blob: 399521ab61da0180d869333038de0af3ecd9285b [file] [log] [blame]
Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
Chris Masoneb60cea2007-02-02 09:18:22 -050021
Chris Mason810191f2007-10-15 16:18:55 -040022#include <linux/mm.h>
23#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040024#include <linux/fs.h>
Arne Jansena2de7332011-03-08 14:14:00 +010025#include <linux/rwsem.h>
Josef Bacik58176a92007-08-29 15:47:34 -040026#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040027#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040028#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Stefan Schmidtf8b18082011-01-12 10:30:42 +010030#include <linux/kobject.h>
liubo1abe9b82011-03-24 11:18:59 +000031#include <trace/events/btrfs.h>
Chris Mason479965d2007-10-15 16:14:27 -040032#include <asm/kmap_types.h>
Josef Bacik3b16a4e2011-09-21 15:05:58 -040033#include <linux/pagemap.h>
Chris Masond1310b22008-01-24 16:13:08 -050034#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040035#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040036#include "async-thread.h"
Arne Jansena2de7332011-03-08 14:14:00 +010037#include "ioctl.h"
Chris Masone20d96d2007-03-22 12:13:20 -040038
Chris Masone089f052007-03-16 16:20:31 -040039struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040040struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040041struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040042extern struct kmem_cache *btrfs_trans_handle_cachep;
43extern struct kmem_cache *btrfs_transaction_cachep;
44extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040045extern struct kmem_cache *btrfs_path_cachep;
Josef Bacikdc89e982011-01-28 17:05:48 -050046extern struct kmem_cache *btrfs_free_space_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040047struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040048
Chris Mason2a7108a2008-12-02 09:58:02 -050049#define BTRFS_MAGIC "_BHRfS_M"
Chris Masoneb60cea2007-02-02 09:18:22 -050050
Stefan Behrens94598ba2012-03-27 14:21:26 -040051#define BTRFS_MAX_MIRRORS 2
52
Chris Mason4008c042009-02-12 14:09:45 -050053#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040054
Yan Zheng5d4f98a2009-06-10 10:45:14 -040055#define BTRFS_COMPAT_EXTENT_TREE_V0
56
Chris Mason5a3f23d2009-03-31 13:27:11 -040057/*
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
61 */
62#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
63
Chris Mason0b86a832008-03-24 15:01:56 -040064/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040065#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040066
67/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040068#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040069
Chris Mason0b86a832008-03-24 15:01:56 -040070/*
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
73 */
Chris Masone085def2008-03-24 15:02:07 -040074#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040075
76/*
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
79 */
Chris Masone085def2008-03-24 15:02:07 -040080#define BTRFS_DEV_TREE_OBJECTID 4ULL
81
82/* one per subvolume, storing files and directories */
83#define BTRFS_FS_TREE_OBJECTID 5ULL
84
85/* directory objectid inside the root tree */
86#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040087
Chris Masond20f7042008-12-08 16:58:54 -050088/* holds checksums of all the data extents */
89#define BTRFS_CSUM_TREE_OBJECTID 7ULL
90
Ilya Dryomov0940ebf2012-01-16 22:04:48 +020091/* for storing balance parameters in the root tree */
92#define BTRFS_BALANCE_OBJECTID -4ULL
93
Arne Jansen630dc772011-09-13 11:06:07 +020094/* holds quota configuration and tracking */
95#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
96
Josef Bacik7b128762008-07-24 12:17:14 -040097/* orhpan objectid for tracking unlinked/truncated files */
98#define BTRFS_ORPHAN_OBJECTID -5ULL
99
Chris Masone02119d2008-09-05 16:13:11 -0400100/* does write ahead logging to speed up fsyncs */
101#define BTRFS_TREE_LOG_OBJECTID -6ULL
102#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
103
Zheng Yane4657682008-09-26 10:04:53 -0400104/* for space balancing */
105#define BTRFS_TREE_RELOC_OBJECTID -8ULL
106#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
107
Chris Masond20f7042008-12-08 16:58:54 -0500108/*
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
111 * for fsyncs
112 */
113#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
114
Josef Bacik0af3d002010-06-21 14:48:16 -0400115/* For storing free space cache */
116#define BTRFS_FREE_SPACE_OBJECTID -11ULL
117
Li Zefan82d59022011-04-20 10:33:24 +0800118/*
119 * The inode number assigned to the special inode for sotring
120 * free ino cache
121 */
122#define BTRFS_FREE_INO_OBJECTID -12ULL
123
Zheng Yan31840ae2008-09-23 13:14:14 -0400124/* dummy objectid represents multiple objectids */
125#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
126
Chris Mason0b86a832008-03-24 15:01:56 -0400127/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400128 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400129 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500130#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400131#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400132#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400133
Chris Mason0b86a832008-03-24 15:01:56 -0400134
135/*
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
138 */
139#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
140
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400141#define BTRFS_BTREE_INODE_OBJECTID 1
142
143#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
144
Chris Masonfec577f2007-02-26 10:40:21 -0500145/*
Chris Mason727011e2010-08-06 13:21:20 -0400146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
148 */
149#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
150
151/*
Chris Masone20d96d2007-03-22 12:13:20 -0400152 * we can actually store much bigger names, but lets not confuse the rest
153 * of linux
154 */
155#define BTRFS_NAME_LEN 255
156
Chris Masonf254e522007-03-29 15:15:27 -0400157/* 32 bytes in various csum fields */
158#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500159
160/* csum types */
161#define BTRFS_CSUM_TYPE_CRC32 0
162
163static int btrfs_csum_sizes[] = { 4, 0 };
164
Chris Mason509659c2007-05-10 12:36:17 -0400165/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500166#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400167
Chris Masonfabb5682007-06-07 22:13:21 -0400168#define BTRFS_FT_UNKNOWN 0
169#define BTRFS_FT_REG_FILE 1
170#define BTRFS_FT_DIR 2
171#define BTRFS_FT_CHRDEV 3
172#define BTRFS_FT_BLKDEV 4
173#define BTRFS_FT_FIFO 5
174#define BTRFS_FT_SOCK 6
175#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500176#define BTRFS_FT_XATTR 8
177#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400178
Stefan Behrens3d136a12012-02-03 11:20:04 +0100179/* ioprio of readahead is set to idle */
180#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
181
Chris Masone20d96d2007-03-22 12:13:20 -0400182/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400183 * The key defines the order in the tree, and so it also defines (optimal)
184 * block layout.
185 *
186 * objectid corresponds to the inode number.
187 *
188 * type tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with type of 1 might refer to the inode data,
190 * type of 2 may point to file data in the btree and type == 3 may point to
191 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500192 *
193 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400194 *
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500198 */
Chris Masone2fa7222007-03-12 16:22:34 -0400199struct btrfs_disk_key {
200 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400201 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400202 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400203} __attribute__ ((__packed__));
204
205struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500206 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400207 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400208 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500209} __attribute__ ((__packed__));
210
Chris Mason0b86a832008-03-24 15:01:56 -0400211struct btrfs_mapping_tree {
212 struct extent_map_tree map_tree;
213};
214
Chris Mason0b86a832008-03-24 15:01:56 -0400215struct btrfs_dev_item {
216 /* the internal btrfs device id */
217 __le64 devid;
218
219 /* size of the device */
220 __le64 total_bytes;
221
222 /* bytes used */
223 __le64 bytes_used;
224
225 /* optimal io alignment for this device */
226 __le32 io_align;
227
228 /* optimal io width for this device */
229 __le32 io_width;
230
231 /* minimal io size for this device */
232 __le32 sector_size;
233
Chris Mason0b86a832008-03-24 15:01:56 -0400234 /* type and info about this device */
235 __le64 type;
236
Yan Zheng2b820322008-11-17 21:11:30 -0500237 /* expected generation for this device */
238 __le64 generation;
239
Chris Masonc3027eb2008-12-08 16:40:21 -0500240 /*
241 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400242 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500243 */
244 __le64 start_offset;
245
Chris Masone17cade2008-04-15 15:41:47 -0400246 /* grouping information for allocation decisions */
247 __le32 dev_group;
248
249 /* seek speed 0-100 where 100 is fastest */
250 u8 seek_speed;
251
252 /* bandwidth 0-100 where 100 is fastest */
253 u8 bandwidth;
254
Chris Mason0d81ba52008-03-24 15:02:07 -0400255 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400256 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500257
258 /* uuid of FS who owns this device */
259 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400260} __attribute__ ((__packed__));
261
262struct btrfs_stripe {
263 __le64 devid;
264 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400265 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400266} __attribute__ ((__packed__));
267
268struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400269 /* size of this chunk in bytes */
270 __le64 length;
271
272 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400273 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400274
Chris Mason0b86a832008-03-24 15:01:56 -0400275 __le64 stripe_len;
276 __le64 type;
277
278 /* optimal io alignment for this chunk */
279 __le32 io_align;
280
281 /* optimal io width for this chunk */
282 __le32 io_width;
283
284 /* minimal io size for this chunk */
285 __le32 sector_size;
286
287 /* 2^16 stripes is quite a lot, a second limit is the size of a single
288 * item in the btree
289 */
290 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400291
292 /* sub stripes only matter for raid10 */
293 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400294 struct btrfs_stripe stripe;
295 /* additional stripes go here */
296} __attribute__ ((__packed__));
297
Josef Bacik0af3d002010-06-21 14:48:16 -0400298#define BTRFS_FREE_SPACE_EXTENT 1
299#define BTRFS_FREE_SPACE_BITMAP 2
300
301struct btrfs_free_space_entry {
302 __le64 offset;
303 __le64 bytes;
304 u8 type;
305} __attribute__ ((__packed__));
306
307struct btrfs_free_space_header {
308 struct btrfs_disk_key location;
309 __le64 generation;
310 __le64 num_entries;
311 __le64 num_bitmaps;
312} __attribute__ ((__packed__));
313
Chris Mason0b86a832008-03-24 15:01:56 -0400314static inline unsigned long btrfs_chunk_item_size(int num_stripes)
315{
316 BUG_ON(num_stripes == 0);
317 return sizeof(struct btrfs_chunk) +
318 sizeof(struct btrfs_stripe) * (num_stripes - 1);
319}
320
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400321#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
322#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
liuboacce9522011-01-06 19:30:25 +0800323
324/*
325 * File system states
326 */
327
328/* Errors detected */
329#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
330
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400331#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
332#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
333
334#define BTRFS_BACKREF_REV_MAX 256
335#define BTRFS_BACKREF_REV_SHIFT 56
336#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
337 BTRFS_BACKREF_REV_SHIFT)
338
339#define BTRFS_OLD_BACKREF_REV 0
340#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400341
Chris Masonfec577f2007-02-26 10:40:21 -0500342/*
343 * every tree block (leaf or node) starts with this header.
344 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400345struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400346 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400347 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400348 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400349 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400350 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400351
352 /* allowed to be different from the super from here on down */
353 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400354 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400355 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400356 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400357 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500358} __attribute__ ((__packed__));
359
Chris Mason5f39d392007-10-15 16:14:19 -0400360#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500361 sizeof(struct btrfs_header)) / \
362 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400363#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400364#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454df2007-04-19 13:37:44 -0400365#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) - \
367 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000368#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
369 sizeof(struct btrfs_item) -\
370 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500371
Chris Mason0b86a832008-03-24 15:01:56 -0400372
373/*
374 * this is a very generous portion of the super block, giving us
375 * room to translate 14 chunks with 3 stripes each.
376 */
377#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400378#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400379
Chris Masonfec577f2007-02-26 10:40:21 -0500380/*
Chris Masonaf31f5e2011-11-03 15:17:42 -0400381 * just in case we somehow lose the roots and are not able to mount,
382 * we store an array of the roots from previous transactions
383 * in the super.
384 */
385#define BTRFS_NUM_BACKUP_ROOTS 4
386struct btrfs_root_backup {
387 __le64 tree_root;
388 __le64 tree_root_gen;
389
390 __le64 chunk_root;
391 __le64 chunk_root_gen;
392
393 __le64 extent_root;
394 __le64 extent_root_gen;
395
396 __le64 fs_root;
397 __le64 fs_root_gen;
398
399 __le64 dev_root;
400 __le64 dev_root_gen;
401
402 __le64 csum_root;
403 __le64 csum_root_gen;
404
405 __le64 total_bytes;
406 __le64 bytes_used;
407 __le64 num_devices;
408 /* future */
409 __le64 unsed_64[4];
410
411 u8 tree_root_level;
412 u8 chunk_root_level;
413 u8 extent_root_level;
414 u8 fs_root_level;
415 u8 dev_root_level;
416 u8 csum_root_level;
417 /* future and to align */
418 u8 unused_8[10];
419} __attribute__ ((__packed__));
420
421/*
Chris Masonfec577f2007-02-26 10:40:21 -0500422 * the super block basically lists the main trees of the FS
423 * it currently lacks any block count etc etc
424 */
Chris Mason234b63a2007-03-13 10:46:10 -0400425struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400426 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400427 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500428 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400429 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400430 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400431
432 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400433 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400434 __le64 generation;
435 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400436 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400437 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500438
439 /* this will help find the new super based on the log root */
440 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400441 __le64 total_bytes;
442 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400443 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400444 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400445 __le32 sectorsize;
446 __le32 nodesize;
447 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500448 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400449 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400450 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500451 __le64 compat_flags;
452 __le64 compat_ro_flags;
453 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500454 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400455 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400456 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400457 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400458 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500459
Chris Mason7ae9c092008-04-18 10:29:49 -0400460 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500461
Josef Bacik0af3d002010-06-21 14:48:16 -0400462 __le64 cache_generation;
463
Chris Masonc3027eb2008-12-08 16:40:21 -0500464 /* future expansion */
Josef Bacik0af3d002010-06-21 14:48:16 -0400465 __le64 reserved[31];
Chris Mason0b86a832008-03-24 15:01:56 -0400466 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400467 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
Chris Masoncfaa7292007-02-21 17:04:57 -0500468} __attribute__ ((__packed__));
469
Chris Masonfec577f2007-02-26 10:40:21 -0500470/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500471 * Compat flags that we support. If any incompat flags are set other than the
472 * ones specified below then we will fail to mount
473 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400474#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
Josef Bacik0af3d002010-06-21 14:48:16 -0400475#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
Josef Bacik67377732010-09-16 16:19:09 -0400476#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
Li Zefana6fa6fa2010-10-25 15:12:26 +0800477#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
Chris Mason727011e2010-08-06 13:21:20 -0400478/*
479 * some patches floated around with a second compression method
480 * lets save that incompat here for when they do get in
481 * Note we don't actually support it, we're just reserving the
482 * number
483 */
484#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
485
486/*
487 * older kernels tried to do bigger metadata blocks, but the
488 * code was pretty buggy. Lets not let them try anymore.
