142 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2144 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2146 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2148 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2150 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2151 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2153 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2155 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2157 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2160 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
2162 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
2165 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
2167 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
2170 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2171 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2172 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2173 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2174 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2175 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2176 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2177 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2178 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2179 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2180 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2182 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2184 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2187 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2188 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2191 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2193 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2195 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2197 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2198 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2200 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2202 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2203 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2205 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2208 unsigned long offset = (unsigned long)c;
2209 offset += offsetof(struct btrfs_chunk, stripe);
2210 offset += nr * sizeof(struct btrfs_stripe);
2211 return (struct btrfs_stripe *)offset;
2214 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2216 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2219 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2220 struct btrfs_chunk *c, int nr)
2222 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2225 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2226 struct btrfs_chunk *c, int nr)
2228 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2231 /* struct btrfs_block_group_item */
2232 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2234 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2236 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2237 struct btrfs_block_group_item, chunk_objectid, 64);
2239 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2240 struct btrfs_block_group_item, chunk_objectid, 64);
2241 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2242 struct btrfs_block_group_item, flags, 64);
2243 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2244 struct btrfs_block_group_item, flags, 64);
2246 /* struct btrfs_inode_ref */
2247 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2248 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2250 /* struct btrfs_inode_extref */
2251 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2252 parent_objectid, 64);
2253 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2255 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2257 /* struct btrfs_inode_item */
2258 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2259 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2260 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2261 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2262 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2263 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2264 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2265 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2266 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2267 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2268 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2269 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2270 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2272 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2274 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2276 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2277 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2279 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2281 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2282 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2283 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2284 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2285 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2286 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2288 static inline struct btrfs_timespec *
2289 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2291 unsigned long ptr = (unsigned long)inode_item;
2292 ptr += offsetof(struct btrfs_inode_item, atime);
2293 return (struct btrfs_timespec *)ptr;
2296 static inline struct btrfs_timespec *
2297 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2299 unsigned long ptr = (unsigned long)inode_item;
2300 ptr += offsetof(struct btrfs_inode_item, mtime);
2301 return (struct btrfs_timespec *)ptr;
2304 static inline struct btrfs_timespec *
2305 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2307 unsigned long ptr = (unsigned long)inode_item;
2308 ptr += offsetof(struct btrfs_inode_item, ctime);
2309 return (struct btrfs_timespec *)ptr;
2312 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2313 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2314 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2315 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2317 /* struct btrfs_dev_extent */
2318 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2320 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2321 chunk_objectid, 64);
2322 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2324 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2326 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2328 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2329 return (u8 *)((unsigned long)dev + ptr);
2332 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2333 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2335 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2337 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2340 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2342 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2343 struct btrfs_tree_block_info *item,
2344 struct btrfs_disk_key *key)
2346 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2349 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2350 struct btrfs_tree_block_info *item,
2351 struct btrfs_disk_key *key)
2353 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2356 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2358 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2360 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2362 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2365 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2368 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2370 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2373 static inline u32 btrfs_extent_inline_ref_size(int type)
2375 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2376 type == BTRFS_SHARED_BLOCK_REF_KEY)
2377 return sizeof(struct btrfs_extent_inline_ref);
2378 if (type == BTRFS_SHARED_DATA_REF_KEY)
2379 return sizeof(struct btrfs_shared_data_ref) +
2380 sizeof(struct btrfs_extent_inline_ref);
2381 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2382 return sizeof(struct btrfs_extent_data_ref) +
2383 offsetof(struct btrfs_extent_inline_ref, offset);
