2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for storing
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
158 * Theoretical limit is larger, but we keep this down to a sane
159 * value. That should limit greatly the possibility of collisions on
162 #define BTRFS_LINK_MAX 65535U
164 /* 32 bytes in various csum fields */
165 #define BTRFS_CSUM_SIZE 32
168 #define BTRFS_CSUM_TYPE_CRC32 0
170 static int btrfs_csum_sizes
[] = { 4, 0 };
172 /* four bytes for CRC32 */
173 #define BTRFS_EMPTY_DIR_SIZE 0
175 #define BTRFS_FT_UNKNOWN 0
176 #define BTRFS_FT_REG_FILE 1
177 #define BTRFS_FT_DIR 2
178 #define BTRFS_FT_CHRDEV 3
179 #define BTRFS_FT_BLKDEV 4
180 #define BTRFS_FT_FIFO 5
181 #define BTRFS_FT_SOCK 6
182 #define BTRFS_FT_SYMLINK 7
183 #define BTRFS_FT_XATTR 8
184 #define BTRFS_FT_MAX 9
186 /* ioprio of readahead is set to idle */
187 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
190 * The key defines the order in the tree, and so it also defines (optimal)
193 * objectid corresponds to the inode number.
195 * type tells us things about the object, and is a kind of stream selector.
196 * so for a given inode, keys with type of 1 might refer to the inode data,
197 * type of 2 may point to file data in the btree and type == 3 may point to
200 * offset is the starting byte offset for this key in the stream.
202 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
203 * in cpu native order. Otherwise they are identical and their sizes
204 * should be the same (ie both packed)
206 struct btrfs_disk_key
{
210 } __attribute__ ((__packed__
));
216 } __attribute__ ((__packed__
));
218 struct btrfs_mapping_tree
{
219 struct extent_map_tree map_tree
;
222 struct btrfs_dev_item
{
223 /* the internal btrfs device id */
226 /* size of the device */
232 /* optimal io alignment for this device */
235 /* optimal io width for this device */
238 /* minimal io size for this device */
241 /* type and info about this device */
244 /* expected generation for this device */
248 * starting byte of this partition on the device,
249 * to allow for stripe alignment in the future
253 /* grouping information for allocation decisions */
256 /* seek speed 0-100 where 100 is fastest */
259 /* bandwidth 0-100 where 100 is fastest */
262 /* btrfs generated uuid for this device */
263 u8 uuid
[BTRFS_UUID_SIZE
];
265 /* uuid of FS who owns this device */
266 u8 fsid
[BTRFS_UUID_SIZE
];
267 } __attribute__ ((__packed__
));
269 struct btrfs_stripe
{
272 u8 dev_uuid
[BTRFS_UUID_SIZE
];
273 } __attribute__ ((__packed__
));
276 /* size of this chunk in bytes */
279 /* objectid of the root referencing this chunk */
285 /* optimal io alignment for this chunk */
288 /* optimal io width for this chunk */
291 /* minimal io size for this chunk */
294 /* 2^16 stripes is quite a lot, a second limit is the size of a single
299 /* sub stripes only matter for raid10 */
301 struct btrfs_stripe stripe
;
302 /* additional stripes go here */
303 } __attribute__ ((__packed__
));
305 #define BTRFS_FREE_SPACE_EXTENT 1
306 #define BTRFS_FREE_SPACE_BITMAP 2
308 struct btrfs_free_space_entry
{
312 } __attribute__ ((__packed__
));
314 struct btrfs_free_space_header
{
315 struct btrfs_disk_key location
;
319 } __attribute__ ((__packed__
));
321 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
323 BUG_ON(num_stripes
== 0);
324 return sizeof(struct btrfs_chunk
) +
325 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
328 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
329 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
335 /* Errors detected */
336 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
338 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
339 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
341 #define BTRFS_BACKREF_REV_MAX 256
342 #define BTRFS_BACKREF_REV_SHIFT 56
343 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
344 BTRFS_BACKREF_REV_SHIFT)
346 #define BTRFS_OLD_BACKREF_REV 0
347 #define BTRFS_MIXED_BACKREF_REV 1
350 * every tree block (leaf or node) starts with this header.
352 struct btrfs_header
{
353 /* these first four must match the super block */
354 u8 csum
[BTRFS_CSUM_SIZE
];
355 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
356 __le64 bytenr
; /* which block this node is supposed to live in */
359 /* allowed to be different from the super from here on down */
360 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
365 } __attribute__ ((__packed__
));
367 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
368 sizeof(struct btrfs_header)) / \
369 sizeof(struct btrfs_key_ptr))
370 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
371 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
372 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
373 sizeof(struct btrfs_item) - \
374 sizeof(struct btrfs_file_extent_item))
375 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
376 sizeof(struct btrfs_item) -\
377 sizeof(struct btrfs_dir_item))
381 * this is a very generous portion of the super block, giving us
382 * room to translate 14 chunks with 3 stripes each.
384 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
385 #define BTRFS_LABEL_SIZE 256
388 * just in case we somehow lose the roots and are not able to mount,
389 * we store an array of the roots from previous transactions
392 #define BTRFS_NUM_BACKUP_ROOTS 4
393 struct btrfs_root_backup
{
395 __le64 tree_root_gen
;
398 __le64 chunk_root_gen
;
401 __le64 extent_root_gen
;
410 __le64 csum_root_gen
;
420 u8 extent_root_level
;
424 /* future and to align */
426 } __attribute__ ((__packed__
));
429 * the super block basically lists the main trees of the FS
430 * it currently lacks any block count etc etc
432 struct btrfs_super_block
{
433 u8 csum
[BTRFS_CSUM_SIZE
];
434 /* the first 4 fields must match struct btrfs_header */
435 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
436 __le64 bytenr
; /* this block number */
439 /* allowed to be different from the btrfs_header from here own down */
446 /* this will help find the new super based on the log root */
447 __le64 log_root_transid
;
450 __le64 root_dir_objectid
;
456 __le32 sys_chunk_array_size
;
457 __le64 chunk_root_generation
;
459 __le64 compat_ro_flags
;
460 __le64 incompat_flags
;
465 struct btrfs_dev_item dev_item
;
467 char label
[BTRFS_LABEL_SIZE
];
469 __le64 cache_generation
;
471 /* future expansion */
473 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
474 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
475 } __attribute__ ((__packed__
));
478 * Compat flags that we support. If any incompat flags are set other than the
479 * ones specified below then we will fail to mount
481 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
482 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
486 * some patches floated around with a second compression method
487 * lets save that incompat here for when they do get in
488 * Note we don't actually support it, we're just reserving the
491 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
494 * older kernels tried to do bigger metadata blocks, but the
495 * code was pretty buggy. Lets not let them try anymore.
497 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
499 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
501 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
502 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
503 #define BTRFS_FEATURE_INCOMPAT_SUPP \
504 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
505 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
506 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
507 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
508 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
509 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
512 * A leaf is full of items. offset and size tell us where to find
513 * the item in the leaf (relative to the start of the data area)
516 struct btrfs_disk_key key
;
519 } __attribute__ ((__packed__
));
522 * leaves have an item area and a data area:
523 * [item0, item1....itemN] [free space] [dataN...data1, data0]
525 * The data is separate from the items to get the keys closer together
529 struct btrfs_header header
;
530 struct btrfs_item items
[];
531 } __attribute__ ((__packed__
));
534 * all non-leaf blocks are nodes, they hold only keys and pointers to
537 struct btrfs_key_ptr
{
538 struct btrfs_disk_key key
;
541 } __attribute__ ((__packed__
));
544 struct btrfs_header header
;
545 struct btrfs_key_ptr ptrs
[];
546 } __attribute__ ((__packed__
));
549 * btrfs_paths remember the path taken from the root down to the leaf.
550 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
551 * to any other levels that are present.
553 * The slots array records the index of the item or block pointer
554 * used while walking the tree.
557 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
558 int slots
[BTRFS_MAX_LEVEL
];
559 /* if there is real range locking, this locks field will change */
560 int locks
[BTRFS_MAX_LEVEL
];
562 /* keep some upper locks as we walk down */
566 * set by btrfs_split_item, tells search_slot to keep all locks
567 * and to force calls to keep space in the nodes
569 unsigned int search_for_split
:1;
570 unsigned int keep_locks
:1;
571 unsigned int skip_locking
:1;
572 unsigned int leave_spinning
:1;
573 unsigned int search_commit_root
:1;
577 * items in the extent btree are used to record the objectid of the
578 * owner of the block and the number of references
581 struct btrfs_extent_item
{
585 } __attribute__ ((__packed__
));
587 struct btrfs_extent_item_v0
{
589 } __attribute__ ((__packed__
));
591 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
592 sizeof(struct btrfs_item))
594 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
595 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
597 /* following flags only apply to tree blocks */
599 /* use full backrefs for extent pointers in the block */
600 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
603 * this flag is only used internally by scrub and may be changed at any time
604 * it is only declared here to avoid collisions
606 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
608 struct btrfs_tree_block_info
{
609 struct btrfs_disk_key key
;
611 } __attribute__ ((__packed__
));
613 struct btrfs_extent_data_ref
{
618 } __attribute__ ((__packed__
));
620 struct btrfs_shared_data_ref
{
622 } __attribute__ ((__packed__
));
624 struct btrfs_extent_inline_ref
{
627 } __attribute__ ((__packed__
));
629 /* old style backrefs item */
630 struct btrfs_extent_ref_v0
{
635 } __attribute__ ((__packed__
));
638 /* dev extents record free space on individual devices. The owner
639 * field points back to the chunk allocation mapping tree that allocated
640 * the extent. The chunk tree uuid field is a way to double check the owner
642 struct btrfs_dev_extent
{
644 __le64 chunk_objectid
;
647 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
648 } __attribute__ ((__packed__
));
650 struct btrfs_inode_ref
{
654 } __attribute__ ((__packed__
));
656 struct btrfs_inode_extref
{
657 __le64 parent_objectid
;
662 } __attribute__ ((__packed__
));
664 struct btrfs_timespec
{
667 } __attribute__ ((__packed__
));
669 enum btrfs_compression_type
{
670 BTRFS_COMPRESS_NONE
= 0,
671 BTRFS_COMPRESS_ZLIB
= 1,
672 BTRFS_COMPRESS_LZO
= 2,
673 BTRFS_COMPRESS_TYPES
= 2,
674 BTRFS_COMPRESS_LAST
= 3,
677 struct btrfs_inode_item
{
678 /* nfs style generation number */
680 /* transid that last touched this inode */
692 /* modification sequence number for NFS */
696 * a little future expansion, for more than this we can
697 * just grow the inode item and version it
700 struct btrfs_timespec atime
;
701 struct btrfs_timespec ctime
;
702 struct btrfs_timespec mtime
;
703 struct btrfs_timespec otime
;
704 } __attribute__ ((__packed__
));
706 struct btrfs_dir_log_item
{
708 } __attribute__ ((__packed__
));
710 struct btrfs_dir_item
{
711 struct btrfs_disk_key location
;
716 } __attribute__ ((__packed__
));
718 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
720 struct btrfs_root_item
{
721 struct btrfs_inode_item inode
;
727 __le64 last_snapshot
;
730 struct btrfs_disk_key drop_progress
;
735 * The following fields appear after subvol_uuids+subvol_times
740 * This generation number is used to test if the new fields are valid
741 * and up to date while reading the root item. Everytime the root item
742 * is written out, the "generation" field is copied into this field. If
743 * anyone ever mounted the fs with an older kernel, we will have
744 * mismatching generation values here and thus must invalidate the
745 * new fields. See btrfs_update_root and btrfs_find_last_root for
747 * the offset of generation_v2 is also used as the start for the memset
748 * when invalidating the fields.
