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/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle;
41 struct btrfs_transaction;
42 struct btrfs_pending_snapshot;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_transaction_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 struct btrfs_ordered_sum;
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 #define BTRFS_MAX_MIRRORS 3
54 #define BTRFS_MAX_LEVEL 8
56 #define BTRFS_COMPAT_EXTENT_TREE_V0
59 * files bigger than this get some pre-flushing when they are added
60 * to the ordered operations list. That way we limit the total
61 * work done by the commit
63 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
65 /* holds pointers to all of the tree roots */
66 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
68 /* stores information about which extents are in use, and reference counts */
69 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
72 * chunk tree stores translations from logical -> physical block numbering
73 * the super block points to the chunk tree
75 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
78 * stores information about which areas of a given device are in use.
79 * one per device. The tree of tree roots points to the device tree
81 #define BTRFS_DEV_TREE_OBJECTID 4ULL
83 /* one per subvolume, storing files and directories */
84 #define BTRFS_FS_TREE_OBJECTID 5ULL
86 /* directory objectid inside the root tree */
87 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
89 /* holds checksums of all the data extents */
90 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
92 /* holds quota configuration and tracking */
93 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
95 /* for storing items that use the BTRFS_UUID_KEY* types */
96 #define BTRFS_UUID_TREE_OBJECTID 9ULL
98 /* for storing balance parameters in the root tree */
99 #define BTRFS_BALANCE_OBJECTID -4ULL
101 /* orhpan objectid for tracking unlinked/truncated files */
102 #define BTRFS_ORPHAN_OBJECTID -5ULL
104 /* does write ahead logging to speed up fsyncs */
105 #define BTRFS_TREE_LOG_OBJECTID -6ULL
106 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
108 /* for space balancing */
109 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
110 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
113 * extent checksums all have this objectid
114 * this allows them to share the logging tree
117 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
119 /* For storing free space cache */
120 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
123 * The inode number assigned to the special inode for storing
126 #define BTRFS_FREE_INO_OBJECTID -12ULL
128 /* dummy objectid represents multiple objectids */
129 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
132 * All files have objectids in this range.
134 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
135 #define BTRFS_LAST_FREE_OBJECTID -256ULL
136 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
140 * the device items go into the chunk tree. The key is in the form
141 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
143 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
145 #define BTRFS_BTREE_INODE_OBJECTID 1
147 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
149 #define BTRFS_DEV_REPLACE_DEVID 0ULL
152 * the max metadata block size. This limit is somewhat artificial,
153 * but the memmove costs go through the roof for larger blocks.
155 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
158 * we can actually store much bigger names, but lets not confuse the rest
161 #define BTRFS_NAME_LEN 255
164 * Theoretical limit is larger, but we keep this down to a sane
165 * value. That should limit greatly the possibility of collisions on
168 #define BTRFS_LINK_MAX 65535U
170 /* 32 bytes in various csum fields */
171 #define BTRFS_CSUM_SIZE 32
174 #define BTRFS_CSUM_TYPE_CRC32 0
176 static int btrfs_csum_sizes[] = { 4, 0 };
178 /* four bytes for CRC32 */
179 #define BTRFS_EMPTY_DIR_SIZE 0
181 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
182 #define REQ_GET_READ_MIRRORS (1 << 30)
184 #define BTRFS_FT_UNKNOWN 0
185 #define BTRFS_FT_REG_FILE 1
186 #define BTRFS_FT_DIR 2
187 #define BTRFS_FT_CHRDEV 3
188 #define BTRFS_FT_BLKDEV 4
189 #define BTRFS_FT_FIFO 5
190 #define BTRFS_FT_SOCK 6
191 #define BTRFS_FT_SYMLINK 7
192 #define BTRFS_FT_XATTR 8
193 #define BTRFS_FT_MAX 9
195 /* ioprio of readahead is set to idle */
196 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
198 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
201 * The key defines the order in the tree, and so it also defines (optimal)
204 * objectid corresponds to the inode number.
206 * type tells us things about the object, and is a kind of stream selector.
207 * so for a given inode, keys with type of 1 might refer to the inode data,
208 * type of 2 may point to file data in the btree and type == 3 may point to
211 * offset is the starting byte offset for this key in the stream.
213 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
214 * in cpu native order. Otherwise they are identical and their sizes
215 * should be the same (ie both packed)
217 struct btrfs_disk_key {
221 } __attribute__ ((__packed__));
227 } __attribute__ ((__packed__));
229 struct btrfs_mapping_tree {
230 struct extent_map_tree map_tree;
233 struct btrfs_dev_item {
234 /* the internal btrfs device id */
237 /* size of the device */
243 /* optimal io alignment for this device */
246 /* optimal io width for this device */
249 /* minimal io size for this device */
252 /* type and info about this device */
255 /* expected generation for this device */
259 * starting byte of this partition on the device,
260 * to allow for stripe alignment in the future
264 /* grouping information for allocation decisions */
267 /* seek speed 0-100 where 100 is fastest */
270 /* bandwidth 0-100 where 100 is fastest */
273 /* btrfs generated uuid for this device */
274 u8 uuid[BTRFS_UUID_SIZE];
276 /* uuid of FS who owns this device */
277 u8 fsid[BTRFS_UUID_SIZE];
278 } __attribute__ ((__packed__));
280 struct btrfs_stripe {
283 u8 dev_uuid[BTRFS_UUID_SIZE];
284 } __attribute__ ((__packed__));
287 /* size of this chunk in bytes */
290 /* objectid of the root referencing this chunk */
296 /* optimal io alignment for this chunk */
299 /* optimal io width for this chunk */
302 /* minimal io size for this chunk */
305 /* 2^16 stripes is quite a lot, a second limit is the size of a single
310 /* sub stripes only matter for raid10 */
312 struct btrfs_stripe stripe;
313 /* additional stripes go here */
314 } __attribute__ ((__packed__));
316 #define BTRFS_FREE_SPACE_EXTENT 1
317 #define BTRFS_FREE_SPACE_BITMAP 2
319 struct btrfs_free_space_entry {
323 } __attribute__ ((__packed__));
325 struct btrfs_free_space_header {
326 struct btrfs_disk_key location;
330 } __attribute__ ((__packed__));
332 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
334 BUG_ON(num_stripes == 0);
335 return sizeof(struct btrfs_chunk) +
336 sizeof(struct btrfs_stripe) * (num_stripes - 1);
339 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
340 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
345 #define BTRFS_FS_STATE_ERROR 0
346 #define BTRFS_FS_STATE_REMOUNTING 1
347 #define BTRFS_FS_STATE_TRANS_ABORTED 2
349 /* Super block flags */
350 /* Errors detected */
351 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
353 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
354 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
356 #define BTRFS_BACKREF_REV_MAX 256
357 #define BTRFS_BACKREF_REV_SHIFT 56
358 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
359 BTRFS_BACKREF_REV_SHIFT)
361 #define BTRFS_OLD_BACKREF_REV 0
362 #define BTRFS_MIXED_BACKREF_REV 1
365 * every tree block (leaf or node) starts with this header.
367 struct btrfs_header {
368 /* these first four must match the super block */
369 u8 csum[BTRFS_CSUM_SIZE];
370 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
371 __le64 bytenr; /* which block this node is supposed to live in */
374 /* allowed to be different from the super from here on down */
375 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
380 } __attribute__ ((__packed__));
382 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
383 sizeof(struct btrfs_header)) / \
384 sizeof(struct btrfs_key_ptr))
385 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
386 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
387 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
388 sizeof(struct btrfs_item) - \
389 sizeof(struct btrfs_file_extent_item))
390 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
391 sizeof(struct btrfs_item) -\
392 sizeof(struct btrfs_dir_item))
396 * this is a very generous portion of the super block, giving us
397 * room to translate 14 chunks with 3 stripes each.
399 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
400 #define BTRFS_LABEL_SIZE 256
403 * just in case we somehow lose the roots and are not able to mount,
404 * we store an array of the roots from previous transactions
407 #define BTRFS_NUM_BACKUP_ROOTS 4
408 struct btrfs_root_backup {
410 __le64 tree_root_gen;
413 __le64 chunk_root_gen;
416 __le64 extent_root_gen;
425 __le64 csum_root_gen;
435 u8 extent_root_level;
439 /* future and to align */
441 } __attribute__ ((__packed__));
444 * the super block basically lists the main trees of the FS
445 * it currently lacks any block count etc etc
447 struct btrfs_super_block {
448 u8 csum[BTRFS_CSUM_SIZE];
449 /* the first 4 fields must match struct btrfs_header */
450 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
451 __le64 bytenr; /* this block number */
454 /* allowed to be different from the btrfs_header from here own down */
461 /* this will help find the new super based on the log root */
462 __le64 log_root_transid;
465 __le64 root_dir_objectid;
471 __le32 sys_chunk_array_size;
472 __le64 chunk_root_generation;
474 __le64 compat_ro_flags;
475 __le64 incompat_flags;
480 struct btrfs_dev_item dev_item;
482 char label[BTRFS_LABEL_SIZE];
484 __le64 cache_generation;
485 __le64 uuid_tree_generation;
487 /* future expansion */
489 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
490 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
491 } __attribute__ ((__packed__));
494 * Compat flags that we support. If any incompat flags are set other than the
495 * ones specified below then we will fail to mount
497 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
498 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
499 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
500 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
502 * some patches floated around with a second compression method
503 * lets save that incompat here for when they do get in
504 * Note we don't actually support it, we're just reserving the
507 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
510 * older kernels tried to do bigger metadata blocks, but the
511 * code was pretty buggy. Lets not let them try anymore.
513 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
515 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
516 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
517 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
519 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
520 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
521 #define BTRFS_FEATURE_INCOMPAT_SUPP \
522 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
523 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
524 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
525 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
526 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
527 BTRFS_FEATURE_INCOMPAT_RAID56 | \
528 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
529 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
532 * A leaf is full of items. offset and size tell us where to find
533 * the item in the leaf (relative to the start of the data area)
536 struct btrfs_disk_key key;
539 } __attribute__ ((__packed__));
542 * leaves have an item area and a data area:
543 * [item0, item1....itemN] [free space] [dataN...data1, data0]
545 * The data is separate from the items to get the keys closer together
549 struct btrfs_header header;
550 struct btrfs_item items[];
551 } __attribute__ ((__packed__));
554 * all non-leaf blocks are nodes, they hold only keys and pointers to
557 struct btrfs_key_ptr {
558 struct btrfs_disk_key key;
561 } __attribute__ ((__packed__));
564 struct btrfs_header header;
565 struct btrfs_key_ptr ptrs[];
566 } __attribute__ ((__packed__));
569 * btrfs_paths remember the path taken from the root down to the leaf.