2388 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2389 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2391 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2392 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2394 /* struct btrfs_node */
2395 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2396 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2397 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2399 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2402 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2405 ptr = offsetof(struct btrfs_node, ptrs) +
2406 sizeof(struct btrfs_key_ptr) * nr;
2407 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2410 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2414 ptr = offsetof(struct btrfs_node, ptrs) +
2415 sizeof(struct btrfs_key_ptr) * nr;
2416 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2419 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2422 ptr = offsetof(struct btrfs_node, ptrs) +
2423 sizeof(struct btrfs_key_ptr) * nr;
2424 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2427 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2431 ptr = offsetof(struct btrfs_node, ptrs) +
2432 sizeof(struct btrfs_key_ptr) * nr;
2433 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2436 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2438 return offsetof(struct btrfs_node, ptrs) +
2439 sizeof(struct btrfs_key_ptr) * nr;
2442 void btrfs_node_key(struct extent_buffer *eb,
2443 struct btrfs_disk_key *disk_key, int nr);
2445 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2446 struct btrfs_disk_key *disk_key, int nr)
2449 ptr = btrfs_node_key_ptr_offset(nr);
2450 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2451 struct btrfs_key_ptr, key, disk_key);
2454 /* struct btrfs_item */
2455 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2456 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2457 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2458 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2460 static inline unsigned long btrfs_item_nr_offset(int nr)
2462 return offsetof(struct btrfs_leaf, items) +
2463 sizeof(struct btrfs_item) * nr;
2466 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2469 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2472 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2473 struct btrfs_item *item)
2475 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2478 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2480 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2483 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2485 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2488 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2490 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2493 static inline void btrfs_item_key(struct extent_buffer *eb,
2494 struct btrfs_disk_key *disk_key, int nr)
2496 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2497 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2500 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2501 struct btrfs_disk_key *disk_key, int nr)
2503 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2504 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2507 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2510 * struct btrfs_root_ref
2512 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2513 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2514 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2516 /* struct btrfs_dir_item */
2517 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2518 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2519 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2520 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2521 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2522 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2524 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2526 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2529 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2530 struct btrfs_dir_item *item,
2531 struct btrfs_disk_key *key)
2533 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2536 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2537 struct btrfs_dir_item *item,
2538 struct btrfs_disk_key *key)
2540 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2543 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2545 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2547 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2550 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2551 struct btrfs_free_space_header *h,
2552 struct btrfs_disk_key *key)
2554 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2557 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2558 struct btrfs_free_space_header *h,
2559 struct btrfs_disk_key *key)
2561 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2564 /* struct btrfs_disk_key */
2565 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2567 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2568 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2570 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2571 struct btrfs_disk_key *disk)
2573 cpu->offset = le64_to_cpu(disk->offset);
2574 cpu->type = disk->type;
2575 cpu->objectid = le64_to_cpu(disk->objectid);
2578 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2579 struct btrfs_key *cpu)
2581 disk->offset = cpu_to_le64(cpu->offset);
2582 disk->type = cpu->type;
2583 disk->objectid = cpu_to_le64(cpu->objectid);
2586 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2587 struct btrfs_key *key, int nr)
2589 struct btrfs_disk_key disk_key;
2590 btrfs_node_key(eb, &disk_key, nr);
2591 btrfs_disk_key_to_cpu(key, &disk_key);
2594 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2595 struct btrfs_key *key, int nr)
2597 struct btrfs_disk_key disk_key;
2598 btrfs_item_key(eb, &disk_key, nr);
2599 btrfs_disk_key_to_cpu(key, &disk_key);
2602 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2603 struct btrfs_dir_item *item,
2604 struct btrfs_key *key)
2606 struct btrfs_disk_key disk_key;
2607 btrfs_dir_item_key(eb, item, &disk_key);
2608 btrfs_disk_key_to_cpu(key, &disk_key);
2612 static inline u8 btrfs_key_type(struct btrfs_key *key)
2617 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2622 /* struct btrfs_header */
2623 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2624 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2626 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2627 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2628 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2629 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2630 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2632 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2633 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2635 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2637 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2639 return (btrfs_header_flags(eb) & flag) == flag;
2642 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2644 u64 flags = btrfs_header_flags(eb);
2645 btrfs_set_header_flags(eb, flags | flag);
2646 return (flags & flag) == flag;
2649 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2651 u64 flags = btrfs_header_flags(eb);
2652 btrfs_set_header_flags(eb, flags & ~flag);
2653 return (flags & flag) == flag;
2656 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2658 u64 flags = btrfs_header_flags(eb);
2659 return flags >> BTRFS_BACKREF_REV_SHIFT;
2662 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2665 u64 flags = btrfs_header_flags(eb);
2666 flags &= ~BTRFS_BACKREF_REV_MASK;
2667 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2668 btrfs_set_header_flags(eb, flags);
2671 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2673 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2677 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2679 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2683 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2685 return btrfs_header_level(eb) == 0;
2688 /* struct btrfs_root_item */
