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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>
Stefan Behrens803b2f52013-08-15 17:11:21 +020026#include <linux/semaphore.h>
Josef Bacik58176a92007-08-29 15:47:34 -040027#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040028#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040029#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Stefan Schmidtf8b18082011-01-12 10:30:42 +010031#include <linux/kobject.h>
liubo1abe9b82011-03-24 11:18:59 +000032#include <trace/events/btrfs.h>
Chris Mason479965d2007-10-15 16:14:27 -040033#include <asm/kmap_types.h>
Josef Bacik3b16a4e2011-09-21 15:05:58 -040034#include <linux/pagemap.h>
Filipe Brandenburger55e301f2013-01-29 06:04:50 +000035#include <linux/btrfs.h>
Chris Masond1310b22008-01-24 16:13:08 -050036#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040037#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040038#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040039
Chris Masone089f052007-03-16 16:20:31 -040040struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040041struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040042struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040043extern struct kmem_cache *btrfs_trans_handle_cachep;
44extern struct kmem_cache *btrfs_transaction_cachep;
45extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040046extern struct kmem_cache *btrfs_path_cachep;
Josef Bacikdc89e982011-01-28 17:05:48 -050047extern struct kmem_cache *btrfs_free_space_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040048struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040049
Josef Bacik294e30f2013-10-09 12:00:56 -040050#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
51#define STATIC noinline
52#else
53#define STATIC static noinline
54#endif
55
Zach Browncdb4c572013-02-20 00:55:13 +000056#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
Chris Masoneb60cea2007-02-02 09:18:22 -050057
Stefan Behrens72d7aef2012-11-06 14:57:46 +010058#define BTRFS_MAX_MIRRORS 3
Stefan Behrens94598ba2012-03-27 14:21:26 -040059
Chris Mason4008c042009-02-12 14:09:45 -050060#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040061
Yan Zheng5d4f98a2009-06-10 10:45:14 -040062#define BTRFS_COMPAT_EXTENT_TREE_V0
63
Chris Mason5a3f23d2009-03-31 13:27:11 -040064/*
65 * files bigger than this get some pre-flushing when they are added
66 * to the ordered operations list. That way we limit the total
67 * work done by the commit
68 */
69#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
70
Chris Mason0b86a832008-03-24 15:01:56 -040071/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040072#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040073
74/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040075#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040076
Chris Mason0b86a832008-03-24 15:01:56 -040077/*
78 * chunk tree stores translations from logical -> physical block numbering
79 * the super block points to the chunk tree
80 */
Chris Masone085def2008-03-24 15:02:07 -040081#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040082
83/*
84 * stores information about which areas of a given device are in use.
85 * one per device. The tree of tree roots points to the device tree
86 */
Chris Masone085def2008-03-24 15:02:07 -040087#define BTRFS_DEV_TREE_OBJECTID 4ULL
88
89/* one per subvolume, storing files and directories */
90#define BTRFS_FS_TREE_OBJECTID 5ULL
91
92/* directory objectid inside the root tree */
93#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040094
Chris Masond20f7042008-12-08 16:58:54 -050095/* holds checksums of all the data extents */
96#define BTRFS_CSUM_TREE_OBJECTID 7ULL
97
Arne Jansen630dc772011-09-13 11:06:07 +020098/* holds quota configuration and tracking */
99#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
100
Stefan Behrens07b30a42013-08-15 17:11:17 +0200101/* for storing items that use the BTRFS_UUID_KEY* types */
102#define BTRFS_UUID_TREE_OBJECTID 9ULL
103
David Sterba60b62972013-04-30 17:29:29 +0000104/* for storing balance parameters in the root tree */
105#define BTRFS_BALANCE_OBJECTID -4ULL
106
Josef Bacik7b128762008-07-24 12:17:14 -0400107/* orhpan objectid for tracking unlinked/truncated files */
108#define BTRFS_ORPHAN_OBJECTID -5ULL
109
Chris Masone02119d2008-09-05 16:13:11 -0400110/* does write ahead logging to speed up fsyncs */
111#define BTRFS_TREE_LOG_OBJECTID -6ULL
112#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
113
Zheng Yane4657682008-09-26 10:04:53 -0400114/* for space balancing */
115#define BTRFS_TREE_RELOC_OBJECTID -8ULL
116#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
117
Chris Masond20f7042008-12-08 16:58:54 -0500118/*
119 * extent checksums all have this objectid
120 * this allows them to share the logging tree
121 * for fsyncs
122 */
123#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
124
Josef Bacik0af3d002010-06-21 14:48:16 -0400125/* For storing free space cache */
126#define BTRFS_FREE_SPACE_OBJECTID -11ULL
127
Li Zefan82d59022011-04-20 10:33:24 +0800128/*
Wang Sheng-Hui527a1362012-09-06 13:33:37 +0800129 * The inode number assigned to the special inode for storing
Li Zefan82d59022011-04-20 10:33:24 +0800130 * free ino cache
131 */
132#define BTRFS_FREE_INO_OBJECTID -12ULL
133
Zheng Yan31840ae2008-09-23 13:14:14 -0400134/* dummy objectid represents multiple objectids */
135#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
136
Chris Mason0b86a832008-03-24 15:01:56 -0400137/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400138 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400139 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500140#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400141#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400142#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400143
Chris Mason0b86a832008-03-24 15:01:56 -0400144
145/*
146 * the device items go into the chunk tree. The key is in the form
147 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
148 */
149#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
150
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400151#define BTRFS_BTREE_INODE_OBJECTID 1
152
153#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
154
Geert Uytterhoeven6e71c472013-08-20 13:20:08 +0200155#define BTRFS_DEV_REPLACE_DEVID 0ULL
Stefan Behrense93c89c2012-11-05 17:33:06 +0100156
Chris Masonfec577f2007-02-26 10:40:21 -0500157/*
Chris Mason727011e2010-08-06 13:21:20 -0400158 * the max metadata block size. This limit is somewhat artificial,
159 * but the memmove costs go through the roof for larger blocks.