750 __le64 generation_v2
;
751 u8 uuid
[BTRFS_UUID_SIZE
];
752 u8 parent_uuid
[BTRFS_UUID_SIZE
];
753 u8 received_uuid
[BTRFS_UUID_SIZE
];
754 __le64 ctransid
; /* updated when an inode changes */
755 __le64 otransid
; /* trans when created */
756 __le64 stransid
; /* trans when sent. non-zero for received subvol */
757 __le64 rtransid
; /* trans when received. non-zero for received subvol */
758 struct btrfs_timespec ctime
;
759 struct btrfs_timespec otime
;
760 struct btrfs_timespec stime
;
761 struct btrfs_timespec rtime
;
762 __le64 reserved
[8]; /* for future */
763 } __attribute__ ((__packed__
));
766 * this is used for both forward and backward root refs
768 struct btrfs_root_ref
{
772 } __attribute__ ((__packed__
));
774 struct btrfs_disk_balance_args
{
776 * profiles to operate on, single is denoted by
777 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
787 /* devid subset filter [pstart..pend) */
791 /* btrfs virtual address space subset filter [vstart..vend) */
796 * profile to convert to, single is denoted by
797 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
801 /* BTRFS_BALANCE_ARGS_* */
805 } __attribute__ ((__packed__
));
808 * store balance parameters to disk so that balance can be properly
809 * resumed after crash or unmount
811 struct btrfs_balance_item
{
812 /* BTRFS_BALANCE_* */
815 struct btrfs_disk_balance_args data
;
816 struct btrfs_disk_balance_args meta
;
817 struct btrfs_disk_balance_args sys
;
820 } __attribute__ ((__packed__
));
822 #define BTRFS_FILE_EXTENT_INLINE 0
823 #define BTRFS_FILE_EXTENT_REG 1
824 #define BTRFS_FILE_EXTENT_PREALLOC 2
826 struct btrfs_file_extent_item
{
828 * transaction id that created this extent
832 * max number of bytes to hold this extent in ram
833 * when we split a compressed extent we can't know how big
834 * each of the resulting pieces will be. So, this is
835 * an upper limit on the size of the extent in ram instead of
841 * 32 bits for the various ways we might encode the data,
842 * including compression and encryption. If any of these
843 * are set to something a given disk format doesn't understand
844 * it is treated like an incompat flag for reading and writing,
849 __le16 other_encoding
; /* spare for later use */
851 /* are we inline data or a real extent? */
855 * disk space consumed by the extent, checksum blocks are included
859 __le64 disk_num_bytes
;
861 * the logical offset in file blocks (no csums)
862 * this extent record is for. This allows a file extent to point
863 * into the middle of an existing extent on disk, sharing it
864 * between two snapshots (useful if some bytes in the middle of the
865 * extent have changed
869 * the logical number of file blocks (no csums included). This
870 * always reflects the size uncompressed and without encoding.
874 } __attribute__ ((__packed__
));
876 struct btrfs_csum_item
{
878 } __attribute__ ((__packed__
));
880 struct btrfs_dev_stats_item
{
882 * grow this item struct at the end for future enhancements and keep
883 * the existing values unchanged
885 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
886 } __attribute__ ((__packed__
));
888 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
889 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
890 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
891 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
892 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
893 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
894 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
896 struct btrfs_dev_replace
{
897 u64 replace_state
; /* see #define above */
898 u64 time_started
; /* seconds since 1-Jan-1970 */
899 u64 time_stopped
; /* seconds since 1-Jan-1970 */
900 atomic64_t num_write_errors
;
901 atomic64_t num_uncorrectable_read_errors
;
904 u64 committed_cursor_left
;
905 u64 cursor_left_last_write_of_item
;
908 u64 cont_reading_from_srcdev_mode
; /* see #define above */
911 int item_needs_writeback
;
912 struct btrfs_device
*srcdev
;
913 struct btrfs_device
*tgtdev
;
916 atomic_t nesting_level
;
917 struct mutex lock_finishing_cancel_unmount
;
918 struct mutex lock_management_lock
;
921 struct btrfs_scrub_progress scrub_progress
;
924 struct btrfs_dev_replace_item
{
926 * grow this item struct at the end for future enhancements and keep
927 * the existing values unchanged
932 __le64 cont_reading_from_srcdev_mode
;
934 __le64 replace_state
;
937 __le64 num_write_errors
;
938 __le64 num_uncorrectable_read_errors
;
939 } __attribute__ ((__packed__
));
941 /* different types of block groups (and chunks) */
942 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
943 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
944 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
945 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
946 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
947 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
948 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
949 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
950 #define BTRFS_NR_RAID_TYPES 5
952 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
953 BTRFS_BLOCK_GROUP_SYSTEM | \
954 BTRFS_BLOCK_GROUP_METADATA)
956 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
957 BTRFS_BLOCK_GROUP_RAID1 | \
958 BTRFS_BLOCK_GROUP_DUP | \
959 BTRFS_BLOCK_GROUP_RAID10)
961 * We need a bit for restriper to be able to tell when chunks of type
962 * SINGLE are available. This "extended" profile format is used in
963 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
964 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
965 * to avoid remappings between two formats in future.
967 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
969 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
970 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
972 static inline u64
chunk_to_extended(u64 flags
)
974 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
975 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
979 static inline u64
extended_to_chunk(u64 flags
)
981 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
984 struct btrfs_block_group_item
{
986 __le64 chunk_objectid
;
988 } __attribute__ ((__packed__
));
991 * is subvolume quota turned on?
993 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
995 * SCANNING is set during the initialization phase
997 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
999 * Some qgroup entries are known to be out of date,
1000 * either because the configuration has changed in a way that
1001 * makes a rescan necessary, or because the fs has been mounted
1002 * with a non-qgroup-aware version.
1003 * Turning qouta off and on again makes it inconsistent, too.
1005 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1007 #define BTRFS_QGROUP_STATUS_VERSION 1
1009 struct btrfs_qgroup_status_item
{
1012 * the generation is updated during every commit. As older
1013 * versions of btrfs are not aware of qgroups, it will be
1014 * possible to detect inconsistencies by checking the
1015 * generation on mount time
1019 /* flag definitions see above */
1023 * only used during scanning to record the progress
1024 * of the scan. It contains a logical address
1027 } __attribute__ ((__packed__
));
1029 struct btrfs_qgroup_info_item
{
1035 } __attribute__ ((__packed__
));
1037 /* flags definition for qgroup limits */
1038 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1039 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1040 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1041 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1042 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1043 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1045 struct btrfs_qgroup_limit_item
{
1047 * only updated when any of the other values change
1054 } __attribute__ ((__packed__
));
1056 struct btrfs_space_info
{
1059 u64 total_bytes
; /* total bytes in the space,
1060 this doesn't take mirrors into account */
1061 u64 bytes_used
; /* total bytes used,
1062 this doesn't take mirrors into account */
1063 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1064 transaction finishes */
1065 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1066 current allocations */
1067 u64 bytes_readonly
; /* total bytes that are read only */
1069 u64 bytes_may_use
; /* number of bytes that may be used for
1070 delalloc/allocations */
1071 u64 disk_used
; /* total bytes used on disk */
1072 u64 disk_total
; /* total bytes on disk, takes mirrors into
1076 * we bump reservation progress every time we decrement
1077 * bytes_reserved. This way people waiting for reservations
1078 * know something good has happened and they can check
1079 * for progress. The number here isn't to be trusted, it
1080 * just shows reclaim activity
1082 unsigned long reservation_progress
;
1084 unsigned int full
:1; /* indicates that we cannot allocate any more
1085 chunks for this space */
1086 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1088 unsigned int flush
:1; /* set if we are trying to make space */
1090 unsigned int force_alloc
; /* set if we need to force a chunk
1091 alloc for this space */
1093 struct list_head list
;
1095 /* for block groups in our same type */
1096 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1098 struct rw_semaphore groups_sem
;
1099 wait_queue_head_t wait
;
1102 #define BTRFS_BLOCK_RSV_GLOBAL 1
1103 #define BTRFS_BLOCK_RSV_DELALLOC 2
1104 #define BTRFS_BLOCK_RSV_TRANS 3
1105 #define BTRFS_BLOCK_RSV_CHUNK 4
1106 #define BTRFS_BLOCK_RSV_DELOPS 5
1107 #define BTRFS_BLOCK_RSV_EMPTY 6
1108 #define BTRFS_BLOCK_RSV_TEMP 7
1110 struct btrfs_block_rsv
{
1113 struct btrfs_space_info
*space_info
;
1115 unsigned short full
;
1116 unsigned short type
;
1117 unsigned short failfast
;
1121 * free clusters are used to claim free space in relatively large chunks,
1122 * allowing us to do less seeky writes. They are used for all metadata
1123 * allocations and data allocations in ssd mode.