570 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
571 * to any other levels that are present.
573 * The slots array records the index of the item or block pointer
574 * used while walking the tree.
577 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
578 int slots[BTRFS_MAX_LEVEL];
579 /* if there is real range locking, this locks field will change */
580 int locks[BTRFS_MAX_LEVEL];
582 /* keep some upper locks as we walk down */
586 * set by btrfs_split_item, tells search_slot to keep all locks
587 * and to force calls to keep space in the nodes
589 unsigned int search_for_split:1;
590 unsigned int keep_locks:1;
591 unsigned int skip_locking:1;
592 unsigned int leave_spinning:1;
593 unsigned int search_commit_root:1;
597 * items in the extent btree are used to record the objectid of the
598 * owner of the block and the number of references
601 struct btrfs_extent_item {
605 } __attribute__ ((__packed__));
607 struct btrfs_extent_item_v0 {
609 } __attribute__ ((__packed__));
611 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
612 sizeof(struct btrfs_item))
614 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
615 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
617 /* following flags only apply to tree blocks */
619 /* use full backrefs for extent pointers in the block */
620 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
623 * this flag is only used internally by scrub and may be changed at any time
624 * it is only declared here to avoid collisions
626 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
628 struct btrfs_tree_block_info {
629 struct btrfs_disk_key key;
631 } __attribute__ ((__packed__));
633 struct btrfs_extent_data_ref {
638 } __attribute__ ((__packed__));
640 struct btrfs_shared_data_ref {
642 } __attribute__ ((__packed__));
644 struct btrfs_extent_inline_ref {
647 } __attribute__ ((__packed__));
649 /* old style backrefs item */
650 struct btrfs_extent_ref_v0 {
655 } __attribute__ ((__packed__));
658 /* dev extents record free space on individual devices. The owner
659 * field points back to the chunk allocation mapping tree that allocated
660 * the extent. The chunk tree uuid field is a way to double check the owner
662 struct btrfs_dev_extent {
664 __le64 chunk_objectid;
667 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
668 } __attribute__ ((__packed__));
670 struct btrfs_inode_ref {
674 } __attribute__ ((__packed__));
676 struct btrfs_inode_extref {
677 __le64 parent_objectid;
682 } __attribute__ ((__packed__));
684 struct btrfs_timespec {
687 } __attribute__ ((__packed__));
689 enum btrfs_compression_type {
690 BTRFS_COMPRESS_NONE = 0,
691 BTRFS_COMPRESS_ZLIB = 1,
692 BTRFS_COMPRESS_LZO = 2,
693 BTRFS_COMPRESS_TYPES = 2,
694 BTRFS_COMPRESS_LAST = 3,
697 struct btrfs_inode_item {
698 /* nfs style generation number */
700 /* transid that last touched this inode */
712 /* modification sequence number for NFS */
716 * a little future expansion, for more than this we can
717 * just grow the inode item and version it
720 struct btrfs_timespec atime;
721 struct btrfs_timespec ctime;
722 struct btrfs_timespec mtime;
723 struct btrfs_timespec otime;
724 } __attribute__ ((__packed__));
726 struct btrfs_dir_log_item {
728 } __attribute__ ((__packed__));
730 struct btrfs_dir_item {
731 struct btrfs_disk_key location;
736 } __attribute__ ((__packed__));
738 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
740 struct btrfs_root_item {
741 struct btrfs_inode_item inode;
747 __le64 last_snapshot;
750 struct btrfs_disk_key drop_progress;
755 * The following fields appear after subvol_uuids+subvol_times
760 * This generation number is used to test if the new fields are valid
761 * and up to date while reading the root item. Everytime the root item
762 * is written out, the "generation" field is copied into this field. If
763 * anyone ever mounted the fs with an older kernel, we will have
764 * mismatching generation values here and thus must invalidate the
765 * new fields. See btrfs_update_root and btrfs_find_last_root for
767 * the offset of generation_v2 is also used as the start for the memset
768 * when invalidating the fields.
770 __le64 generation_v2;
771 u8 uuid[BTRFS_UUID_SIZE];
772 u8 parent_uuid[BTRFS_UUID_SIZE];
773 u8 received_uuid[BTRFS_UUID_SIZE];
774 __le64 ctransid; /* updated when an inode changes */
775 __le64 otransid; /* trans when created */
776 __le64 stransid; /* trans when sent. non-zero for received subvol */
777 __le64 rtransid; /* trans when received. non-zero for received subvol */
778 struct btrfs_timespec ctime;
779 struct btrfs_timespec otime;
780 struct btrfs_timespec stime;
781 struct btrfs_timespec rtime;
782 __le64 reserved[8]; /* for future */
783 } __attribute__ ((__packed__));
786 * this is used for both forward and backward root refs
788 struct btrfs_root_ref {
792 } __attribute__ ((__packed__));
794 struct btrfs_disk_balance_args {
796 * profiles to operate on, single is denoted by
797 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
807 /* devid subset filter [pstart..pend) */
811 /* btrfs virtual address space subset filter [vstart..vend) */
816 * profile to convert to, single is denoted by
817 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
821 /* BTRFS_BALANCE_ARGS_* */
825 } __attribute__ ((__packed__));
828 * store balance parameters to disk so that balance can be properly
829 * resumed after crash or unmount
831 struct btrfs_balance_item {
832 /* BTRFS_BALANCE_* */
835 struct btrfs_disk_balance_args data;
836 struct btrfs_disk_balance_args meta;
837 struct btrfs_disk_balance_args sys;
840 } __attribute__ ((__packed__));
842 #define BTRFS_FILE_EXTENT_INLINE 0
843 #define BTRFS_FILE_EXTENT_REG 1
844 #define BTRFS_FILE_EXTENT_PREALLOC 2
846 struct btrfs_file_extent_item {
848 * transaction id that created this extent
852 * max number of bytes to hold this extent in ram
853 * when we split a compressed extent we can't know how big
854 * each of the resulting pieces will be. So, this is
855 * an upper limit on the size of the extent in ram instead of
861 * 32 bits for the various ways we might encode the data,
862 * including compression and encryption. If any of these
863 * are set to something a given disk format doesn't understand
864 * it is treated like an incompat flag for reading and writing,
869 __le16 other_encoding; /* spare for later use */
871 /* are we inline data or a real extent? */
875 * disk space consumed by the extent, checksum blocks are included
879 __le64 disk_num_bytes;
881 * the logical offset in file blocks (no csums)
882 * this extent record is for. This allows a file extent to point
883 * into the middle of an existing extent on disk, sharing it
884 * between two snapshots (useful if some bytes in the middle of the
885 * extent have changed
889 * the logical number of file blocks (no csums included). This
890 * always reflects the size uncompressed and without encoding.
894 } __attribute__ ((__packed__));
896 struct btrfs_csum_item {
898 } __attribute__ ((__packed__));
900 struct btrfs_dev_stats_item {
902 * grow this item struct at the end for future enhancements and keep
903 * the existing values unchanged
905 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
906 } __attribute__ ((__packed__));
908 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
909 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
910 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
911 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
912 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
913 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
914 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
916 struct btrfs_dev_replace {
917 u64 replace_state; /* see #define above */
918 u64 time_started; /* seconds since 1-Jan-1970 */
919 u64 time_stopped; /* seconds since 1-Jan-1970 */
920 atomic64_t num_write_errors;
921 atomic64_t num_uncorrectable_read_errors;
924 u64 committed_cursor_left;
925 u64 cursor_left_last_write_of_item;
928 u64 cont_reading_from_srcdev_mode; /* see #define above */
931 int item_needs_writeback;
932 struct btrfs_device *srcdev;
933 struct btrfs_device *tgtdev;
936 atomic_t nesting_level;
937 struct mutex lock_finishing_cancel_unmount;
938 struct mutex lock_management_lock;
941 struct btrfs_scrub_progress scrub_progress;
944 struct btrfs_dev_replace_item {
946 * grow this item struct at the end for future enhancements and keep
947 * the existing values unchanged
952 __le64 cont_reading_from_srcdev_mode;
954 __le64 replace_state;
957 __le64 num_write_errors;
958 __le64 num_uncorrectable_read_errors;
959 } __attribute__ ((__packed__));
961 /* different types of block groups (and chunks) */
962 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
963 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
964 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
965 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
966 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
967 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
968 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
969 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
970 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
971 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
973 enum btrfs_raid_types {
984 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
985 BTRFS_BLOCK_GROUP_SYSTEM | \
986 BTRFS_BLOCK_GROUP_METADATA)
988 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
989 BTRFS_BLOCK_GROUP_RAID1 | \
990 BTRFS_BLOCK_GROUP_RAID5 | \
991 BTRFS_BLOCK_GROUP_RAID6 | \
992 BTRFS_BLOCK_GROUP_DUP | \
993 BTRFS_BLOCK_GROUP_RAID10)
995 * We need a bit for restriper to be able to tell when chunks of type
996 * SINGLE are available. This "extended" profile format is used in
997 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
998 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
999 * to avoid remappings between two formats in future.
1001 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1003 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1004 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1006 static inline u64 chunk_to_extended(u64 flags)
1008 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1009 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1013 static inline u64 extended_to_chunk(u64 flags)
1015 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1018 struct btrfs_block_group_item {
1020 __le64 chunk_objectid;
1022 } __attribute__ ((__packed__));
1025 * is subvolume quota turned on?
1027 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1029 * RESCAN is set during the initialization phase
1031 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1033 * Some qgroup entries are known to be out of date,
1034 * either because the configuration has changed in a way that
1035 * makes a rescan necessary, or because the fs has been mounted
1036 * with a non-qgroup-aware version.
1037 * Turning qouta off and on again makes it inconsistent, too.