160 */
161#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
162
163/*
Chris Masone20d96d2007-03-22 12:13:20 -0400164 * we can actually store much bigger names, but lets not confuse the rest
165 * of linux
166 */
167#define BTRFS_NAME_LEN 255
168
Mark Fashehf1863732012-08-08 11:32:27 -0700169/*
170 * Theoretical limit is larger, but we keep this down to a sane
171 * value. That should limit greatly the possibility of collisions on
172 * inode ref items.
173 */
174#define BTRFS_LINK_MAX 65535U
175
Chris Masonf254e522007-03-29 15:15:27 -0400176/* 32 bytes in various csum fields */
177#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500178
179/* csum types */
180#define BTRFS_CSUM_TYPE_CRC32 0
181
182static int btrfs_csum_sizes[] = { 4, 0 };
183
Chris Mason509659c2007-05-10 12:36:17 -0400184/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500185#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400186
Stefan Behrens29a8d9a2012-11-06 14:16:24 +0100187/* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
188#define REQ_GET_READ_MIRRORS (1 << 30)
189
Chris Masonfabb5682007-06-07 22:13:21 -0400190#define BTRFS_FT_UNKNOWN 0
191#define BTRFS_FT_REG_FILE 1
192#define BTRFS_FT_DIR 2
193#define BTRFS_FT_CHRDEV 3
194#define BTRFS_FT_BLKDEV 4
195#define BTRFS_FT_FIFO 5
196#define BTRFS_FT_SOCK 6
197#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500198#define BTRFS_FT_XATTR 8
199#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400200
Stefan Behrens3d136a12012-02-03 11:20:04 +0100201/* ioprio of readahead is set to idle */
202#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
203
Miao Xiee2d84522013-01-29 10:09:20 +0000204#define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
205
Chris Masone20d96d2007-03-22 12:13:20 -0400206/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400207 * The key defines the order in the tree, and so it also defines (optimal)
208 * block layout.
209 *
210 * objectid corresponds to the inode number.
211 *
212 * type tells us things about the object, and is a kind of stream selector.
213 * so for a given inode, keys with type of 1 might refer to the inode data,
214 * type of 2 may point to file data in the btree and type == 3 may point to
215 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500216 *
217 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400218 *
219 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
220 * in cpu native order. Otherwise they are identical and their sizes
221 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500222 */
Chris Masone2fa7222007-03-12 16:22:34 -0400223struct btrfs_disk_key {
224 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400225 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400226 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400227} __attribute__ ((__packed__));
228
229struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500230 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400231 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400232 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500233} __attribute__ ((__packed__));
234
Chris Mason0b86a832008-03-24 15:01:56 -0400235struct btrfs_mapping_tree {
236 struct extent_map_tree map_tree;
237};
238
Chris Mason0b86a832008-03-24 15:01:56 -0400239struct btrfs_dev_item {
240 /* the internal btrfs device id */
241 __le64 devid;
242
243 /* size of the device */
244 __le64 total_bytes;
245
246 /* bytes used */
247 __le64 bytes_used;
248
249 /* optimal io alignment for this device */
250 __le32 io_align;
251
252 /* optimal io width for this device */
253 __le32 io_width;
254
255 /* minimal io size for this device */
256 __le32 sector_size;
257
Chris Mason0b86a832008-03-24 15:01:56 -0400258 /* type and info about this device */
259 __le64 type;
260
Yan Zheng2b820322008-11-17 21:11:30 -0500261 /* expected generation for this device */
262 __le64 generation;
263
Chris Masonc3027eb2008-12-08 16:40:21 -0500264 /*
265 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400266 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500267 */
268 __le64 start_offset;
269
Chris Masone17cade2008-04-15 15:41:47 -0400270 /* grouping information for allocation decisions */
271 __le32 dev_group;
272
273 /* seek speed 0-100 where 100 is fastest */
274 u8 seek_speed;
275
276 /* bandwidth 0-100 where 100 is fastest */
277 u8 bandwidth;
278
Chris Mason0d81ba52008-03-24 15:02:07 -0400279 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400280 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500281
282 /* uuid of FS who owns this device */
283 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400284} __attribute__ ((__packed__));
285
286struct btrfs_stripe {
287 __le64 devid;
288 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400289 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400290} __attribute__ ((__packed__));
291
292struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400293 /* size of this chunk in bytes */
294 __le64 length;
295
296 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400297 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400298
Chris Mason0b86a832008-03-24 15:01:56 -0400299 __le64 stripe_len;
300 __le64 type;
301
302 /* optimal io alignment for this chunk */
303 __le32 io_align;
304
305 /* optimal io width for this chunk */
306 __le32 io_width;
307
308 /* minimal io size for this chunk */
309 __le32 sector_size;
310
311 /* 2^16 stripes is quite a lot, a second limit is the size of a single
312 * item in the btree
313 */
314 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400315
316 /* sub stripes only matter for raid10 */
317 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400318 struct btrfs_stripe stripe;
319 /* additional stripes go here */
320} __attribute__ ((__packed__));
321
Josef Bacik0af3d002010-06-21 14:48:16 -0400322#define BTRFS_FREE_SPACE_EXTENT 1
323#define BTRFS_FREE_SPACE_BITMAP 2
324
325struct btrfs_free_space_entry {
326 __le64 offset;
327 __le64 bytes;
328 u8 type;
329} __attribute__ ((__packed__));
330
331struct btrfs_free_space_header {
332 struct btrfs_disk_key location;
333 __le64 generation;
334 __le64 num_entries;
335 __le64 num_bitmaps;
336} __attribute__ ((__packed__));
337
Chris Mason0b86a832008-03-24 15:01:56 -0400338static inline unsigned long btrfs_chunk_item_size(int num_stripes)
339{
340 BUG_ON(num_stripes == 0);
341 return sizeof(struct btrfs_chunk) +
342 sizeof(struct btrfs_stripe) * (num_stripes - 1);
343}
344
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400345#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
346#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
liuboacce9522011-01-06 19:30:25 +0800347
348/*
349 * File system states
350 */
Miao Xie87533c42013-01-29 10:14:48 +0000351#define BTRFS_FS_STATE_ERROR 0
Miao Xiedc81cdc2013-02-20 23:32:52 -0700352#define BTRFS_FS_STATE_REMOUNTING 1
David Sterba08748812013-03-12 14:46:08 +0000353#define BTRFS_FS_STATE_TRANS_ABORTED 2
liuboacce9522011-01-06 19:30:25 +0800354
Miao Xie87533c42013-01-29 10:14:48 +0000355/* Super block flags */
liuboacce9522011-01-06 19:30:25 +0800356/* Errors detected */
357#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
358
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400359#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
360#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
361
362#define BTRFS_BACKREF_REV_MAX 256
363#define BTRFS_BACKREF_REV_SHIFT 56
364#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
365 BTRFS_BACKREF_REV_SHIFT)
366
367#define BTRFS_OLD_BACKREF_REV 0
368#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400369
Chris Masonfec577f2007-02-26 10:40:21 -0500370/*
371 * every tree block (leaf or node) starts with this header.