489 */
490#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400491
492#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
Josef Bacik0af3d002010-06-21 14:48:16 -0400494#define BTRFS_FEATURE_INCOMPAT_SUPP \
495 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
Josef Bacik67377732010-09-16 16:19:09 -0400496 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
Chris Mason727011e2010-08-06 13:21:20 -0400498 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500500
501/*
Chris Mason62e27492007-03-15 12:56:47 -0400502 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500503 * the item in the leaf (relative to the start of the data area)
504 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400505struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400506 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400507 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400508 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500509} __attribute__ ((__packed__));
510
Chris Masonfec577f2007-02-26 10:40:21 -0500511/*
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
514 *
515 * The data is separate from the items to get the keys closer together
516 * during searches.
517 */
Chris Mason234b63a2007-03-13 10:46:10 -0400518struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400519 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400520 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500521} __attribute__ ((__packed__));
522
Chris Masonfec577f2007-02-26 10:40:21 -0500523/*
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
525 * other blocks
526 */
Chris Mason123abc82007-03-14 14:14:43 -0400527struct btrfs_key_ptr {
528 struct btrfs_disk_key key;
529 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500530 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400531} __attribute__ ((__packed__));
532
Chris Mason234b63a2007-03-13 10:46:10 -0400533struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400534 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400535 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500536} __attribute__ ((__packed__));
537
Chris Masonfec577f2007-02-26 10:40:21 -0500538/*
Chris Mason234b63a2007-03-13 10:46:10 -0400539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500541 * to any other levels that are present.
542 *
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
545 */
Chris Mason234b63a2007-03-13 10:46:10 -0400546struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400547 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400548 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400549 /* if there is real range locking, this locks field will change */
550 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400551 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400552 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400553 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500554
555 /*
556 * set by btrfs_split_item, tells search_slot to keep all locks
557 * and to force calls to keep space in the nodes
558 */
Chris Masonb9473432009-03-13 11:00:37 -0400559 unsigned int search_for_split:1;
560 unsigned int keep_locks:1;
561 unsigned int skip_locking:1;
562 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400563 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500564};
Chris Mason5de08d72007-02-24 06:24:44 -0500565
Chris Mason62e27492007-03-15 12:56:47 -0400566/*
567 * items in the extent btree are used to record the objectid of the
568 * owner of the block and the number of references
569 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400570
Chris Mason62e27492007-03-15 12:56:47 -0400571struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400572 __le64 refs;
573 __le64 generation;
574 __le64 flags;
575} __attribute__ ((__packed__));
576
577struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400578 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500579} __attribute__ ((__packed__));
580
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400581#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
582 sizeof(struct btrfs_item))
583
584#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
585#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
586
587/* following flags only apply to tree blocks */
588
589/* use full backrefs for extent pointers in the block */
590#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
591
Arne Jansena2de7332011-03-08 14:14:00 +0100592/*
593 * this flag is only used internally by scrub and may be changed at any time
594 * it is only declared here to avoid collisions
595 */
596#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
597
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400598struct btrfs_tree_block_info {
599 struct btrfs_disk_key key;
600 u8 level;
601} __attribute__ ((__packed__));
602
603struct btrfs_extent_data_ref {
604 __le64 root;
605 __le64 objectid;
606 __le64 offset;
607 __le32 count;
608} __attribute__ ((__packed__));
609
610struct btrfs_shared_data_ref {
611 __le32 count;
612} __attribute__ ((__packed__));
613
614struct btrfs_extent_inline_ref {
615 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400616 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400617} __attribute__ ((__packed__));
618
619/* old style backrefs item */
620struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500621 __le64 root;
622 __le64 generation;
623 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400624 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400625} __attribute__ ((__packed__));
626
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400627
Chris Mason0b86a832008-03-24 15:01:56 -0400628/* dev extents record free space on individual devices. The owner
629 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400630 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400631 */
632struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400633 __le64 chunk_tree;
634 __le64 chunk_objectid;
635 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400636 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400637 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400638} __attribute__ ((__packed__));
639
Chris Mason39544012007-12-12 14:38:19 -0500640struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400641 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500642 __le16 name_len;
643 /* name goes here */
644} __attribute__ ((__packed__));
645
Chris Mason0b86a832008-03-24 15:01:56 -0400646struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400647 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400648 __le32 nsec;
649} __attribute__ ((__packed__));
650
Jan Engelhardt95029d72009-01-21 10:49:16 -0500651enum btrfs_compression_type {
Li Zefan261507a02010-12-17 14:21:50 +0800652 BTRFS_COMPRESS_NONE = 0,
653 BTRFS_COMPRESS_ZLIB = 1,
Li Zefana6fa6fa2010-10-25 15:12:26 +0800654 BTRFS_COMPRESS_LZO = 2,
655 BTRFS_COMPRESS_TYPES = 2,
656 BTRFS_COMPRESS_LAST = 3,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500657};
Chris Masonc8b97812008-10-29 14:49:59 -0400658
Chris Mason1e1d2702007-03-15 19:03:33 -0400659struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400660 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400661 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400662 /* transid that last touched this inode */
663 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400664 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400665 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400666 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400667 __le32 nlink;
668 __le32 uid;
669 __le32 gid;
670 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400671 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500672 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400673
Chris Masonc3027eb2008-12-08 16:40:21 -0500674 /* modification sequence number for NFS */
675 __le64 sequence;
676
677 /*
678 * a little future expansion, for more than this we can
679 * just grow the inode item and version it
680 */
681 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400682 struct btrfs_timespec atime;
683 struct btrfs_timespec ctime;
684 struct btrfs_timespec mtime;
685 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400686} __attribute__ ((__packed__));
687
Chris Masone02119d2008-09-05 16:13:11 -0400688struct btrfs_dir_log_item {
689 __le64 end;
690} __attribute__ ((__packed__));
691
Chris Mason62e27492007-03-15 12:56:47 -0400692struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400693 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400694 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500695 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400696 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400697 u8 type;
698} __attribute__ ((__packed__));
699
Li Zefanb83cc962010-12-20 16:04:08 +0800700#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
701
Chris Mason62e27492007-03-15 12:56:47 -0400702struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400703 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400704 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400705 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400706 __le64 bytenr;
707 __le64 byte_limit;
708 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400709 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500710 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400711 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400712 struct btrfs_disk_key drop_progress;
713 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400714 u8 level;
Alexander Block8ea05e32012-07-25 17:35:53 +0200715
716 /*
717 * The following fields appear after subvol_uuids+subvol_times
718 * were introduced.
719 */
720
721 /*
722 * This generation number is used to test if the new fields are valid
723 * and up to date while reading the root item. Everytime the root item
724 * is written out, the "generation" field is copied into this field. If
725 * anyone ever mounted the fs with an older kernel, we will have
726 * mismatching generation values here and thus must invalidate the
727 * new fields. See btrfs_update_root and btrfs_find_last_root for
728 * details.
729 * the offset of generation_v2 is also used as the start for the memset
730 * when invalidating the fields.
731 */
732 __le64 generation_v2;
733 u8 uuid[BTRFS_UUID_SIZE];
734 u8 parent_uuid[BTRFS_UUID_SIZE];
735 u8 received_uuid[BTRFS_UUID_SIZE];
736 __le64 ctransid; /* updated when an inode changes */
737 __le64 otransid; /* trans when created */
738 __le64 stransid; /* trans when sent. non-zero for received subvol */
739 __le64 rtransid; /* trans when received. non-zero for received subvol */
740 struct btrfs_timespec ctime;
741 struct btrfs_timespec otime;
742 struct btrfs_timespec stime;
743 struct btrfs_timespec rtime;
744 __le64 reserved[8]; /* for future */
Chris Mason9f5fae22007-03-20 14:38:32 -0400745} __attribute__ ((__packed__));
746
Chris Mason0660b5a2008-11-17 20:37:39 -0500747/*
748 * this is used for both forward and backward root refs
749 */
750struct btrfs_root_ref {
751 __le64 dirid;
752 __le64 sequence;
753 __le16 name_len;
754} __attribute__ ((__packed__));
755
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200756struct btrfs_disk_balance_args {
757 /*
758 * profiles to operate on, single is denoted by
759 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
760 */
761 __le64 profiles;
762
763 /* usage filter */
764 __le64 usage;
765
766 /* devid filter */
767 __le64 devid;
768
769 /* devid subset filter [pstart..pend) */
770 __le64 pstart;
771 __le64 pend;
772
773 /* btrfs virtual address space subset filter [vstart..vend) */
774 __le64 vstart;
775 __le64 vend;
776
777 /*
778 * profile to convert to, single is denoted by
779 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
780 */
781 __le64 target;
782
783 /* BTRFS_BALANCE_ARGS_* */
784 __le64 flags;
785
786 __le64 unused[8];
787} __attribute__ ((__packed__));
788
789/*
790 * store balance parameters to disk so that balance can be properly
791 * resumed after crash or unmount
792 */
793struct btrfs_balance_item {
794 /* BTRFS_BALANCE_* */
795 __le64 flags;
796
797 struct btrfs_disk_balance_args data;
798 struct btrfs_disk_balance_args meta;
799 struct btrfs_disk_balance_args sys;
800
801 __le64 unused[4];
802} __attribute__ ((__packed__));
803
Yan Zhengd899e052008-10-30 14:25:28 -0400804#define BTRFS_FILE_EXTENT_INLINE 0
805#define BTRFS_FILE_EXTENT_REG 1
806#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454df2007-04-19 13:37:44 -0400807
Chris Mason9f5fae22007-03-20 14:38:32 -0400808struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400809 /*
810 * transaction id that created this extent
811 */
Chris Mason71951f32007-03-27 09:16:29 -0400812 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400813 /*
814 * max number of bytes to hold this extent in ram
815 * when we split a compressed extent we can't know how big
816 * each of the resulting pieces will be. So, this is
817 * an upper limit on the size of the extent in ram instead of
818 * an exact limit.
819 */
820 __le64 ram_bytes;
821
822 /*
823 * 32 bits for the various ways we might encode the data,
824 * including compression and encryption. If any of these
825 * are set to something a given disk format doesn't understand
826 * it is treated like an incompat flag for reading and writing,
827 * but not for stat.
828 */
829 u8 compression;
830 u8 encryption;
831 __le16 other_encoding; /* spare for later use */
832
833 /* are we inline data or a real extent? */
Chris Mason236454df2007-04-19 13:37:44 -0400834 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400835
Chris Mason9f5fae22007-03-20 14:38:32 -0400836 /*
837 * disk space consumed by the extent, checksum blocks are included
838 * in these numbers
839 */
Chris Masondb945352007-10-15 16:15:53 -0400840 __le64 disk_bytenr;
841 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400842 /*
Chris Masondee26a92007-03-26 16:00:06 -0400843 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400844 * this extent record is for. This allows a file extent to point
845 * into the middle of an existing extent on disk, sharing it
846 * between two snapshots (useful if some bytes in the middle of the
847 * extent have changed
848 */
849 __le64 offset;
850 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400851 * the logical number of file blocks (no csums included). This
852 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400853 */
Chris Masondb945352007-10-15 16:15:53 -0400854 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400855
Chris Mason9f5fae22007-03-20 14:38:32 -0400856} __attribute__ ((__packed__));
857
Chris Masonf254e522007-03-29 15:15:27 -0400858struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400859 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400860} __attribute__ ((__packed__));
861
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200862struct btrfs_dev_stats_item {
863 /*
864 * grow this item struct at the end for future enhancements and keep
865 * the existing values unchanged
866 */
867 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
868} __attribute__ ((__packed__));
869
Chris Mason0b86a832008-03-24 15:01:56 -0400870/* different types of block groups (and chunks) */
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200871#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
872#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
873#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
874#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
875#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
876#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
877#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200878#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200879#define BTRFS_NR_RAID_TYPES 5
Chris Mason1e2677e2007-05-29 16:52:18 -0400880
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200881#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
882 BTRFS_BLOCK_GROUP_SYSTEM | \
883 BTRFS_BLOCK_GROUP_METADATA)
884
885#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
886 BTRFS_BLOCK_GROUP_RAID1 | \
887 BTRFS_BLOCK_GROUP_DUP | \
888 BTRFS_BLOCK_GROUP_RAID10)
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200889/*
890 * We need a bit for restriper to be able to tell when chunks of type
891 * SINGLE are available. This "extended" profile format is used in
892 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
893 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
894 * to avoid remappings between two formats in future.
895 */
896#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
897
Ilya Dryomov899c81e2012-03-27 17:09:16 +0300898#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
899 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
900
901static inline u64 chunk_to_extended(u64 flags)
902{
903 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
904 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
905
906 return flags;
907}
908static inline u64 extended_to_chunk(u64 flags)
909{
910 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
911}
912
Chris Mason9078a3e2007-04-26 16:46:15 -0400913struct btrfs_block_group_item {
914 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -0400915 __le64 chunk_objectid;
916 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -0400917} __attribute__ ((__packed__));
918
Arne Jansen630dc772011-09-13 11:06:07 +0200919/*
920 * is subvolume quota turned on?
921 */
922#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
923/*
924 * SCANNING is set during the initialization phase
925 */
926#define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
927/*
928 * Some qgroup entries are known to be out of date,
929 * either because the configuration has changed in a way that
930 * makes a rescan necessary, or because the fs has been mounted
931 * with a non-qgroup-aware version.
932 * Turning qouta off and on again makes it inconsistent, too.