2689 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2691 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2692 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2693 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2695 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2697 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2698 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2699 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2700 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2701 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2702 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2703 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2704 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2706 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2708 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2710 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2712 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2714 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2717 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2719 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2722 /* struct btrfs_root_backup */
2723 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2725 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2727 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2728 tree_root_level, 8);
2730 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2732 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2733 chunk_root_gen, 64);
2734 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2735 chunk_root_level, 8);
2737 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2739 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2740 extent_root_gen, 64);
2741 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2742 extent_root_level, 8);
2744 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2746 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2748 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2751 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2753 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2755 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2758 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2760 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2762 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2763 csum_root_level, 8);
2764 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2766 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2768 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2771 /* struct btrfs_balance_item */
2772 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2774 static inline void btrfs_balance_data(struct extent_buffer *eb,
2775 struct btrfs_balance_item *bi,
2776 struct btrfs_disk_balance_args *ba)
2778 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2781 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2782 struct btrfs_balance_item *bi,
2783 struct btrfs_disk_balance_args *ba)
2785 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2788 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2789 struct btrfs_balance_item *bi,
2790 struct btrfs_disk_balance_args *ba)
2792 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2795 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2796 struct btrfs_balance_item *bi,
2797 struct btrfs_disk_balance_args *ba)
2799 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2802 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2803 struct btrfs_balance_item *bi,
2804 struct btrfs_disk_balance_args *ba)
2806 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2809 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2810 struct btrfs_balance_item *bi,
2811 struct btrfs_disk_balance_args *ba)
2813 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2817 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2818 struct btrfs_disk_balance_args *disk)
2820 memset(cpu, 0, sizeof(*cpu));
2822 cpu->profiles = le64_to_cpu(disk->profiles);
2823 cpu->usage = le64_to_cpu(disk->usage);
2824 cpu->devid = le64_to_cpu(disk->devid);
2825 cpu->pstart = le64_to_cpu(disk->pstart);
2826 cpu->pend = le64_to_cpu(disk->pend);
2827 cpu->vstart = le64_to_cpu(disk->vstart);
2828 cpu->vend = le64_to_cpu(disk->vend);
2829 cpu->target = le64_to_cpu(disk->target);
2830 cpu->flags = le64_to_cpu(disk->flags);
2834 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2835 struct btrfs_balance_args *cpu)
2837 memset(disk, 0, sizeof(*disk));
2839 disk->profiles = cpu_to_le64(cpu->profiles);
2840 disk->usage = cpu_to_le64(cpu->usage);
2841 disk->devid = cpu_to_le64(cpu->devid);
2842 disk->pstart = cpu_to_le64(cpu->pstart);
2843 disk->pend = cpu_to_le64(cpu->pend);
2844 disk->vstart = cpu_to_le64(cpu->vstart);
2845 disk->vend = cpu_to_le64(cpu->vend);
2846 disk->target = cpu_to_le64(cpu->target);
2847 disk->flags = cpu_to_le64(cpu->flags);
2850 /* struct btrfs_super_block */
2851 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2852 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2853 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2855 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2856 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2857 struct btrfs_super_block, sys_chunk_array_size, 32);
2858 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2859 struct btrfs_super_block, chunk_root_generation, 64);
2860 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2862 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2864 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2865 chunk_root_level, 8);
2866 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2868 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2869 log_root_transid, 64);
2870 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2872 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2874 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2876 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2878 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2880 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2882 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2884 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2885 root_dir_objectid, 64);
2886 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2888 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2890 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2891 compat_ro_flags, 64);
2892 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2893 incompat_flags, 64);
2894 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2896 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2897 cache_generation, 64);
2898 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2900 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2902 u16 t = btrfs_super_csum_type(s);
2904 * csum type is validated at mount time
2906 return btrfs_csum_sizes[t];
2909 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2911 return offsetof(struct btrfs_leaf, items);
2914 /* struct btrfs_file_extent_item */
2915 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2916 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2917 struct btrfs_file_extent_item, disk_bytenr, 64);
2918 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2919 struct btrfs_file_extent_item, offset, 64);
2920 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2921 struct btrfs_file_extent_item, generation, 64);
2922 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2923 struct btrfs_file_extent_item, num_bytes, 64);
2925 static inline unsigned long
2926 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2928 unsigned long offset = (unsigned long)e;
2929 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2933 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2935 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2938 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2940 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2942 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2943 disk_num_bytes, 64);