372 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400373struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400374 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400375 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400376 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400377 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400378 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400379
380 /* allowed to be different from the super from here on down */
381 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400382 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400383 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400384 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400385 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500386} __attribute__ ((__packed__));
387
Chris Mason5f39d392007-10-15 16:14:19 -0400388#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500389 sizeof(struct btrfs_header)) / \
390 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400391#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400392#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454d2007-04-19 13:37:44 -0400393#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
394 sizeof(struct btrfs_item) - \
395 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000396#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
397 sizeof(struct btrfs_item) -\
398 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500399
Chris Mason0b86a832008-03-24 15:01:56 -0400400
401/*
402 * this is a very generous portion of the super block, giving us
403 * room to translate 14 chunks with 3 stripes each.
404 */
405#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400406#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400407
Chris Masonfec577f2007-02-26 10:40:21 -0500408/*
Chris Masonaf31f5e2011-11-03 15:17:42 -0400409 * just in case we somehow lose the roots and are not able to mount,
410 * we store an array of the roots from previous transactions
411 * in the super.
412 */
413#define BTRFS_NUM_BACKUP_ROOTS 4
414struct btrfs_root_backup {
415 __le64 tree_root;
416 __le64 tree_root_gen;
417
418 __le64 chunk_root;
419 __le64 chunk_root_gen;
420
421 __le64 extent_root;
422 __le64 extent_root_gen;
423
424 __le64 fs_root;
425 __le64 fs_root_gen;
426
427 __le64 dev_root;
428 __le64 dev_root_gen;
429
430 __le64 csum_root;
431 __le64 csum_root_gen;
432
433 __le64 total_bytes;
434 __le64 bytes_used;
435 __le64 num_devices;
436 /* future */
Masanari Iidad1423242012-10-31 15:16:32 +0000437 __le64 unused_64[4];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400438
439 u8 tree_root_level;
440 u8 chunk_root_level;
441 u8 extent_root_level;
442 u8 fs_root_level;
443 u8 dev_root_level;
444 u8 csum_root_level;
445 /* future and to align */
446 u8 unused_8[10];
447} __attribute__ ((__packed__));
448
449/*
Chris Masonfec577f2007-02-26 10:40:21 -0500450 * the super block basically lists the main trees of the FS
451 * it currently lacks any block count etc etc
452 */
Chris Mason234b63a2007-03-13 10:46:10 -0400453struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400454 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400455 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500456 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400457 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400458 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400459
460 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400461 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400462 __le64 generation;
463 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400464 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400465 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500466
467 /* this will help find the new super based on the log root */
468 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400469 __le64 total_bytes;
470 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400471 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400472 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400473 __le32 sectorsize;
474 __le32 nodesize;
475 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500476 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400477 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400478 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500479 __le64 compat_flags;
480 __le64 compat_ro_flags;
481 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500482 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400483 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400484 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400485 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400486 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500487
Chris Mason7ae9c092008-04-18 10:29:49 -0400488 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500489
Josef Bacik0af3d002010-06-21 14:48:16 -0400490 __le64 cache_generation;
Stefan Behrens26432792013-08-15 17:11:22 +0200491 __le64 uuid_tree_generation;
Josef Bacik0af3d002010-06-21 14:48:16 -0400492
Chris Masonc3027eb2008-12-08 16:40:21 -0500493 /* future expansion */
Stefan Behrens26432792013-08-15 17:11:22 +0200494 __le64 reserved[30];
Chris Mason0b86a832008-03-24 15:01:56 -0400495 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400496 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
Chris Masoncfaa7292007-02-21 17:04:57 -0500497} __attribute__ ((__packed__));
498
Chris Masonfec577f2007-02-26 10:40:21 -0500499/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500500 * Compat flags that we support. If any incompat flags are set other than the
501 * ones specified below then we will fail to mount
502 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400503#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
Josef Bacik0af3d002010-06-21 14:48:16 -0400504#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
Josef Bacik67377732010-09-16 16:19:09 -0400505#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
Li Zefana6fa6fa2010-10-25 15:12:26 +0800506#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
Chris Mason727011e2010-08-06 13:21:20 -0400507/*
508 * some patches floated around with a second compression method
509 * lets save that incompat here for when they do get in
510 * Note we don't actually support it, we're just reserving the
511 * number
512 */
513#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
514
515/*
516 * older kernels tried to do bigger metadata blocks, but the
517 * code was pretty buggy. Lets not let them try anymore.