933 */
934#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
935
936#define BTRFS_QGROUP_STATUS_VERSION 1
937
938struct btrfs_qgroup_status_item {
939 __le64 version;
940 /*
941 * the generation is updated during every commit. As older
942 * versions of btrfs are not aware of qgroups, it will be
943 * possible to detect inconsistencies by checking the
944 * generation on mount time
945 */
946 __le64 generation;
947
948 /* flag definitions see above */
949 __le64 flags;
950
951 /*
952 * only used during scanning to record the progress
953 * of the scan. It contains a logical address
954 */
955 __le64 scan;
956} __attribute__ ((__packed__));
957
958struct btrfs_qgroup_info_item {
959 __le64 generation;
960 __le64 rfer;
961 __le64 rfer_cmpr;
962 __le64 excl;
963 __le64 excl_cmpr;
964} __attribute__ ((__packed__));
965
966/* flags definition for qgroup limits */
967#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
968#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
969#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
970#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
971#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
972#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
973
974struct btrfs_qgroup_limit_item {
975 /*
976 * only updated when any of the other values change
977 */
978 __le64 flags;
979 __le64 max_rfer;
980 __le64 max_excl;
981 __le64 rsv_rfer;
982 __le64 rsv_excl;
983} __attribute__ ((__packed__));
984
Chris Mason6324fbf2008-03-24 15:01:59 -0400985struct btrfs_space_info {
986 u64 flags;
Josef Bacik6a632092009-02-20 11:00:09 -0500987
Josef Bacik89a55892010-10-14 14:52:27 -0400988 u64 total_bytes; /* total bytes in the space,
989 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400990 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -0700991 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -0500992 u64 bytes_pinned; /* total bytes pinned, will be freed when the
993 transaction finishes */
994 u64 bytes_reserved; /* total bytes the allocator has reserved for
995 current allocations */
996 u64 bytes_readonly; /* total bytes that are read only */
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400997
Josef Bacik6a632092009-02-20 11:00:09 -0500998 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400999 delalloc/allocations */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001000 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -04001001 u64 disk_total; /* total bytes on disk, takes mirrors into
1002 account */
Josef Bacik6a632092009-02-20 11:00:09 -05001003
Chris Mason36e39c42011-03-12 07:08:42 -05001004 /*
1005 * we bump reservation progress every time we decrement
1006 * bytes_reserved. This way people waiting for reservations
1007 * know something good has happened and they can check
1008 * for progress. The number here isn't to be trusted, it
1009 * just shows reclaim activity
1010 */
1011 unsigned long reservation_progress;
1012
David Sterba4ea02882011-05-12 18:13:12 +02001013 unsigned int full:1; /* indicates that we cannot allocate any more
Josef Bacik6a632092009-02-20 11:00:09 -05001014 chunks for this space */
David Sterba4ea02882011-05-12 18:13:12 +02001015 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
Josef Bacik6d741192011-04-11 20:20:11 -04001016
Josef Bacikfdb5eff2011-06-07 16:07:44 -04001017 unsigned int flush:1; /* set if we are trying to make space */
1018
David Sterba4ea02882011-05-12 18:13:12 +02001019 unsigned int force_alloc; /* set if we need to force a chunk
1020 alloc for this space */
Josef Bacik6a632092009-02-20 11:00:09 -05001021
Chris Mason6324fbf2008-03-24 15:01:59 -04001022 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001023
1024 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001025 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -04001026 spinlock_t lock;
Josef Bacik80eb2342008-10-29 14:49:05 -04001027 struct rw_semaphore groups_sem;
Josef Bacikfdb5eff2011-06-07 16:07:44 -04001028 wait_queue_head_t wait;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001029};
1030
Miao Xie66d8f3d2012-09-06 04:02:28 -06001031#define BTRFS_BLOCK_RSV_GLOBAL 1
1032#define BTRFS_BLOCK_RSV_DELALLOC 2
1033#define BTRFS_BLOCK_RSV_TRANS 3
1034#define BTRFS_BLOCK_RSV_CHUNK 4
1035#define BTRFS_BLOCK_RSV_DELOPS 5
1036#define BTRFS_BLOCK_RSV_EMPTY 6
1037#define BTRFS_BLOCK_RSV_TEMP 7
1038
Yan, Zhengf0486c62010-05-16 10:46:25 -04001039struct btrfs_block_rsv {
1040 u64 size;
1041 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001042 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001043 spinlock_t lock;
Miao Xie66d8f3d2012-09-06 04:02:28 -06001044 unsigned short full;
1045 unsigned short type;
1046 unsigned short failfast;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001047};
1048
Chris Masonfa9c0d792009-04-03 09:47:43 -04001049/*
1050 * free clusters are used to claim free space in relatively large chunks,
1051 * allowing us to do less seeky writes. They are used for all metadata
1052 * allocations and data allocations in ssd mode.
1053 */
1054struct btrfs_free_cluster {
1055 spinlock_t lock;
1056 spinlock_t refill_lock;
1057 struct rb_root root;
1058
1059 /* largest extent in this cluster */
1060 u64 max_size;
1061
1062 /* first extent starting offset */
1063 u64 window_start;
1064
1065 struct btrfs_block_group_cache *block_group;
1066 /*
1067 * when a cluster is allocated from a block group, we put the
1068 * cluster onto a list in the block group so that it can
1069 * be freed before the block group is freed.
1070 */
1071 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -04001072};
1073
Josef Bacik817d52f2009-07-13 21:29:25 -04001074enum btrfs_caching_type {
1075 BTRFS_CACHE_NO = 0,
1076 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -05001077 BTRFS_CACHE_FAST = 2,
1078 BTRFS_CACHE_FINISHED = 3,
Josef Bacik817d52f2009-07-13 21:29:25 -04001079};
1080
Josef Bacik0af3d002010-06-21 14:48:16 -04001081enum btrfs_disk_cache_state {
1082 BTRFS_DC_WRITTEN = 0,
1083 BTRFS_DC_ERROR = 1,
1084 BTRFS_DC_CLEAR = 2,
1085 BTRFS_DC_SETUP = 3,
1086 BTRFS_DC_NEED_WRITE = 4,
1087};
1088
Yan Zheng11833d62009-09-11 16:11:19 -04001089struct btrfs_caching_control {
1090 struct list_head list;
1091 struct mutex mutex;
1092 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001093 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -04001094 struct btrfs_block_group_cache *block_group;
1095 u64 progress;
1096 atomic_t count;
1097};
1098
Chris Mason9078a3e2007-04-26 16:46:15 -04001099struct btrfs_block_group_cache {
1100 struct btrfs_key key;
1101 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -04001102 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -04001103 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -04001104 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -05001105 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -04001106 u64 reserved;
Josef Bacik1b2da372009-09-11 16:11:20 -04001107 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -04001108 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -04001109 u64 sectorsize;
Josef Bacik5b0e95b2011-10-06 08:58:24 -04001110 u64 cache_generation;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +00001111 unsigned int ro:1;
1112 unsigned int dirty:1;
1113 unsigned int iref:1;
Josef Bacik0af3d002010-06-21 14:48:16 -04001114
1115 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001116
Josef Bacik817d52f2009-07-13 21:29:25 -04001117 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -04001118 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -04001119 struct btrfs_caching_control *caching_ctl;
1120 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -04001121
Josef Bacik0f9dd462008-09-23 13:14:11 -04001122 struct btrfs_space_info *space_info;
1123
1124 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +08001125 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001126
1127 /* block group cache stuff */
1128 struct rb_node cache_node;
1129
1130 /* for block groups in the same raid type */
1131 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -05001132
1133 /* usage count */
1134 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -04001135
1136 /* List of struct btrfs_free_clusters for this block group.
1137 * Today it will only have one thing on it, but that may change
1138 */
1139 struct list_head cluster_list;
Josef Bacikea658ba2012-09-11 16:57:25 -04001140
1141 /* For delayed block group creation */
1142 struct list_head new_bg_list;
Chris Mason9078a3e2007-04-26 16:46:15 -04001143};
Chris Mason0b86a832008-03-24 15:01:56 -04001144
Jan Schmidt097b8a72012-06-21 11:08:04 +02001145/* delayed seq elem */
1146struct seq_list {
1147 struct list_head list;
1148 u64 seq;
1149};
1150
1151/* fs_info */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001152struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -04001153struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -04001154struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001155struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +08001156struct btrfs_delayed_root;
Chris Mason9f5fae22007-03-20 14:38:32 -04001157struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -04001158 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -04001159 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -04001160 struct btrfs_root *extent_root;
1161 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -04001162 struct btrfs_root *chunk_root;
1163 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -05001164 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -05001165 struct btrfs_root *csum_root;
Arne Jansen416ac512011-09-13 12:56:09 +02001166 struct btrfs_root *quota_root;
Chris Masone02119d2008-09-05 16:13:11 -04001167
1168 /* the log root tree is a directory of all the other log roots */
1169 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001170
1171 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -04001172 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -04001173
Josef Bacik0f9dd462008-09-23 13:14:11 -04001174 /* block group cache stuff */
1175 spinlock_t block_group_cache_lock;
1176 struct rb_root block_group_cache_tree;
1177
Josef Bacik2bf64752011-09-26 17:12:22 -04001178 /* keep track of unallocated space */
1179 spinlock_t free_chunk_lock;
1180 u64 free_chunk_space;
1181
Yan Zheng11833d62009-09-11 16:11:19 -04001182 struct extent_io_tree freed_extents[2];
1183 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -04001184
Chris Mason0b86a832008-03-24 15:01:56 -04001185 /* logical->physical extent mapping */
1186 struct btrfs_mapping_tree mapping_tree;
1187
Miao Xie16cdcec2011-04-22 18:12:22 +08001188 /*
1189 * block reservation for extent, checksum, root tree and
1190 * delayed dir index item
1191 */
Yan, Zhengf0486c62010-05-16 10:46:25 -04001192 struct btrfs_block_rsv global_block_rsv;
1193 /* block reservation for delay allocation */
1194 struct btrfs_block_rsv delalloc_block_rsv;
1195 /* block reservation for metadata operations */
1196 struct btrfs_block_rsv trans_block_rsv;
1197 /* block reservation for chunk tree */
1198 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -04001199 /* block reservation for delayed operations */
1200 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001201
1202 struct btrfs_block_rsv empty_block_rsv;
1203
Chris Mason293ffd52007-03-20 15:57:25 -04001204 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -04001205 u64 last_trans_committed;
Chris Mason12fcfd22009-03-24 10:24:20 -04001206
1207 /*
1208 * this is updated to the current trans every time a full commit
1209 * is required instead of the faster short fsync log commits
1210 */
1211 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +02001212 unsigned long mount_opt;
Li Zefan261507a02010-12-17 14:21:50 +08001213 unsigned long compress_type:4;
Chris Mason6f568d32008-01-29 16:03:38 -05001214 u64 max_inline;
Chris Mason8f662a72008-01-02 10:01:11 -05001215 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -04001216 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001217 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -04001218 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -04001219 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -05001220 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -04001221
David Sterba6c417612011-04-13 15:41:04 +02001222 struct btrfs_super_block *super_copy;
1223 struct btrfs_super_block *super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -04001224 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -04001225 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -04001226 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -04001227 struct backing_dev_info bdi;
Chris Masone02119d2008-09-05 16:13:11 -04001228 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -04001229 struct mutex transaction_kthread_mutex;
1230 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -04001231 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -04001232 struct mutex volume_mutex;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001233 /*
1234 * this protects the ordered operations list only while we are
1235 * processing all of the entries on it. This way we make
1236 * sure the commit code doesn't find the list temporarily empty
1237 * because another function happens to be doing non-waiting preflush
1238 * before jumping into the main commit.
1239 */
1240 struct mutex ordered_operations_mutex;
Yan Zheng11833d62009-09-11 16:11:19 -04001241 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001242
Yan, Zhengc71bf092009-11-12 09:34:40 +00001243 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001244
Yan, Zhengc71bf092009-11-12 09:34:40 +00001245 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001246 struct srcu_struct subvol_srcu;
1247
Josef Bacika4abeea2011-04-11 17:25:13 -04001248 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -04001249 /*
1250 * the reloc mutex goes with the trans lock, it is taken
1251 * during commit to protect us from the relocation code
1252 */
1253 struct mutex reloc_mutex;
1254
Chris Mason8fd17792007-04-19 21:01:03 -04001255 struct list_head trans_list;
Chris Masonfacda1e2007-06-08 18:11:48 -04001256 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -04001257 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -04001258
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001259 spinlock_t delayed_iput_lock;
1260 struct list_head delayed_iputs;
1261
Jan Schmidtf29021b2012-05-16 17:55:38 +02001262 /* this protects tree_mod_seq_list */
1263 spinlock_t tree_mod_seq_lock;
1264 atomic_t tree_mod_seq;
1265 struct list_head tree_mod_seq_list;
Jan Schmidt097b8a72012-06-21 11:08:04 +02001266 struct seq_list tree_mod_seq_elem;
Jan Schmidtf29021b2012-05-16 17:55:38 +02001267
1268 /* this protects tree_mod_log */
1269 rwlock_t tree_mod_log_lock;
1270 struct rb_root tree_mod_log;
1271
Chris Masoncb03c742008-05-15 16:15:45 -04001272 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -04001273 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -04001274 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -05001275 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -04001276 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -04001277
Chris Mason8b712842008-06-11 16:50:36 -04001278 /*
Chris Mason3eaa2882008-07-24 11:57:52 -04001279 * this is used by the balancing code to wait for all the pending
1280 * ordered extents
1281 */
1282 spinlock_t ordered_extent_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001283
1284 /*
1285 * all of the data=ordered extents pending writeback
1286 * these can span multiple transactions and basically include
1287 * every dirty data page that isn't from nodatacow
1288 */
Chris Mason3eaa2882008-07-24 11:57:52 -04001289 struct list_head ordered_extents;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001290
1291 /*
1292 * all of the inodes that have delalloc bytes. It is possible for
1293 * this list to be empty even when there is still dirty data=ordered
1294 * extents waiting to finish IO.
1295 */
Chris Masonea8c2812008-08-04 23:17:27 -04001296 struct list_head delalloc_inodes;
Chris Mason3eaa2882008-07-24 11:57:52 -04001297
1298 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -04001299 * special rename and truncate targets that must be on disk before
1300 * we're allowed to commit. This is basically the ext3 style
1301 * data=ordered list.