1039 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1041 #define BTRFS_QGROUP_STATUS_VERSION 1
1043 struct btrfs_qgroup_status_item {
1046 * the generation is updated during every commit. As older
1047 * versions of btrfs are not aware of qgroups, it will be
1048 * possible to detect inconsistencies by checking the
1049 * generation on mount time
1053 /* flag definitions see above */
1057 * only used during scanning to record the progress
1058 * of the scan. It contains a logical address
1061 } __attribute__ ((__packed__));
1063 struct btrfs_qgroup_info_item {
1069 } __attribute__ ((__packed__));
1071 /* flags definition for qgroup limits */
1072 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1073 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1074 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1075 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1076 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1077 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1079 struct btrfs_qgroup_limit_item {
1081 * only updated when any of the other values change
1088 } __attribute__ ((__packed__));
1090 struct btrfs_space_info {
1093 u64 total_bytes; /* total bytes in the space,
1094 this doesn't take mirrors into account */
1095 u64 bytes_used; /* total bytes used,
1096 this doesn't take mirrors into account */
1097 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1098 transaction finishes */
1099 u64 bytes_reserved; /* total bytes the allocator has reserved for
1100 current allocations */
1101 u64 bytes_readonly; /* total bytes that are read only */
1103 u64 bytes_may_use; /* number of bytes that may be used for
1104 delalloc/allocations */
1105 u64 disk_used; /* total bytes used on disk */
1106 u64 disk_total; /* total bytes on disk, takes mirrors into
1110 * bytes_pinned is kept in line with what is actually pinned, as in
1111 * we've called update_block_group and dropped the bytes_used counter
1112 * and increased the bytes_pinned counter. However this means that
1113 * bytes_pinned does not reflect the bytes that will be pinned once the
1114 * delayed refs are flushed, so this counter is inc'ed everytime we call
1115 * btrfs_free_extent so it is a realtime count of what will be freed
1116 * once the transaction is committed. It will be zero'ed everytime the
1117 * transaction commits.
1119 struct percpu_counter total_bytes_pinned;
1121 unsigned int full:1; /* indicates that we cannot allocate any more
1122 chunks for this space */
1123 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1125 unsigned int flush:1; /* set if we are trying to make space */
1127 unsigned int force_alloc; /* set if we need to force a chunk
1128 alloc for this space */
1130 struct list_head list;
1132 /* for block groups in our same type */
1133 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1135 struct rw_semaphore groups_sem;
1136 wait_queue_head_t wait;
1139 #define BTRFS_BLOCK_RSV_GLOBAL 1
1140 #define BTRFS_BLOCK_RSV_DELALLOC 2
1141 #define BTRFS_BLOCK_RSV_TRANS 3
1142 #define BTRFS_BLOCK_RSV_CHUNK 4
1143 #define BTRFS_BLOCK_RSV_DELOPS 5
1144 #define BTRFS_BLOCK_RSV_EMPTY 6
1145 #define BTRFS_BLOCK_RSV_TEMP 7
1147 struct btrfs_block_rsv {
1150 struct btrfs_space_info *space_info;
1152 unsigned short full;
1153 unsigned short type;
1154 unsigned short failfast;
1158 * free clusters are used to claim free space in relatively large chunks,
1159 * allowing us to do less seeky writes. They are used for all metadata
1160 * allocations and data allocations in ssd mode.
1162 struct btrfs_free_cluster {
1164 spinlock_t refill_lock;
1165 struct rb_root root;
1167 /* largest extent in this cluster */
1170 /* first extent starting offset */
1173 struct btrfs_block_group_cache *block_group;
1175 * when a cluster is allocated from a block group, we put the
1176 * cluster onto a list in the block group so that it can
1177 * be freed before the block group is freed.
1179 struct list_head block_group_list;
1182 enum btrfs_caching_type {
1184 BTRFS_CACHE_STARTED = 1,
1185 BTRFS_CACHE_FAST = 2,
1186 BTRFS_CACHE_FINISHED = 3,
1187 BTRFS_CACHE_ERROR = 4,
1190 enum btrfs_disk_cache_state {
1191 BTRFS_DC_WRITTEN = 0,
1195 BTRFS_DC_NEED_WRITE = 4,
1198 struct btrfs_caching_control {
1199 struct list_head list;
1201 wait_queue_head_t wait;
1202 struct btrfs_work work;
1203 struct btrfs_block_group_cache *block_group;
1208 struct btrfs_block_group_cache {
1209 struct btrfs_key key;
1210 struct btrfs_block_group_item item;
1211 struct btrfs_fs_info *fs_info;
1212 struct inode *inode;
1219 u64 cache_generation;
1221 /* for raid56, this is a full stripe, without parity */
1222 unsigned long full_stripe_len;
1225 unsigned int dirty:1;
1226 unsigned int iref:1;
1228 int disk_cache_state;
1230 /* cache tracking stuff */
1232 struct btrfs_caching_control *caching_ctl;
1233 u64 last_byte_to_unpin;
1235 struct btrfs_space_info *space_info;
1237 /* free space cache stuff */
1238 struct btrfs_free_space_ctl *free_space_ctl;
1240 /* block group cache stuff */
1241 struct rb_node cache_node;
1243 /* for block groups in the same raid type */
1244 struct list_head list;
1249 /* List of struct btrfs_free_clusters for this block group.
1250 * Today it will only have one thing on it, but that may change
1252 struct list_head cluster_list;
1254 /* For delayed block group creation */
1255 struct list_head new_bg_list;
1258 /* delayed seq elem */
1260 struct list_head list;
1264 enum btrfs_orphan_cleanup_state {
1265 ORPHAN_CLEANUP_STARTED = 1,
1266 ORPHAN_CLEANUP_DONE = 2,
1269 /* used by the raid56 code to lock stripes for read/modify/write */
1270 struct btrfs_stripe_hash {
1271 struct list_head hash_list;
1272 wait_queue_head_t wait;
1276 /* used by the raid56 code to lock stripes for read/modify/write */
1277 struct btrfs_stripe_hash_table {
1278 struct list_head stripe_cache;
1279 spinlock_t cache_lock;
1281 struct btrfs_stripe_hash table[];
1284 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1287 struct reloc_control;
1288 struct btrfs_device;
1289 struct btrfs_fs_devices;
1290 struct btrfs_balance_control;
1291 struct btrfs_delayed_root;
1292 struct btrfs_fs_info {
1293 u8 fsid[BTRFS_FSID_SIZE];
1294 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1295 struct btrfs_root *extent_root;
1296 struct btrfs_root *tree_root;
1297 struct btrfs_root *chunk_root;
1298 struct btrfs_root *dev_root;
1299 struct btrfs_root *fs_root;
1300 struct btrfs_root *csum_root;
1301 struct btrfs_root *quota_root;
1302 struct btrfs_root *uuid_root;
1304 /* the log root tree is a directory of all the other log roots */
1305 struct btrfs_root *log_root_tree;
1307 spinlock_t fs_roots_radix_lock;
1308 struct radix_tree_root fs_roots_radix;
1310 /* block group cache stuff */
1311 spinlock_t block_group_cache_lock;
1312 u64 first_logical_byte;
1313 struct rb_root block_group_cache_tree;
1315 /* keep track of unallocated space */
1316 spinlock_t free_chunk_lock;
1317 u64 free_chunk_space;
1319 struct extent_io_tree freed_extents[2];
1320 struct extent_io_tree *pinned_extents;
1322 /* logical->physical extent mapping */
1323 struct btrfs_mapping_tree mapping_tree;
1326 * block reservation for extent, checksum, root tree and
1327 * delayed dir index item
1329 struct btrfs_block_rsv global_block_rsv;
1330 /* block reservation for delay allocation */
1331 struct btrfs_block_rsv delalloc_block_rsv;
1332 /* block reservation for metadata operations */
1333 struct btrfs_block_rsv trans_block_rsv;
1334 /* block reservation for chunk tree */
1335 struct btrfs_block_rsv chunk_block_rsv;
1336 /* block reservation for delayed operations */
1337 struct btrfs_block_rsv delayed_block_rsv;
1339 struct btrfs_block_rsv empty_block_rsv;
1342 u64 last_trans_committed;
1345 * this is updated to the current trans every time a full commit
1346 * is required instead of the faster short fsync log commits
1348 u64 last_trans_log_full_commit;
1349 unsigned long mount_opt;
1350 unsigned long compress_type:4;
1351 int commit_interval;
1353 * It is a suggestive number, the read side is safe even it gets a
1354 * wrong number because we will write out the data into a regular
1355 * extent. The write side(mount/remount) is under ->s_umount lock,
1356 * so it is also safe.
1360 * Protected by ->chunk_mutex and sb->s_umount.
1362 * The reason that we use two lock to protect it is because only
1363 * remount and mount operations can change it and these two operations
1364 * are under sb->s_umount, but the read side (chunk allocation) can not
1365 * acquire sb->s_umount or the deadlock would happen. So we use two
1366 * locks to protect it. On the write side, we must acquire two locks,
1367 * and on the read side, we just need acquire one of them.
1370 struct btrfs_transaction *running_transaction;
1371 wait_queue_head_t transaction_throttle;
1372 wait_queue_head_t transaction_wait;
1373 wait_queue_head_t transaction_blocked_wait;
1374 wait_queue_head_t async_submit_wait;
1377 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1378 * when they are updated.
1380 * Because we do not clear the flags for ever, so we needn't use
1381 * the lock on the read side.
1383 * We also needn't use the lock when we mount the fs, because
1384 * there is no other task which will update the flag.
1386 spinlock_t super_lock;
1387 struct btrfs_super_block *super_copy;
1388 struct btrfs_super_block *super_for_commit;
1389 struct block_device *__bdev;
1390 struct super_block *sb;
1391 struct inode *btree_inode;
1392 struct backing_dev_info bdi;
1393 struct mutex tree_log_mutex;
1394 struct mutex transaction_kthread_mutex;
1395 struct mutex cleaner_mutex;
1396 struct mutex chunk_mutex;
1397 struct mutex volume_mutex;
1399 /* this is used during read/modify/write to make sure
1400 * no two ios are trying to mod the same stripe at the same
1403 struct btrfs_stripe_hash_table *stripe_hash_table;
1406 * this protects the ordered operations list only while we are
1407 * processing all of the entries on it. This way we make
1408 * sure the commit code doesn't find the list temporarily empty
1409 * because another function happens to be doing non-waiting preflush
1410 * before jumping into the main commit.
1412 struct mutex ordered_operations_mutex;
1415 * Same as ordered_operations_mutex except this is for ordered extents
1416 * and not the operations.