1125 struct btrfs_free_cluster
{
1127 spinlock_t refill_lock
;
1128 struct rb_root root
;
1130 /* largest extent in this cluster */
1133 /* first extent starting offset */
1136 struct btrfs_block_group_cache
*block_group
;
1138 * when a cluster is allocated from a block group, we put the
1139 * cluster onto a list in the block group so that it can
1140 * be freed before the block group is freed.
1142 struct list_head block_group_list
;
1145 enum btrfs_caching_type
{
1147 BTRFS_CACHE_STARTED
= 1,
1148 BTRFS_CACHE_FAST
= 2,
1149 BTRFS_CACHE_FINISHED
= 3,
1152 enum btrfs_disk_cache_state
{
1153 BTRFS_DC_WRITTEN
= 0,
1157 BTRFS_DC_NEED_WRITE
= 4,
1160 struct btrfs_caching_control
{
1161 struct list_head list
;
1163 wait_queue_head_t wait
;
1164 struct btrfs_work work
;
1165 struct btrfs_block_group_cache
*block_group
;
1170 struct btrfs_block_group_cache
{
1171 struct btrfs_key key
;
1172 struct btrfs_block_group_item item
;
1173 struct btrfs_fs_info
*fs_info
;
1174 struct inode
*inode
;
1181 u64 cache_generation
;
1183 unsigned int dirty
:1;
1184 unsigned int iref
:1;
1186 int disk_cache_state
;
1188 /* cache tracking stuff */
1190 struct btrfs_caching_control
*caching_ctl
;
1191 u64 last_byte_to_unpin
;
1193 struct btrfs_space_info
*space_info
;
1195 /* free space cache stuff */
1196 struct btrfs_free_space_ctl
*free_space_ctl
;
1198 /* block group cache stuff */
1199 struct rb_node cache_node
;
1201 /* for block groups in the same raid type */
1202 struct list_head list
;
1207 /* List of struct btrfs_free_clusters for this block group.
1208 * Today it will only have one thing on it, but that may change
1210 struct list_head cluster_list
;
1212 /* For delayed block group creation */
1213 struct list_head new_bg_list
;
1216 /* delayed seq elem */
1218 struct list_head list
;
1223 struct reloc_control
;
1224 struct btrfs_device
;
1225 struct btrfs_fs_devices
;
1226 struct btrfs_balance_control
;
1227 struct btrfs_delayed_root
;
1228 struct btrfs_fs_info
{
1229 u8 fsid
[BTRFS_FSID_SIZE
];
1230 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1231 struct btrfs_root
*extent_root
;
1232 struct btrfs_root
*tree_root
;
1233 struct btrfs_root
*chunk_root
;
1234 struct btrfs_root
*dev_root
;
1235 struct btrfs_root
*fs_root
;
1236 struct btrfs_root
*csum_root
;
1237 struct btrfs_root
*quota_root
;
1239 /* the log root tree is a directory of all the other log roots */
1240 struct btrfs_root
*log_root_tree
;
1242 spinlock_t fs_roots_radix_lock
;
1243 struct radix_tree_root fs_roots_radix
;
1245 /* block group cache stuff */
1246 spinlock_t block_group_cache_lock
;
1247 struct rb_root block_group_cache_tree
;
1249 /* keep track of unallocated space */
1250 spinlock_t free_chunk_lock
;
1251 u64 free_chunk_space
;
1253 struct extent_io_tree freed_extents
[2];
1254 struct extent_io_tree
*pinned_extents
;
1256 /* logical->physical extent mapping */
1257 struct btrfs_mapping_tree mapping_tree
;
1260 * block reservation for extent, checksum, root tree and
1261 * delayed dir index item
1263 struct btrfs_block_rsv global_block_rsv
;
1264 /* block reservation for delay allocation */
1265 struct btrfs_block_rsv delalloc_block_rsv
;
1266 /* block reservation for metadata operations */
1267 struct btrfs_block_rsv trans_block_rsv
;
1268 /* block reservation for chunk tree */
1269 struct btrfs_block_rsv chunk_block_rsv
;
1270 /* block reservation for delayed operations */
1271 struct btrfs_block_rsv delayed_block_rsv
;
1273 struct btrfs_block_rsv empty_block_rsv
;
1276 u64 last_trans_committed
;
1279 * this is updated to the current trans every time a full commit
1280 * is required instead of the faster short fsync log commits
1282 u64 last_trans_log_full_commit
;
1283 unsigned long mount_opt
;
1284 unsigned long compress_type
:4;
1287 struct btrfs_transaction
*running_transaction
;
1288 wait_queue_head_t transaction_throttle
;
1289 wait_queue_head_t transaction_wait
;
1290 wait_queue_head_t transaction_blocked_wait
;
1291 wait_queue_head_t async_submit_wait
;
1293 struct btrfs_super_block
*super_copy
;
1294 struct btrfs_super_block
*super_for_commit
;
1295 struct block_device
*__bdev
;
1296 struct super_block
*sb
;
1297 struct inode
*btree_inode
;
1298 struct backing_dev_info bdi
;
1299 struct mutex tree_log_mutex
;
1300 struct mutex transaction_kthread_mutex
;
1301 struct mutex cleaner_mutex
;
1302 struct mutex chunk_mutex
;
1303 struct mutex volume_mutex
;
1305 * this protects the ordered operations list only while we are
1306 * processing all of the entries on it. This way we make
1307 * sure the commit code doesn't find the list temporarily empty
1308 * because another function happens to be doing non-waiting preflush
1309 * before jumping into the main commit.
1311 struct mutex ordered_operations_mutex
;
1312 struct rw_semaphore extent_commit_sem
;
1314 struct rw_semaphore cleanup_work_sem
;
1316 struct rw_semaphore subvol_sem
;
1317 struct srcu_struct subvol_srcu
;
1319 spinlock_t trans_lock
;
1321 * the reloc mutex goes with the trans lock, it is taken
1322 * during commit to protect us from the relocation code
1324 struct mutex reloc_mutex
;
1326 struct list_head trans_list
;
1327 struct list_head dead_roots
;
1328 struct list_head caching_block_groups
;
1330 spinlock_t delayed_iput_lock
;
1331 struct list_head delayed_iputs
;
1333 /* this protects tree_mod_seq_list */
1334 spinlock_t tree_mod_seq_lock
;
1335 atomic_t tree_mod_seq
;
1336 struct list_head tree_mod_seq_list
;
1337 struct seq_list tree_mod_seq_elem
;
1339 /* this protects tree_mod_log */
1340 rwlock_t tree_mod_log_lock
;
1341 struct rb_root tree_mod_log
;
1343 atomic_t nr_async_submits
;
1344 atomic_t async_submit_draining
;
1345 atomic_t nr_async_bios
;
1346 atomic_t async_delalloc_pages
;
1347 atomic_t open_ioctl_trans
;
1350 * this is used by the balancing code to wait for all the pending
1353 spinlock_t ordered_extent_lock
;
1356 * all of the data=ordered extents pending writeback
1357 * these can span multiple transactions and basically include
1358 * every dirty data page that isn't from nodatacow
1360 struct list_head ordered_extents
;
1363 * all of the inodes that have delalloc bytes. It is possible for
1364 * this list to be empty even when there is still dirty data=ordered
1365 * extents waiting to finish IO.
1367 struct list_head delalloc_inodes
;
1370 * special rename and truncate targets that must be on disk before
1371 * we're allowed to commit. This is basically the ext3 style
1372 * data=ordered list.
1374 struct list_head ordered_operations
;
1377 * there is a pool of worker threads for checksumming during writes
1378 * and a pool for checksumming after reads. This is because readers
1379 * can run with FS locks held, and the writers may be waiting for
1380 * those locks. We don't want ordering in the pending list to cause
1381 * deadlocks, and so the two are serviced separately.
1383 * A third pool does submit_bio to avoid deadlocking with the other
1386 struct btrfs_workers generic_worker
;
1387 struct btrfs_workers workers
;
1388 struct btrfs_workers delalloc_workers
;
1389 struct btrfs_workers flush_workers
;
1390 struct btrfs_workers endio_workers
;
1391 struct btrfs_workers endio_meta_workers
;
1392 struct btrfs_workers endio_meta_write_workers
;
1393 struct btrfs_workers endio_write_workers
;
1394 struct btrfs_workers endio_freespace_worker
;
1395 struct btrfs_workers submit_workers
;
1396 struct btrfs_workers caching_workers
;
1397 struct btrfs_workers readahead_workers
;
1400 * fixup workers take dirty pages that didn't properly go through
1401 * the cow mechanism and make them safe to write. It happens
1402 * for the sys_munmap function call path
1404 struct btrfs_workers fixup_workers
;
1405 struct btrfs_workers delayed_workers
;
1406 struct task_struct
*transaction_kthread
;
1407 struct task_struct
*cleaner_kthread
;
1408 int thread_pool_size
;
1410 struct kobject super_kobj
;
1411 struct completion kobj_unregister
;
1414 int log_root_recovering
;
1420 /* protected by the delalloc lock, used to keep from writing
1421 * metadata until there is a nice batch
1423 u64 dirty_metadata_bytes
;
1424 struct list_head dirty_cowonly_roots
;
1426 struct btrfs_fs_devices
*fs_devices
;
1429 * the space_info list is almost entirely read only. It only changes
1430 * when we add a new raid type to the FS, and that happens
1431 * very rarely. RCU is used to protect it.