1302 */
1303 struct list_head ordered_operations;
1304
1305 /*
Chris Mason8b712842008-06-11 16:50:36 -04001306 * there is a pool of worker threads for checksumming during writes
1307 * and a pool for checksumming after reads. This is because readers
1308 * can run with FS locks held, and the writers may be waiting for
1309 * those locks. We don't want ordering in the pending list to cause
1310 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -04001311 *
1312 * A third pool does submit_bio to avoid deadlocking with the other
1313 * two
Chris Mason8b712842008-06-11 16:50:36 -04001314 */
Chris Mason61d92c32009-10-02 19:11:56 -04001315 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -04001316 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -05001317 struct btrfs_workers delalloc_workers;
Chris Mason8b712842008-06-11 16:50:36 -04001318 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -05001319 struct btrfs_workers endio_meta_workers;
Chris Masoncad321a2008-12-17 14:51:42 -05001320 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001321 struct btrfs_workers endio_write_workers;
Josef Bacik0cb59c92010-07-02 12:14:14 -04001322 struct btrfs_workers endio_freespace_worker;
Chris Mason1cc127b2008-06-12 14:46:17 -04001323 struct btrfs_workers submit_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001324 struct btrfs_workers caching_workers;
Arne Jansen90519d62011-05-23 14:30:00 +02001325 struct btrfs_workers readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001326
Chris Mason247e7432008-07-17 12:53:51 -04001327 /*
1328 * fixup workers take dirty pages that didn't properly go through
1329 * the cow mechanism and make them safe to write. It happens
1330 * for the sys_munmap function call path
1331 */
1332 struct btrfs_workers fixup_workers;
Miao Xie16cdcec2011-04-22 18:12:22 +08001333 struct btrfs_workers delayed_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001334 struct task_struct *transaction_kthread;
1335 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001336 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001337
Josef Bacik58176a92007-08-29 15:47:34 -04001338 struct kobject super_kobj;
1339 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -04001340 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001341 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001342 int log_root_recovering;
Yan, Zhenga22285a2010-05-16 10:48:46 -04001343 int enospc_unlink;
Josef Bacika4abeea2011-04-11 17:25:13 -04001344 int trans_no_join;
Chris Mason62e27492007-03-15 12:56:47 -04001345
Yan324ae4d2007-11-16 14:57:08 -05001346 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001347
1348 /* protected by the delalloc lock, used to keep from writing
1349 * metadata until there is a nice batch
1350 */
1351 u64 dirty_metadata_bytes;
Chris Mason0b86a832008-03-24 15:01:56 -04001352 struct list_head dirty_cowonly_roots;
1353
Chris Mason8a4b83c2008-03-24 15:02:07 -04001354 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001355
1356 /*
1357 * the space_info list is almost entirely read only. It only changes
1358 * when we add a new raid type to the FS, and that happens
1359 * very rarely. RCU is used to protect it.
1360 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001361 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001362
Li Zefanb4d7c3c2012-07-09 20:21:07 -06001363 struct btrfs_space_info *data_sinfo;
1364
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001365 struct reloc_control *reloc_ctl;
1366
Chris Mason1832a6d2007-12-21 16:27:21 -05001367 spinlock_t delalloc_lock;
1368 u64 delalloc_bytes;
Chris Masonfa9c0d792009-04-03 09:47:43 -04001369
1370 /* data_alloc_cluster is only used in ssd mode */
1371 struct btrfs_free_cluster data_alloc_cluster;
1372
1373 /* all metadata allocations go through this cluster */
1374 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001375
Chris Mason4cb53002011-05-24 15:35:30 -04001376 /* auto defrag inodes go here */
1377 spinlock_t defrag_inodes_lock;
1378 struct rb_root defrag_inodes;
1379 atomic_t defrag_running;
1380
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001381 /*
1382 * these three are in extended format (availability of single
1383 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1384 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1385 */
Chris Masond18a2c42008-04-04 15:40:00 -04001386 u64 avail_data_alloc_bits;
1387 u64 avail_metadata_alloc_bits;
1388 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -04001389
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001390 /* restriper state */
1391 spinlock_t balance_lock;
1392 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001393 atomic_t balance_running;
1394 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +02001395 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001396 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001397 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001398
Josef Bacik97e728d2009-04-21 17:40:57 -04001399 unsigned data_chunk_allocations;
1400 unsigned metadata_ratio;
1401
Chris Mason788f20e2008-04-28 15:29:42 -04001402 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001403
Arne Jansena2de7332011-03-08 14:14:00 +01001404 /* private scrub information */
1405 struct mutex scrub_lock;
1406 atomic_t scrubs_running;
1407 atomic_t scrub_pause_req;
1408 atomic_t scrubs_paused;
1409 atomic_t scrub_cancel_req;
1410 wait_queue_head_t scrub_pause_wait;
1411 struct rw_semaphore scrub_super_lock;
1412 int scrub_workers_refcnt;
1413 struct btrfs_workers scrub_workers;
1414
Stefan Behrens21adbd52011-11-09 13:44:05 +01001415#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1416 u32 check_integrity_print_mask;
1417#endif
Arne Jansen416ac512011-09-13 12:56:09 +02001418 /*
1419 * quota information
1420 */
1421 unsigned int quota_enabled:1;
1422
1423 /*
1424 * quota_enabled only changes state after a commit. This holds the
1425 * next state.
1426 */
1427 unsigned int pending_quota_state:1;
1428
1429 /* is qgroup tracking in a consistent state? */
1430 u64 qgroup_flags;
1431
1432 /* holds configuration and tracking. Protected by qgroup_lock */
1433 struct rb_root qgroup_tree;
1434 spinlock_t qgroup_lock;
1435
1436 /* list of dirty qgroups to be written at next commit */
1437 struct list_head dirty_qgroups;
1438
1439 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1440 u64 qgroup_seq;
Stefan Behrens21adbd52011-11-09 13:44:05 +01001441
liuboacce9522011-01-06 19:30:25 +08001442 /* filesystem state */
1443 u64 fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001444
1445 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001446
Arne Jansen90519d62011-05-23 14:30:00 +02001447 /* readahead tree */
1448 spinlock_t reada_lock;
1449 struct radix_tree_root reada_tree;
Chris Mason531f4b1a2011-11-06 03:05:08 -05001450
Chris Masonaf31f5e2011-11-03 15:17:42 -04001451 /* next backup root to be overwritten */
1452 int backup_root_index;
Yan324ae4d2007-11-16 14:57:08 -05001453};
Chris Mason0b86a832008-03-24 15:01:56 -04001454
Chris Mason62e27492007-03-15 12:56:47 -04001455/*
1456 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001457 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001458 */
1459struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001460 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001461
Chris Mason5f39d392007-10-15 16:14:19 -04001462 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001463 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001464 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001465
Chris Mason62e27492007-03-15 12:56:47 -04001466 struct btrfs_root_item root_item;
1467 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001468 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001469 struct extent_io_tree dirty_log_pages;
1470
Josef Bacik58176a92007-08-29 15:47:34 -04001471 struct kobject root_kobj;
1472 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001473 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001474
Yan, Zhengf0486c62010-05-16 10:46:25 -04001475 spinlock_t accounting_lock;
1476 struct btrfs_block_rsv *block_rsv;
1477
Li Zefan581bb052011-04-20 10:06:11 +08001478 /* free ino cache stuff */
1479 struct mutex fs_commit_mutex;
1480 struct btrfs_free_space_ctl *free_ino_ctl;
1481 enum btrfs_caching_type cached;
1482 spinlock_t cache_lock;
1483 wait_queue_head_t cache_wait;
1484 struct btrfs_free_space_ctl *free_ino_pinned;
1485 u64 cache_progress;
Li Zefan82d59022011-04-20 10:33:24 +08001486 struct inode *cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001487
Chris Masone02119d2008-09-05 16:13:11 -04001488 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001489 wait_queue_head_t log_writer_wait;
1490 wait_queue_head_t log_commit_wait[2];
1491 atomic_t log_writers;
1492 atomic_t log_commit[2];
Miao Xie2ecb7922012-09-06 04:04:27 -06001493 atomic_t log_batch;
Yan Zheng7237f182009-01-21 12:54:03 -05001494 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001495 unsigned long last_log_commit;
Josef Bacikff782e02009-10-08 15:30:04 -04001496 pid_t log_start_pid;
1497 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001498
Chris Mason0f7d52f2007-04-09 10:42:37 -04001499 u64 objectid;
1500 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001501
1502 /* data allocations are done in sectorsize units */
1503 u32 sectorsize;
1504
1505 /* node allocations are done in nodesize units */
1506 u32 nodesize;
1507
1508 /* leaf allocations are done in leafsize units */
1509 u32 leafsize;
1510
Chris Mason87ee04e2007-11-30 11:30:34 -05001511 u32 stripesize;
1512
Chris Mason9f5fae22007-03-20 14:38:32 -04001513 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001514
1515 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001516
1517 /* btrfs_record_root_in_trans is a multi-step process,
1518 * and it can race with the balancing code. But the
1519 * race is very small, and only the first time the root
1520 * is added to each transaction. So in_trans_setup
1521 * is used to tell us when more checks are required
1522 */
1523 unsigned long in_trans_setup;
Chris Mason9f3a7422007-08-07 15:52:19 -04001524 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001525 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001526 int in_radix;
1527
Chris Mason3f157a22008-06-25 16:01:31 -04001528 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001529 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001530 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001531 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001532 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001533
1534 /* the dirty list is only used by non-reference counted roots */
1535 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001536
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001537 struct list_head root_list;
1538
Yan, Zhengd68fc572010-05-16 10:49:58 -04001539 spinlock_t orphan_lock;
Josef Bacik8a35d952012-05-23 14:26:42 -04001540 atomic_t orphan_inodes;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001541 struct btrfs_block_rsv *orphan_block_rsv;
1542 int orphan_item_inserted;
1543 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001544
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001545 spinlock_t inode_lock;
1546 /* red-black tree that keeps track of in-memory inodes */
1547 struct rb_root inode_tree;
1548
Chris Mason3394e162008-11-17 20:42:26 -05001549 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001550 * radix tree that keeps track of delayed nodes of every inode,
1551 * protected by inode_lock
1552 */
1553 struct radix_tree_root delayed_nodes_tree;
1554 /*
Chris Mason3394e162008-11-17 20:42:26 -05001555 * right now this just gets used so that a root has its own devid
1556 * for stat. It may be used for more later
1557 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001558 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001559
1560 int force_cow;
Alexander Block8ea05e32012-07-25 17:35:53 +02001561
1562 spinlock_t root_times_lock;
Chris Mason62e27492007-03-15 12:56:47 -04001563};
1564
Chris Mason4cb53002011-05-24 15:35:30 -04001565struct btrfs_ioctl_defrag_range_args {
1566 /* start of the defrag operation */
1567 __u64 start;
1568
1569 /* number of bytes to defrag, use (u64)-1 to say all */
1570 __u64 len;
1571
1572 /*
1573 * flags for the operation, which can include turning
1574 * on compression for this one defrag
1575 */
1576 __u64 flags;
1577
1578 /*
1579 * any extent bigger than this will be considered
1580 * already defragged. Use 0 to take the kernel default
1581 * Use 1 to say every single extent must be rewritten
1582 */
1583 __u32 extent_thresh;
1584
1585 /*
1586 * which compression method to use if turning on compression
1587 * for this defrag operation. If unspecified, zlib will
1588 * be used
1589 */
1590 __u32 compress_type;
1591
1592 /* spare for later */
1593 __u32 unused[4];
1594};
1595
1596
Chris Mason1e1d2702007-03-15 19:03:33 -04001597/*
1598 * inode items have the data typically returned from stat and store other
1599 * info about object characteristics. There is one for every file and dir in
1600 * the FS
1601 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001602#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001603#define BTRFS_INODE_REF_KEY 12
1604#define BTRFS_XATTR_ITEM_KEY 24
1605#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001606/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001607
1608/*
1609 * dir items are the name -> inode pointers in a directory. There is one
1610 * for every name in a directory.
1611 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001612#define BTRFS_DIR_LOG_ITEM_KEY 60
1613#define BTRFS_DIR_LOG_INDEX_KEY 72
1614#define BTRFS_DIR_ITEM_KEY 84
1615#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001616/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001617 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001618 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001619#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001620
Chris Mason1e1d2702007-03-15 19:03:33 -04001621/*
Chris Masond20f7042008-12-08 16:58:54 -05001622 * extent csums are stored in a separate tree and hold csums for
1623 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001624 */
Chris Masond20f7042008-12-08 16:58:54 -05001625#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001626
1627/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001628 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001629 * tree used by the super block to find all the other trees
1630 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001631#define BTRFS_ROOT_ITEM_KEY 132
1632
1633/*
1634 * root backrefs tie subvols and snapshots to the directory entries that
1635 * reference them
1636 */
1637#define BTRFS_ROOT_BACKREF_KEY 144
1638
1639/*
1640 * root refs make a fast index for listing all of the snapshots and
1641 * subvolumes referenced by a given root. They point directly to the
1642 * directory item in the root that references the subvol
1643 */
1644#define BTRFS_ROOT_REF_KEY 156
1645
Chris Mason1e1d2702007-03-15 19:03:33 -04001646/*
1647 * extent items are in the extent map tree. These record which blocks
1648 * are used, and how many references there are to each block
1649 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001650#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001651
1652#define BTRFS_TREE_BLOCK_REF_KEY 176
1653
1654#define BTRFS_EXTENT_DATA_REF_KEY 178
1655
1656#define BTRFS_EXTENT_REF_V0_KEY 180
1657
1658#define BTRFS_SHARED_BLOCK_REF_KEY 182
1659
1660#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001661
1662/*
1663 * block groups give us hints into the extent allocation trees. Which
1664 * blocks are free etc etc
1665 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001666#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001667
Chris Mason0660b5a2008-11-17 20:37:39 -05001668#define BTRFS_DEV_EXTENT_KEY 204
1669#define BTRFS_DEV_ITEM_KEY 216
1670#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001671
Arne Jansen630dc772011-09-13 11:06:07 +02001672/*
1673 * Records the overall state of the qgroups.
1674 * There's only one instance of this key present,
1675 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1676 */
1677#define BTRFS_QGROUP_STATUS_KEY 240
1678/*
1679 * Records the currently used space of the qgroup.
1680 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1681 */
1682#define BTRFS_QGROUP_INFO_KEY 242
1683/*
1684 * Contains the user configured limits for the qgroup.
1685 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1686 */
1687#define BTRFS_QGROUP_LIMIT_KEY 244
1688/*
1689 * Records the child-parent relationship of qgroups. For
1690 * each relation, 2 keys are present:
1691 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1692 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1693 */
1694#define BTRFS_QGROUP_RELATION_KEY 246
1695
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02001696#define BTRFS_BALANCE_ITEM_KEY 248
1697
Chris Mason9f5fae22007-03-20 14:38:32 -04001698/*
Stefan Behrens733f4fb2012-05-25 16:06:10 +02001699 * Persistantly stores the io stats in the device tree.
1700 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1701 */
1702#define BTRFS_DEV_STATS_KEY 249
1703
1704/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001705 * string items are for debugging. They just store a short string of
1706 * data in the FS
1707 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001708#define BTRFS_STRING_ITEM_KEY 253
1709
David Sterba0942caa2011-06-28 15:10:37 +00001710/*
1711 * Flags for mount options.