2944 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2946 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2948 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2950 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2952 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2954 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2955 other_encoding, 16);
2957 /* this returns the number of file bytes represented by the inline item.
2958 * If an item is compressed, this is the uncompressed size
2960 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2961 struct btrfs_file_extent_item *e)
2963 return btrfs_file_extent_ram_bytes(eb, e);
2967 * this returns the number of bytes used by the item on disk, minus the
2968 * size of any extent headers. If a file is compressed on disk, this is
2969 * the compressed size
2971 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2972 struct btrfs_item *e)
2974 unsigned long offset;
2975 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2976 return btrfs_item_size(eb, e) - offset;
2979 /* btrfs_dev_stats_item */
2980 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2981 struct btrfs_dev_stats_item *ptr,
2986 read_extent_buffer(eb, &val,
2987 offsetof(struct btrfs_dev_stats_item, values) +
2988 ((unsigned long)ptr) + (index * sizeof(u64)),
2993 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2994 struct btrfs_dev_stats_item *ptr,
2997 write_extent_buffer(eb, &val,
2998 offsetof(struct btrfs_dev_stats_item, values) +
2999 ((unsigned long)ptr) + (index * sizeof(u64)),
3003 /* btrfs_qgroup_status_item */
3004 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3006 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3008 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3010 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3013 /* btrfs_qgroup_info_item */
3014 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3016 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3017 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3019 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3020 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3023 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3024 struct btrfs_qgroup_info_item, generation, 64);
3025 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3027 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3028 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3029 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3031 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3032 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3034 /* btrfs_qgroup_limit_item */
3035 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3037 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3039 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3041 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3043 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3046 /* btrfs_dev_replace_item */
3047 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3048 struct btrfs_dev_replace_item, src_devid, 64);
3049 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3050 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3052 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3054 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3056 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3058 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3059 num_write_errors, 64);
3060 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3061 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3063 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3065 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3068 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3069 struct btrfs_dev_replace_item, src_devid, 64);
3070 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3071 struct btrfs_dev_replace_item,
3072 cont_reading_from_srcdev_mode, 64);
3073 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3074 struct btrfs_dev_replace_item, replace_state, 64);
3075 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3076 struct btrfs_dev_replace_item, time_started, 64);
3077 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3078 struct btrfs_dev_replace_item, time_stopped, 64);
3079 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3080 struct btrfs_dev_replace_item, num_write_errors, 64);
3081 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3082 struct btrfs_dev_replace_item,
3083 num_uncorrectable_read_errors, 64);
3084 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3085 struct btrfs_dev_replace_item, cursor_left, 64);
3086 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3087 struct btrfs_dev_replace_item, cursor_right, 64);
3089 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3091 return sb->s_fs_info;
3094 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3097 return root->leafsize;
3098 return root->nodesize;
3101 /* helper function to cast into the data area of the leaf. */
3102 #define btrfs_item_ptr(leaf, slot, type) \
3103 ((type *)(btrfs_leaf_data(leaf) + \
3104 btrfs_item_offset_nr(leaf, slot)))
3106 #define btrfs_item_ptr_offset(leaf, slot) \
3107 ((unsigned long)(btrfs_leaf_data(leaf) + \
3108 btrfs_item_offset_nr(leaf, slot)))
3110 static inline struct dentry *fdentry(struct file *file)
3112 return file->f_path.dentry;
3115 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3117 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3118 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3121 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3123 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3127 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3130 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3135 * Doing a truncate won't result in new nodes or leaves, just what we need for
3138 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3141 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3145 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3146 struct btrfs_root *root);
3147 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3148 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3149 struct btrfs_root *root, unsigned long count);
3150 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3151 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3152 struct btrfs_root *root, u64 bytenr,
3153 u64 offset, int metadata, u64 *refs, u64 *flags);
3154 int btrfs_pin_extent(struct btrfs_root *root,
3155 u64 bytenr, u64 num, int reserved);
3156 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3157 u64 bytenr, u64 num_bytes);
3158 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3159 struct extent_buffer *eb);
3160 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3161 struct btrfs_root *root,
3162 u64 objectid, u64 offset, u64 bytenr);
3163 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3164 struct btrfs_fs_info *info,
3166 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3167 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3168 struct btrfs_root *root, u32 blocksize,
3169 u64 parent, u64 root_objectid,
3170 struct btrfs_disk_key *key, int level,
3171 u64 hint, u64 empty_size);
3172 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3173 struct btrfs_root *root,
3174 struct extent_buffer *buf,
3175 u64 parent, int last_ref);
3176 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3177 struct btrfs_root *root,
3178 u64 root_objectid, u64 owner,
3179 u64 offset, struct btrfs_key *ins);
3180 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3181 struct btrfs_root *root,
3182 u64 root_objectid, u64 owner, u64 offset,
3183 struct btrfs_key *ins);
3184 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3185 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3186 struct btrfs_key *ins, int is_data);
3187 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3188 struct extent_buffer *buf, int full_backref, int for_cow);
3189 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3190 struct extent_buffer *buf, int full_backref, int for_cow);
3191 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3192 struct btrfs_root *root,
3193 u64 bytenr, u64 num_bytes, u64 flags,
3194 int level, int is_data);
3195 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3196 struct btrfs_root *root,