1433 struct list_head space_info
;
1435 struct btrfs_space_info
*data_sinfo
;
1437 struct reloc_control
*reloc_ctl
;
1439 spinlock_t delalloc_lock
;
1442 /* data_alloc_cluster is only used in ssd mode */
1443 struct btrfs_free_cluster data_alloc_cluster
;
1445 /* all metadata allocations go through this cluster */
1446 struct btrfs_free_cluster meta_alloc_cluster
;
1448 /* auto defrag inodes go here */
1449 spinlock_t defrag_inodes_lock
;
1450 struct rb_root defrag_inodes
;
1451 atomic_t defrag_running
;
1454 * these three are in extended format (availability of single
1455 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1456 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1458 u64 avail_data_alloc_bits
;
1459 u64 avail_metadata_alloc_bits
;
1460 u64 avail_system_alloc_bits
;
1462 /* restriper state */
1463 spinlock_t balance_lock
;
1464 struct mutex balance_mutex
;
1465 atomic_t balance_running
;
1466 atomic_t balance_pause_req
;
1467 atomic_t balance_cancel_req
;
1468 struct btrfs_balance_control
*balance_ctl
;
1469 wait_queue_head_t balance_wait_q
;
1471 unsigned data_chunk_allocations
;
1472 unsigned metadata_ratio
;
1476 /* private scrub information */
1477 struct mutex scrub_lock
;
1478 atomic_t scrubs_running
;
1479 atomic_t scrub_pause_req
;
1480 atomic_t scrubs_paused
;
1481 atomic_t scrub_cancel_req
;
1482 wait_queue_head_t scrub_pause_wait
;
1483 struct rw_semaphore scrub_super_lock
;
1484 int scrub_workers_refcnt
;
1485 struct btrfs_workers scrub_workers
;
1487 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1488 u32 check_integrity_print_mask
;
1493 unsigned int quota_enabled
:1;
1496 * quota_enabled only changes state after a commit. This holds the
1499 unsigned int pending_quota_state
:1;
1501 /* is qgroup tracking in a consistent state? */
1504 /* holds configuration and tracking. Protected by qgroup_lock */
1505 struct rb_root qgroup_tree
;
1506 spinlock_t qgroup_lock
;
1508 /* list of dirty qgroups to be written at next commit */
1509 struct list_head dirty_qgroups
;
1511 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1514 /* filesystem state */
1517 struct btrfs_delayed_root
*delayed_root
;
1519 /* readahead tree */
1520 spinlock_t reada_lock
;
1521 struct radix_tree_root reada_tree
;
1523 /* next backup root to be overwritten */
1524 int backup_root_index
;
1526 int num_tolerated_disk_barrier_failures
;
1528 /* device replace state */
1529 struct btrfs_dev_replace dev_replace
;
1531 atomic_t mutually_exclusive_operation_running
;
1535 * in ram representation of the tree. extent_root is used for all allocations
1536 * and for the extent tree extent_root root.
1539 struct extent_buffer
*node
;
1541 struct extent_buffer
*commit_root
;
1542 struct btrfs_root
*log_root
;
1543 struct btrfs_root
*reloc_root
;
1545 struct btrfs_root_item root_item
;
1546 struct btrfs_key root_key
;
1547 struct btrfs_fs_info
*fs_info
;
1548 struct extent_io_tree dirty_log_pages
;
1550 struct kobject root_kobj
;
1551 struct completion kobj_unregister
;
1552 struct mutex objectid_mutex
;
1554 spinlock_t accounting_lock
;
1555 struct btrfs_block_rsv
*block_rsv
;
1557 /* free ino cache stuff */
1558 struct mutex fs_commit_mutex
;
1559 struct btrfs_free_space_ctl
*free_ino_ctl
;
1560 enum btrfs_caching_type cached
;
1561 spinlock_t cache_lock
;
1562 wait_queue_head_t cache_wait
;
1563 struct btrfs_free_space_ctl
*free_ino_pinned
;
1565 struct inode
*cache_inode
;
1567 struct mutex log_mutex
;
1568 wait_queue_head_t log_writer_wait
;
1569 wait_queue_head_t log_commit_wait
[2];
1570 atomic_t log_writers
;
1571 atomic_t log_commit
[2];
1573 unsigned long log_transid
;
1574 unsigned long last_log_commit
;
1575 pid_t log_start_pid
;
1576 bool log_multiple_pids
;
1581 /* data allocations are done in sectorsize units */
1584 /* node allocations are done in nodesize units */
1587 /* leaf allocations are done in leafsize units */
1594 u64 highest_objectid
;
1596 /* btrfs_record_root_in_trans is a multi-step process,
1597 * and it can race with the balancing code. But the
1598 * race is very small, and only the first time the root
1599 * is added to each transaction. So in_trans_setup
1600 * is used to tell us when more checks are required
1602 unsigned long in_trans_setup
;
1607 u64 defrag_trans_start
;
1608 struct btrfs_key defrag_progress
;
1609 struct btrfs_key defrag_max
;
1613 /* the dirty list is only used by non-reference counted roots */
1614 struct list_head dirty_list
;
1616 struct list_head root_list
;
1618 spinlock_t orphan_lock
;
1619 atomic_t orphan_inodes
;
1620 struct btrfs_block_rsv
*orphan_block_rsv
;
1621 int orphan_item_inserted
;
1622 int orphan_cleanup_state
;
1624 spinlock_t inode_lock
;
1625 /* red-black tree that keeps track of in-memory inodes */
1626 struct rb_root inode_tree
;
1629 * radix tree that keeps track of delayed nodes of every inode,
1630 * protected by inode_lock
1632 struct radix_tree_root delayed_nodes_tree
;
1634 * right now this just gets used so that a root has its own devid
1635 * for stat. It may be used for more later
1641 spinlock_t root_times_lock
;
1644 struct btrfs_ioctl_defrag_range_args
{
1645 /* start of the defrag operation */
1648 /* number of bytes to defrag, use (u64)-1 to say all */
1652 * flags for the operation, which can include turning
1653 * on compression for this one defrag
1658 * any extent bigger than this will be considered
1659 * already defragged. Use 0 to take the kernel default
1660 * Use 1 to say every single extent must be rewritten
1662 __u32 extent_thresh
;
1665 * which compression method to use if turning on compression
1666 * for this defrag operation. If unspecified, zlib will
1669 __u32 compress_type
;
1671 /* spare for later */
1677 * inode items have the data typically returned from stat and store other
1678 * info about object characteristics. There is one for every file and dir in
1681 #define BTRFS_INODE_ITEM_KEY 1
1682 #define BTRFS_INODE_REF_KEY 12
1683 #define BTRFS_INODE_EXTREF_KEY 13
1684 #define BTRFS_XATTR_ITEM_KEY 24
1685 #define BTRFS_ORPHAN_ITEM_KEY 48
1686 /* reserve 2-15 close to the inode for later flexibility */
1689 * dir items are the name -> inode pointers in a directory. There is one
1690 * for every name in a directory.
1692 #define BTRFS_DIR_LOG_ITEM_KEY 60
1693 #define BTRFS_DIR_LOG_INDEX_KEY 72
1694 #define BTRFS_DIR_ITEM_KEY 84
1695 #define BTRFS_DIR_INDEX_KEY 96
1697 * extent data is for file data
1699 #define BTRFS_EXTENT_DATA_KEY 108
1702 * extent csums are stored in a separate tree and hold csums for
1703 * an entire extent on disk.
1705 #define BTRFS_EXTENT_CSUM_KEY 128
1708 * root items point to tree roots. They are typically in the root
1709 * tree used by the super block to find all the other trees
1711 #define BTRFS_ROOT_ITEM_KEY 132
1714 * root backrefs tie subvols and snapshots to the directory entries that
1717 #define BTRFS_ROOT_BACKREF_KEY 144
1720 * root refs make a fast index for listing all of the snapshots and
1721 * subvolumes referenced by a given root. They point directly to the
1722 * directory item in the root that references the subvol
1724 #define BTRFS_ROOT_REF_KEY 156
1727 * extent items are in the extent map tree. These record which blocks
1728 * are used, and how many references there are to each block
1730 #define BTRFS_EXTENT_ITEM_KEY 168
1732 #define BTRFS_TREE_BLOCK_REF_KEY 176
1734 #define BTRFS_EXTENT_DATA_REF_KEY 178
1736 #define BTRFS_EXTENT_REF_V0_KEY 180
1738 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1740 #define BTRFS_SHARED_DATA_REF_KEY 184
1743 * block groups give us hints into the extent allocation trees. Which
1744 * blocks are free etc etc
1746 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1748 #define BTRFS_DEV_EXTENT_KEY 204
1749 #define BTRFS_DEV_ITEM_KEY 216
1750 #define BTRFS_CHUNK_ITEM_KEY 228
1753 * Records the overall state of the qgroups.
1754 * There's only one instance of this key present,
1755 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1757 #define BTRFS_QGROUP_STATUS_KEY 240
1759 * Records the currently used space of the qgroup.
1760 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1762 #define BTRFS_QGROUP_INFO_KEY 242
1764 * Contains the user configured limits for the qgroup.
1765 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1767 #define BTRFS_QGROUP_LIMIT_KEY 244
1769 * Records the child-parent relationship of qgroups. For
1770 * each relation, 2 keys are present:
1771 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1772 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1774 #define BTRFS_QGROUP_RELATION_KEY 246
1776 #define BTRFS_BALANCE_ITEM_KEY 248
1779 * Persistantly stores the io stats in the device tree.
1780 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1782 #define BTRFS_DEV_STATS_KEY 249
1785 * Persistantly stores the device replace state in the device tree.
1786 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1788 #define BTRFS_DEV_REPLACE_KEY 250
1791 * string items are for debugging. They just store a short string of
1794 #define BTRFS_STRING_ITEM_KEY 253
1797 * Flags for mount options.