1712 *
1713 * Note: don't forget to add new options to btrfs_show_options()
1714 */
Chris Mason21ad10c2008-01-09 09:23:21 -05001715#define BTRFS_MOUNT_NODATASUM (1 << 0)
1716#define BTRFS_MOUNT_NODATACOW (1 << 1)
1717#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001718#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001719#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001720#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001721#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001722#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001723#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001724#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001725#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05001726#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04001727#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04001728#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04001729#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05001730#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04001731#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04001732#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Chris Masonaf31f5e2011-11-03 15:17:42 -04001733#define BTRFS_MOUNT_RECOVERY (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02001734#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05001735#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1736#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04001737#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001738
1739#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1740#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1741#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1742 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05001743/*
1744 * Inode flags
1745 */
Yanfdebe2b2008-01-14 13:26:08 -05001746#define BTRFS_INODE_NODATASUM (1 << 0)
1747#define BTRFS_INODE_NODATACOW (1 << 1)
1748#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001749#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001750#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001751#define BTRFS_INODE_SYNC (1 << 5)
1752#define BTRFS_INODE_IMMUTABLE (1 << 6)
1753#define BTRFS_INODE_APPEND (1 << 7)
1754#define BTRFS_INODE_NODUMP (1 << 8)
1755#define BTRFS_INODE_NOATIME (1 << 9)
1756#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00001757#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001758
Li Zefan08fe4db2011-03-28 02:01:25 +00001759#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1760
Chris Masoncfed81a2012-03-03 07:40:03 -05001761struct btrfs_map_token {
1762 struct extent_buffer *eb;
1763 char *kaddr;
1764 unsigned long offset;
1765};
1766
1767static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1768{
1769 memset(token, 0, sizeof(*token));
1770}
1771
Chris Mason5f39d392007-10-15 16:14:19 -04001772/* some macros to generate set/get funcs for the struct fields. This
1773 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1774 * one for u8:
1775 */
1776#define le8_to_cpu(v) (v)
1777#define cpu_to_le8(v) (v)
1778#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001779
Chris Mason5f39d392007-10-15 16:14:19 -04001780#define read_eb_member(eb, ptr, type, member, result) ( \
1781 read_extent_buffer(eb, (char *)(result), \
1782 ((unsigned long)(ptr)) + \
1783 offsetof(type, member), \
1784 sizeof(((type *)0)->member)))
1785
1786#define write_eb_member(eb, ptr, type, member, result) ( \
1787 write_extent_buffer(eb, (char *)(result), \
1788 ((unsigned long)(ptr)) + \
1789 offsetof(type, member), \
1790 sizeof(((type *)0)->member)))
1791
Li Zefan18077bb2012-07-09 20:22:35 -06001792#define DECLARE_BTRFS_SETGET_BITS(bits) \
1793u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1794 unsigned long off, \
1795 struct btrfs_map_token *token); \
1796void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1797 unsigned long off, u##bits val, \
1798 struct btrfs_map_token *token); \
1799static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1800 unsigned long off) \
1801{ \
1802 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1803} \
1804static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1805 unsigned long off, u##bits val) \
1806{ \
1807 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1808}
1809
1810DECLARE_BTRFS_SETGET_BITS(8)
1811DECLARE_BTRFS_SETGET_BITS(16)
1812DECLARE_BTRFS_SETGET_BITS(32)
1813DECLARE_BTRFS_SETGET_BITS(64)
1814
Chris Mason5f39d392007-10-15 16:14:19 -04001815#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Li Zefan18077bb2012-07-09 20:22:35 -06001816static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1817{ \
1818 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1819 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1820} \
1821static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1822 u##bits val) \
1823{ \
1824 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1825 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1826} \
1827static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1828 struct btrfs_map_token *token) \
1829{ \
1830 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1831 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1832} \
1833static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1834 type *s, u##bits val, \
1835 struct btrfs_map_token *token) \
1836{ \
1837 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1838 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1839}
Chris Mason9078a3e2007-04-26 16:46:15 -04001840
Chris Mason5f39d392007-10-15 16:14:19 -04001841#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1842static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1843{ \
Chris Mason727011e2010-08-06 13:21:20 -04001844 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001845 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04001846 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001847} \
1848static inline void btrfs_set_##name(struct extent_buffer *eb, \
1849 u##bits val) \
1850{ \
Chris Mason727011e2010-08-06 13:21:20 -04001851 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001852 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001853}
Chris Mason1e1d2702007-03-15 19:03:33 -04001854
Chris Mason5f39d392007-10-15 16:14:19 -04001855#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1856static inline u##bits btrfs_##name(type *s) \
1857{ \
1858 return le##bits##_to_cpu(s->member); \
1859} \
1860static inline void btrfs_set_##name(type *s, u##bits val) \
1861{ \
1862 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001863}
1864
Chris Mason0b86a832008-03-24 15:01:56 -04001865BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1866BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1867BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1868BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1869BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001870BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1871 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001872BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1873BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001874BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1875BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1876BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001877BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001878
Chris Mason8a4b83c2008-03-24 15:02:07 -04001879BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1880BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1881 total_bytes, 64);
1882BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1883 bytes_used, 64);
1884BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1885 io_align, 32);
1886BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1887 io_width, 32);
1888BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1889 sector_size, 32);
1890BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001891BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1892 dev_group, 32);
1893BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1894 seek_speed, 8);
1895BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1896 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001897BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1898 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001899
Chris Mason0b86a832008-03-24 15:01:56 -04001900static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1901{
1902 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1903}
1904
Yan Zheng2b820322008-11-17 21:11:30 -05001905static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1906{
1907 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1908}
1909
Chris Masone17cade2008-04-15 15:41:47 -04001910BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001911BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1912BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1913BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1914BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1915BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1916BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1917BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001918BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001919BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1920BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1921
Chris Masone17cade2008-04-15 15:41:47 -04001922static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1923{
1924 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1925}
1926
1927BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001928BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1929BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1930 stripe_len, 64);
1931BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1932 io_align, 32);
1933BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1934 io_width, 32);
1935BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1936 sector_size, 32);
1937BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1938BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1939 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001940BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1941 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001942BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1943BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1944
1945static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1946 int nr)
1947{
1948 unsigned long offset = (unsigned long)c;
1949 offset += offsetof(struct btrfs_chunk, stripe);
1950 offset += nr * sizeof(struct btrfs_stripe);
1951 return (struct btrfs_stripe *)offset;
1952}
1953
Chris Masona4437552008-04-18 10:29:38 -04001954static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1955{
1956 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1957}
1958
Chris Mason0b86a832008-03-24 15:01:56 -04001959static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1960 struct btrfs_chunk *c, int nr)
1961{
1962 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1963}
1964
Chris Mason0b86a832008-03-24 15:01:56 -04001965static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1966 struct btrfs_chunk *c, int nr)
1967{
1968 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1969}
1970
Chris Mason5f39d392007-10-15 16:14:19 -04001971/* struct btrfs_block_group_item */
1972BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1973 used, 64);
1974BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1975 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001976BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1977 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001978
1979BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001980 struct btrfs_block_group_item, chunk_objectid, 64);
1981BTRFS_SETGET_FUNCS(disk_block_group_flags,
1982 struct btrfs_block_group_item, flags, 64);
1983BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1984 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001985
Chris Mason39544012007-12-12 14:38:19 -05001986/* struct btrfs_inode_ref */
1987BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001988BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001989
Chris Mason5f39d392007-10-15 16:14:19 -04001990/* struct btrfs_inode_item */
1991BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001992BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001993BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001994BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001995BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001996BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1997BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1998BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1999BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2000BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04002001BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002002BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002003
Chris Mason0b86a832008-03-24 15:01:56 -04002004static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002005btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002006{
Chris Mason5f39d392007-10-15 16:14:19 -04002007 unsigned long ptr = (unsigned long)inode_item;
2008 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04002009 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002010}
2011
Chris Mason0b86a832008-03-24 15:01:56 -04002012static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002013btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002014{
Chris Mason5f39d392007-10-15 16:14:19 -04002015 unsigned long ptr = (unsigned long)inode_item;
2016 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04002017 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002018}
2019
Chris Mason0b86a832008-03-24 15:01:56 -04002020static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002021btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002022{
Chris Mason5f39d392007-10-15 16:14:19 -04002023 unsigned long ptr = (unsigned long)inode_item;
2024 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04002025 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002026}
2027
Chris Mason0b86a832008-03-24 15:01:56 -04002028BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2029BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002030
Chris Mason0b86a832008-03-24 15:01:56 -04002031/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04002032BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2033 chunk_tree, 64);
2034BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2035 chunk_objectid, 64);
2036BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2037 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002038BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2039
Chris Masone17cade2008-04-15 15:41:47 -04002040static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2041{
2042 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2043 return (u8 *)((unsigned long)dev + ptr);
2044}
2045
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002046BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2047BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2048 generation, 64);
2049BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002050
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002051BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002052
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002053
2054BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2055
2056static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2057 struct btrfs_tree_block_info *item,
2058 struct btrfs_disk_key *key)
2059{
2060 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2061}
2062
2063static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2064 struct btrfs_tree_block_info *item,
2065 struct btrfs_disk_key *key)
2066{
2067 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2068}
2069
2070BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2071 root, 64);
2072BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2073 objectid, 64);
2074BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2075 offset, 64);
2076BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2077 count, 32);
2078
2079BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2080 count, 32);
2081
2082BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2083 type, 8);
2084BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2085 offset, 64);
2086
2087static inline u32 btrfs_extent_inline_ref_size(int type)
2088{
2089 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2090 type == BTRFS_SHARED_BLOCK_REF_KEY)
2091 return sizeof(struct btrfs_extent_inline_ref);
2092 if (type == BTRFS_SHARED_DATA_REF_KEY)
2093 return sizeof(struct btrfs_shared_data_ref) +
2094 sizeof(struct btrfs_extent_inline_ref);
2095 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2096 return sizeof(struct btrfs_extent_data_ref) +
2097 offsetof(struct btrfs_extent_inline_ref, offset);
2098 BUG();
2099 return 0;
2100}
2101
2102BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2103BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2104 generation, 64);
2105BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2106BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002107
2108/* struct btrfs_node */
2109BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002110BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002111
2112static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002113{
Chris Mason5f39d392007-10-15 16:14:19 -04002114 unsigned long ptr;
2115 ptr = offsetof(struct btrfs_node, ptrs) +
2116 sizeof(struct btrfs_key_ptr) * nr;
2117 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002118}
2119
Chris Mason5f39d392007-10-15 16:14:19 -04002120static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2121 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04002122{
Chris Mason5f39d392007-10-15 16:14:19 -04002123 unsigned long ptr;
2124 ptr = offsetof(struct btrfs_node, ptrs) +
2125 sizeof(struct btrfs_key_ptr) * nr;
2126 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04002127}
2128
Chris Mason74493f72007-12-11 09:25:06 -05002129static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2130{
2131 unsigned long ptr;
2132 ptr = offsetof(struct btrfs_node, ptrs) +
2133 sizeof(struct btrfs_key_ptr) * nr;
2134 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2135}
2136
2137static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2138 int nr, u64 val)
2139{
2140 unsigned long ptr;
2141 ptr = offsetof(struct btrfs_node, ptrs) +
2142 sizeof(struct btrfs_key_ptr) * nr;
2143 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2144}
2145
Chris Mason810191f2007-10-15 16:18:55 -04002146static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04002147{
Chris Mason5f39d392007-10-15 16:14:19 -04002148 return offsetof(struct btrfs_node, ptrs) +
2149 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04002150}
2151
Chris Masone644d022007-11-06 15:09:29 -05002152void btrfs_node_key(struct extent_buffer *eb,
2153 struct btrfs_disk_key *disk_key, int nr);
2154
Chris Mason5f39d392007-10-15 16:14:19 -04002155static inline void btrfs_set_node_key(struct extent_buffer *eb,
2156 struct btrfs_disk_key *disk_key, int nr)
2157{
2158 unsigned long ptr;
2159 ptr = btrfs_node_key_ptr_offset(nr);
2160 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2161 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002162}
2163
Chris Mason5f39d392007-10-15 16:14:19 -04002164/* struct btrfs_item */
2165BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2166BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2167
2168static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002169{
Chris Mason5f39d392007-10-15 16:14:19 -04002170 return offsetof(struct btrfs_leaf, items) +
2171 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002172}
2173
Chris Mason5f39d392007-10-15 16:14:19 -04002174static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2175 int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002176{
Chris Mason5f39d392007-10-15 16:14:19 -04002177 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002178}
2179
Chris Mason5f39d392007-10-15 16:14:19 -04002180static inline u32 btrfs_item_end(struct extent_buffer *eb,
2181 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002182{
Chris Mason5f39d392007-10-15 16:14:19 -04002183 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04002184}
2185
Chris Mason5f39d392007-10-15 16:14:19 -04002186static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002187{
Chris Mason5f39d392007-10-15 16:14:19 -04002188 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002189}
2190
Chris Mason5f39d392007-10-15 16:14:19 -04002191static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002192{
Chris Mason5f39d392007-10-15 16:14:19 -04002193 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002194}
2195
Chris Mason5f39d392007-10-15 16:14:19 -04002196static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002197{
Chris Mason5f39d392007-10-15 16:14:19 -04002198 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002199}
2200
Chris Mason5f39d392007-10-15 16:14:19 -04002201static inline void btrfs_item_key(struct extent_buffer *eb,
2202 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002203{
Chris Mason5f39d392007-10-15 16:14:19 -04002204 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2205 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002206}
2207
Chris Mason5f39d392007-10-15 16:14:19 -04002208static inline void btrfs_set_item_key(struct extent_buffer *eb,
2209 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002210{
Chris Mason5f39d392007-10-15 16:14:19 -04002211 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2212 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002213}
2214
Chris Masone02119d2008-09-05 16:13:11 -04002215BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2216
Chris Mason0660b5a2008-11-17 20:37:39 -05002217/*
2218 * struct btrfs_root_ref
2219 */
2220BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2221BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2222BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2223
Chris Mason5f39d392007-10-15 16:14:19 -04002224/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05002225BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04002226BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2227BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04002228BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002229