3197 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3198 u64 owner, u64 offset, int for_cow);
3200 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3201 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3202 u64 start, u64 len);
3203 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3204 struct btrfs_root *root);
3205 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3206 struct btrfs_root *root);
3207 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3208 struct btrfs_root *root,
3209 u64 bytenr, u64 num_bytes, u64 parent,
3210 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3212 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3213 struct btrfs_root *root);
3214 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3215 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3216 int btrfs_read_block_groups(struct btrfs_root *root);
3217 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3218 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3219 struct btrfs_root *root, u64 bytes_used,
3220 u64 type, u64 chunk_objectid, u64 chunk_offset,
3222 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3223 struct btrfs_root *root, u64 group_start);
3224 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root);
3226 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3227 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3229 enum btrfs_reserve_flush_enum {
3230 /* If we are in the transaction, we can't flush anything.*/
3231 BTRFS_RESERVE_NO_FLUSH,
3233 * Flushing delalloc may cause deadlock somewhere, in this
3234 * case, use FLUSH LIMIT
3236 BTRFS_RESERVE_FLUSH_LIMIT,
3237 BTRFS_RESERVE_FLUSH_ALL,
3240 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3241 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3242 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3243 struct btrfs_root *root);
3244 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3245 struct inode *inode);
3246 void btrfs_orphan_release_metadata(struct inode *inode);
3247 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3248 struct btrfs_block_rsv *rsv,
3250 u64 *qgroup_reserved, bool use_global_rsv);
3251 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3252 struct btrfs_block_rsv *rsv,
3253 u64 qgroup_reserved);
3254 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3255 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3256 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3257 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3258 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3259 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3260 unsigned short type);
3261 void btrfs_free_block_rsv(struct btrfs_root *root,
3262 struct btrfs_block_rsv *rsv);
3263 int btrfs_block_rsv_add(struct btrfs_root *root,
3264 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3265 enum btrfs_reserve_flush_enum flush);
3266 int btrfs_block_rsv_check(struct btrfs_root *root,
3267 struct btrfs_block_rsv *block_rsv, int min_factor);
3268 int btrfs_block_rsv_refill(struct btrfs_root *root,
3269 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3270 enum btrfs_reserve_flush_enum flush);
3271 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3272 struct btrfs_block_rsv *dst_rsv,
3274 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3275 struct btrfs_block_rsv *dest, u64 num_bytes,
3277 void btrfs_block_rsv_release(struct btrfs_root *root,
3278 struct btrfs_block_rsv *block_rsv,
3280 int btrfs_set_block_group_ro(struct btrfs_root *root,
3281 struct btrfs_block_group_cache *cache);
3282 void btrfs_set_block_group_rw(struct btrfs_root *root,
3283 struct btrfs_block_group_cache *cache);
3284 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3285 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3286 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3287 u64 start, u64 end);
3288 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3289 u64 num_bytes, u64 *actual_bytes);
3290 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3291 struct btrfs_root *root, u64 type);
3292 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3294 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3295 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3296 struct btrfs_fs_info *fs_info);
3297 int __get_raid_index(u64 flags);
3299 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3300 int level, int *slot);
3301 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3302 int btrfs_previous_item(struct btrfs_root *root,
3303 struct btrfs_path *path, u64 min_objectid,
3305 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3306 struct btrfs_key *new_key);
3307 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3308 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3309 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3310 struct btrfs_key *key, int lowest_level,
3312 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3313 struct btrfs_key *max_key,
3314 struct btrfs_path *path,
3316 enum btrfs_compare_tree_result {
3317 BTRFS_COMPARE_TREE_NEW,
3318 BTRFS_COMPARE_TREE_DELETED,
3319 BTRFS_COMPARE_TREE_CHANGED,
3320 BTRFS_COMPARE_TREE_SAME,
3322 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3323 struct btrfs_root *right_root,
3324 struct btrfs_path *left_path,
3325 struct btrfs_path *right_path,
3326 struct btrfs_key *key,
3327 enum btrfs_compare_tree_result result,
3329 int btrfs_compare_trees(struct btrfs_root *left_root,
3330 struct btrfs_root *right_root,
3331 btrfs_changed_cb_t cb, void *ctx);
3332 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3333 struct btrfs_root *root, struct extent_buffer *buf,
3334 struct extent_buffer *parent, int parent_slot,
3335 struct extent_buffer **cow_ret);
3336 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3337 struct btrfs_root *root,
3338 struct extent_buffer *buf,
3339 struct extent_buffer **cow_ret, u64 new_root_objectid);
3340 int btrfs_block_can_be_shared(struct btrfs_root *root,
3341 struct extent_buffer *buf);
3342 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3344 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3345 u32 new_size, int from_end);
3346 int btrfs_split_item(struct btrfs_trans_handle *trans,
3347 struct btrfs_root *root,
3348 struct btrfs_path *path,
3349 struct btrfs_key *new_key,
3350 unsigned long split_offset);
3351 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3352 struct btrfs_root *root,
3353 struct btrfs_path *path,
3354 struct btrfs_key *new_key);
3355 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3356 *root, struct btrfs_key *key, struct btrfs_path *p, int
3358 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3359 struct btrfs_path *p, u64 time_seq);
3360 int btrfs_search_slot_for_read(struct btrfs_root *root,
3361 struct btrfs_key *key, struct btrfs_path *p,
3362 int find_higher, int return_any);
3363 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3364 struct btrfs_root *root, struct extent_buffer *parent,
3365 int start_slot, u64 *last_ret,
3366 struct btrfs_key *progress);
3367 void btrfs_release_path(struct btrfs_path *p);
3368 struct btrfs_path *btrfs_alloc_path(void);
3369 void btrfs_free_path(struct btrfs_path *p);
3370 void btrfs_set_path_blocking(struct btrfs_path *p);
3371 void btrfs_clear_path_blocking(struct btrfs_path *p,
3372 struct extent_buffer *held, int held_rw);
3373 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3375 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3376 struct btrfs_path *path, int slot, int nr);
3377 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3378 struct btrfs_root *root,
3379 struct btrfs_path *path)
3381 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3384 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3385 struct btrfs_key *cpu_key, u32 *data_size,
3386 u32 total_data, u32 total_size, int nr);
3387 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3388 *root, struct btrfs_key *key, void *data, u32 data_size);
3389 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3390 struct btrfs_root *root,
3391 struct btrfs_path *path,
3392 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3394 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3395 struct btrfs_root *root,