1418 struct mutex ordered_extent_flush_mutex;
1420 struct rw_semaphore extent_commit_sem;
1422 struct rw_semaphore cleanup_work_sem;
1424 struct rw_semaphore subvol_sem;
1425 struct srcu_struct subvol_srcu;
1427 spinlock_t trans_lock;
1429 * the reloc mutex goes with the trans lock, it is taken
1430 * during commit to protect us from the relocation code
1432 struct mutex reloc_mutex;
1434 struct list_head trans_list;
1435 struct list_head dead_roots;
1436 struct list_head caching_block_groups;
1438 spinlock_t delayed_iput_lock;
1439 struct list_head delayed_iputs;
1441 /* this protects tree_mod_seq_list */
1442 spinlock_t tree_mod_seq_lock;
1443 atomic64_t tree_mod_seq;
1444 struct list_head tree_mod_seq_list;
1445 struct seq_list tree_mod_seq_elem;
1447 /* this protects tree_mod_log */
1448 rwlock_t tree_mod_log_lock;
1449 struct rb_root tree_mod_log;
1451 atomic_t nr_async_submits;
1452 atomic_t async_submit_draining;
1453 atomic_t nr_async_bios;
1454 atomic_t async_delalloc_pages;
1455 atomic_t open_ioctl_trans;
1458 * this is used to protect the following list -- ordered_roots.
1460 spinlock_t ordered_root_lock;
1463 * all fs/file tree roots in which there are data=ordered extents
1464 * pending writeback are added into this list.
1466 * these can span multiple transactions and basically include
1467 * every dirty data page that isn't from nodatacow
1469 struct list_head ordered_roots;
1471 spinlock_t delalloc_root_lock;
1472 /* all fs/file tree roots that have delalloc inodes. */
1473 struct list_head delalloc_roots;
1476 * there is a pool of worker threads for checksumming during writes
1477 * and a pool for checksumming after reads. This is because readers
1478 * can run with FS locks held, and the writers may be waiting for
1479 * those locks. We don't want ordering in the pending list to cause
1480 * deadlocks, and so the two are serviced separately.
1482 * A third pool does submit_bio to avoid deadlocking with the other
1485 struct btrfs_workers generic_worker;
1486 struct btrfs_workers workers;
1487 struct btrfs_workers delalloc_workers;
1488 struct btrfs_workers flush_workers;
1489 struct btrfs_workers endio_workers;
1490 struct btrfs_workers endio_meta_workers;
1491 struct btrfs_workers endio_raid56_workers;
1492 struct btrfs_workers rmw_workers;
1493 struct btrfs_workers endio_meta_write_workers;
1494 struct btrfs_workers endio_write_workers;
1495 struct btrfs_workers endio_freespace_worker;
1496 struct btrfs_workers submit_workers;
1497 struct btrfs_workers caching_workers;
1498 struct btrfs_workers readahead_workers;
1501 * fixup workers take dirty pages that didn't properly go through
1502 * the cow mechanism and make them safe to write. It happens
1503 * for the sys_munmap function call path
1505 struct btrfs_workers fixup_workers;
1506 struct btrfs_workers delayed_workers;
1507 struct task_struct *transaction_kthread;
1508 struct task_struct *cleaner_kthread;
1509 int thread_pool_size;
1511 struct kobject super_kobj;
1512 struct completion kobj_unregister;
1515 int log_root_recovering;
1519 /* used to keep from writing metadata until there is a nice batch */
1520 struct percpu_counter dirty_metadata_bytes;
1521 struct percpu_counter delalloc_bytes;
1522 s32 dirty_metadata_batch;
1525 struct list_head dirty_cowonly_roots;
1527 struct btrfs_fs_devices *fs_devices;
1530 * the space_info list is almost entirely read only. It only changes
1531 * when we add a new raid type to the FS, and that happens
1532 * very rarely. RCU is used to protect it.
1534 struct list_head space_info;
1536 struct btrfs_space_info *data_sinfo;
1538 struct reloc_control *reloc_ctl;
1540 /* data_alloc_cluster is only used in ssd mode */
1541 struct btrfs_free_cluster data_alloc_cluster;
1543 /* all metadata allocations go through this cluster */
1544 struct btrfs_free_cluster meta_alloc_cluster;
1546 /* auto defrag inodes go here */
1547 spinlock_t defrag_inodes_lock;
1548 struct rb_root defrag_inodes;
1549 atomic_t defrag_running;
1551 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1552 seqlock_t profiles_lock;
1554 * these three are in extended format (availability of single
1555 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1556 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1558 u64 avail_data_alloc_bits;
1559 u64 avail_metadata_alloc_bits;
1560 u64 avail_system_alloc_bits;
1562 /* restriper state */
1563 spinlock_t balance_lock;
1564 struct mutex balance_mutex;
1565 atomic_t balance_running;
1566 atomic_t balance_pause_req;
1567 atomic_t balance_cancel_req;
1568 struct btrfs_balance_control *balance_ctl;
1569 wait_queue_head_t balance_wait_q;
1571 unsigned data_chunk_allocations;
1572 unsigned metadata_ratio;
1576 /* private scrub information */
1577 struct mutex scrub_lock;
1578 atomic_t scrubs_running;
1579 atomic_t scrub_pause_req;
1580 atomic_t scrubs_paused;
1581 atomic_t scrub_cancel_req;
1582 wait_queue_head_t scrub_pause_wait;
1583 struct rw_semaphore scrub_super_lock;
1584 int scrub_workers_refcnt;
1585 struct btrfs_workers scrub_workers;
1586 struct btrfs_workers scrub_wr_completion_workers;
1587 struct btrfs_workers scrub_nocow_workers;
1589 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1590 u32 check_integrity_print_mask;
1595 unsigned int quota_enabled:1;
1598 * quota_enabled only changes state after a commit. This holds the
1601 unsigned int pending_quota_state:1;
1603 /* is qgroup tracking in a consistent state? */
1606 /* holds configuration and tracking. Protected by qgroup_lock */
1607 struct rb_root qgroup_tree;
1608 spinlock_t qgroup_lock;
1611 * used to avoid frequently calling ulist_alloc()/ulist_free()
1612 * when doing qgroup accounting, it must be protected by qgroup_lock.
1614 struct ulist *qgroup_ulist;
1616 /* protect user change for quota operations */
1617 struct mutex qgroup_ioctl_lock;
1619 /* list of dirty qgroups to be written at next commit */
1620 struct list_head dirty_qgroups;
1622 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1625 /* qgroup rescan items */
1626 struct mutex qgroup_rescan_lock; /* protects the progress item */
1627 struct btrfs_key qgroup_rescan_progress;
1628 struct btrfs_workers qgroup_rescan_workers;
1629 struct completion qgroup_rescan_completion;
1630 struct btrfs_work qgroup_rescan_work;
1632 /* filesystem state */
1633 unsigned long fs_state;
1635 struct btrfs_delayed_root *delayed_root;
1637 /* readahead tree */
1638 spinlock_t reada_lock;
1639 struct radix_tree_root reada_tree;
1641 /* next backup root to be overwritten */
1642 int backup_root_index;
1644 int num_tolerated_disk_barrier_failures;
1646 /* device replace state */
1647 struct btrfs_dev_replace dev_replace;
1649 atomic_t mutually_exclusive_operation_running;
1651 struct semaphore uuid_tree_rescan_sem;
1652 unsigned int update_uuid_tree_gen:1;
1656 * in ram representation of the tree. extent_root is used for all allocations
1657 * and for the extent tree extent_root root.
1660 struct extent_buffer *node;
1662 struct extent_buffer *commit_root;
1663 struct btrfs_root *log_root;
1664 struct btrfs_root *reloc_root;
1666 struct btrfs_root_item root_item;
1667 struct btrfs_key root_key;
1668 struct btrfs_fs_info *fs_info;
1669 struct extent_io_tree dirty_log_pages;
1671 struct kobject root_kobj;
1672 struct completion kobj_unregister;
1673 struct mutex objectid_mutex;
1675 spinlock_t accounting_lock;
1676 struct btrfs_block_rsv *block_rsv;
1678 /* free ino cache stuff */
1679 struct mutex fs_commit_mutex;
1680 struct btrfs_free_space_ctl *free_ino_ctl;
1681 enum btrfs_caching_type cached;
1682 spinlock_t cache_lock;
1683 wait_queue_head_t cache_wait;
1684 struct btrfs_free_space_ctl *free_ino_pinned;
1686 struct inode *cache_inode;
1688 struct mutex log_mutex;
1689 wait_queue_head_t log_writer_wait;
1690 wait_queue_head_t log_commit_wait[2];
1691 atomic_t log_writers;
1692 atomic_t log_commit[2];
1694 unsigned long log_transid;
1695 unsigned long last_log_commit;
1696 pid_t log_start_pid;
1697 bool log_multiple_pids;
1702 /* data allocations are done in sectorsize units */
1705 /* node allocations are done in nodesize units */
1708 /* leaf allocations are done in leafsize units */
1715 u64 highest_objectid;
1717 /* btrfs_record_root_in_trans is a multi-step process,
1718 * and it can race with the balancing code. But the
1719 * race is very small, and only the first time the root
1720 * is added to each transaction. So in_trans_setup
1721 * is used to tell us when more checks are required
1723 unsigned long in_trans_setup;
1727 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1730 u64 defrag_trans_start;
1731 struct btrfs_key defrag_progress;
1732 struct btrfs_key defrag_max;
1736 /* the dirty list is only used by non-reference counted roots */
1737 struct list_head dirty_list;
1739 struct list_head root_list;
1741 spinlock_t log_extents_lock[2];
1742 struct list_head logged_list[2];
1744 spinlock_t orphan_lock;
1745 atomic_t orphan_inodes;
1746 struct btrfs_block_rsv *orphan_block_rsv;
1747 int orphan_item_inserted;
1748 int orphan_cleanup_state;
1750 spinlock_t inode_lock;
1751 /* red-black tree that keeps track of in-memory inodes */
1752 struct rb_root inode_tree;
1755 * radix tree that keeps track of delayed nodes of every inode,
1756 * protected by inode_lock
1758 struct radix_tree_root delayed_nodes_tree;
1760 * right now this just gets used so that a root has its own devid
1761 * for stat. It may be used for more later
1767 spinlock_t root_item_lock;
1770 spinlock_t delalloc_lock;
1772 * all of the inodes that have delalloc bytes. It is possible for
1773 * this list to be empty even when there is still dirty data=ordered
1774 * extents waiting to finish IO.