518 */
519#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400520
Mark Fashehf1863732012-08-08 11:32:27 -0700521#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
David Woodhouse53b381b2013-01-29 18:40:14 -0500522#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
Josef Bacik3173a182013-03-07 14:22:04 -0500523#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
Josef Bacik16e75492013-10-22 12:18:51 -0400524#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
Mark Fashehf1863732012-08-08 11:32:27 -0700525
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400526#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500527#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
528#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400529#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500530#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
531#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
532
Josef Bacik0af3d002010-06-21 14:48:16 -0400533#define BTRFS_FEATURE_INCOMPAT_SUPP \
534 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
Josef Bacik67377732010-09-16 16:19:09 -0400535 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800536 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
Chris Mason727011e2010-08-06 13:21:20 -0400537 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
Mark Fashehf1863732012-08-08 11:32:27 -0700538 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
David Woodhouse53b381b2013-01-29 18:40:14 -0500539 BTRFS_FEATURE_INCOMPAT_RAID56 | \
Josef Bacik3173a182013-03-07 14:22:04 -0500540 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
Josef Bacik16e75492013-10-22 12:18:51 -0400541 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
542 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500543
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500544#define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
545 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
546#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
Josef Bacikf2b636e2008-12-02 06:36:08 -0500547
548/*
Chris Mason62e27492007-03-15 12:56:47 -0400549 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500550 * the item in the leaf (relative to the start of the data area)
551 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400552struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400553 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400554 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400555 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500556} __attribute__ ((__packed__));
557
Chris Masonfec577f2007-02-26 10:40:21 -0500558/*
559 * leaves have an item area and a data area:
560 * [item0, item1....itemN] [free space] [dataN...data1, data0]
561 *
562 * The data is separate from the items to get the keys closer together
563 * during searches.
564 */
Chris Mason234b63a2007-03-13 10:46:10 -0400565struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400566 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400567 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500568} __attribute__ ((__packed__));
569
Chris Masonfec577f2007-02-26 10:40:21 -0500570/*
571 * all non-leaf blocks are nodes, they hold only keys and pointers to
572 * other blocks
573 */
Chris Mason123abc82007-03-14 14:14:43 -0400574struct btrfs_key_ptr {
575 struct btrfs_disk_key key;
576 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500577 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400578} __attribute__ ((__packed__));
579
Chris Mason234b63a2007-03-13 10:46:10 -0400580struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400581 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400582 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500583} __attribute__ ((__packed__));
584
Chris Masonfec577f2007-02-26 10:40:21 -0500585/*
Chris Mason234b63a2007-03-13 10:46:10 -0400586 * btrfs_paths remember the path taken from the root down to the leaf.
587 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500588 * to any other levels that are present.
589 *
590 * The slots array records the index of the item or block pointer
591 * used while walking the tree.
592 */
Chris Mason234b63a2007-03-13 10:46:10 -0400593struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400594 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400595 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400596 /* if there is real range locking, this locks field will change */
597 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400598 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400599 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400600 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500601
602 /*
603 * set by btrfs_split_item, tells search_slot to keep all locks
604 * and to force calls to keep space in the nodes
605 */
Chris Masonb9473432009-03-13 11:00:37 -0400606 unsigned int search_for_split:1;
607 unsigned int keep_locks:1;
608 unsigned int skip_locking:1;
609 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400610 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500611};
Chris Mason5de08d72007-02-24 06:24:44 -0500612
Chris Mason62e27492007-03-15 12:56:47 -0400613/*
614 * items in the extent btree are used to record the objectid of the
615 * owner of the block and the number of references
616 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400617
Chris Mason62e27492007-03-15 12:56:47 -0400618struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400619 __le64 refs;
620 __le64 generation;
621 __le64 flags;
622} __attribute__ ((__packed__));
623
624struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400625 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500626} __attribute__ ((__packed__));
627
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400628#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
629 sizeof(struct btrfs_item))
630
631#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
632#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
633
634/* following flags only apply to tree blocks */
635
636/* use full backrefs for extent pointers in the block */
637#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
638
Arne Jansena2de7332011-03-08 14:14:00 +0100639/*
640 * this flag is only used internally by scrub and may be changed at any time
641 * it is only declared here to avoid collisions
642 */
643#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
644
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400645struct btrfs_tree_block_info {
646 struct btrfs_disk_key key;
647 u8 level;
648} __attribute__ ((__packed__));
649
650struct btrfs_extent_data_ref {
651 __le64 root;
652 __le64 objectid;
653 __le64 offset;
654 __le32 count;
655} __attribute__ ((__packed__));
656
657struct btrfs_shared_data_ref {
658 __le32 count;
659} __attribute__ ((__packed__));
660
661struct btrfs_extent_inline_ref {
662 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400663 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400664} __attribute__ ((__packed__));
665
666/* old style backrefs item */
667struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500668 __le64 root;
669 __le64 generation;
670 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400671 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400672} __attribute__ ((__packed__));
673
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400674
Chris Mason0b86a832008-03-24 15:01:56 -0400675/* dev extents record free space on individual devices. The owner