3396 struct btrfs_path *path,
3397 struct btrfs_key *key,
3400 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3403 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3404 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3406 static inline int btrfs_next_old_item(struct btrfs_root *root,
3407 struct btrfs_path *p, u64 time_seq)
3410 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3411 return btrfs_next_old_leaf(root, p, time_seq);
3414 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3416 return btrfs_next_old_item(root, p, 0);
3418 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3419 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3420 struct btrfs_block_rsv *block_rsv,
3421 int update_ref, int for_reloc);
3422 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3423 struct btrfs_root *root,
3424 struct extent_buffer *node,
3425 struct extent_buffer *parent);
3426 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3429 * Get synced with close_ctree()
3432 return fs_info->closing;
3436 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3437 * anything except sleeping. This function is used to check the status of
3440 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3442 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3443 btrfs_fs_closing(root->fs_info));
3446 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3448 kfree(fs_info->balance_ctl);
3449 kfree(fs_info->delayed_root);
3450 kfree(fs_info->extent_root);
3451 kfree(fs_info->tree_root);
3452 kfree(fs_info->chunk_root);
3453 kfree(fs_info->dev_root);
3454 kfree(fs_info->csum_root);
3455 kfree(fs_info->quota_root);
3456 kfree(fs_info->super_copy);
3457 kfree(fs_info->super_for_commit);
3461 /* tree mod log functions from ctree.c */
3462 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3463 struct seq_list *elem);
3464 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3465 struct seq_list *elem);
3466 u64 btrfs_tree_mod_seq_prev(u64 seq);
3467 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3470 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3471 struct btrfs_path *path,
3472 u64 root_id, u64 ref_id);
3473 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3474 struct btrfs_root *tree_root,
3475 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3476 const char *name, int name_len);
3477 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3478 struct btrfs_root *tree_root,
3479 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3480 const char *name, int name_len);
3481 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3482 struct btrfs_key *key);
3483 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3484 *root, struct btrfs_key *key, struct btrfs_root_item
3486 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3487 struct btrfs_root *root,
3488 struct btrfs_key *key,
3489 struct btrfs_root_item *item);
3490 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3491 struct btrfs_path *path, struct btrfs_root_item *root_item,
3492 struct btrfs_key *root_key);
3493 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3494 void btrfs_set_root_node(struct btrfs_root_item *item,
3495 struct extent_buffer *node);
3496 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3497 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3498 struct btrfs_root *root);
3501 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3502 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3504 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3505 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3509 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3510 const char *name, int name_len);
3511 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3512 struct btrfs_root *root, const char *name,
3513 int name_len, struct inode *dir,
3514 struct btrfs_key *location, u8 type, u64 index);
3515 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3516 struct btrfs_root *root,
3517 struct btrfs_path *path, u64 dir,
3518 const char *name, int name_len,
3520 struct btrfs_dir_item *
3521 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3522 struct btrfs_root *root,
3523 struct btrfs_path *path, u64 dir,
3524 u64 objectid, const char *name, int name_len,
3526 struct btrfs_dir_item *
3527 btrfs_search_dir_index_item(struct btrfs_root *root,
3528 struct btrfs_path *path, u64 dirid,
3529 const char *name, int name_len);
3530 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3531 struct btrfs_root *root,
3532 struct btrfs_path *path,
3533 struct btrfs_dir_item *di);
3534 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3535 struct btrfs_root *root,
3536 struct btrfs_path *path, u64 objectid,
3537 const char *name, u16 name_len,
3538 const void *data, u16 data_len);
3539 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3540 struct btrfs_root *root,
3541 struct btrfs_path *path, u64 dir,
3542 const char *name, u16 name_len,
3544 int verify_dir_item(struct btrfs_root *root,
3545 struct extent_buffer *leaf,
3546 struct btrfs_dir_item *dir_item);
3549 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3550 struct btrfs_root *root, u64 offset);
3551 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3552 struct btrfs_root *root, u64 offset);
3553 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3556 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3557 struct btrfs_root *root,
3558 const char *name, int name_len,
3559 u64 inode_objectid, u64 ref_objectid, u64 index);
3560 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3561 struct btrfs_root *root,
3562 const char *name, int name_len,
3563 u64 inode_objectid, u64 ref_objectid, u64 *index);
3564 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3565 struct btrfs_root *root,
3566 struct btrfs_path *path,
3567 const char *name, int name_len,
3568 u64 inode_objectid, u64 ref_objectid, int mod,
3570 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3571 struct btrfs_root *root,
3572 struct btrfs_path *path, u64 objectid);
3573 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3574 *root, struct btrfs_path *path,
3575 struct btrfs_key *location, int mod);
3577 struct btrfs_inode_extref *
3578 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3579 struct btrfs_root *root,
3580 struct btrfs_path *path,
3581 const char *name, int name_len,
3582 u64 inode_objectid, u64 ref_objectid, int ins_len,
3585 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3586 u64 ref_objectid, const char *name,
3588 struct btrfs_inode_extref **extref_ret);
3591 struct btrfs_dio_private;
3592 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3593 struct btrfs_root *root, u64 bytenr, u64 len);
3594 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3595 struct bio *bio, u32 *dst);
3596 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3597 struct btrfs_dio_private *dip, struct bio *bio,
3598 u64 logical_offset);
3599 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3600 struct btrfs_root *root,
3601 u64 objectid, u64 pos,
3602 u64 disk_offset, u64 disk_num_bytes,
3603 u64 num_bytes, u64 offset, u64 ram_bytes,
3604 u8 compression, u8 encryption, u16 other_encoding);
3605 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3606 struct btrfs_root *root,
3607 struct btrfs_path *path, u64 objectid,
3608 u64 bytenr, int mod);
3609 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3610 struct btrfs_root *root,
3611 struct btrfs_ordered_sum *sums);
3612 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3613 struct bio *bio, u64 file_start, int contig);
3614 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root, struct btrfs_path *path,
3617 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3618 struct list_head *list, int search_commit);
3620 struct btrfs_delalloc_work {
3621 struct inode *inode;
3624 struct completion completion;
3625 struct list_head list;
3626 struct btrfs_work work;
3629 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3630 int wait, int delay_iput);
3631 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3633 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3634 size_t pg_offset, u64 start, u64 len,