2230static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2231 struct btrfs_dir_item *item,
2232 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002233{
Chris Mason5f39d392007-10-15 16:14:19 -04002234 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002235}
2236
Chris Mason5f39d392007-10-15 16:14:19 -04002237static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2238 struct btrfs_dir_item *item,
2239 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002240{
Chris Mason5f39d392007-10-15 16:14:19 -04002241 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002242}
2243
Josef Bacik0af3d002010-06-21 14:48:16 -04002244BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2245 num_entries, 64);
2246BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2247 num_bitmaps, 64);
2248BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2249 generation, 64);
2250
2251static inline void btrfs_free_space_key(struct extent_buffer *eb,
2252 struct btrfs_free_space_header *h,
2253 struct btrfs_disk_key *key)
2254{
2255 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2256}
2257
2258static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2259 struct btrfs_free_space_header *h,
2260 struct btrfs_disk_key *key)
2261{
2262 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2263}
2264
Chris Mason5f39d392007-10-15 16:14:19 -04002265/* struct btrfs_disk_key */
2266BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2267 objectid, 64);
2268BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2269BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04002270
Chris Masone2fa7222007-03-12 16:22:34 -04002271static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2272 struct btrfs_disk_key *disk)
2273{
2274 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002275 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002276 cpu->objectid = le64_to_cpu(disk->objectid);
2277}
2278
2279static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2280 struct btrfs_key *cpu)
2281{
2282 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002283 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002284 disk->objectid = cpu_to_le64(cpu->objectid);
2285}
2286
Chris Mason5f39d392007-10-15 16:14:19 -04002287static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2288 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002289{
Chris Mason5f39d392007-10-15 16:14:19 -04002290 struct btrfs_disk_key disk_key;
2291 btrfs_node_key(eb, &disk_key, nr);
2292 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002293}
2294
Chris Mason5f39d392007-10-15 16:14:19 -04002295static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2296 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002297{
Chris Mason5f39d392007-10-15 16:14:19 -04002298 struct btrfs_disk_key disk_key;
2299 btrfs_item_key(eb, &disk_key, nr);
2300 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002301}
2302
Chris Mason5f39d392007-10-15 16:14:19 -04002303static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2304 struct btrfs_dir_item *item,
2305 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002306{
Chris Mason5f39d392007-10-15 16:14:19 -04002307 struct btrfs_disk_key disk_key;
2308 btrfs_dir_item_key(eb, item, &disk_key);
2309 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002310}
2311
Chris Mason5f39d392007-10-15 16:14:19 -04002312
2313static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002314{
Chris Mason5f39d392007-10-15 16:14:19 -04002315 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002316}
2317
Chris Mason5f39d392007-10-15 16:14:19 -04002318static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002319{
Chris Mason5f39d392007-10-15 16:14:19 -04002320 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002321}
2322
Chris Mason5f39d392007-10-15 16:14:19 -04002323/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002324BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002325BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2326 generation, 64);
2327BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2328BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002329BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002330BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2331
Chris Mason63b10fc2008-04-01 11:21:32 -04002332static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2333{
2334 return (btrfs_header_flags(eb) & flag) == flag;
2335}
2336
2337static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2338{
2339 u64 flags = btrfs_header_flags(eb);
2340 btrfs_set_header_flags(eb, flags | flag);
2341 return (flags & flag) == flag;
2342}
2343
2344static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2345{
2346 u64 flags = btrfs_header_flags(eb);
2347 btrfs_set_header_flags(eb, flags & ~flag);
2348 return (flags & flag) == flag;
2349}
2350
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002351static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2352{
2353 u64 flags = btrfs_header_flags(eb);
2354 return flags >> BTRFS_BACKREF_REV_SHIFT;
2355}
2356
2357static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2358 int rev)
2359{
2360 u64 flags = btrfs_header_flags(eb);
2361 flags &= ~BTRFS_BACKREF_REV_MASK;
2362 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2363 btrfs_set_header_flags(eb, flags);
2364}
2365
Chris Mason5f39d392007-10-15 16:14:19 -04002366static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
Chris Masone2fa7222007-03-12 16:22:34 -04002367{
Chris Mason5f39d392007-10-15 16:14:19 -04002368 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2369 return (u8 *)ptr;
Chris Masone2fa7222007-03-12 16:22:34 -04002370}
2371
Chris Masone17cade2008-04-15 15:41:47 -04002372static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2373{
2374 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2375 return (u8 *)ptr;
2376}
2377
Chris Mason5f39d392007-10-15 16:14:19 -04002378static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002379{
Chris Masond3977122009-01-05 21:25:51 -05002380 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002381}
2382
Chris Mason5f39d392007-10-15 16:14:19 -04002383/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002384BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2385 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002386BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002387BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2388BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002389
Yan Zheng84234f32008-10-29 14:49:05 -04002390BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2391 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002392BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2393BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002394BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2395BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002396BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002397BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2398BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002399BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2400 last_snapshot, 64);
Alexander Block8ea05e32012-07-25 17:35:53 +02002401BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2402 generation_v2, 64);
2403BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2404 ctransid, 64);
2405BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2406 otransid, 64);
2407BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2408 stransid, 64);
2409BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2410 rtransid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002411
Li Zefanb83cc962010-12-20 16:04:08 +08002412static inline bool btrfs_root_readonly(struct btrfs_root *root)
2413{
Al Viro6ed3cf22012-04-13 11:49:04 -04002414 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002415}
2416
Chris Masonaf31f5e2011-11-03 15:17:42 -04002417/* struct btrfs_root_backup */
2418BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2419 tree_root, 64);
2420BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2421 tree_root_gen, 64);
2422BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2423 tree_root_level, 8);
2424
2425BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2426 chunk_root, 64);
2427BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2428 chunk_root_gen, 64);
2429BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2430 chunk_root_level, 8);
2431
2432BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2433 extent_root, 64);
2434BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2435 extent_root_gen, 64);
2436BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2437 extent_root_level, 8);
2438
2439BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2440 fs_root, 64);
2441BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2442 fs_root_gen, 64);
2443BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2444 fs_root_level, 8);
2445
2446BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2447 dev_root, 64);
2448BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2449 dev_root_gen, 64);
2450BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2451 dev_root_level, 8);
2452
2453BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2454 csum_root, 64);
2455BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2456 csum_root_gen, 64);
2457BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2458 csum_root_level, 8);
2459BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2460 total_bytes, 64);
2461BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2462 bytes_used, 64);
2463BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2464 num_devices, 64);
2465
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002466/* struct btrfs_balance_item */
2467BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002468
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002469static inline void btrfs_balance_data(struct extent_buffer *eb,
2470 struct btrfs_balance_item *bi,
2471 struct btrfs_disk_balance_args *ba)
2472{
2473 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2474}
2475
2476static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2477 struct btrfs_balance_item *bi,
2478 struct btrfs_disk_balance_args *ba)
2479{
2480 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2481}
2482
2483static inline void btrfs_balance_meta(struct extent_buffer *eb,
2484 struct btrfs_balance_item *bi,
2485 struct btrfs_disk_balance_args *ba)
2486{
2487 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2488}
2489
2490static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2491 struct btrfs_balance_item *bi,
2492 struct btrfs_disk_balance_args *ba)
2493{
2494 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2495}
2496
2497static inline void btrfs_balance_sys(struct extent_buffer *eb,
2498 struct btrfs_balance_item *bi,
2499 struct btrfs_disk_balance_args *ba)
2500{
2501 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2502}
2503
2504static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2505 struct btrfs_balance_item *bi,
2506 struct btrfs_disk_balance_args *ba)
2507{
2508 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2509}
2510
2511static inline void
2512btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2513 struct btrfs_disk_balance_args *disk)
2514{
2515 memset(cpu, 0, sizeof(*cpu));
2516
2517 cpu->profiles = le64_to_cpu(disk->profiles);
2518 cpu->usage = le64_to_cpu(disk->usage);
2519 cpu->devid = le64_to_cpu(disk->devid);
2520 cpu->pstart = le64_to_cpu(disk->pstart);
2521 cpu->pend = le64_to_cpu(disk->pend);
2522 cpu->vstart = le64_to_cpu(disk->vstart);
2523 cpu->vend = le64_to_cpu(disk->vend);
2524 cpu->target = le64_to_cpu(disk->target);
2525 cpu->flags = le64_to_cpu(disk->flags);
2526}
2527
2528static inline void
2529btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2530 struct btrfs_balance_args *cpu)
2531{
2532 memset(disk, 0, sizeof(*disk));
2533
2534 disk->profiles = cpu_to_le64(cpu->profiles);
2535 disk->usage = cpu_to_le64(cpu->usage);
2536 disk->devid = cpu_to_le64(cpu->devid);
2537 disk->pstart = cpu_to_le64(cpu->pstart);
2538 disk->pend = cpu_to_le64(cpu->pend);
2539 disk->vstart = cpu_to_le64(cpu->vstart);
2540 disk->vend = cpu_to_le64(cpu->vend);
2541 disk->target = cpu_to_le64(cpu->target);
2542 disk->flags = cpu_to_le64(cpu->flags);
2543}
2544
2545/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04002546BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04002547BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002548BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2549 generation, 64);
2550BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002551BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2552 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04002553BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2554 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002555BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2556 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04002557BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2558 chunk_root, 64);
2559BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04002560 chunk_root_level, 8);
2561BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2562 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002563BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2564 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002565BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2566 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04002567BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2568 total_bytes, 64);
2569BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2570 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002571BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2572 sectorsize, 32);
2573BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2574 nodesize, 32);
2575BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2576 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05002577BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2578 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002579BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2580 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002581BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2582 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002583BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2584 compat_flags, 64);
2585BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00002586 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002587BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2588 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002589BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2590 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04002591BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2592 cache_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002593
2594static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2595{
2596 int t = btrfs_super_csum_type(s);
2597 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2598 return btrfs_csum_sizes[t];
2599}
Chris Mason5f39d392007-10-15 16:14:19 -04002600
2601static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04002602{
Chris Mason5f39d392007-10-15 16:14:19 -04002603 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04002604}
2605
Chris Mason5f39d392007-10-15 16:14:19 -04002606/* struct btrfs_file_extent_item */
2607BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04002608
Chris Masond3977122009-01-05 21:25:51 -05002609static inline unsigned long
2610btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454df2007-04-19 13:37:44 -04002611{
Chris Mason5f39d392007-10-15 16:14:19 -04002612 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04002613 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04002614 return offset;
Chris Mason236454df2007-04-19 13:37:44 -04002615}
2616
2617static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2618{
Chris Masondb945352007-10-15 16:15:53 -04002619 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454df2007-04-19 13:37:44 -04002620}
2621
Chris Masondb945352007-10-15 16:15:53 -04002622BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2623 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002624BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2625 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002626BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2627 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002628BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2629 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04002630BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2631 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04002632BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2633 ram_bytes, 64);
2634BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2635 compression, 8);
2636BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2637 encryption, 8);
2638BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2639 other_encoding, 16);
2640
2641/* this returns the number of file bytes represented by the inline item.
2642 * If an item is compressed, this is the uncompressed size
2643 */
2644static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2645 struct btrfs_file_extent_item *e)
2646{
2647 return btrfs_file_extent_ram_bytes(eb, e);
2648}
2649
2650/*
2651 * this returns the number of bytes used by the item on disk, minus the
2652 * size of any extent headers. If a file is compressed on disk, this is
2653 * the compressed size
2654 */
2655static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2656 struct btrfs_item *e)
2657{
2658 unsigned long offset;
2659 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2660 return btrfs_item_size(eb, e) - offset;
2661}
Chris Mason9f5fae22007-03-20 14:38:32 -04002662
Stefan Behrens733f4fb2012-05-25 16:06:10 +02002663/* btrfs_dev_stats_item */
2664static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2665 struct btrfs_dev_stats_item *ptr,
2666 int index)
2667{
2668 u64 val;
2669
2670 read_extent_buffer(eb, &val,
2671 offsetof(struct btrfs_dev_stats_item, values) +
2672 ((unsigned long)ptr) + (index * sizeof(u64)),
2673 sizeof(val));
2674 return val;
2675}
2676
2677static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2678 struct btrfs_dev_stats_item *ptr,
2679 int index, u64 val)
2680{
2681 write_extent_buffer(eb, &val,
2682 offsetof(struct btrfs_dev_stats_item, values) +
2683 ((unsigned long)ptr) + (index * sizeof(u64)),
2684 sizeof(val));
2685}
2686
Arne Jansen630dc772011-09-13 11:06:07 +02002687/* btrfs_qgroup_status_item */
2688BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2689 generation, 64);
2690BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2691 version, 64);
2692BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2693 flags, 64);
2694BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2695 scan, 64);
2696
2697/* btrfs_qgroup_info_item */
2698BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2699 generation, 64);
2700BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2701BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2702 rfer_cmpr, 64);
2703BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2704BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2705 excl_cmpr, 64);
2706
2707BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2708 struct btrfs_qgroup_info_item, generation, 64);
2709BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2710 rfer, 64);
2711BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2712 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2713BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2714 excl, 64);
2715BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2716 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2717
2718/* btrfs_qgroup_limit_item */
2719BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2720 flags, 64);
2721BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2722 max_rfer, 64);
2723BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2724 max_excl, 64);
2725BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2726 rsv_rfer, 64);
2727BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2728 rsv_excl, 64);
2729
Al Viro815745c2011-11-17 15:40:49 -05002730static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
Chris Masone20d96d2007-03-22 12:13:20 -04002731{
2732 return sb->s_fs_info;
2733}
2734
Chris Masond3977122009-01-05 21:25:51 -05002735static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2736{
Chris Masondb945352007-10-15 16:15:53 -04002737 if (level == 0)
2738 return root->leafsize;
2739 return root->nodesize;
2740}
2741
Chris Mason4beb1b82007-03-14 10:31:29 -04002742/* helper function to cast into the data area of the leaf. */
2743#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04002744 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04002745 btrfs_item_offset_nr(leaf, slot)))
2746
2747#define btrfs_item_ptr_offset(leaf, slot) \
2748 ((unsigned long)(btrfs_leaf_data(leaf) + \
2749 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04002750
Chris Mason2b1f55b2008-09-24 11:48:04 -04002751static inline struct dentry *fdentry(struct file *file)
2752{
Chris Mason6da6aba2007-12-18 16:15:09 -05002753 return file->f_path.dentry;
Chris Mason6da6aba2007-12-18 16:15:09 -05002754}
2755
Josef Bacik67377732010-09-16 16:19:09 -04002756static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2757{
2758 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2759 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2760}
2761
Josef Bacik3b16a4e2011-09-21 15:05:58 -04002762static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2763{
2764 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2765}
2766
Chris Masonb18c6682007-04-17 13:26:50 -04002767/* extent-tree.c */
Miao Xie16cdcec2011-04-22 18:12:22 +08002768static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
Josef Bacik9e0baf62011-07-15 15:16:44 +00002769 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08002770{
2771 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2772 3 * num_items;
2773}
2774
Josef Bacik07127182011-08-19 10:29:59 -04002775/*
2776 * Doing a truncate won't result in new nodes or leaves, just what we need for
2777 * COW.