676 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400677 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400678 */
679struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400680 __le64 chunk_tree;
681 __le64 chunk_objectid;
682 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400683 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400684 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400685} __attribute__ ((__packed__));
686
Chris Mason39544012007-12-12 14:38:19 -0500687struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400688 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500689 __le16 name_len;
690 /* name goes here */
691} __attribute__ ((__packed__));
692
Mark Fashehf1863732012-08-08 11:32:27 -0700693struct btrfs_inode_extref {
694 __le64 parent_objectid;
695 __le64 index;
696 __le16 name_len;
697 __u8 name[0];
698 /* name goes here */
699} __attribute__ ((__packed__));
700
Chris Mason0b86a832008-03-24 15:01:56 -0400701struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400702 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400703 __le32 nsec;
704} __attribute__ ((__packed__));
705
Jan Engelhardt95029d72009-01-21 10:49:16 -0500706enum btrfs_compression_type {
Li Zefan261507a02010-12-17 14:21:50 +0800707 BTRFS_COMPRESS_NONE = 0,
708 BTRFS_COMPRESS_ZLIB = 1,
Li Zefana6fa6fa2010-10-25 15:12:26 +0800709 BTRFS_COMPRESS_LZO = 2,
710 BTRFS_COMPRESS_TYPES = 2,
711 BTRFS_COMPRESS_LAST = 3,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500712};
Chris Masonc8b97812008-10-29 14:49:59 -0400713
Chris Mason1e1d2702007-03-15 19:03:33 -0400714struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400715 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400716 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400717 /* transid that last touched this inode */
718 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400719 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400720 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400721 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400722 __le32 nlink;
723 __le32 uid;
724 __le32 gid;
725 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400726 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500727 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400728
Chris Masonc3027eb2008-12-08 16:40:21 -0500729 /* modification sequence number for NFS */
730 __le64 sequence;
731
732 /*
733 * a little future expansion, for more than this we can
734 * just grow the inode item and version it
735 */
736 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400737 struct btrfs_timespec atime;
738 struct btrfs_timespec ctime;
739 struct btrfs_timespec mtime;
740 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400741} __attribute__ ((__packed__));
742
Chris Masone02119d2008-09-05 16:13:11 -0400743struct btrfs_dir_log_item {
744 __le64 end;
745} __attribute__ ((__packed__));
746
Chris Mason62e27492007-03-15 12:56:47 -0400747struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400748 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400749 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500750 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400751 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400752 u8 type;
753} __attribute__ ((__packed__));
754
Li Zefanb83cc962010-12-20 16:04:08 +0800755#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
756
Chris Mason62e27492007-03-15 12:56:47 -0400757struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400758 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400759 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400760 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400761 __le64 bytenr;
762 __le64 byte_limit;
763 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400764 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500765 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400766 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400767 struct btrfs_disk_key drop_progress;
768 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400769 u8 level;
Alexander Block8ea05e32012-07-25 17:35:53 +0200770
771 /*
772 * The following fields appear after subvol_uuids+subvol_times
773 * were introduced.
774 */
775
776 /*
777 * This generation number is used to test if the new fields are valid
778 * and up to date while reading the root item. Everytime the root item
779 * is written out, the "generation" field is copied into this field. If
780 * anyone ever mounted the fs with an older kernel, we will have
781 * mismatching generation values here and thus must invalidate the
782 * new fields. See btrfs_update_root and btrfs_find_last_root for
783 * details.
784 * the offset of generation_v2 is also used as the start for the memset
785 * when invalidating the fields.
786 */
787 __le64 generation_v2;
788 u8 uuid[BTRFS_UUID_SIZE];
789 u8 parent_uuid[BTRFS_UUID_SIZE];
790 u8 received_uuid[BTRFS_UUID_SIZE];
791 __le64 ctransid; /* updated when an inode changes */
792 __le64 otransid; /* trans when created */
793 __le64 stransid; /* trans when sent. non-zero for received subvol */
794 __le64 rtransid; /* trans when received. non-zero for received subvol */
795 struct btrfs_timespec ctime;
796 struct btrfs_timespec otime;
797 struct btrfs_timespec stime;
798 struct btrfs_timespec rtime;
799 __le64 reserved[8]; /* for future */
Chris Mason9f5fae22007-03-20 14:38:32 -0400800} __attribute__ ((__packed__));
801
Chris Mason0660b5a2008-11-17 20:37:39 -0500802/*
803 * this is used for both forward and backward root refs
804 */
805struct btrfs_root_ref {
806 __le64 dirid;
807 __le64 sequence;
808 __le16 name_len;
809} __attribute__ ((__packed__));
810
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200811struct btrfs_disk_balance_args {
812 /*
813 * profiles to operate on, single is denoted by
814 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
815 */
816 __le64 profiles;
817
818 /* usage filter */
819 __le64 usage;
820
821 /* devid filter */
822 __le64 devid;
823
824 /* devid subset filter [pstart..pend) */
825 __le64 pstart;
826 __le64 pend;
827
828 /* btrfs virtual address space subset filter [vstart..vend) */
829 __le64 vstart;
830 __le64 vend;
831
832 /*
833 * profile to convert to, single is denoted by
834 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
835 */
836 __le64 target;
837
838 /* BTRFS_BALANCE_ARGS_* */
839 __le64 flags;
840
841 __le64 unused[8];
842} __attribute__ ((__packed__));
843
844/*
845 * store balance parameters to disk so that balance can be properly
846 * resumed after crash or unmount
847 */
848struct btrfs_balance_item {
849 /* BTRFS_BALANCE_* */
850 __le64 flags;
851
852 struct btrfs_disk_balance_args data;
853 struct btrfs_disk_balance_args meta;
854 struct btrfs_disk_balance_args sys;
855
856 __le64 unused[4];
857} __attribute__ ((__packed__));
858
Yan Zhengd899e052008-10-30 14:25:28 -0400859#define BTRFS_FILE_EXTENT_INLINE 0
860#define BTRFS_FILE_EXTENT_REG 1
861#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454d2007-04-19 13:37:44 -0400862
Chris Mason9f5fae22007-03-20 14:38:32 -0400863struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400864 /*
865 * transaction id that created this extent
866 */
Chris Mason71951f32007-03-27 09:16:29 -0400867 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400868 /*
869 * max number of bytes to hold this extent in ram
870 * when we split a compressed extent we can't know how big
871 * each of the resulting pieces will be. So, this is
872 * an upper limit on the size of the extent in ram instead of
873 * an exact limit.