1799 * Note: don't forget to add new options to btrfs_show_options()
1801 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1802 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1803 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1804 #define BTRFS_MOUNT_SSD (1 << 3)
1805 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1806 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1807 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1808 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1809 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1810 #define BTRFS_MOUNT_NOSSD (1 << 9)
1811 #define BTRFS_MOUNT_DISCARD (1 << 10)
1812 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1813 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1814 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1815 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1816 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1817 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1818 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1819 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1820 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1821 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1822 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1823 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1825 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1826 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1827 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1832 #define BTRFS_INODE_NODATASUM (1 << 0)
1833 #define BTRFS_INODE_NODATACOW (1 << 1)
1834 #define BTRFS_INODE_READONLY (1 << 2)
1835 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1836 #define BTRFS_INODE_PREALLOC (1 << 4)
1837 #define BTRFS_INODE_SYNC (1 << 5)
1838 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1839 #define BTRFS_INODE_APPEND (1 << 7)
1840 #define BTRFS_INODE_NODUMP (1 << 8)
1841 #define BTRFS_INODE_NOATIME (1 << 9)
1842 #define BTRFS_INODE_DIRSYNC (1 << 10)
1843 #define BTRFS_INODE_COMPRESS (1 << 11)
1845 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1847 struct btrfs_map_token
{
1848 struct extent_buffer
*eb
;
1850 unsigned long offset
;
1853 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1855 memset(token
, 0, sizeof(*token
));
1858 /* some macros to generate set/get funcs for the struct fields. This
1859 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1862 #define le8_to_cpu(v) (v)
1863 #define cpu_to_le8(v) (v)
1866 #define read_eb_member(eb, ptr, type, member, result) ( \
1867 read_extent_buffer(eb, (char *)(result), \
1868 ((unsigned long)(ptr)) + \
1869 offsetof(type, member), \
1870 sizeof(((type *)0)->member)))
1872 #define write_eb_member(eb, ptr, type, member, result) ( \
1873 write_extent_buffer(eb, (char *)(result), \
1874 ((unsigned long)(ptr)) + \
1875 offsetof(type, member), \
1876 sizeof(((type *)0)->member)))
1878 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1879 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1880 unsigned long off, \
1881 struct btrfs_map_token *token); \
1882 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1883 unsigned long off, u##bits val, \
1884 struct btrfs_map_token *token); \
1885 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1886 unsigned long off) \
1888 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1890 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1891 unsigned long off, u##bits val) \
1893 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1896 DECLARE_BTRFS_SETGET_BITS(8)
1897 DECLARE_BTRFS_SETGET_BITS(16)
1898 DECLARE_BTRFS_SETGET_BITS(32)
1899 DECLARE_BTRFS_SETGET_BITS(64)
1901 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1902 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1904 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1905 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1907 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1910 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1911 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1913 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1914 struct btrfs_map_token *token) \
1916 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1917 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1919 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1920 type *s, u##bits val, \
1921 struct btrfs_map_token *token) \
1923 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1924 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1927 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1928 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1930 type *p = page_address(eb->pages[0]); \
1931 u##bits res = le##bits##_to_cpu(p->member); \
1934 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1937 type *p = page_address(eb->pages[0]); \
1938 p->member = cpu_to_le##bits(val); \
1941 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1942 static inline u##bits btrfs_##name(type *s) \
1944 return le##bits##_to_cpu(s->member); \
1946 static inline void btrfs_set_##name(type *s, u##bits val) \
1948 s->member = cpu_to_le##bits(val); \
1951 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1952 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1953 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1954 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1955 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1956 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1958 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1959 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1960 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1961 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1962 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1963 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1965 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1966 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1968 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1970 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1972 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1974 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1976 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1977 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1979 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1981 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1983 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1986 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1988 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1991 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1993 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1996 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1997 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1998 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1999 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2000 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2001 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2002 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2003 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2004 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2005 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2006 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2008 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2010 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2013 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2014 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2015 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2017 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2019 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2021 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2023 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2024 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2026 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2028 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2029 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2031 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2034 unsigned long offset
= (unsigned long)c
;
2035 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2036 offset
+= nr
* sizeof(struct btrfs_stripe
);
2037 return (struct btrfs_stripe
*)offset
;
2040 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2042 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2045 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2046 struct btrfs_chunk
*c
, int nr
)
2048 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2051 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2052 struct btrfs_chunk
*c
, int nr
)
2054 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2057 /* struct btrfs_block_group_item */
2058 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2060 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2062 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2063 struct btrfs_block_group_item
, chunk_objectid
, 64);
2065 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2066 struct btrfs_block_group_item
, chunk_objectid
, 64);
2067 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2068 struct btrfs_block_group_item
, flags
, 64);
2069 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2070 struct btrfs_block_group_item
, flags
, 64);
2072 /* struct btrfs_inode_ref */
2073 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2074 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2076 /* struct btrfs_inode_extref */
2077 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2078 parent_objectid
, 64);
2079 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2081 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2083 /* struct btrfs_inode_item */
2084 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2085 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2086 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2087 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2088 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2089 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2090 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2091 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2092 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2093 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2094 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2095 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2097 static inline struct btrfs_timespec
*
2098 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2100 unsigned long ptr
= (unsigned long)inode_item
;
2101 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2102 return (struct btrfs_timespec
*)ptr
;
2105 static inline struct btrfs_timespec
*
2106 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2108 unsigned long ptr
= (unsigned long)inode_item
;
2109 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2110 return (struct btrfs_timespec
*)ptr
;
2113 static inline struct btrfs_timespec
*
2114 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2116 unsigned long ptr
= (unsigned long)inode_item
;
2117 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2118 return (struct btrfs_timespec
*)ptr
;
2121 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2122 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2124 /* struct btrfs_dev_extent */
2125 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2127 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2128 chunk_objectid
, 64);
2129 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2131 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2133 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2135 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2136 return (u8
*)((unsigned long)dev
+ ptr
);
2139 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2140 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2142 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2144 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2147 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2149 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2150 struct btrfs_tree_block_info
*item
,
2151 struct btrfs_disk_key
*key
)
2153 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2156 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2157 struct btrfs_tree_block_info
*item
,
2158 struct btrfs_disk_key
*key
)
2160 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2163 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2165 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2167 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2169 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2172 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2175 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2177 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2180 static inline u32
btrfs_extent_inline_ref_size(int type
)
2182 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2183 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2184 return sizeof(struct btrfs_extent_inline_ref
);
2185 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2186 return sizeof(struct btrfs_shared_data_ref
) +
2187 sizeof(struct btrfs_extent_inline_ref
);
2188 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2189 return sizeof(struct btrfs_extent_data_ref
) +
2190 offsetof(struct btrfs_extent_inline_ref
, offset
);
2195 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2196 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2198 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2199 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2201 /* struct btrfs_node */
2202 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2203 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2205 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2208 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2209 sizeof(struct btrfs_key_ptr
) * nr
;
2210 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2213 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2217 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2218 sizeof(struct btrfs_key_ptr
) * nr
;
2219 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2222 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2225 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2226 sizeof(struct btrfs_key_ptr
) * nr
;
2227 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2230 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2234 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2235 sizeof(struct btrfs_key_ptr
) * nr
;
2236 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2239 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2241 return offsetof(struct btrfs_node
, ptrs
) +
2242 sizeof(struct btrfs_key_ptr
) * nr
;
2245 void btrfs_node_key(struct extent_buffer
*eb
,
2246 struct btrfs_disk_key
*disk_key
, int nr
);
2248 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2249 struct btrfs_disk_key
*disk_key
, int nr
)
2252 ptr
= btrfs_node_key_ptr_offset(nr
);
2253 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2254 struct btrfs_key_ptr
, key
, disk_key
);
2257 /* struct btrfs_item */
2258 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2259 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2261 static inline unsigned long btrfs_item_nr_offset(int nr
)
2263 return offsetof(struct btrfs_leaf
, items
) +
2264 sizeof(struct btrfs_item
) * nr
;
2267 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2270 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2273 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2274 struct btrfs_item
*item
)
2276 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2279 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2281 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2284 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2286 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2289 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2291 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2294 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2295 struct btrfs_disk_key
*disk_key
, int nr
)
2297 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2298 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2301 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2302 struct btrfs_disk_key
*disk_key
, int nr
)