3636 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3637 u64 *orig_start, u64 *orig_block_len,
3640 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3641 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3642 #define ClearPageChecked ClearPageFsMisc
3643 #define SetPageChecked SetPageFsMisc
3644 #define PageChecked PageFsMisc
3647 /* This forces readahead on a given range of bytes in an inode */
3648 static inline void btrfs_force_ra(struct address_space *mapping,
3649 struct file_ra_state *ra, struct file *file,
3650 pgoff_t offset, unsigned long req_size)
3652 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3655 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3656 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3657 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3658 struct btrfs_root *root,
3659 struct inode *dir, struct inode *inode,
3660 const char *name, int name_len);
3661 int btrfs_add_link(struct btrfs_trans_handle *trans,
3662 struct inode *parent_inode, struct inode *inode,
3663 const char *name, int name_len, int add_backref, u64 index);
3664 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3665 struct btrfs_root *root,
3666 struct inode *dir, u64 objectid,
3667 const char *name, int name_len);
3668 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3670 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3671 struct btrfs_root *root,
3672 struct inode *inode, u64 new_size,
3675 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3676 int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info *fs_info,
3678 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3679 struct extent_state **cached_state);
3680 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3681 struct btrfs_root *new_root, u64 new_dirid);
3682 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3683 size_t size, struct bio *bio,
3684 unsigned long bio_flags);
3685 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3686 int btrfs_readpage(struct file *file, struct page *page);
3687 void btrfs_evict_inode(struct inode *inode);
3688 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3689 struct inode *btrfs_alloc_inode(struct super_block *sb);
3690 void btrfs_destroy_inode(struct inode *inode);
3691 int btrfs_drop_inode(struct inode *inode);
3692 int btrfs_init_cachep(void);
3693 void btrfs_destroy_cachep(void);
3694 long btrfs_ioctl_trans_end(struct file *file);
3695 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3696 struct btrfs_root *root, int *was_new);
3697 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3698 size_t pg_offset, u64 start, u64 end,
3700 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3701 struct btrfs_root *root,
3702 struct inode *inode);
3703 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3704 struct btrfs_root *root, struct inode *inode);
3705 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3706 int btrfs_orphan_cleanup(struct btrfs_root *root);
3707 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3708 struct btrfs_root *root);
3709 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3710 void btrfs_invalidate_inodes(struct btrfs_root *root);
3711 void btrfs_add_delayed_iput(struct inode *inode);
3712 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3713 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3714 u64 start, u64 num_bytes, u64 min_size,
3715 loff_t actual_len, u64 *alloc_hint);
3716 int btrfs_prealloc_file_range_trans(struct inode *inode,
3717 struct btrfs_trans_handle *trans, int mode,
3718 u64 start, u64 num_bytes, u64 min_size,
3719 loff_t actual_len, u64 *alloc_hint);
3720 extern const struct dentry_operations btrfs_dentry_operations;
3723 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3724 void btrfs_update_iflags(struct inode *inode);
3725 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3726 int btrfs_defrag_file(struct inode *inode, struct file *file,
3727 struct btrfs_ioctl_defrag_range_args *range,
3728 u64 newer_than, unsigned long max_pages);
3729 void btrfs_get_block_group_info(struct list_head *groups_list,
3730 struct btrfs_ioctl_space_info *space);
3731 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3732 struct btrfs_ioctl_balance_args *bargs);
3736 int btrfs_auto_defrag_init(void);
3737 void btrfs_auto_defrag_exit(void);
3738 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3739 struct inode *inode);
3740 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3741 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3742 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3743 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3745 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3746 u64 start, u64 end, int skip_pinned,
3748 extern const struct file_operations btrfs_file_operations;
3749 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3750 struct btrfs_root *root, struct inode *inode,
3751 struct btrfs_path *path, u64 start, u64 end,
3752 u64 *drop_end, int drop_cache);
3753 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3754 struct btrfs_root *root, struct inode *inode, u64 start,
3755 u64 end, int drop_cache);
3756 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3757 struct inode *inode, u64 start, u64 end);
3758 int btrfs_release_file(struct inode *inode, struct file *file);
3759 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3760 struct page **pages, size_t num_pages,
3761 loff_t pos, size_t write_bytes,
3762 struct extent_state **cached);
3765 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3766 struct btrfs_root *root);
3769 int btrfs_init_sysfs(void);
3770 void btrfs_exit_sysfs(void);
3773 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3776 int btrfs_parse_options(struct btrfs_root *root, char *options);
3777 int btrfs_sync_fs(struct super_block *sb, int wait);
3779 #ifdef CONFIG_PRINTK
3781 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3783 static inline __printf(2, 3)
3784 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3789 #define btrfs_emerg(fs_info, fmt, args...) \
3790 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3791 #define btrfs_alert(fs_info, fmt, args...) \
3792 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3793 #define btrfs_crit(fs_info, fmt, args...) \
3794 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3795 #define btrfs_err(fs_info, fmt, args...) \
3796 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3797 #define btrfs_warn(fs_info, fmt, args...) \
3798 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3799 #define btrfs_notice(fs_info, fmt, args...) \
3800 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3801 #define btrfs_info(fs_info, fmt, args...) \
3802 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3803 #define btrfs_debug(fs_info, fmt, args...) \
3804 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3807 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3808 unsigned int line, int errno, const char *fmt, ...);
3811 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3812 struct btrfs_root *root, const char *function,
3813 unsigned int line, int errno);
3815 #define btrfs_set_fs_incompat(__fs_info, opt) \
3816 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3818 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3821 struct btrfs_super_block *disk_super;
3824 disk_super = fs_info->super_copy;
3825 features = btrfs_super_incompat_flags(disk_super);
3826 if (!(features & flag)) {
3827 spin_lock(&fs_info->super_lock);
3828 features = btrfs_super_incompat_flags(disk_super);
3829 if (!(features & flag)) {
3831 btrfs_set_super_incompat_flags(disk_super, features);
3832 printk(KERN_INFO "btrfs: setting %llu feature flag\n",
3835 spin_unlock(&fs_info->super_lock);
3839 #define btrfs_fs_incompat(fs_info, opt) \
3840 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3842 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3844 struct btrfs_super_block *disk_super;
3845 disk_super = fs_info->super_copy;
3846 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3850 * Call btrfs_abort_transaction as early as possible when an error condition is
3851 * detected, that way the exact line number is reported.