874 */
875 __le64 ram_bytes;
876
877 /*
878 * 32 bits for the various ways we might encode the data,
879 * including compression and encryption. If any of these
880 * are set to something a given disk format doesn't understand
881 * it is treated like an incompat flag for reading and writing,
882 * but not for stat.
883 */
884 u8 compression;
885 u8 encryption;
886 __le16 other_encoding; /* spare for later use */
887
888 /* are we inline data or a real extent? */
Chris Mason236454d2007-04-19 13:37:44 -0400889 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400890
Chris Mason9f5fae22007-03-20 14:38:32 -0400891 /*
892 * disk space consumed by the extent, checksum blocks are included
893 * in these numbers
894 */
Chris Masondb945352007-10-15 16:15:53 -0400895 __le64 disk_bytenr;
896 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400897 /*
Chris Masondee26a92007-03-26 16:00:06 -0400898 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400899 * this extent record is for. This allows a file extent to point
900 * into the middle of an existing extent on disk, sharing it
901 * between two snapshots (useful if some bytes in the middle of the
902 * extent have changed
903 */
904 __le64 offset;
905 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400906 * the logical number of file blocks (no csums included). This
907 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400908 */
Chris Masondb945352007-10-15 16:15:53 -0400909 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400910
Chris Mason9f5fae22007-03-20 14:38:32 -0400911} __attribute__ ((__packed__));
912
Chris Masonf254e522007-03-29 15:15:27 -0400913struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400914 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400915} __attribute__ ((__packed__));
916
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200917struct btrfs_dev_stats_item {
918 /*
919 * grow this item struct at the end for future enhancements and keep
920 * the existing values unchanged
921 */
922 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
923} __attribute__ ((__packed__));
924
Stefan Behrense922e082012-11-05 17:26:40 +0100925#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
926#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
927#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
928#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
929#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
930#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
931#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
932
933struct btrfs_dev_replace {
934 u64 replace_state; /* see #define above */
935 u64 time_started; /* seconds since 1-Jan-1970 */
936 u64 time_stopped; /* seconds since 1-Jan-1970 */
937 atomic64_t num_write_errors;
938 atomic64_t num_uncorrectable_read_errors;
939
940 u64 cursor_left;
941 u64 committed_cursor_left;
942 u64 cursor_left_last_write_of_item;
943 u64 cursor_right;
944
945 u64 cont_reading_from_srcdev_mode; /* see #define above */
946
947 int is_valid;
948 int item_needs_writeback;
949 struct btrfs_device *srcdev;
950 struct btrfs_device *tgtdev;
951
952 pid_t lock_owner;
953 atomic_t nesting_level;
954 struct mutex lock_finishing_cancel_unmount;
955 struct mutex lock_management_lock;
956 struct mutex lock;
957
958 struct btrfs_scrub_progress scrub_progress;
959};
960
Stefan Behrensa2bff642012-11-05 17:32:20 +0100961struct btrfs_dev_replace_item {
962 /*
963 * grow this item struct at the end for future enhancements and keep
964 * the existing values unchanged
965 */
966 __le64 src_devid;
967 __le64 cursor_left;
968 __le64 cursor_right;
969 __le64 cont_reading_from_srcdev_mode;
970
971 __le64 replace_state;
972 __le64 time_started;
973 __le64 time_stopped;
974 __le64 num_write_errors;
975 __le64 num_uncorrectable_read_errors;
976} __attribute__ ((__packed__));
977
Chris Mason0b86a832008-03-24 15:01:56 -0400978/* different types of block groups (and chunks) */
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200979#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
980#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
981#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
982#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
983#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
984#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
985#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
Andreas Philipp1c89cdd2013-05-11 11:12:54 +0000986#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
987#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200988#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
Miao Xiee6ec7162013-01-17 05:38:51 +0000989
990enum btrfs_raid_types {
991 BTRFS_RAID_RAID10,
992 BTRFS_RAID_RAID1,
993 BTRFS_RAID_DUP,
994 BTRFS_RAID_RAID0,
995 BTRFS_RAID_SINGLE,
Chris Masone942f882013-02-20 14:06:05 -0500996 BTRFS_RAID_RAID5,
997 BTRFS_RAID_RAID6,
Miao Xiee6ec7162013-01-17 05:38:51 +0000998 BTRFS_NR_RAID_TYPES
999};
Chris Mason1e2677e2007-05-29 16:52:18 -04001000
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001001#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1002 BTRFS_BLOCK_GROUP_SYSTEM | \
1003 BTRFS_BLOCK_GROUP_METADATA)
1004
1005#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1006 BTRFS_BLOCK_GROUP_RAID1 | \
David Woodhouse53b381b2013-01-29 18:40:14 -05001007 BTRFS_BLOCK_GROUP_RAID5 | \
1008 BTRFS_BLOCK_GROUP_RAID6 | \
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001009 BTRFS_BLOCK_GROUP_DUP | \
1010 BTRFS_BLOCK_GROUP_RAID10)
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001011/*
1012 * We need a bit for restriper to be able to tell when chunks of type
1013 * SINGLE are available. This "extended" profile format is used in
1014 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1015 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1016 * to avoid remappings between two formats in future.