2304 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2305 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2308 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2311 * struct btrfs_root_ref
2313 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2314 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2315 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2317 /* struct btrfs_dir_item */
2318 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2319 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2320 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2321 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2323 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2324 struct btrfs_dir_item
*item
,
2325 struct btrfs_disk_key
*key
)
2327 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2330 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2331 struct btrfs_dir_item
*item
,
2332 struct btrfs_disk_key
*key
)
2334 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2337 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2339 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2341 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2344 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2345 struct btrfs_free_space_header
*h
,
2346 struct btrfs_disk_key
*key
)
2348 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2351 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2352 struct btrfs_free_space_header
*h
,
2353 struct btrfs_disk_key
*key
)
2355 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2358 /* struct btrfs_disk_key */
2359 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2361 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2362 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2364 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2365 struct btrfs_disk_key
*disk
)
2367 cpu
->offset
= le64_to_cpu(disk
->offset
);
2368 cpu
->type
= disk
->type
;
2369 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2372 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2373 struct btrfs_key
*cpu
)
2375 disk
->offset
= cpu_to_le64(cpu
->offset
);
2376 disk
->type
= cpu
->type
;
2377 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2380 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2381 struct btrfs_key
*key
, int nr
)
2383 struct btrfs_disk_key disk_key
;
2384 btrfs_node_key(eb
, &disk_key
, nr
);
2385 btrfs_disk_key_to_cpu(key
, &disk_key
);
2388 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2389 struct btrfs_key
*key
, int nr
)
2391 struct btrfs_disk_key disk_key
;
2392 btrfs_item_key(eb
, &disk_key
, nr
);
2393 btrfs_disk_key_to_cpu(key
, &disk_key
);
2396 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2397 struct btrfs_dir_item
*item
,
2398 struct btrfs_key
*key
)
2400 struct btrfs_disk_key disk_key
;
2401 btrfs_dir_item_key(eb
, item
, &disk_key
);
2402 btrfs_disk_key_to_cpu(key
, &disk_key
);
2406 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2411 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2416 /* struct btrfs_header */
2417 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2418 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2420 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2421 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2422 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2423 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2425 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2427 return (btrfs_header_flags(eb
) & flag
) == flag
;
2430 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2432 u64 flags
= btrfs_header_flags(eb
);
2433 btrfs_set_header_flags(eb
, flags
| flag
);
2434 return (flags
& flag
) == flag
;
2437 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2439 u64 flags
= btrfs_header_flags(eb
);
2440 btrfs_set_header_flags(eb
, flags
& ~flag
);
2441 return (flags
& flag
) == flag
;
2444 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2446 u64 flags
= btrfs_header_flags(eb
);
2447 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2450 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2453 u64 flags
= btrfs_header_flags(eb
);
2454 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2455 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2456 btrfs_set_header_flags(eb
, flags
);
2459 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2461 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2465 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2467 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2471 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2473 return btrfs_header_level(eb
) == 0;
2476 /* struct btrfs_root_item */
2477 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2479 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2480 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2481 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2483 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2485 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2486 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2487 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2488 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2489 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2490 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2491 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2492 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2494 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2496 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2498 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2500 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2502 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2505 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2507 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2510 /* struct btrfs_root_backup */
2511 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2513 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2515 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2516 tree_root_level
, 8);
2518 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2520 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2521 chunk_root_gen
, 64);
2522 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2523 chunk_root_level
, 8);
2525 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2527 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2528 extent_root_gen
, 64);
2529 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2530 extent_root_level
, 8);
2532 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2534 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2536 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2539 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2541 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2543 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2546 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2548 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2550 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2551 csum_root_level
, 8);
2552 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2554 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2556 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2559 /* struct btrfs_balance_item */
2560 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2562 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2563 struct btrfs_balance_item
*bi
,
2564 struct btrfs_disk_balance_args
*ba
)
2566 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2569 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2570 struct btrfs_balance_item
*bi
,
2571 struct btrfs_disk_balance_args
*ba
)
2573 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2576 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2577 struct btrfs_balance_item
*bi
,
2578 struct btrfs_disk_balance_args
*ba
)
2580 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2583 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2584 struct btrfs_balance_item
*bi
,
2585 struct btrfs_disk_balance_args
*ba
)
2587 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2590 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2591 struct btrfs_balance_item
*bi
,
2592 struct btrfs_disk_balance_args
*ba
)
2594 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2597 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2598 struct btrfs_balance_item
*bi
,
2599 struct btrfs_disk_balance_args
*ba
)
2601 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2605 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2606 struct btrfs_disk_balance_args
*disk
)
2608 memset(cpu
, 0, sizeof(*cpu
));
2610 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2611 cpu
->usage
= le64_to_cpu(disk
->usage
);
2612 cpu
->devid
= le64_to_cpu(disk
->devid
);
2613 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2614 cpu
->pend
= le64_to_cpu(disk
->pend
);
2615 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2616 cpu
->vend
= le64_to_cpu(disk
->vend
);
2617 cpu
->target
= le64_to_cpu(disk
->target
);
2618 cpu
->flags
= le64_to_cpu(disk
->flags
);
2622 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2623 struct btrfs_balance_args
*cpu
)
2625 memset(disk
, 0, sizeof(*disk
));
2627 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2628 disk
->usage
= cpu_to_le64(cpu
->usage
);
2629 disk
->devid
= cpu_to_le64(cpu
->devid
);
2630 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2631 disk
->pend
= cpu_to_le64(cpu
->pend
);
2632 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2633 disk
->vend
= cpu_to_le64(cpu
->vend
);
2634 disk
->target
= cpu_to_le64(cpu
->target
);
2635 disk
->flags
= cpu_to_le64(cpu
->flags
);
2638 /* struct btrfs_super_block */
2639 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2640 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2641 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2643 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2644 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2645 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2646 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2647 struct btrfs_super_block
, chunk_root_generation
, 64);
2648 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2650 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2652 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2653 chunk_root_level
, 8);
2654 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2656 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2657 log_root_transid
, 64);
2658 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2660 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2662 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2664 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2666 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2668 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2670 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2672 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2673 root_dir_objectid
, 64);
2674 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2676 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2678 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2679 compat_ro_flags
, 64);
2680 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2681 incompat_flags
, 64);
2682 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2684 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2685 cache_generation
, 64);
2687 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2689 int t
= btrfs_super_csum_type(s
);
2690 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2691 return btrfs_csum_sizes
[t
];
2694 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2696 return offsetof(struct btrfs_leaf
, items
);
2699 /* struct btrfs_file_extent_item */
2700 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2702 static inline unsigned long
2703 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2705 unsigned long offset
= (unsigned long)e
;
2706 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2710 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2712 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2715 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2717 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2719 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2720 disk_num_bytes
, 64);
2721 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2723 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2725 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2727 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2729 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2731 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2732 other_encoding
, 16);
2734 /* this returns the number of file bytes represented by the inline item.
2735 * If an item is compressed, this is the uncompressed size
2737 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2738 struct btrfs_file_extent_item
*e
)
2740 return btrfs_file_extent_ram_bytes(eb
, e
);
2744 * this returns the number of bytes used by the item on disk, minus the
2745 * size of any extent headers. If a file is compressed on disk, this is
2746 * the compressed size
2748 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2749 struct btrfs_item
*e
)
2751 unsigned long offset
;
2752 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2753 return btrfs_item_size(eb
, e
) - offset
;
2756 /* btrfs_dev_stats_item */
2757 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2758 struct btrfs_dev_stats_item
*ptr
,
2763 read_extent_buffer(eb
, &val
,
2764 offsetof(struct btrfs_dev_stats_item
, values
) +
2765 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2770 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2771 struct btrfs_dev_stats_item
*ptr
,
2774 write_extent_buffer(eb
, &val
,
2775 offsetof(struct btrfs_dev_stats_item
, values
) +
2776 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2780 /* btrfs_qgroup_status_item */
2781 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2783 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2785 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2787 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2790 /* btrfs_qgroup_info_item */
2791 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2793 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2794 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2796 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2797 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2800 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2801 struct btrfs_qgroup_info_item
, generation
, 64);
2802 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2804 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2805 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2806 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2808 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2809 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2811 /* btrfs_qgroup_limit_item */
2812 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2814 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2816 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2818 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2820 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2823 /* btrfs_dev_replace_item */
2824 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2825 struct btrfs_dev_replace_item
, src_devid
, 64);
2826 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2827 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2829 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2831 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2833 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2835 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2836 num_write_errors
, 64);
2837 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2838 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2840 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2842 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2845 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2846 struct btrfs_dev_replace_item
, src_devid
, 64);
2847 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2848 struct btrfs_dev_replace_item
,
2849 cont_reading_from_srcdev_mode
, 64);
2850 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2851 struct btrfs_dev_replace_item
, replace_state
, 64);