2778 */
2779static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2780 unsigned num_items)
2781{
2782 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2783 num_items;
2784}
2785
Chris Masonfa9c0d792009-04-03 09:47:43 -04002786void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04002787int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2788 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04002789int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002790int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root, u64 bytenr,
2792 u64 num_bytes, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04002793int btrfs_pin_extent(struct btrfs_root *root,
2794 u64 bytenr, u64 num, int reserved);
Chris Masone688b7252011-10-31 20:52:39 -04002795int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2796 struct btrfs_root *root,
2797 u64 bytenr, u64 num_bytes);
Yan Zheng80ff3852008-10-30 14:20:02 -04002798int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002799 struct btrfs_root *root,
2800 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05002801struct btrfs_block_group_cache *btrfs_lookup_block_group(
2802 struct btrfs_fs_info *info,
2803 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002804void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002805u64 btrfs_find_block_group(struct btrfs_root *root,
2806 u64 search_start, u64 search_hint, int owner);
Chris Mason5f39d392007-10-15 16:14:19 -04002807struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002808 struct btrfs_root *root, u32 blocksize,
2809 u64 parent, u64 root_objectid,
2810 struct btrfs_disk_key *key, int level,
Jan Schmidt5581a512012-05-16 17:04:52 +02002811 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002812void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 struct extent_buffer *buf,
Jan Schmidt5581a512012-05-16 17:04:52 +02002815 u64 parent, int last_ref);
Chris Mason65b51a02008-08-01 15:11:20 -04002816struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2817 struct btrfs_root *root,
Chris Mason4008c042009-02-12 14:09:45 -05002818 u64 bytenr, u32 blocksize,
2819 int level);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002820int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2821 struct btrfs_root *root,
2822 u64 root_objectid, u64 owner,
2823 u64 offset, struct btrfs_key *ins);
2824int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *root,
2826 u64 root_objectid, u64 owner, u64 offset,
2827 struct btrfs_key *ins);
Chris Masone6dcd2d2008-07-17 12:53:50 -04002828int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2829 struct btrfs_root *root,
2830 u64 num_bytes, u64 min_alloc_size,
2831 u64 empty_size, u64 hint_byte,
Josef Bacik81c9ad22012-01-18 10:56:06 -05002832 struct btrfs_key *ins, u64 data);
Chris Masone089f052007-03-16 16:20:31 -04002833int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002834 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002835int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002836 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002837int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root,
2839 u64 bytenr, u64 num_bytes, u64 flags,
2840 int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002841int btrfs_free_extent(struct btrfs_trans_handle *trans,
2842 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002843 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2844 u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002845
Chris Mason65b51a02008-08-01 15:11:20 -04002846int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Chris Masone688b7252011-10-31 20:52:39 -04002847int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2848 u64 start, u64 len);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002849void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2850 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04002851int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04002852 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04002853int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04002854 struct btrfs_root *root,
2855 u64 bytenr, u64 num_bytes, u64 parent,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002856 u64 root_objectid, u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002857
Chris Mason9078a3e2007-04-26 16:46:15 -04002858int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2859 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002860int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002861int btrfs_free_block_groups(struct btrfs_fs_info *info);
2862int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04002863int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002864int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04002866 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04002867 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04002868int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *root, u64 group_start);
Josef Bacikea658ba2012-09-11 16:57:25 -04002870void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root);
Yan Zheng2b820322008-11-17 21:11:30 -05002872u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
Miao Xie6d07bce2011-01-05 10:07:31 +00002873u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Chris Mason4184ea72009-03-10 12:39:20 -04002874void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002875int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2876void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002877void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002879int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2880 struct inode *inode);
2881void btrfs_orphan_release_metadata(struct inode *inode);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002882int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2883 struct btrfs_pending_snapshot *pending);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002884int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2885void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2886int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2887void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Miao Xie66d8f3d2012-09-06 04:02:28 -06002888void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2889struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2890 unsigned short type);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002891void btrfs_free_block_rsv(struct btrfs_root *root,
2892 struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04002893int btrfs_block_rsv_add(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002894 struct btrfs_block_rsv *block_rsv,
Josef Bacik8bb8ab22010-10-15 16:52:49 -04002895 u64 num_bytes);
Josef Bacikc06a0e12011-11-04 19:56:02 -04002896int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2897 struct btrfs_block_rsv *block_rsv,
2898 u64 num_bytes);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04002899int btrfs_block_rsv_check(struct btrfs_root *root,
Josef Bacik36ba0222011-10-18 12:15:48 -04002900 struct btrfs_block_rsv *block_rsv, int min_factor);
2901int btrfs_block_rsv_refill(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002902 struct btrfs_block_rsv *block_rsv,
Josef Bacik36ba0222011-10-18 12:15:48 -04002903 u64 min_reserved);
Miao Xieaa38a712011-11-18 17:43:00 +08002904int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2905 struct btrfs_block_rsv *block_rsv,
2906 u64 min_reserved);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002907int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2908 struct btrfs_block_rsv *dst_rsv,
2909 u64 num_bytes);
2910void btrfs_block_rsv_release(struct btrfs_root *root,
2911 struct btrfs_block_rsv *block_rsv,
2912 u64 num_bytes);
2913int btrfs_set_block_group_ro(struct btrfs_root *root,
2914 struct btrfs_block_group_cache *cache);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002915void btrfs_set_block_group_rw(struct btrfs_root *root,
2916 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04002917void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00002918u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08002919int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2920 u64 start, u64 end);
2921int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
Li Dongyang5378e602011-03-24 10:24:27 +00002922 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05002923int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2924 struct btrfs_root *root, u64 type);
Li Dongyangf7039b12011-03-24 10:24:28 +00002925int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08002926
liuboc59021f2011-03-07 02:13:14 +00002927int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02002928int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2929 struct btrfs_fs_info *fs_info);
Chris Masondee26a92007-03-26 16:00:06 -04002930/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002931int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2932 int level, int *slot);
2933int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002934int btrfs_previous_item(struct btrfs_root *root,
2935 struct btrfs_path *path, u64 min_objectid,
2936 int type);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002937void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2938 struct btrfs_root *root, struct btrfs_path *path,
2939 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002940struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2941struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002942int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002943 struct btrfs_key *key, int lowest_level,
2944 int cache_only, u64 min_trans);
2945int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Chris Masone02119d2008-09-05 16:13:11 -04002946 struct btrfs_key *max_key,
Chris Mason3f157a22008-06-25 16:01:31 -04002947 struct btrfs_path *path, int cache_only,
2948 u64 min_trans);
Alexander Block70698302012-06-05 21:07:48 +02002949enum btrfs_compare_tree_result {
2950 BTRFS_COMPARE_TREE_NEW,
2951 BTRFS_COMPARE_TREE_DELETED,
2952 BTRFS_COMPARE_TREE_CHANGED,
2953};
2954typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2955 struct btrfs_root *right_root,
2956 struct btrfs_path *left_path,
2957 struct btrfs_path *right_path,
2958 struct btrfs_key *key,
2959 enum btrfs_compare_tree_result result,
2960 void *ctx);
2961int btrfs_compare_trees(struct btrfs_root *left_root,
2962 struct btrfs_root *right_root,
2963 btrfs_changed_cb_t cb, void *ctx);
Chris Mason5f39d392007-10-15 16:14:19 -04002964int btrfs_cow_block(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root, struct extent_buffer *buf,
2966 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002967 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002968int btrfs_copy_root(struct btrfs_trans_handle *trans,
2969 struct btrfs_root *root,
2970 struct extent_buffer *buf,
2971 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002972int btrfs_block_can_be_shared(struct btrfs_root *root,
2973 struct extent_buffer *buf);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002974void btrfs_extend_item(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *root, struct btrfs_path *path,
2976 u32 data_size);
2977void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root,
2979 struct btrfs_path *path,
2980 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002981int btrfs_split_item(struct btrfs_trans_handle *trans,
2982 struct btrfs_root *root,
2983 struct btrfs_path *path,
2984 struct btrfs_key *new_key,
2985 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002986int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2987 struct btrfs_root *root,
2988 struct btrfs_path *path,
2989 struct btrfs_key *new_key);
Chris Masone089f052007-03-16 16:20:31 -04002990int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2991 *root, struct btrfs_key *key, struct btrfs_path *p, int
2992 ins_len, int cow);
Jan Schmidt5d9e75c42012-05-16 18:25:47 +02002993int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2994 struct btrfs_path *p, u64 time_seq);
Arne Jansen2f38b3e2011-09-13 11:18:10 +02002995int btrfs_search_slot_for_read(struct btrfs_root *root,
2996 struct btrfs_key *key, struct btrfs_path *p,
2997 int find_higher, int return_any);
Chris Mason6702ed42007-08-07 16:15:09 -04002998int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002999 struct btrfs_root *root, struct extent_buffer *parent,
Chris Masona6b6e752007-10-15 16:22:39 -04003000 int start_slot, int cache_only, u64 *last_ret,
3001 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02003002void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04003003struct btrfs_path *btrfs_alloc_path(void);
3004void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003005void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08003006void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04003007 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003008void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3009
Chris Mason85e21ba2008-01-29 15:11:36 -05003010int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3011 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05003012static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3013 struct btrfs_root *root,
3014 struct btrfs_path *path)
3015{
3016 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3017}
3018
Jeff Mahoney143bede2012-03-01 14:56:26 +01003019void setup_items_for_insert(struct btrfs_trans_handle *trans,
3020 struct btrfs_root *root, struct btrfs_path *path,
3021 struct btrfs_key *cpu_key, u32 *data_size,
3022 u32 total_data, u32 total_size, int nr);
Chris Masone089f052007-03-16 16:20:31 -04003023int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3024 *root, struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05003025int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct btrfs_path *path,
3028 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3029
3030static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3031 struct btrfs_root *root,
3032 struct btrfs_path *path,
3033 struct btrfs_key *key,
3034 u32 data_size)
3035{
3036 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3037}
3038
Chris Mason234b63a2007-03-13 10:46:10 -04003039int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidt3d7806e2012-06-11 08:29:29 +02003040int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3041 u64 time_seq);
Alexander Block1c8f52a2012-06-19 07:42:25 -06003042static inline int btrfs_next_old_item(struct btrfs_root *root,
3043 struct btrfs_path *p, u64 time_seq)
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003044{
3045 ++p->slots[0];
3046 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
Alexander Block1c8f52a2012-06-19 07:42:25 -06003047 return btrfs_next_old_leaf(root, p, time_seq);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003048 return 0;
3049}
Alexander Block1c8f52a2012-06-19 07:42:25 -06003050static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3051{
3052 return btrfs_next_old_item(root, p, 0);
3053}
Chris Mason7bb86312007-12-11 09:25:06 -05003054int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason5f39d392007-10-15 16:14:19 -04003055int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04003056int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3057 struct btrfs_block_rsv *block_rsv,
3058 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04003059int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3060 struct btrfs_root *root,
3061 struct extent_buffer *node,
3062 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02003063static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3064{
3065 /*
3066 * Get synced with close_ctree()
3067 */
3068 smp_mb();
3069 return fs_info->closing;
3070}
David Sterba6c417612011-04-13 15:41:04 +02003071static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3072{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02003073 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02003074 kfree(fs_info->delayed_root);
3075 kfree(fs_info->extent_root);
3076 kfree(fs_info->tree_root);
3077 kfree(fs_info->chunk_root);
3078 kfree(fs_info->dev_root);
3079 kfree(fs_info->csum_root);
Arne Jansenbcef60f2011-09-13 15:23:30 +02003080 kfree(fs_info->quota_root);
David Sterba6c417612011-04-13 15:41:04 +02003081 kfree(fs_info->super_copy);
3082 kfree(fs_info->super_for_commit);
3083 kfree(fs_info);
3084}
David Sterba7841cb22011-05-31 18:07:27 +02003085
Jan Schmidt097b8a72012-06-21 11:08:04 +02003086/* tree mod log functions from ctree.c */
3087u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3088 struct seq_list *elem);
3089void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3090 struct seq_list *elem);
3091static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3092{
3093 return atomic_inc_return(&fs_info->tree_mod_seq);
3094}
3095
Chris Masondee26a92007-03-26 16:00:06 -04003096/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05003097int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003098 struct btrfs_path *path,
3099 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05003100int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003102 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3103 const char *name, int name_len);
3104int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *tree_root,
3106 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05003107 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04003108int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3109 struct btrfs_key *key);
3110int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3111 *root, struct btrfs_key *key, struct btrfs_root_item
3112 *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04003113int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 struct btrfs_key *key,
3116 struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003117void btrfs_read_root_item(struct btrfs_root *root,
3118 struct extent_buffer *eb, int slot,
3119 struct btrfs_root_item *item);
Chris Masone089f052007-03-16 16:20:31 -04003120int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3121 btrfs_root_item *item, struct btrfs_key *key);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003122int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
Yan, Zheng76dda932009-09-21 16:00:26 -04003123int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00003124void btrfs_set_root_node(struct btrfs_root_item *item,
3125 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00003126void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003127void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root);
Li Zefan08fe4db2011-03-28 02:01:25 +00003129
Chris Masondee26a92007-03-26 16:00:06 -04003130/* dir-item.c */
Chris Masond3977122009-01-05 21:25:51 -05003131int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root, const char *name,
Miao Xie16cdcec2011-04-22 18:12:22 +08003133 int name_len, struct inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04003134 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04003135struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3136 struct btrfs_root *root,
3137 struct btrfs_path *path, u64 dir,
3138 const char *name, int name_len,
3139 int mod);
3140struct btrfs_dir_item *
3141btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3142 struct btrfs_root *root,
3143 struct btrfs_path *path, u64 dir,
3144 u64 objectid, const char *name, int name_len,
3145 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003146struct btrfs_dir_item *
3147btrfs_search_dir_index_item(struct btrfs_root *root,
3148 struct btrfs_path *path, u64 dirid,
3149 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003150struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3151 struct btrfs_path *path,
Chris Mason7f5c1512007-03-23 15:56:19 -04003152 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003153int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3154 struct btrfs_root *root,
3155 struct btrfs_path *path,
3156 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05003157int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003158 struct btrfs_root *root,