1776 struct list_head delalloc_inodes;
1777 struct list_head delalloc_root;
1778 u64 nr_delalloc_inodes;
1780 * this is used by the balancing code to wait for all the pending
1783 spinlock_t ordered_extent_lock;
1786 * all of the data=ordered extents pending writeback
1787 * these can span multiple transactions and basically include
1788 * every dirty data page that isn't from nodatacow
1790 struct list_head ordered_extents;
1791 struct list_head ordered_root;
1792 u64 nr_ordered_extents;
1795 struct btrfs_ioctl_defrag_range_args {
1796 /* start of the defrag operation */
1799 /* number of bytes to defrag, use (u64)-1 to say all */
1803 * flags for the operation, which can include turning
1804 * on compression for this one defrag
1809 * any extent bigger than this will be considered
1810 * already defragged. Use 0 to take the kernel default
1811 * Use 1 to say every single extent must be rewritten
1813 __u32 extent_thresh;
1816 * which compression method to use if turning on compression
1817 * for this defrag operation. If unspecified, zlib will
1820 __u32 compress_type;
1822 /* spare for later */
1828 * inode items have the data typically returned from stat and store other
1829 * info about object characteristics. There is one for every file and dir in
1832 #define BTRFS_INODE_ITEM_KEY 1
1833 #define BTRFS_INODE_REF_KEY 12
1834 #define BTRFS_INODE_EXTREF_KEY 13
1835 #define BTRFS_XATTR_ITEM_KEY 24
1836 #define BTRFS_ORPHAN_ITEM_KEY 48
1837 /* reserve 2-15 close to the inode for later flexibility */
1840 * dir items are the name -> inode pointers in a directory. There is one
1841 * for every name in a directory.
1843 #define BTRFS_DIR_LOG_ITEM_KEY 60
1844 #define BTRFS_DIR_LOG_INDEX_KEY 72
1845 #define BTRFS_DIR_ITEM_KEY 84
1846 #define BTRFS_DIR_INDEX_KEY 96
1848 * extent data is for file data
1850 #define BTRFS_EXTENT_DATA_KEY 108
1853 * extent csums are stored in a separate tree and hold csums for
1854 * an entire extent on disk.
1856 #define BTRFS_EXTENT_CSUM_KEY 128
1859 * root items point to tree roots. They are typically in the root
1860 * tree used by the super block to find all the other trees
1862 #define BTRFS_ROOT_ITEM_KEY 132
1865 * root backrefs tie subvols and snapshots to the directory entries that
1868 #define BTRFS_ROOT_BACKREF_KEY 144
1871 * root refs make a fast index for listing all of the snapshots and
1872 * subvolumes referenced by a given root. They point directly to the
1873 * directory item in the root that references the subvol
1875 #define BTRFS_ROOT_REF_KEY 156
1878 * extent items are in the extent map tree. These record which blocks
1879 * are used, and how many references there are to each block
1881 #define BTRFS_EXTENT_ITEM_KEY 168
1884 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1885 * the length, so we save the level in key->offset instead of the length.
1887 #define BTRFS_METADATA_ITEM_KEY 169
1889 #define BTRFS_TREE_BLOCK_REF_KEY 176
1891 #define BTRFS_EXTENT_DATA_REF_KEY 178
1893 #define BTRFS_EXTENT_REF_V0_KEY 180
1895 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1897 #define BTRFS_SHARED_DATA_REF_KEY 184
1900 * block groups give us hints into the extent allocation trees. Which
1901 * blocks are free etc etc
1903 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1905 #define BTRFS_DEV_EXTENT_KEY 204
1906 #define BTRFS_DEV_ITEM_KEY 216
1907 #define BTRFS_CHUNK_ITEM_KEY 228
1910 * Records the overall state of the qgroups.
1911 * There's only one instance of this key present,
1912 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1914 #define BTRFS_QGROUP_STATUS_KEY 240
1916 * Records the currently used space of the qgroup.
1917 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1919 #define BTRFS_QGROUP_INFO_KEY 242
1921 * Contains the user configured limits for the qgroup.
1922 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1924 #define BTRFS_QGROUP_LIMIT_KEY 244
1926 * Records the child-parent relationship of qgroups. For
1927 * each relation, 2 keys are present:
1928 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1929 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1931 #define BTRFS_QGROUP_RELATION_KEY 246
1933 #define BTRFS_BALANCE_ITEM_KEY 248
1936 * Persistantly stores the io stats in the device tree.
1937 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1939 #define BTRFS_DEV_STATS_KEY 249
1942 * Persistantly stores the device replace state in the device tree.
1943 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1945 #define BTRFS_DEV_REPLACE_KEY 250
1948 * Stores items that allow to quickly map UUIDs to something else.
1949 * These items are part of the filesystem UUID tree.
1950 * The key is built like this:
1951 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1953 #if BTRFS_UUID_SIZE != 16
1954 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1956 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1957 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1958 * received subvols */
1961 * string items are for debugging. They just store a short string of
1964 #define BTRFS_STRING_ITEM_KEY 253
1967 * Flags for mount options.
1969 * Note: don't forget to add new options to btrfs_show_options()
1971 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1972 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1973 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1974 #define BTRFS_MOUNT_SSD (1 << 3)
1975 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1976 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1977 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1978 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1979 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1980 #define BTRFS_MOUNT_NOSSD (1 << 9)
1981 #define BTRFS_MOUNT_DISCARD (1 << 10)
1982 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1983 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1984 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1985 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1986 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1987 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1988 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1989 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1990 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1991 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1992 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1993 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1994 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
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 unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2162 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2165 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2167 return (unsigned long)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 unsigned long 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 (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(int nr)
2468 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2471 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2472 struct btrfs_item *item)
2474 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2477 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2479 return btrfs_item_end(eb, btrfs_item_nr(nr));
2482 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2484 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2487 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2489 return btrfs_item_size(eb, btrfs_item_nr(nr));
2492 static inline void btrfs_item_key(struct extent_buffer *eb,
2493 struct btrfs_disk_key *disk_key, int nr)
2495 struct btrfs_item *item = btrfs_item_nr(nr);
2496 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2499 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2500 struct btrfs_disk_key *disk_key, int nr)
2502 struct btrfs_item *item = btrfs_item_nr(nr);
2503 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2506 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2509 * struct btrfs_root_ref
2511 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2512 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2513 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2515 /* struct btrfs_dir_item */
2516 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2517 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2518 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2519 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2520 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2521 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2523 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2525 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2528 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2529 struct btrfs_dir_item *item,
2530 struct btrfs_disk_key *key)
2532 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2535 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2536 struct btrfs_dir_item *item,
2537 struct btrfs_disk_key *key)
2539 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2542 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2544 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2546 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2549 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2550 struct btrfs_free_space_header *h,
2551 struct btrfs_disk_key *key)
2553 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2556 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2557 struct btrfs_free_space_header *h,
2558 struct btrfs_disk_key *key)
2560 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2563 /* struct btrfs_disk_key */
2564 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2566 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2567 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2569 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2570 struct btrfs_disk_key *disk)
2572 cpu->offset = le64_to_cpu(disk->offset);
2573 cpu->type = disk->type;
2574 cpu->objectid = le64_to_cpu(disk->objectid);
2577 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2578 struct btrfs_key *cpu)
2580 disk->offset = cpu_to_le64(cpu->offset);
2581 disk->type = cpu->type;
2582 disk->objectid = cpu_to_le64(cpu->objectid);
2585 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2586 struct btrfs_key *key, int nr)
2588 struct btrfs_disk_key disk_key;
2589 btrfs_node_key(eb, &disk_key, nr);
2590 btrfs_disk_key_to_cpu(key, &disk_key);
2593 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2594 struct btrfs_key *key, int nr)
2596 struct btrfs_disk_key disk_key;
2597 btrfs_item_key(eb, &disk_key, nr);
2598 btrfs_disk_key_to_cpu(key, &disk_key);
2601 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2602 struct btrfs_dir_item *item,
2603 struct btrfs_key *key)
2605 struct btrfs_disk_key disk_key;
2606 btrfs_dir_item_key(eb, item, &disk_key);
2607 btrfs_disk_key_to_cpu(key, &disk_key);
2611 static inline u8 btrfs_key_type(struct btrfs_key *key)
2616 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2621 /* struct btrfs_header */
2622 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2623 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2625 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2626 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2627 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2628 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2629 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2631 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2632 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2634 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2636 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2638 return (btrfs_header_flags(eb) & flag) == flag;
2641 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2643 u64 flags = btrfs_header_flags(eb);
2644 btrfs_set_header_flags(eb, flags | flag);
2645 return (flags & flag) == flag;
2648 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2650 u64 flags = btrfs_header_flags(eb);
2651 btrfs_set_header_flags(eb, flags & ~flag);
2652 return (flags & flag) == flag;
2655 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2657 u64 flags = btrfs_header_flags(eb);
2658 return flags >> BTRFS_BACKREF_REV_SHIFT;
2661 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2664 u64 flags = btrfs_header_flags(eb);
2665 flags &= ~BTRFS_BACKREF_REV_MASK;
2666 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2667 btrfs_set_header_flags(eb, flags);
2670 static inline unsigned long btrfs_header_fsid(struct extent_buffer *eb)
2672 return offsetof(struct btrfs_header, fsid);
2675 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2677 return offsetof(struct btrfs_header, chunk_tree_uuid);
2680 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2682 return btrfs_header_level(eb) == 0;
2685 /* struct btrfs_root_item */
2686 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2688 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2689 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2690 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2692 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2694 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2695 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2696 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2697 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2698 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2699 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2700 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2701 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2703 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2705 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2707 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2709 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2711 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2714 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2716 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2719 /* struct btrfs_root_backup */
2720 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2722 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2724 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2725 tree_root_level, 8);
2727 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2729 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2730 chunk_root_gen, 64);
2731 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2732 chunk_root_level, 8);