3854 #define btrfs_abort_transaction(trans, root, errno) \
3856 __btrfs_abort_transaction(trans, root, __func__, \
3860 #define btrfs_std_error(fs_info, errno) \
3863 __btrfs_std_error((fs_info), __func__, \
3864 __LINE__, (errno), NULL); \
3867 #define btrfs_error(fs_info, errno, fmt, args...) \
3869 __btrfs_std_error((fs_info), __func__, __LINE__, \
3870 (errno), fmt, ##args); \
3874 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3875 unsigned int line, int errno, const char *fmt, ...);
3878 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3879 * will panic(). Otherwise we BUG() here.
3881 #define btrfs_panic(fs_info, errno, fmt, args...) \
3883 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3888 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3889 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3890 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3891 struct inode *inode, struct inode *dir);
3892 int btrfs_acl_chmod(struct inode *inode);
3894 #define btrfs_get_acl NULL
3895 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3896 struct inode *inode, struct inode *dir)
3900 static inline int btrfs_acl_chmod(struct inode *inode)
3907 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3908 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3909 struct btrfs_root *root);
3910 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3911 struct btrfs_root *root);
3912 int btrfs_recover_relocation(struct btrfs_root *root);
3913 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3914 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3915 struct btrfs_root *root, struct extent_buffer *buf,
3916 struct extent_buffer *cow);
3917 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3918 struct btrfs_pending_snapshot *pending,
3919 u64 *bytes_to_reserve);
3920 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3921 struct btrfs_pending_snapshot *pending);
3924 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3925 u64 end, struct btrfs_scrub_progress *progress,
3926 int readonly, int is_dev_replace);
3927 void btrfs_scrub_pause(struct btrfs_root *root);
3928 void btrfs_scrub_pause_super(struct btrfs_root *root);
3929 void btrfs_scrub_continue(struct btrfs_root *root);
3930 void btrfs_scrub_continue_super(struct btrfs_root *root);
3931 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3932 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3933 struct btrfs_device *dev);
3934 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3935 struct btrfs_scrub_progress *progress);
3938 struct reada_control {
3939 struct btrfs_root *root; /* tree to prefetch */
3940 struct btrfs_key key_start;
3941 struct btrfs_key key_end; /* exclusive */
3944 wait_queue_head_t wait;
3946 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3947 struct btrfs_key *start, struct btrfs_key *end);
3948 int btrfs_reada_wait(void *handle);
3949 void btrfs_reada_detach(void *handle);
3950 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3951 u64 start, int err);
3954 struct qgroup_update {
3955 struct list_head list;
3956 struct btrfs_delayed_ref_node *node;
3957 struct btrfs_delayed_extent_op *extent_op;
3960 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3961 struct btrfs_fs_info *fs_info);
3962 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3963 struct btrfs_fs_info *fs_info);
3964 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
3965 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
3966 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
3967 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3968 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3969 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3970 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3971 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3972 struct btrfs_fs_info *fs_info, u64 qgroupid,
3974 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3975 struct btrfs_fs_info *fs_info, u64 qgroupid);
3976 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3977 struct btrfs_fs_info *fs_info, u64 qgroupid,
3978 struct btrfs_qgroup_limit *limit);
3979 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3980 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3981 struct btrfs_delayed_extent_op;
3982 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3983 struct btrfs_delayed_ref_node *node,
3984 struct btrfs_delayed_extent_op *extent_op);
3985 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3986 struct btrfs_fs_info *fs_info,
3987 struct btrfs_delayed_ref_node *node,
3988 struct btrfs_delayed_extent_op *extent_op);
3989 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3990 struct btrfs_fs_info *fs_info);
3991 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3992 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3993 struct btrfs_qgroup_inherit *inherit);
3994 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3995 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3997 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3999 static inline int is_fstree(u64 rootid)
4001 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4002 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4007 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4009 return signal_pending(current);