3159 struct btrfs_path *path, u64 objectid,
3160 const char *name, u16 name_len,
3161 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05003162struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_path *path, u64 dir,
3165 const char *name, u16 name_len,
3166 int mod);
Josef Bacik22a94d42011-03-16 16:47:17 -04003167int verify_dir_item(struct btrfs_root *root,
3168 struct extent_buffer *leaf,
3169 struct btrfs_dir_item *dir_item);
Josef Bacik7b128762008-07-24 12:17:14 -04003170
3171/* orphan.c */
3172int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3173 struct btrfs_root *root, u64 offset);
3174int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3175 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003176int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04003177
Chris Masondee26a92007-03-26 16:00:06 -04003178/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05003179int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3180 struct btrfs_root *root,
3181 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003182 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05003183int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3184 struct btrfs_root *root,
3185 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003186 u64 inode_objectid, u64 ref_objectid, u64 *index);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003187struct btrfs_inode_ref *
3188btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
3189 struct btrfs_root *root,
3190 struct btrfs_path *path,
3191 const char *name, int name_len,
3192 u64 inode_objectid, u64 ref_objectid, int mod);
Chris Mason5f39d392007-10-15 16:14:19 -04003193int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3194 struct btrfs_root *root,
3195 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04003196int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04003197 *root, struct btrfs_path *path,
3198 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04003199
3200/* file-item.c */
Chris Mason459931e2008-12-10 09:10:46 -05003201int btrfs_del_csums(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04003203int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003204 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04003205int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
Josef Bacikc3298612012-08-03 16:49:19 -04003206 struct bio *bio, u64 logical_offset);
Chris Masonb18c6682007-04-17 13:26:50 -04003207int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04003208 struct btrfs_root *root,
3209 u64 objectid, u64 pos,
3210 u64 disk_offset, u64 disk_num_bytes,
3211 u64 num_bytes, u64 offset, u64 ram_bytes,
3212 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04003213int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3214 struct btrfs_root *root,
3215 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04003216 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05003217int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05003218 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04003219 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04003220int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003221 struct bio *bio, u64 file_start, int contig);
Chris Masonb18c6682007-04-17 13:26:50 -04003222struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3223 struct btrfs_root *root,
3224 struct btrfs_path *path,
Chris Masond20f7042008-12-08 16:58:54 -05003225 u64 bytenr, int cow);
Chris Mason1de037a2007-05-29 15:17:08 -04003226int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root, struct btrfs_path *path,
3228 u64 isize);
Arne Jansena2de7332011-03-08 14:14:00 +01003229int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3230 struct list_head *list, int search_commit);
Chris Mason39279cc2007-06-12 06:35:45 -04003231/* inode.c */
Josef Bacikb2675152011-07-18 13:21:36 -04003232struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3233 size_t pg_offset, u64 start, u64 len,
3234 int create);
Chris Mason4881ee52008-07-24 09:51:08 -04003235
3236/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04003237#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04003238#define ClearPageChecked ClearPageFsMisc
3239#define SetPageChecked SetPageFsMisc
3240#define PageChecked PageFsMisc
3241#endif
3242
Li Zefanb6973aa2011-07-20 03:46:35 +00003243/* This forces readahead on a given range of bytes in an inode */
3244static inline void btrfs_force_ra(struct address_space *mapping,
3245 struct file_ra_state *ra, struct file *file,
3246 pgoff_t offset, unsigned long req_size)
3247{
3248 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3249}
3250
Chris Mason3de45862008-11-17 21:02:50 -05003251struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3252int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04003253int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3254 struct btrfs_root *root,
3255 struct inode *dir, struct inode *inode,
3256 const char *name, int name_len);
3257int btrfs_add_link(struct btrfs_trans_handle *trans,
3258 struct inode *parent_inode, struct inode *inode,
3259 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003260int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3261 struct btrfs_root *root,
3262 struct inode *dir, u64 objectid,
3263 const char *name, int name_len);
Josef Bacik2aaa6652012-08-29 14:27:18 -04003264int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3265 int front);
Chris Masone02119d2008-09-05 16:13:11 -04003266int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root,
3268 struct inode *inode, u64 new_size,
3269 u32 min_type);
3270
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003271int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Josef Bacik2ac55d42010-02-03 19:33:23 +00003272int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3273 struct extent_state **cached_state);
Chris Masonf4219502008-07-22 11:18:09 -04003274int btrfs_writepages(struct address_space *mapping,
3275 struct writeback_control *wbc);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003276int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Josef Bacikd82a6f12011-05-11 15:26:06 -04003277 struct btrfs_root *new_root, u64 new_dirid);
Chris Mason239b14b2008-03-24 15:02:07 -04003278int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -04003279 size_t size, struct bio *bio, unsigned long bio_flags);
Chris Mason239b14b2008-03-24 15:02:07 -04003280
Nick Pigginc2ec1752009-03-31 15:23:21 -07003281int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04003282int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04003283void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01003284int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Josef Bacik22c44fe2011-11-30 10:45:38 -05003285int btrfs_dirty_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003286struct inode *btrfs_alloc_inode(struct super_block *sb);
3287void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04003288int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003289int btrfs_init_cachep(void);
3290void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04003291long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05303292struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00003293 struct btrfs_root *root, int *was_new);
Chris Masona52d9a82007-08-27 16:49:44 -04003294struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +02003295 size_t pg_offset, u64 start, u64 end,
Chris Masona52d9a82007-08-27 16:49:44 -04003296 int create);
3297int btrfs_update_inode(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root,
3299 struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04003300int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3301int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05003302int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003303void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3304 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05003305int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003306void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003307void btrfs_add_delayed_iput(struct inode *inode);
3308void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04003309int btrfs_prealloc_file_range(struct inode *inode, int mode,
3310 u64 start, u64 num_bytes, u64 min_size,
3311 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04003312int btrfs_prealloc_file_range_trans(struct inode *inode,
3313 struct btrfs_trans_handle *trans, int mode,
3314 u64 start, u64 num_bytes, u64 min_size,
3315 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04003316extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04003317
3318/* ioctl.c */
3319long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02003320void btrfs_update_iflags(struct inode *inode);
3321void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Chris Mason4cb53002011-05-24 15:35:30 -04003322int btrfs_defrag_file(struct inode *inode, struct file *file,
3323 struct btrfs_ioctl_defrag_range_args *range,
3324 u64 newer_than, unsigned long max_pages);
Chris Mason39279cc2007-06-12 06:35:45 -04003325/* file.c */
Chris Mason4cb53002011-05-24 15:35:30 -04003326int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3327 struct inode *inode);
3328int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04003329int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Josef Bacik7014cdb2012-08-30 20:06:49 -04003330void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3331 int skip_pinned);
Josef Bacik5dc562c2012-08-17 13:14:17 -04003332int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3333 u64 start, u64 end, int skip_pinned,
3334 int modified);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07003335extern const struct file_operations btrfs_file_operations;
Josef Bacik5dc562c2012-08-17 13:14:17 -04003336int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3337 struct btrfs_root *root, struct inode *inode,
3338 struct btrfs_path *path, u64 start, u64 end,
Josef Bacik2aaa6652012-08-29 14:27:18 -04003339 u64 *drop_end, int drop_cache);
Josef Bacik5dc562c2012-08-17 13:14:17 -04003340int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3341 struct btrfs_root *root, struct inode *inode, u64 start,
Josef Bacik26714852012-08-29 12:24:27 -04003342 u64 end, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04003343int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04003344 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04003345int btrfs_release_file(struct inode *inode, struct file *file);
Josef Bacikbe1a12a2011-04-06 13:05:22 -04003346void btrfs_drop_pages(struct page **pages, size_t num_pages);
3347int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3348 struct page **pages, size_t num_pages,
3349 loff_t pos, size_t write_bytes,
3350 struct extent_state **cached);
Sage Weil6bf13c02008-06-10 10:07:39 -04003351
Chris Mason6702ed42007-08-07 16:15:09 -04003352/* tree-defrag.c */
3353int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3354 struct btrfs_root *root, int cache_only);
Josef Bacik58176a92007-08-29 15:47:34 -04003355
3356/* sysfs.c */
3357int btrfs_init_sysfs(void);
3358void btrfs_exit_sysfs(void);
Josef Bacik58176a92007-08-29 15:47:34 -04003359
Josef Bacik5103e942007-11-16 11:45:54 -05003360/* xattr.c */
3361ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04003362
Chris Masonedbd8d42007-12-21 16:27:24 -05003363/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04003364int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04003365int btrfs_sync_fs(struct super_block *sb, int wait);
Joe Perches533574c2012-07-30 14:40:13 -07003366
3367#ifdef CONFIG_PRINTK
3368__printf(2, 3)
Jeff Mahoney4da35112012-03-01 14:57:30 +01003369void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
Joe Perches533574c2012-07-30 14:40:13 -07003370#else
3371static inline __printf(2, 3)
3372void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3373{
3374}
3375#endif
3376
3377__printf(5, 6)
liuboacce9522011-01-06 19:30:25 +08003378void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01003379 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08003380
Joe Perches533574c2012-07-30 14:40:13 -07003381
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003382void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3383 struct btrfs_root *root, const char *function,
3384 unsigned int line, int errno);
3385
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06003386#define btrfs_set_fs_incompat(__fs_info, opt) \
3387 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3388
3389static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3390 u64 flag)
3391{
3392 struct btrfs_super_block *disk_super;
3393 u64 features;
3394
3395 disk_super = fs_info->super_copy;
3396 features = btrfs_super_incompat_flags(disk_super);
3397 if (!(features & flag)) {
3398 features |= flag;
3399 btrfs_set_super_incompat_flags(disk_super, features);
3400 }
3401}
3402
David Sterba005d6422012-09-18 07:52:32 -06003403/*
3404 * Call btrfs_abort_transaction as early as possible when an error condition is
3405 * detected, that way the exact line number is reported.
3406 */
3407
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003408#define btrfs_abort_transaction(trans, root, errno) \
3409do { \
3410 __btrfs_abort_transaction(trans, root, __func__, \
3411 __LINE__, errno); \
3412} while (0)
liuboacce9522011-01-06 19:30:25 +08003413
3414#define btrfs_std_error(fs_info, errno) \
3415do { \
3416 if ((errno)) \
Jeff Mahoney4da35112012-03-01 14:57:30 +01003417 __btrfs_std_error((fs_info), __func__, \
3418 __LINE__, (errno), NULL); \
3419} while (0)
3420
3421#define btrfs_error(fs_info, errno, fmt, args...) \
3422do { \
3423 __btrfs_std_error((fs_info), __func__, __LINE__, \
3424 (errno), fmt, ##args); \
liuboacce9522011-01-06 19:30:25 +08003425} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04003426
Joe Perches533574c2012-07-30 14:40:13 -07003427__printf(5, 6)
Jeff Mahoney8c342932011-10-03 23:22:31 -04003428void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3429 unsigned int line, int errno, const char *fmt, ...);
3430
3431#define btrfs_panic(fs_info, errno, fmt, args...) \
3432do { \
3433 struct btrfs_fs_info *_i = (fs_info); \
3434 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3435 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
Chris Masoneb60cea2007-02-02 09:18:22 -05003436} while (0)
3437
3438/* acl.c */
3439#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02003440struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Chris Masoneb60cea2007-02-02 09:18:22 -05003441int btrfs_init_acl(struct btrfs_trans_handle *trans,
3442 struct inode *inode, struct inode *dir);
3443int btrfs_acl_chmod(struct inode *inode);
Li Zefan9b89d952011-07-14 03:17:39 +00003444#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10003445#define btrfs_get_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00003446static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3447 struct inode *inode, struct inode *dir)
3448{
3449 return 0;
3450}
3451static inline int btrfs_acl_chmod(struct inode *inode)
3452{
3453 return 0;
3454}
3455#endif
Chris Masoneb60cea2007-02-02 09:18:22 -05003456
3457/* relocation.c */
3458int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3459int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3460 struct btrfs_root *root);
3461int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3462 struct btrfs_root *root);
3463int btrfs_recover_relocation(struct btrfs_root *root);
3464int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3465void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3466 struct btrfs_root *root, struct extent_buffer *buf,
3467 struct extent_buffer *cow);
3468void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3469 struct btrfs_pending_snapshot *pending,
3470 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003471int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Chris Masoneb60cea2007-02-02 09:18:22 -05003472 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01003473
3474/* scrub.c */
3475int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
Arne Jansen86287642011-03-23 16:34:19 +01003476 struct btrfs_scrub_progress *progress, int readonly);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003477void btrfs_scrub_pause(struct btrfs_root *root);
3478void btrfs_scrub_pause_super(struct btrfs_root *root);
3479void btrfs_scrub_continue(struct btrfs_root *root);
3480void btrfs_scrub_continue_super(struct btrfs_root *root);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003481int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
Arne Jansena2de7332011-03-08 14:14:00 +01003482int btrfs_scrub_cancel(struct btrfs_root *root);
3483int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3484int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3485int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3486 struct btrfs_scrub_progress *progress);
3487
Arne Jansen7414a032011-05-23 14:33:49 +02003488/* reada.c */
3489struct reada_control {
3490 struct btrfs_root *root; /* tree to prefetch */
3491 struct btrfs_key key_start;
3492 struct btrfs_key key_end; /* exclusive */
3493 atomic_t elems;
3494 struct kref refcnt;
3495 wait_queue_head_t wait;
3496};
3497struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3498 struct btrfs_key *start, struct btrfs_key *end);
3499int btrfs_reada_wait(void *handle);
3500void btrfs_reada_detach(void *handle);
3501int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3502 u64 start, int err);
3503
Arne Jansenbed92ea2012-06-28 18:03:02 +02003504/* qgroup.c */
3505struct qgroup_update {
Jan Schmidt64947ec2012-05-16 16:57:09 +02003506 struct list_head list;
Arne Jansenbed92ea2012-06-28 18:03:02 +02003507 struct btrfs_delayed_ref_node *node;
3508 struct btrfs_delayed_extent_op *extent_op;
Jan Schmidt64947ec2012-05-16 16:57:09 +02003509};
3510
Arne Jansenbed92ea2012-06-28 18:03:02 +02003511int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3512 struct btrfs_fs_info *fs_info);
3513int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3514 struct btrfs_fs_info *fs_info);
3515int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3516int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3517 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3518int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3519 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3520int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3521 struct btrfs_fs_info *fs_info, u64 qgroupid,
3522 char *name);
3523int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3524 struct btrfs_fs_info *fs_info, u64 qgroupid);
3525int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3526 struct btrfs_fs_info *fs_info, u64 qgroupid,
3527 struct btrfs_qgroup_limit *limit);
3528int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3529void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3530struct btrfs_delayed_extent_op;
3531int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3532 struct btrfs_delayed_ref_node *node,
3533 struct btrfs_delayed_extent_op *extent_op);
3534int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3535 struct btrfs_fs_info *fs_info,
3536 struct btrfs_delayed_ref_node *node,
3537 struct btrfs_delayed_extent_op *extent_op);
3538int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3539 struct btrfs_fs_info *fs_info);
3540int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3541 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3542 struct btrfs_qgroup_inherit *inherit);
3543int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3544void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3545
3546void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
Jan Schmidtbd989ba2012-05-16 17:18:50 +02003547
Jan Schmidt95a06072012-05-29 17:06:54 +02003548static inline int is_fstree(u64 rootid)
3549{
3550 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3551 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
3552 return 1;
3553 return 0;
3554}
Chris Masoneb60cea2007-02-02 09:18:22 -05003555#endif