2734 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2736 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2737 extent_root_gen, 64);
2738 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2739 extent_root_level, 8);
2741 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2743 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2745 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2748 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2750 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2752 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2755 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2757 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2759 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2760 csum_root_level, 8);
2761 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2763 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2765 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2768 /* struct btrfs_balance_item */
2769 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2771 static inline void btrfs_balance_data(struct extent_buffer *eb,
2772 struct btrfs_balance_item *bi,
2773 struct btrfs_disk_balance_args *ba)
2775 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2778 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2779 struct btrfs_balance_item *bi,
2780 struct btrfs_disk_balance_args *ba)
2782 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2785 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2786 struct btrfs_balance_item *bi,
2787 struct btrfs_disk_balance_args *ba)
2789 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2792 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2793 struct btrfs_balance_item *bi,
2794 struct btrfs_disk_balance_args *ba)
2796 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2799 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2800 struct btrfs_balance_item *bi,
2801 struct btrfs_disk_balance_args *ba)
2803 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2806 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2807 struct btrfs_balance_item *bi,
2808 struct btrfs_disk_balance_args *ba)
2810 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2814 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2815 struct btrfs_disk_balance_args *disk)
2817 memset(cpu, 0, sizeof(*cpu));
2819 cpu->profiles = le64_to_cpu(disk->profiles);
2820 cpu->usage = le64_to_cpu(disk->usage);
2821 cpu->devid = le64_to_cpu(disk->devid);
2822 cpu->pstart = le64_to_cpu(disk->pstart);
2823 cpu->pend = le64_to_cpu(disk->pend);
2824 cpu->vstart = le64_to_cpu(disk->vstart);
2825 cpu->vend = le64_to_cpu(disk->vend);
2826 cpu->target = le64_to_cpu(disk->target);
2827 cpu->flags = le64_to_cpu(disk->flags);
2831 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2832 struct btrfs_balance_args *cpu)
2834 memset(disk, 0, sizeof(*disk));
2836 disk->profiles = cpu_to_le64(cpu->profiles);
2837 disk->usage = cpu_to_le64(cpu->usage);
2838 disk->devid = cpu_to_le64(cpu->devid);
2839 disk->pstart = cpu_to_le64(cpu->pstart);
2840 disk->pend = cpu_to_le64(cpu->pend);
2841 disk->vstart = cpu_to_le64(cpu->vstart);
2842 disk->vend = cpu_to_le64(cpu->vend);
2843 disk->target = cpu_to_le64(cpu->target);
2844 disk->flags = cpu_to_le64(cpu->flags);
2847 /* struct btrfs_super_block */
2848 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2849 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2850 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2852 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2853 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2854 struct btrfs_super_block, sys_chunk_array_size, 32);
2855 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2856 struct btrfs_super_block, chunk_root_generation, 64);
2857 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2859 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2861 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2862 chunk_root_level, 8);
2863 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2865 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2866 log_root_transid, 64);
2867 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2869 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2871 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2873 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2875 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2877 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2879 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2881 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2882 root_dir_objectid, 64);
2883 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2885 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2887 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2888 compat_ro_flags, 64);
2889 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2890 incompat_flags, 64);
2891 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2893 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2894 cache_generation, 64);
2895 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2896 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2897 uuid_tree_generation, 64);
2899 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2901 u16 t = btrfs_super_csum_type(s);
2903 * csum type is validated at mount time
2905 return btrfs_csum_sizes[t];
2908 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2910 return offsetof(struct btrfs_leaf, items);
2913 /* struct btrfs_file_extent_item */
2914 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2915 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2916 struct btrfs_file_extent_item, disk_bytenr, 64);
2917 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2918 struct btrfs_file_extent_item, offset, 64);
2919 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2920 struct btrfs_file_extent_item, generation, 64);
2921 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2922 struct btrfs_file_extent_item, num_bytes, 64);
2924 static inline unsigned long
2925 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2927 unsigned long offset = (unsigned long)e;
2928 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2932 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2934 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2937 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2939 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2941 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2942 disk_num_bytes, 64);
2943 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2945 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2947 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2949 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2951 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2953 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2954 other_encoding, 16);
2956 /* this returns the number of file bytes represented by the inline item.
2957 * If an item is compressed, this is the uncompressed size
2959 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2960 struct btrfs_file_extent_item *e)
2962 return btrfs_file_extent_ram_bytes(eb, e);
2966 * this returns the number of bytes used by the item on disk, minus the
2967 * size of any extent headers. If a file is compressed on disk, this is
2968 * the compressed size
2970 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2971 struct btrfs_item *e)
2973 unsigned long offset;
2974 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2975 return btrfs_item_size(eb, e) - offset;
2978 /* btrfs_dev_stats_item */
2979 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2980 struct btrfs_dev_stats_item *ptr,
2985 read_extent_buffer(eb, &val,
2986 offsetof(struct btrfs_dev_stats_item, values) +
2987 ((unsigned long)ptr) + (index * sizeof(u64)),
2992 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2993 struct btrfs_dev_stats_item *ptr,
2996 write_extent_buffer(eb, &val,
2997 offsetof(struct btrfs_dev_stats_item, values) +
2998 ((unsigned long)ptr) + (index * sizeof(u64)),
3002 /* btrfs_qgroup_status_item */
3003 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3005 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3007 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3009 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3012 /* btrfs_qgroup_info_item */
3013 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3015 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3016 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3018 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3019 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3022 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3023 struct btrfs_qgroup_info_item, generation, 64);
3024 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3026 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3027 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3028 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3030 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3031 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3033 /* btrfs_qgroup_limit_item */
3034 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3036 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3038 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3040 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3042 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3045 /* btrfs_dev_replace_item */
3046 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3047 struct btrfs_dev_replace_item, src_devid, 64);
3048 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3049 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3051 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3053 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3055 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3057 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3058 num_write_errors, 64);
3059 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3060 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3062 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3064 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3067 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3068 struct btrfs_dev_replace_item, src_devid, 64);
3069 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3070 struct btrfs_dev_replace_item,
3071 cont_reading_from_srcdev_mode, 64);
3072 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3073 struct btrfs_dev_replace_item, replace_state, 64);
3074 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3075 struct btrfs_dev_replace_item, time_started, 64);
3076 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3077 struct btrfs_dev_replace_item, time_stopped, 64);
3078 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3079 struct btrfs_dev_replace_item, num_write_errors, 64);
3080 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3081 struct btrfs_dev_replace_item,
3082 num_uncorrectable_read_errors, 64);
3083 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3084 struct btrfs_dev_replace_item, cursor_left, 64);
3085 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3086 struct btrfs_dev_replace_item, cursor_right, 64);
3088 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3090 return sb->s_fs_info;
3093 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3096 return root->leafsize;
3097 return root->nodesize;
3100 /* helper function to cast into the data area of the leaf. */
3101 #define btrfs_item_ptr(leaf, slot, type) \
3102 ((type *)(btrfs_leaf_data(leaf) + \
3103 btrfs_item_offset_nr(leaf, slot)))
3105 #define btrfs_item_ptr_offset(leaf, slot) \
3106 ((unsigned long)(btrfs_leaf_data(leaf) + \
3107 btrfs_item_offset_nr(leaf, slot)))
3109 static inline struct dentry *fdentry(struct file *file)
3111 return file->f_path.dentry;
3114 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3116 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3117 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3120 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3122 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3126 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3129 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3134 * Doing a truncate won't result in new nodes or leaves, just what we need for
3137 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3140 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3144 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3145 struct btrfs_root *root);
3146 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3147 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3148 struct btrfs_root *root, unsigned long count);
3149 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3150 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3151 struct btrfs_root *root, u64 bytenr,
3152 u64 offset, int metadata, u64 *refs, u64 *flags);
3153 int btrfs_pin_extent(struct btrfs_root *root,
3154 u64 bytenr, u64 num, int reserved);
3155 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3156 u64 bytenr, u64 num_bytes);
3157 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3158 struct extent_buffer *eb);
3159 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3160 struct btrfs_root *root,
3161 u64 objectid, u64 offset, u64 bytenr);
3162 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3163 struct btrfs_fs_info *info,
3165 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3166 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3167 struct btrfs_root *root, u32 blocksize,
3168 u64 parent, u64 root_objectid,
3169 struct btrfs_disk_key *key, int level,
3170 u64 hint, u64 empty_size);
3171 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3172 struct btrfs_root *root,
3173 struct extent_buffer *buf,
3174 u64 parent, int last_ref);
3175 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3176 struct btrfs_root *root,
3177 u64 root_objectid, u64 owner,
3178 u64 offset, struct btrfs_key *ins);
3179 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3180 struct btrfs_root *root,
3181 u64 root_objectid, u64 owner, u64 offset,
3182 struct btrfs_key *ins);
3183 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3184 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3185 struct btrfs_key *ins, int is_data);
3186 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3187 struct extent_buffer *buf, int full_backref, int for_cow);