2852 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2853 struct btrfs_dev_replace_item
, time_started
, 64);
2854 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2855 struct btrfs_dev_replace_item
, time_stopped
, 64);
2856 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2857 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2858 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2859 struct btrfs_dev_replace_item
,
2860 num_uncorrectable_read_errors
, 64);
2861 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2862 struct btrfs_dev_replace_item
, cursor_left
, 64);
2863 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2864 struct btrfs_dev_replace_item
, cursor_right
, 64);
2866 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2868 return sb
->s_fs_info
;
2871 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2874 return root
->leafsize
;
2875 return root
->nodesize
;
2878 /* helper function to cast into the data area of the leaf. */
2879 #define btrfs_item_ptr(leaf, slot, type) \
2880 ((type *)(btrfs_leaf_data(leaf) + \
2881 btrfs_item_offset_nr(leaf, slot)))
2883 #define btrfs_item_ptr_offset(leaf, slot) \
2884 ((unsigned long)(btrfs_leaf_data(leaf) + \
2885 btrfs_item_offset_nr(leaf, slot)))
2887 static inline struct dentry
*fdentry(struct file
*file
)
2889 return file
->f_path
.dentry
;
2892 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2894 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2895 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2898 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2900 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2904 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2907 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2912 * Doing a truncate won't result in new nodes or leaves, just what we need for
2915 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2918 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2922 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2923 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2924 struct btrfs_root
*root
, unsigned long count
);
2925 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2926 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2927 struct btrfs_root
*root
, u64 bytenr
,
2928 u64 num_bytes
, u64
*refs
, u64
*flags
);
2929 int btrfs_pin_extent(struct btrfs_root
*root
,
2930 u64 bytenr
, u64 num
, int reserved
);
2931 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2932 struct btrfs_root
*root
,
2933 u64 bytenr
, u64 num_bytes
);
2934 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2935 struct btrfs_root
*root
,
2936 u64 objectid
, u64 offset
, u64 bytenr
);
2937 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2938 struct btrfs_fs_info
*info
,
2940 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2941 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2942 u64 search_start
, u64 search_hint
, int owner
);
2943 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2944 struct btrfs_root
*root
, u32 blocksize
,
2945 u64 parent
, u64 root_objectid
,
2946 struct btrfs_disk_key
*key
, int level
,
2947 u64 hint
, u64 empty_size
);
2948 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2949 struct btrfs_root
*root
,
2950 struct extent_buffer
*buf
,
2951 u64 parent
, int last_ref
);
2952 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2953 struct btrfs_root
*root
,
2954 u64 bytenr
, u32 blocksize
,
2956 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2957 struct btrfs_root
*root
,
2958 u64 root_objectid
, u64 owner
,
2959 u64 offset
, struct btrfs_key
*ins
);
2960 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2961 struct btrfs_root
*root
,
2962 u64 root_objectid
, u64 owner
, u64 offset
,
2963 struct btrfs_key
*ins
);
2964 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2965 struct btrfs_root
*root
,
2966 u64 num_bytes
, u64 min_alloc_size
,
2967 u64 empty_size
, u64 hint_byte
,
2968 struct btrfs_key
*ins
, u64 data
);
2969 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2970 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2971 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2972 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2973 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2974 struct btrfs_root
*root
,
2975 u64 bytenr
, u64 num_bytes
, u64 flags
,
2977 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2978 struct btrfs_root
*root
,
2979 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2980 u64 owner
, u64 offset
, int for_cow
);
2982 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2983 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2984 u64 start
, u64 len
);
2985 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2986 struct btrfs_root
*root
);
2987 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_root
*root
);
2989 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2990 struct btrfs_root
*root
,
2991 u64 bytenr
, u64 num_bytes
, u64 parent
,
2992 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2994 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2995 struct btrfs_root
*root
);
2996 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2997 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2998 int btrfs_read_block_groups(struct btrfs_root
*root
);
2999 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3000 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3001 struct btrfs_root
*root
, u64 bytes_used
,
3002 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3004 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3005 struct btrfs_root
*root
, u64 group_start
);
3006 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3007 struct btrfs_root
*root
);
3008 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
3009 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3010 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3012 enum btrfs_reserve_flush_enum
{
3013 /* If we are in the transaction, we can't flush anything.*/
3014 BTRFS_RESERVE_NO_FLUSH
,
3016 * Flushing delalloc may cause deadlock somewhere, in this
3017 * case, use FLUSH LIMIT
3019 BTRFS_RESERVE_FLUSH_LIMIT
,
3020 BTRFS_RESERVE_FLUSH_ALL
,
3023 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3024 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3025 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3026 struct btrfs_root
*root
);
3027 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3028 struct inode
*inode
);
3029 void btrfs_orphan_release_metadata(struct inode
*inode
);
3030 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
3031 struct btrfs_pending_snapshot
*pending
);
3032 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3033 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3034 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3035 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3036 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3037 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3038 unsigned short type
);
3039 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3040 struct btrfs_block_rsv
*rsv
);
3041 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3042 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3043 enum btrfs_reserve_flush_enum flush
);
3044 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3045 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3046 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3047 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3048 enum btrfs_reserve_flush_enum flush
);
3049 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3050 struct btrfs_block_rsv
*dst_rsv
,
3052 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3053 struct btrfs_block_rsv
*block_rsv
,
3055 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3056 struct btrfs_block_group_cache
*cache
);
3057 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3058 struct btrfs_block_group_cache
*cache
);
3059 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3060 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3061 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3062 u64 start
, u64 end
);
3063 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3064 u64 num_bytes
, u64
*actual_bytes
);
3065 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_root
*root
, u64 type
);
3067 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3069 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3070 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3071 struct btrfs_fs_info
*fs_info
);
3073 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3074 int level
, int *slot
);
3075 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3076 int btrfs_previous_item(struct btrfs_root
*root
,
3077 struct btrfs_path
*path
, u64 min_objectid
,
3079 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
3080 struct btrfs_root
*root
, struct btrfs_path
*path
,
3081 struct btrfs_key
*new_key
);
3082 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3083 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3084 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3085 struct btrfs_key
*key
, int lowest_level
,
3086 int cache_only
, u64 min_trans
);
3087 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3088 struct btrfs_key
*max_key
,
3089 struct btrfs_path
*path
, int cache_only
,
3091 enum btrfs_compare_tree_result
{
3092 BTRFS_COMPARE_TREE_NEW
,
3093 BTRFS_COMPARE_TREE_DELETED
,
3094 BTRFS_COMPARE_TREE_CHANGED
,
3096 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3097 struct btrfs_root
*right_root
,
3098 struct btrfs_path
*left_path
,
3099 struct btrfs_path
*right_path
,
3100 struct btrfs_key
*key
,
3101 enum btrfs_compare_tree_result result
,
3103 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3104 struct btrfs_root
*right_root
,
3105 btrfs_changed_cb_t cb
, void *ctx
);
3106 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3107 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3108 struct extent_buffer
*parent
, int parent_slot
,
3109 struct extent_buffer
**cow_ret
);
3110 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3111 struct btrfs_root
*root
,
3112 struct extent_buffer
*buf
,
3113 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3114 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3115 struct extent_buffer
*buf
);
3116 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_root
*root
, struct btrfs_path
*path
,
3119 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
3120 struct btrfs_root
*root
,
3121 struct btrfs_path
*path
,
3122 u32 new_size
, int from_end
);
3123 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3124 struct btrfs_root
*root
,
3125 struct btrfs_path
*path
,
3126 struct btrfs_key
*new_key
,
3127 unsigned long split_offset
);
3128 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3129 struct btrfs_root
*root
,
3130 struct btrfs_path
*path
,
3131 struct btrfs_key
*new_key
);
3132 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3133 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3135 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3136 struct btrfs_path
*p
, u64 time_seq
);
3137 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3138 struct btrfs_key
*key
, struct btrfs_path
*p
,
3139 int find_higher
, int return_any
);
3140 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3141 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3142 int start_slot
, int cache_only
, u64
*last_ret
,
3143 struct btrfs_key
*progress
);
3144 void btrfs_release_path(struct btrfs_path
*p
);
3145 struct btrfs_path
*btrfs_alloc_path(void);
3146 void btrfs_free_path(struct btrfs_path
*p
);
3147 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3148 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3149 struct extent_buffer
*held
, int held_rw
);
3150 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3152 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3153 struct btrfs_path
*path
, int slot
, int nr
);
3154 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3155 struct btrfs_root
*root
,
3156 struct btrfs_path
*path
)
3158 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3161 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
, struct btrfs_path
*path
,
3163 struct btrfs_key
*cpu_key
, u32
*data_size
,
3164 u32 total_data
, u32 total_size
, int nr
);
3165 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3166 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3167 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3168 struct btrfs_root
*root
,
3169 struct btrfs_path
*path
,
3170 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3172 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3173 struct btrfs_root
*root
,
3174 struct btrfs_path
*path
,
3175 struct btrfs_key
*key
,
3178 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3181 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3182 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3184 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3185 struct btrfs_path
*p
, u64 time_seq
)
3188 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3189 return btrfs_next_old_leaf(root
, p
, time_seq
);
3192 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3194 return btrfs_next_old_item(root
, p
, 0);
3196 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3197 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3198 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3199 struct btrfs_block_rsv
*block_rsv
,
3200 int update_ref
, int for_reloc
);
3201 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3202 struct btrfs_root
*root
,
3203 struct extent_buffer
*node
,
3204 struct extent_buffer
*parent
);
3205 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3208 * Get synced with close_ctree()
3211 return fs_info
->closing
;
3213 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3215 kfree(fs_info
->balance_ctl
);
3216 kfree(fs_info
->delayed_root
);
3217 kfree(fs_info
->extent_root
);
3218 kfree(fs_info
->tree_root
);
3219 kfree(fs_info
->chunk_root
);
3220 kfree(fs_info
->dev_root
);
3221 kfree(fs_info
->csum_root
);
3222 kfree(fs_info
->quota_root
);
3223 kfree(fs_info
->super_copy
);
3224 kfree(fs_info
->super_for_commit
);
3228 /* tree mod log functions from ctree.c */
3229 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3230 struct seq_list
*elem
);
3231 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3232 struct seq_list
*elem
);
3233 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3235 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3237 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3240 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3241 struct btrfs_path
*path
,
3242 u64 root_id
, u64 ref_id
);
3243 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3244 struct btrfs_root
*tree_root
,
3245 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3246 const char *name
, int name_len
);
3247 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3248 struct btrfs_root
*tree_root
,
3249 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3250 const char *name
, int name_len
);
3251 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3252 struct btrfs_key
*key
);
3253 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3254 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3256 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3257 struct btrfs_root
*root
,
3258 struct btrfs_key
*key
,
3259 struct btrfs_root_item
*item
);
3260 void btrfs_read_root_item(struct btrfs_root
*root
,
3261 struct extent_buffer
*eb
, int slot
,
3262 struct btrfs_root_item
*item
);
3263 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3264 btrfs_root_item
*item
, struct btrfs_key
*key
);
3265 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3266 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3267 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3268 struct extent_buffer
*node
);
3269 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3270 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3271 struct btrfs_root
*root
);
3274 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3275 struct btrfs_root
*root
, const char *name
,
3276 int name_len
, struct inode
*dir
,
3277 struct btrfs_key
*location
, u8 type
, u64 index
);
3278 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3279 struct btrfs_root
*root
,
3280 struct btrfs_path
*path
, u64 dir
,
3281 const char *name
, int name_len