1017 */
1018#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1019
Ilya Dryomov899c81e2012-03-27 17:09:16 +03001020#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1021 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1022
1023static inline u64 chunk_to_extended(u64 flags)
1024{
1025 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1026 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1027
1028 return flags;
1029}
1030static inline u64 extended_to_chunk(u64 flags)
1031{
1032 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1033}
1034
Chris Mason9078a3e2007-04-26 16:46:15 -04001035struct btrfs_block_group_item {
1036 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -04001037 __le64 chunk_objectid;
1038 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -04001039} __attribute__ ((__packed__));
1040
Arne Jansen630dc772011-09-13 11:06:07 +02001041/*
1042 * is subvolume quota turned on?
1043 */
1044#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1045/*
Jan Schmidt2f232032013-04-25 16:04:51 +00001046 * RESCAN is set during the initialization phase
Arne Jansen630dc772011-09-13 11:06:07 +02001047 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001048#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
Arne Jansen630dc772011-09-13 11:06:07 +02001049/*
1050 * Some qgroup entries are known to be out of date,
1051 * either because the configuration has changed in a way that
1052 * makes a rescan necessary, or because the fs has been mounted
1053 * with a non-qgroup-aware version.
1054 * Turning qouta off and on again makes it inconsistent, too.
1055 */
1056#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1057
1058#define BTRFS_QGROUP_STATUS_VERSION 1
1059
1060struct btrfs_qgroup_status_item {
1061 __le64 version;
1062 /*
1063 * the generation is updated during every commit. As older
1064 * versions of btrfs are not aware of qgroups, it will be
1065 * possible to detect inconsistencies by checking the
1066 * generation on mount time
1067 */
1068 __le64 generation;
1069
1070 /* flag definitions see above */
1071 __le64 flags;
1072
1073 /*
1074 * only used during scanning to record the progress
1075 * of the scan. It contains a logical address
1076 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001077 __le64 rescan;
Arne Jansen630dc772011-09-13 11:06:07 +02001078} __attribute__ ((__packed__));
1079
1080struct btrfs_qgroup_info_item {
1081 __le64 generation;
1082 __le64 rfer;
1083 __le64 rfer_cmpr;
1084 __le64 excl;
1085 __le64 excl_cmpr;
1086} __attribute__ ((__packed__));
1087
1088/* flags definition for qgroup limits */
1089#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1090#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1091#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1092#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1093#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1094#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1095
1096struct btrfs_qgroup_limit_item {
1097 /*
1098 * only updated when any of the other values change
1099 */
1100 __le64 flags;
1101 __le64 max_rfer;
1102 __le64 max_excl;
1103 __le64 rsv_rfer;
1104 __le64 rsv_excl;
1105} __attribute__ ((__packed__));
1106
Chris Mason6324fbf2008-03-24 15:01:59 -04001107struct btrfs_space_info {
Miao Xie26b47ff2014-01-15 20:00:54 +08001108 spinlock_t lock;
Josef Bacik6a632092009-02-20 11:00:09 -05001109
Josef Bacik89a55892010-10-14 14:52:27 -04001110 u64 total_bytes; /* total bytes in the space,
1111 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001112 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -07001113 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -05001114 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1115 transaction finishes */
1116 u64 bytes_reserved; /* total bytes the allocator has reserved for
1117 current allocations */
Josef Bacik6a632092009-02-20 11:00:09 -05001118 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -04001119 delalloc/allocations */
Miao Xie26b47ff2014-01-15 20:00:54 +08001120 u64 bytes_readonly; /* total bytes that are read only */
1121
1122 unsigned int full:1; /* indicates that we cannot allocate any more
1123 chunks for this space */
1124 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1125
1126 unsigned int flush:1; /* set if we are trying to make space */
1127
1128 unsigned int force_alloc; /* set if we need to force a chunk
1129 alloc for this space */
1130
Yan, Zhengb742bb82010-05-16 10:46:24 -04001131 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -04001132 u64 disk_total; /* total bytes on disk, takes mirrors into
1133 account */
Josef Bacik6a632092009-02-20 11:00:09 -05001134
Miao Xie26b47ff2014-01-15 20:00:54 +08001135 u64 flags;
1136
Chris Mason36e39c42011-03-12 07:08:42 -05001137 /*
Josef Bacikb150a4f2013-06-19 15:00:04 -04001138 * bytes_pinned is kept in line with what is actually pinned, as in
1139 * we've called update_block_group and dropped the bytes_used counter
1140 * and increased the bytes_pinned counter. However this means that
1141 * bytes_pinned does not reflect the bytes that will be pinned once the
1142 * delayed refs are flushed, so this counter is inc'ed everytime we call
1143 * btrfs_free_extent so it is a realtime count of what will be freed
1144 * once the transaction is committed. It will be zero'ed everytime the
1145 * transaction commits.
1146 */
1147 struct percpu_counter total_bytes_pinned;
1148
Chris Mason6324fbf2008-03-24 15:01:59 -04001149 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001150
Miao Xie26b47ff2014-01-15 20:00:54 +08001151 struct rw_semaphore groups_sem;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001152 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001153 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacikfdb5eff2011-06-07 16:07:44 -04001154 wait_queue_head_t wait;
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001155
1156 struct kobject kobj;
1157 struct kobject block_group_kobjs[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -04001158};
1159
Miao Xie66d8f3d2012-09-06 04:02:28 -06001160#define BTRFS_BLOCK_RSV_GLOBAL 1
1161#define BTRFS_BLOCK_RSV_DELALLOC 2
1162#define BTRFS_BLOCK_RSV_TRANS 3
1163#define BTRFS_BLOCK_RSV_CHUNK 4
1164#define BTRFS_BLOCK_RSV_DELOPS 5
1165#define BTRFS_BLOCK_RSV_EMPTY 6
1166#define BTRFS_BLOCK_RSV_TEMP 7
1167
Yan, Zhengf0486c62010-05-16 10:46:25 -04001168struct btrfs_block_rsv {
1169 u64 size;
1170 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001171 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001172 spinlock_t lock;
Miao Xie66d8f3d2012-09-06 04:02:28 -06001173 unsigned short full;
1174 unsigned short type;
1175 unsigned short failfast;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001176};
1177
Chris Masonfa9c0d792009-04-03 09:47:43 -04001178/*
1179 * free clusters are used to claim free space in relatively large chunks,
1180 * allowing us to do less seeky writes. They are used for all metadata
1181 * allocations and data allocations in ssd mode.