3188 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3189 struct extent_buffer *buf, int full_backref, int for_cow);
3190 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3191 struct btrfs_root *root,
3192 u64 bytenr, u64 num_bytes, u64 flags,
3193 int level, int is_data);
3194 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3195 struct btrfs_root *root,
3196 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3197 u64 owner, u64 offset, int for_cow);
3199 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3200 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3201 u64 start, u64 len);
3202 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3203 struct btrfs_root *root);
3204 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3205 struct btrfs_root *root);
3206 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root,
3208 u64 bytenr, u64 num_bytes, u64 parent,
3209 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3211 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3212 struct btrfs_root *root);
3213 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3214 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3215 int btrfs_read_block_groups(struct btrfs_root *root);
3216 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3217 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3218 struct btrfs_root *root, u64 bytes_used,
3219 u64 type, u64 chunk_objectid, u64 chunk_offset,
3221 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3222 struct btrfs_root *root, u64 group_start);
3223 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3224 struct btrfs_root *root);
3225 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3226 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3228 enum btrfs_reserve_flush_enum {
3229 /* If we are in the transaction, we can't flush anything.*/
3230 BTRFS_RESERVE_NO_FLUSH,
3232 * Flushing delalloc may cause deadlock somewhere, in this
3233 * case, use FLUSH LIMIT
3235 BTRFS_RESERVE_FLUSH_LIMIT,
3236 BTRFS_RESERVE_FLUSH_ALL,
3239 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3240 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3241 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3242 struct btrfs_root *root);
3243 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3244 struct inode *inode);
3245 void btrfs_orphan_release_metadata(struct inode *inode);
3246 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3247 struct btrfs_block_rsv *rsv,
3249 u64 *qgroup_reserved, bool use_global_rsv);
3250 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3251 struct btrfs_block_rsv *rsv,
3252 u64 qgroup_reserved);
3253 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3254 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3255 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3256 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3257 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3258 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3259 unsigned short type);
3260 void btrfs_free_block_rsv(struct btrfs_root *root,
3261 struct btrfs_block_rsv *rsv);
3262 int btrfs_block_rsv_add(struct btrfs_root *root,
3263 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3264 enum btrfs_reserve_flush_enum flush);
3265 int btrfs_block_rsv_check(struct btrfs_root *root,
3266 struct btrfs_block_rsv *block_rsv, int min_factor);
3267 int btrfs_block_rsv_refill(struct btrfs_root *root,
3268 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3269 enum btrfs_reserve_flush_enum flush);
3270 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3271 struct btrfs_block_rsv *dst_rsv,
3273 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3274 struct btrfs_block_rsv *dest, u64 num_bytes,
3276 void btrfs_block_rsv_release(struct btrfs_root *root,
3277 struct btrfs_block_rsv *block_rsv,
3279 int btrfs_set_block_group_ro(struct btrfs_root *root,
3280 struct btrfs_block_group_cache *cache);
3281 void btrfs_set_block_group_rw(struct btrfs_root *root,
3282 struct btrfs_block_group_cache *cache);
3283 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3284 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3285 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3286 u64 start, u64 end);
3287 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3288 u64 num_bytes, u64 *actual_bytes);
3289 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3290 struct btrfs_root *root, u64 type);
3291 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3293 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3294 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3295 struct btrfs_fs_info *fs_info);
3296 int __get_raid_index(u64 flags);
3298 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3299 int level, int *slot);
3300 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3301 int btrfs_previous_item(struct btrfs_root *root,
3302 struct btrfs_path *path, u64 min_objectid,
3304 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3305 struct btrfs_key *new_key);
3306 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3307 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3308 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3309 struct btrfs_key *key, int lowest_level,
3311 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3312 struct btrfs_key *max_key,
3313 struct btrfs_path *path,
3315 enum btrfs_compare_tree_result {
3316 BTRFS_COMPARE_TREE_NEW,
3317 BTRFS_COMPARE_TREE_DELETED,
3318 BTRFS_COMPARE_TREE_CHANGED,
3319 BTRFS_COMPARE_TREE_SAME,
3321 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3322 struct btrfs_root *right_root,
3323 struct btrfs_path *left_path,
3324 struct btrfs_path *right_path,
3325 struct btrfs_key *key,
3326 enum btrfs_compare_tree_result result,
3328 int btrfs_compare_trees(struct btrfs_root *left_root,
3329 struct btrfs_root *right_root,
3330 btrfs_changed_cb_t cb, void *ctx);
3331 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3332 struct btrfs_root *root, struct extent_buffer *buf,
3333 struct extent_buffer *parent, int parent_slot,
3334 struct extent_buffer **cow_ret);
3335 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3336 struct btrfs_root *root,
3337 struct extent_buffer *buf,
3338 struct extent_buffer **cow_ret, u64 new_root_objectid);
3339 int btrfs_block_can_be_shared(struct btrfs_root *root,
3340 struct extent_buffer *buf);
3341 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3343 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3344 u32 new_size, int from_end);
3345 int btrfs_split_item(struct btrfs_trans_handle *trans,
3346 struct btrfs_root *root,
3347 struct btrfs_path *path,
3348 struct btrfs_key *new_key,
3349 unsigned long split_offset);
3350 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3351 struct btrfs_root *root,
3352 struct btrfs_path *path,
3353 struct btrfs_key *new_key);
3354 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3355 *root, struct btrfs_key *key, struct btrfs_path *p, int
3357 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3358 struct btrfs_path *p, u64 time_seq);
3359 int btrfs_search_slot_for_read(struct btrfs_root *root,
3360 struct btrfs_key *key, struct btrfs_path *p,
3361 int find_higher, int return_any);
3362 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3363 struct btrfs_root *root, struct extent_buffer *parent,
3364 int start_slot, u64 *last_ret,
3365 struct btrfs_key *progress);
3366 void btrfs_release_path(struct btrfs_path *p);
3367 struct btrfs_path *btrfs_alloc_path(void);
3368 void btrfs_free_path(struct btrfs_path *p);
3369 void btrfs_set_path_blocking(struct btrfs_path *p);
3370 void btrfs_clear_path_blocking(struct btrfs_path *p,
3371 struct extent_buffer *held, int held_rw);
3372 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3374 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3375 struct btrfs_path *path, int slot, int nr);
3376 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3377 struct btrfs_root *root,
3378 struct btrfs_path *path)
3380 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3383 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3384 struct btrfs_key *cpu_key, u32 *data_size,
3385 u32 total_data, u32 total_size, int nr);
3386 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3387 *root, struct btrfs_key *key, void *data, u32 data_size);
3388 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3389 struct btrfs_root *root,
3390 struct btrfs_path *path,
3391 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3393 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3394 struct btrfs_root *root,
3395 struct btrfs_path *path,
3396 struct btrfs_key *key,
3399 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3402 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3403 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3405 static inline int btrfs_next_old_item(struct btrfs_root *root,
3406 struct btrfs_path *p, u64 time_seq)
3409 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3410 return btrfs_next_old_leaf(root, p, time_seq);
3413 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3415 return btrfs_next_old_item(root, p, 0);
3417 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3418 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3419 struct btrfs_block_rsv *block_rsv,
3420 int update_ref, int for_reloc);
3421 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3422 struct btrfs_root *root,
3423 struct extent_buffer *node,
3424 struct extent_buffer *parent);
3425 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3428 * Get synced with close_ctree()
3431 return fs_info->closing;
3435 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3436 * anything except sleeping. This function is used to check the status of
3439 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3441 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3442 btrfs_fs_closing(root->fs_info));
3445 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3447 kfree(fs_info->balance_ctl);
3448 kfree(fs_info->delayed_root);
3449 kfree(fs_info->extent_root);
3450 kfree(fs_info->tree_root);
3451 kfree(fs_info->chunk_root);
3452 kfree(fs_info->dev_root);
3453 kfree(fs_info->csum_root);
3454 kfree(fs_info->quota_root);
3455 kfree(fs_info->uuid_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,
3507 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3508 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3512 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3513 const char *name, int name_len);
3514 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3515 struct btrfs_root *root, const char *name,
3516 int name_len, struct inode *dir,
3517 struct btrfs_key *location, u8 type, u64 index);
3518 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3519 struct btrfs_root *root,
3520 struct btrfs_path *path, u64 dir,
3521 const char *name, int name_len,
3523 struct btrfs_dir_item *
3524 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3525 struct btrfs_root *root,
3526 struct btrfs_path *path, u64 dir,
3527 u64 objectid, const char *name, int name_len,
3529 struct btrfs_dir_item *
3530 btrfs_search_dir_index_item(struct btrfs_root *root,
3531 struct btrfs_path *path, u64 dirid,
3532 const char *name, int name_len);
3533 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3534 struct btrfs_root *root,
3535 struct btrfs_path *path,
3536 struct btrfs_dir_item *di);
3537 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3538 struct btrfs_root *root,
3539 struct btrfs_path *path, u64 objectid,
3540 const char *name, u16 name_len,
3541 const void *data, u16 data_len);
3542 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3543 struct btrfs_root *root,
3544 struct btrfs_path *path, u64 dir,
3545 const char *name, u16 name_len,
3547 int verify_dir_item(struct btrfs_root *root,
3548 struct extent_buffer *leaf,
3549 struct btrfs_dir_item *dir_item);
3552 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3553 struct btrfs_root *root, u64 offset);
3554 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3555 struct btrfs_root *root, u64 offset);
3556 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3559 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3560 struct btrfs_root *root,
3561 const char *name, int name_len,
3562 u64 inode_objectid, u64 ref_objectid, u64 index);
3563 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3564 struct btrfs_root *root,
3565 const char *name, int name_len,
3566 u64 inode_objectid, u64 ref_objectid, u64 *index);
3567 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3568 struct btrfs_root *root,
3569 struct btrfs_path *path,
3570 const char *name, int name_len,
3571 u64 inode_objectid, u64 ref_objectid, int mod,
3573 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3574 struct btrfs_root *root,
3575 struct btrfs_path *path, u64 objectid);
3576 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3577 *root, struct btrfs_path *path,
3578 struct btrfs_key *location, int mod);
3580 struct btrfs_inode_extref *
3581 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3582 struct btrfs_root *root,
3583 struct btrfs_path *path,
3584 const char *name, int name_len,
3585 u64 inode_objectid, u64 ref_objectid, int ins_len,
3588 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3589 u64 ref_objectid, const char *name,
3591 struct btrfs_inode_extref **extref_ret);
3594 struct btrfs_dio_private;
3595 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3596 struct btrfs_root *root, u64 bytenr, u64 len);
3597 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3598 struct bio *bio, u32 *dst);
3599 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3600 struct btrfs_dio_private *dip, struct bio *bio,
3601 u64 logical_offset);
3602 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3603 struct btrfs_root *root,
3604 u64 objectid, u64 pos,
3605 u64 disk_offset, u64 disk_num_bytes,
3606 u64 num_bytes, u64 offset, u64 ram_bytes,
3607 u8 compression, u8 encryption, u16 other_encoding);
3608 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3609 struct btrfs_root *root,
3610 struct btrfs_path *path, u64 objectid,
3611 u64 bytenr, int mod);
3612 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3613 struct btrfs_root *root,
3614 struct btrfs_ordered_sum *sums);
3615 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3616 struct bio *bio, u64 file_start, int contig);