,
3283 struct btrfs_dir_item
*
3284 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3285 struct btrfs_root
*root
,
3286 struct btrfs_path
*path
, u64 dir
,
3287 u64 objectid
, const char *name
, int name_len
,
3289 struct btrfs_dir_item
*
3290 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3291 struct btrfs_path
*path
, u64 dirid
,
3292 const char *name
, int name_len
);
3293 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3294 struct btrfs_path
*path
,
3295 const char *name
, int name_len
);
3296 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3297 struct btrfs_root
*root
,
3298 struct btrfs_path
*path
,
3299 struct btrfs_dir_item
*di
);
3300 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3301 struct btrfs_root
*root
,
3302 struct btrfs_path
*path
, u64 objectid
,
3303 const char *name
, u16 name_len
,
3304 const void *data
, u16 data_len
);
3305 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3306 struct btrfs_root
*root
,
3307 struct btrfs_path
*path
, u64 dir
,
3308 const char *name
, u16 name_len
,
3310 int verify_dir_item(struct btrfs_root
*root
,
3311 struct extent_buffer
*leaf
,
3312 struct btrfs_dir_item
*dir_item
);
3315 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3316 struct btrfs_root
*root
, u64 offset
);
3317 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3318 struct btrfs_root
*root
, u64 offset
);
3319 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3322 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3323 struct btrfs_root
*root
,
3324 const char *name
, int name_len
,
3325 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3326 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3327 struct btrfs_root
*root
,
3328 const char *name
, int name_len
,
3329 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3330 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3331 struct btrfs_root
*root
,
3332 struct btrfs_path
*path
,
3333 const char *name
, int name_len
,
3334 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3336 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3337 struct btrfs_root
*root
,
3338 struct btrfs_path
*path
, u64 objectid
);
3339 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3340 *root
, struct btrfs_path
*path
,
3341 struct btrfs_key
*location
, int mod
);
3343 struct btrfs_inode_extref
*
3344 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3345 struct btrfs_root
*root
,
3346 struct btrfs_path
*path
,
3347 const char *name
, int name_len
,
3348 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3351 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3352 u64 ref_objectid
, const char *name
,
3354 struct btrfs_inode_extref
**extref_ret
);
3357 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3358 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3359 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3360 struct bio
*bio
, u32
*dst
);
3361 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3362 struct bio
*bio
, u64 logical_offset
);
3363 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3364 struct btrfs_root
*root
,
3365 u64 objectid
, u64 pos
,
3366 u64 disk_offset
, u64 disk_num_bytes
,
3367 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3368 u8 compression
, u8 encryption
, u16 other_encoding
);
3369 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3370 struct btrfs_root
*root
,
3371 struct btrfs_path
*path
, u64 objectid
,
3372 u64 bytenr
, int mod
);
3373 u64
btrfs_file_extent_length(struct btrfs_path
*path
);
3374 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3375 struct btrfs_root
*root
,
3376 struct btrfs_ordered_sum
*sums
);
3377 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3378 struct bio
*bio
, u64 file_start
, int contig
);
3379 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3380 struct btrfs_root
*root
,
3381 struct btrfs_path
*path
,
3382 u64 bytenr
, int cow
);
3383 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3384 struct btrfs_root
*root
, struct btrfs_path
*path
,
3386 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3387 struct list_head
*list
, int search_commit
);
3389 struct btrfs_delalloc_work
{
3390 struct inode
*inode
;
3393 struct completion completion
;
3394 struct list_head list
;
3395 struct btrfs_work work
;
3398 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3399 int wait
, int delay_iput
);
3400 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3402 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3403 size_t pg_offset
, u64 start
, u64 len
,
3406 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3407 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3408 #define ClearPageChecked ClearPageFsMisc
3409 #define SetPageChecked SetPageFsMisc
3410 #define PageChecked PageFsMisc
3413 /* This forces readahead on a given range of bytes in an inode */
3414 static inline void btrfs_force_ra(struct address_space
*mapping
,
3415 struct file_ra_state
*ra
, struct file
*file
,
3416 pgoff_t offset
, unsigned long req_size
)
3418 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3421 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3422 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3423 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3424 struct btrfs_root
*root
,
3425 struct inode
*dir
, struct inode
*inode
,
3426 const char *name
, int name_len
);
3427 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3428 struct inode
*parent_inode
, struct inode
*inode
,
3429 const char *name
, int name_len
, int add_backref
, u64 index
);
3430 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3431 struct btrfs_root
*root
,
3432 struct inode
*dir
, u64 objectid
,
3433 const char *name
, int name_len
);
3434 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3436 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3437 struct btrfs_root
*root
,
3438 struct inode
*inode
, u64 new_size
,
3441 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3442 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3443 struct extent_state
**cached_state
);
3444 int btrfs_writepages(struct address_space
*mapping
,
3445 struct writeback_control
*wbc
);
3446 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3447 struct btrfs_root
*new_root
, u64 new_dirid
);
3448 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3449 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
3451 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3452 int btrfs_readpage(struct file
*file
, struct page
*page
);
3453 void btrfs_evict_inode(struct inode
*inode
);
3454 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3455 int btrfs_dirty_inode(struct inode
*inode
);
3456 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3457 void btrfs_destroy_inode(struct inode
*inode
);
3458 int btrfs_drop_inode(struct inode
*inode
);
3459 int btrfs_init_cachep(void);
3460 void btrfs_destroy_cachep(void);
3461 long btrfs_ioctl_trans_end(struct file
*file
);
3462 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3463 struct btrfs_root
*root
, int *was_new
);
3464 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3465 size_t pg_offset
, u64 start
, u64 end
,
3467 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3468 struct btrfs_root
*root
,
3469 struct inode
*inode
);
3470 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3471 struct btrfs_root
*root
, struct inode
*inode
);
3472 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3473 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3474 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3475 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3476 struct btrfs_root
*root
);
3477 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3478 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3479 void btrfs_add_delayed_iput(struct inode
*inode
);
3480 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3481 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3482 u64 start
, u64 num_bytes
, u64 min_size
,
3483 loff_t actual_len
, u64
*alloc_hint
);
3484 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3485 struct btrfs_trans_handle
*trans
, int mode
,
3486 u64 start
, u64 num_bytes
, u64 min_size
,
3487 loff_t actual_len
, u64
*alloc_hint
);
3488 extern const struct dentry_operations btrfs_dentry_operations
;
3491 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3492 void btrfs_update_iflags(struct inode
*inode
);
3493 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3494 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3495 struct btrfs_ioctl_defrag_range_args
*range
,
3496 u64 newer_than
, unsigned long max_pages
);
3497 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3498 struct btrfs_ioctl_space_info
*space
);
3501 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3502 struct inode
*inode
);
3503 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3504 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3505 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3507 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3508 u64 start
, u64 end
, int skip_pinned
,
3510 extern const struct file_operations btrfs_file_operations
;
3511 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3512 struct btrfs_root
*root
, struct inode
*inode
,
3513 struct btrfs_path
*path
, u64 start
, u64 end
,
3514 u64
*drop_end
, int drop_cache
);
3515 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3516 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3517 u64 end
, int drop_cache
);
3518 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3519 struct inode
*inode
, u64 start
, u64 end
);
3520 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3521 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3522 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3523 struct page
**pages
, size_t num_pages
,
3524 loff_t pos
, size_t write_bytes
,
3525 struct extent_state
**cached
);
3528 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3529 struct btrfs_root
*root
, int cache_only
);
3532 int btrfs_init_sysfs(void);
3533 void btrfs_exit_sysfs(void);
3536 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3539 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3540 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3542 #ifdef CONFIG_PRINTK
3544 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3546 static inline __printf(2, 3)
3547 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3553 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3554 unsigned int line
, int errno
, const char *fmt
, ...);
3557 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3558 struct btrfs_root
*root
, const char *function
,
3559 unsigned int line
, int errno
);
3561 #define btrfs_set_fs_incompat(__fs_info, opt) \
3562 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3564 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3567 struct btrfs_super_block
*disk_super
;
3570 disk_super
= fs_info
->super_copy
;
3571 features
= btrfs_super_incompat_flags(disk_super
);
3572 if (!(features
& flag
)) {
3574 btrfs_set_super_incompat_flags(disk_super
, features
);
3579 * Call btrfs_abort_transaction as early as possible when an error condition is
3580 * detected, that way the exact line number is reported.
3583 #define btrfs_abort_transaction(trans, root, errno) \
3585 __btrfs_abort_transaction(trans, root, __func__, \
3589 #define btrfs_std_error(fs_info, errno) \
3592 __btrfs_std_error((fs_info), __func__, \
3593 __LINE__, (errno), NULL); \
3596 #define btrfs_error(fs_info, errno, fmt, args...) \
3598 __btrfs_std_error((fs_info), __func__, __LINE__, \
3599 (errno), fmt, ##args); \
3603 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3604 unsigned int line
, int errno
, const char *fmt
, ...);
3606 #define btrfs_panic(fs_info, errno, fmt, args...) \
3608 struct btrfs_fs_info *_i = (fs_info); \
3609 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3610 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3614 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3615 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3616 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3617 struct inode
*inode
, struct inode
*dir
);
3618 int btrfs_acl_chmod(struct inode
*inode
);
3620 #define btrfs_get_acl NULL
3621 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3622 struct inode
*inode
, struct inode
*dir
)
3626 static inline int btrfs_acl_chmod(struct inode
*inode
)
3633 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3634 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3635 struct btrfs_root
*root
);
3636 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3637 struct btrfs_root
*root
);
3638 int btrfs_recover_relocation(struct btrfs_root
*root
);
3639 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3640 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3641 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3642 struct extent_buffer
*cow
);
3643 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3644 struct btrfs_pending_snapshot
*pending
,
3645 u64
*bytes_to_reserve
);
3646 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3647 struct btrfs_pending_snapshot
*pending
);
3650 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3651 u64 end
, struct btrfs_scrub_progress
*progress
,
3652 int readonly
, int is_dev_replace
);
3653 void btrfs_scrub_pause(struct btrfs_root
*root
);
3654 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3655 void btrfs_scrub_continue(struct btrfs_root
*root
);
3656 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3657 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3658 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3659 struct btrfs_device
*dev
);
3660 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3661 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3662 struct btrfs_scrub_progress
*progress
);
3665 struct reada_control
{
3666 struct btrfs_root
*root
; /* tree to prefetch */
3667 struct btrfs_key key_start
;
3668 struct btrfs_key key_end
; /* exclusive */
3671 wait_queue_head_t wait
;
3673 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3674 struct btrfs_key
*start
, struct btrfs_key
*end
);
3675 int btrfs_reada_wait(void *handle
);
3676 void btrfs_reada_detach(void *handle
);
3677 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3678 u64 start
, int err
);
3681 struct qgroup_update
{
3682 struct list_head list
;
3683 struct btrfs_delayed_ref_node
*node
;
3684 struct btrfs_delayed_extent_op
*extent_op
;
3687 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3688 struct btrfs_fs_info
*fs_info
);
3689 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3690 struct btrfs_fs_info
*fs_info
);
3691 int btrfs_quota_rescan(struct btrfs_fs_info
*fs_info
);
3692 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3693 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3694 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3695 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3696 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3697 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3699 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3700 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3701 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3702 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3703 struct btrfs_qgroup_limit
*limit
);
3704 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3705 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3706 struct btrfs_delayed_extent_op
;
3707 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3708 struct btrfs_delayed_ref_node
*node
,
3709 struct btrfs_delayed_extent_op
*extent_op
);
3710 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3711 struct btrfs_fs_info
*fs_info
,
3712 struct btrfs_delayed_ref_node
*node
,
3713 struct btrfs_delayed_extent_op
*extent_op
);
3714 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3715 struct btrfs_fs_info
*fs_info
);
3716 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3717 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3718 struct btrfs_qgroup_inherit
*inherit
);
3719 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
3720 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
3722 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
3724 static inline int is_fstree(u64 rootid
)
3726 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3727 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)