3617 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3618 struct btrfs_root *root, struct btrfs_path *path,
3620 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3621 struct list_head *list, int search_commit);
3623 struct btrfs_delalloc_work {
3624 struct inode *inode;
3627 struct completion completion;
3628 struct list_head list;
3629 struct btrfs_work work;
3632 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3633 int wait, int delay_iput);
3634 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3636 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3637 size_t pg_offset, u64 start, u64 len,
3639 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3640 u64 *orig_start, u64 *orig_block_len,
3643 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3644 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3645 #define ClearPageChecked ClearPageFsMisc
3646 #define SetPageChecked SetPageFsMisc
3647 #define PageChecked PageFsMisc
3650 /* This forces readahead on a given range of bytes in an inode */
3651 static inline void btrfs_force_ra(struct address_space *mapping,
3652 struct file_ra_state *ra, struct file *file,
3653 pgoff_t offset, unsigned long req_size)
3655 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3658 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3659 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3660 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3661 struct btrfs_root *root,
3662 struct inode *dir, struct inode *inode,
3663 const char *name, int name_len);
3664 int btrfs_add_link(struct btrfs_trans_handle *trans,
3665 struct inode *parent_inode, struct inode *inode,
3666 const char *name, int name_len, int add_backref, u64 index);
3667 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3668 struct btrfs_root *root,
3669 struct inode *dir, u64 objectid,
3670 const char *name, int name_len);
3671 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3673 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3674 struct btrfs_root *root,
3675 struct inode *inode, u64 new_size,
3678 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3679 int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info *fs_info,
3681 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3682 struct extent_state **cached_state);
3683 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3684 struct btrfs_root *new_root, u64 new_dirid);
3685 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3686 size_t size, struct bio *bio,
3687 unsigned long bio_flags);
3688 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3689 int btrfs_readpage(struct file *file, struct page *page);
3690 void btrfs_evict_inode(struct inode *inode);
3691 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3692 struct inode *btrfs_alloc_inode(struct super_block *sb);
3693 void btrfs_destroy_inode(struct inode *inode);
3694 int btrfs_drop_inode(struct inode *inode);
3695 int btrfs_init_cachep(void);
3696 void btrfs_destroy_cachep(void);
3697 long btrfs_ioctl_trans_end(struct file *file);
3698 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3699 struct btrfs_root *root, int *was_new);
3700 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3701 size_t pg_offset, u64 start, u64 end,
3703 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3704 struct btrfs_root *root,
3705 struct inode *inode);
3706 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3707 struct btrfs_root *root, struct inode *inode);
3708 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3709 int btrfs_orphan_cleanup(struct btrfs_root *root);
3710 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3711 struct btrfs_root *root);
3712 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3713 void btrfs_invalidate_inodes(struct btrfs_root *root);
3714 void btrfs_add_delayed_iput(struct inode *inode);
3715 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3716 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3717 u64 start, u64 num_bytes, u64 min_size,
3718 loff_t actual_len, u64 *alloc_hint);
3719 int btrfs_prealloc_file_range_trans(struct inode *inode,
3720 struct btrfs_trans_handle *trans, int mode,
3721 u64 start, u64 num_bytes, u64 min_size,
3722 loff_t actual_len, u64 *alloc_hint);
3723 extern const struct dentry_operations btrfs_dentry_operations;
3726 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3727 void btrfs_update_iflags(struct inode *inode);
3728 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3729 int btrfs_is_empty_uuid(u8 *uuid);
3730 int btrfs_defrag_file(struct inode *inode, struct file *file,
3731 struct btrfs_ioctl_defrag_range_args *range,
3732 u64 newer_than, unsigned long max_pages);
3733 void btrfs_get_block_group_info(struct list_head *groups_list,
3734 struct btrfs_ioctl_space_info *space);
3735 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3736 struct btrfs_ioctl_balance_args *bargs);
3740 int btrfs_auto_defrag_init(void);
3741 void btrfs_auto_defrag_exit(void);
3742 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3743 struct inode *inode);
3744 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3745 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3746 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3747 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3749 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3750 u64 start, u64 end, int skip_pinned,
3752 extern const struct file_operations btrfs_file_operations;
3753 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3754 struct btrfs_root *root, struct inode *inode,
3755 struct btrfs_path *path, u64 start, u64 end,
3756 u64 *drop_end, int drop_cache);
3757 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3758 struct btrfs_root *root, struct inode *inode, u64 start,
3759 u64 end, int drop_cache);
3760 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3761 struct inode *inode, u64 start, u64 end);
3762 int btrfs_release_file(struct inode *inode, struct file *file);
3763 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3764 struct page **pages, size_t num_pages,
3765 loff_t pos, size_t write_bytes,
3766 struct extent_state **cached);
3769 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3770 struct btrfs_root *root);
3773 int btrfs_init_sysfs(void);
3774 void btrfs_exit_sysfs(void);
3777 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3780 int btrfs_parse_options(struct btrfs_root *root, char *options);
3781 int btrfs_sync_fs(struct super_block *sb, int wait);
3783 #ifdef CONFIG_PRINTK
3785 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3787 static inline __printf(2, 3)
3788 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3793 #define btrfs_emerg(fs_info, fmt, args...) \
3794 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3795 #define btrfs_alert(fs_info, fmt, args...) \
3796 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3797 #define btrfs_crit(fs_info, fmt, args...) \
3798 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3799 #define btrfs_err(fs_info, fmt, args...) \
3800 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3801 #define btrfs_warn(fs_info, fmt, args...) \
3802 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3803 #define btrfs_notice(fs_info, fmt, args...) \
3804 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3805 #define btrfs_info(fs_info, fmt, args...) \
3806 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3807 #define btrfs_debug(fs_info, fmt, args...) \
3808 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3810 #ifdef CONFIG_BTRFS_ASSERT
3812 static inline void assfail(char *expr, char *file, int line)
3814 printk(KERN_ERR "BTRFS assertion failed: %s, file: %s, line: %d",
3819 #define ASSERT(expr) \
3820 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3822 #define ASSERT(expr) ((void)0)
3825 #define btrfs_assert()
3827 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3828 unsigned int line, int errno, const char *fmt, ...);
3831 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3832 struct btrfs_root *root, const char *function,
3833 unsigned int line, int errno);
3835 #define btrfs_set_fs_incompat(__fs_info, opt) \
3836 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3838 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3841 struct btrfs_super_block *disk_super;
3844 disk_super = fs_info->super_copy;
3845 features = btrfs_super_incompat_flags(disk_super);
3846 if (!(features & flag)) {
3847 spin_lock(&fs_info->super_lock);
3848 features = btrfs_super_incompat_flags(disk_super);
3849 if (!(features & flag)) {
3851 btrfs_set_super_incompat_flags(disk_super, features);
3852 printk(KERN_INFO "btrfs: setting %llu feature flag\n",
3855 spin_unlock(&fs_info->super_lock);
3859 #define btrfs_fs_incompat(fs_info, opt) \
3860 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3862 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3864 struct btrfs_super_block *disk_super;
3865 disk_super = fs_info->super_copy;
3866 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3870 * Call btrfs_abort_transaction as early as possible when an error condition is
3871 * detected, that way the exact line number is reported.
3874 #define btrfs_abort_transaction(trans, root, errno) \
3876 __btrfs_abort_transaction(trans, root, __func__, \
3880 #define btrfs_std_error(fs_info, errno) \
3883 __btrfs_std_error((fs_info), __func__, \
3884 __LINE__, (errno), NULL); \
3887 #define btrfs_error(fs_info, errno, fmt, args...) \
3889 __btrfs_std_error((fs_info), __func__, __LINE__, \
3890 (errno), fmt, ##args); \
3894 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3895 unsigned int line, int errno, const char *fmt, ...);
3898 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3899 * will panic(). Otherwise we BUG() here.
3901 #define btrfs_panic(fs_info, errno, fmt, args...) \
3903 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3908 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3909 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3910 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3911 struct inode *inode, struct inode *dir);
3912 int btrfs_acl_chmod(struct inode *inode);
3914 #define btrfs_get_acl NULL
3915 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3916 struct inode *inode, struct inode *dir)
3920 static inline int btrfs_acl_chmod(struct inode *inode)
3927 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3928 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3929 struct btrfs_root *root);
3930 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3931 struct btrfs_root *root);
3932 int btrfs_recover_relocation(struct btrfs_root *root);
3933 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3934 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3935 struct btrfs_root *root, struct extent_buffer *buf,
3936 struct extent_buffer *cow);
3937 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3938 struct btrfs_pending_snapshot *pending,
3939 u64 *bytes_to_reserve);
3940 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3941 struct btrfs_pending_snapshot *pending);
3944 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3945 u64 end, struct btrfs_scrub_progress *progress,
3946 int readonly, int is_dev_replace);
3947 void btrfs_scrub_pause(struct btrfs_root *root);
3948 void btrfs_scrub_pause_super(struct btrfs_root *root);
3949 void btrfs_scrub_continue(struct btrfs_root *root);
3950 void btrfs_scrub_continue_super(struct btrfs_root *root);
3951 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3952 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3953 struct btrfs_device *dev);
3954 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3955 struct btrfs_scrub_progress *progress);
3958 struct reada_control {
3959 struct btrfs_root *root; /* tree to prefetch */
3960 struct btrfs_key key_start;
3961 struct btrfs_key key_end; /* exclusive */
3964 wait_queue_head_t wait;
3966 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3967 struct btrfs_key *start, struct btrfs_key *end);
3968 int btrfs_reada_wait(void *handle);
3969 void btrfs_reada_detach(void *handle);
3970 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3971 u64 start, int err);
3974 struct qgroup_update {
3975 struct list_head list;
3976 struct btrfs_delayed_ref_node *node;
3977 struct btrfs_delayed_extent_op *extent_op;
3980 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3981 struct btrfs_fs_info *fs_info);
3982 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3983 struct btrfs_fs_info *fs_info);
3984 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
3985 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
3986 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
3987 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3988 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3989 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3990 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3991 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3992 struct btrfs_fs_info *fs_info, u64 qgroupid,
3994 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3995 struct btrfs_fs_info *fs_info, u64 qgroupid);
3996 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3997 struct btrfs_fs_info *fs_info, u64 qgroupid,
3998 struct btrfs_qgroup_limit *limit);
3999 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
4000 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
4001 struct btrfs_delayed_extent_op;
4002 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
4003 struct btrfs_delayed_ref_node *node,
4004 struct btrfs_delayed_extent_op *extent_op);
4005 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
4006 struct btrfs_fs_info *fs_info,
4007 struct btrfs_delayed_ref_node *node,
4008 struct btrfs_delayed_extent_op *extent_op);
4009 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
4010 struct btrfs_fs_info *fs_info);
4011 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
4012 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
4013 struct btrfs_qgroup_inherit *inherit);
4014 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
4015 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
4017 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
4019 static inline int is_fstree(u64 rootid)
4021 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4022 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4027 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4029 return signal_pending(current);