1182 */
1183struct btrfs_free_cluster {
1184 spinlock_t lock;
1185 spinlock_t refill_lock;
1186 struct rb_root root;
1187
1188 /* largest extent in this cluster */
1189 u64 max_size;
1190
1191 /* first extent starting offset */
1192 u64 window_start;
1193
1194 struct btrfs_block_group_cache *block_group;
1195 /*
1196 * when a cluster is allocated from a block group, we put the
1197 * cluster onto a list in the block group so that it can
1198 * be freed before the block group is freed.
1199 */
1200 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -04001201};
1202
Josef Bacik817d52f2009-07-13 21:29:25 -04001203enum btrfs_caching_type {
1204 BTRFS_CACHE_NO = 0,
1205 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -05001206 BTRFS_CACHE_FAST = 2,
1207 BTRFS_CACHE_FINISHED = 3,
Josef Bacik36cce922013-08-05 11:15:21 -04001208 BTRFS_CACHE_ERROR = 4,
Josef Bacik817d52f2009-07-13 21:29:25 -04001209};
1210
Josef Bacik0af3d002010-06-21 14:48:16 -04001211enum btrfs_disk_cache_state {
1212 BTRFS_DC_WRITTEN = 0,
1213 BTRFS_DC_ERROR = 1,
1214 BTRFS_DC_CLEAR = 2,
1215 BTRFS_DC_SETUP = 3,
1216 BTRFS_DC_NEED_WRITE = 4,
1217};
1218
Yan Zheng11833d62009-09-11 16:11:19 -04001219struct btrfs_caching_control {
1220 struct list_head list;
1221 struct mutex mutex;
1222 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001223 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -04001224 struct btrfs_block_group_cache *block_group;
1225 u64 progress;
1226 atomic_t count;
1227};
1228
Chris Mason9078a3e2007-04-26 16:46:15 -04001229struct btrfs_block_group_cache {
1230 struct btrfs_key key;
1231 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -04001232 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -04001233 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -04001234 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -05001235 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -04001236 u64 reserved;
Josef Bacik1b2da372009-09-11 16:11:20 -04001237 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -04001238 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -04001239 u64 sectorsize;
Josef Bacik5b0e95b2011-10-06 08:58:24 -04001240 u64 cache_generation;
David Woodhouse53b381b2013-01-29 18:40:14 -05001241
1242 /* for raid56, this is a full stripe, without parity */
1243 unsigned long full_stripe_len;
1244
Mariusz Kozlowski0410c942010-11-20 12:03:07 +00001245 unsigned int ro:1;
1246 unsigned int dirty:1;
1247 unsigned int iref:1;
Josef Bacik0af3d002010-06-21 14:48:16 -04001248
1249 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001250
Josef Bacik817d52f2009-07-13 21:29:25 -04001251 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -04001252 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -04001253 struct btrfs_caching_control *caching_ctl;
1254 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -04001255
Josef Bacik0f9dd462008-09-23 13:14:11 -04001256 struct btrfs_space_info *space_info;
1257
1258 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +08001259 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001260
1261 /* block group cache stuff */
1262 struct rb_node cache_node;
1263
1264 /* for block groups in the same raid type */
1265 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -05001266
1267 /* usage count */
1268 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -04001269
1270 /* List of struct btrfs_free_clusters for this block group.
1271 * Today it will only have one thing on it, but that may change
1272 */
1273 struct list_head cluster_list;
Josef Bacikea658ba2012-09-11 16:57:25 -04001274
1275 /* For delayed block group creation */
1276 struct list_head new_bg_list;
Chris Mason9078a3e2007-04-26 16:46:15 -04001277};
Chris Mason0b86a832008-03-24 15:01:56 -04001278
Jan Schmidt097b8a72012-06-21 11:08:04 +02001279/* delayed seq elem */
1280struct seq_list {
1281 struct list_head list;
1282 u64 seq;
1283};
1284
Josef Bacik5d803662013-02-07 16:06:02 -05001285enum btrfs_orphan_cleanup_state {
1286 ORPHAN_CLEANUP_STARTED = 1,
1287 ORPHAN_CLEANUP_DONE = 2,
1288};
1289
David Woodhouse53b381b2013-01-29 18:40:14 -05001290/* used by the raid56 code to lock stripes for read/modify/write */
1291struct btrfs_stripe_hash {
1292 struct list_head hash_list;
1293 wait_queue_head_t wait;
1294 spinlock_t lock;
1295};
1296
1297/* used by the raid56 code to lock stripes for read/modify/write */
1298struct btrfs_stripe_hash_table {
Chris Mason4ae10b32013-01-31 14:42:09 -05001299 struct list_head stripe_cache;
1300 spinlock_t cache_lock;
1301 int cache_size;
1302 struct btrfs_stripe_hash table[];
David Woodhouse53b381b2013-01-29 18:40:14 -05001303};
1304
1305#define BTRFS_STRIPE_HASH_TABLE_BITS 11
1306
Jan Schmidt097b8a72012-06-21 11:08:04 +02001307/* fs_info */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001308struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -04001309struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -04001310struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001311struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +08001312struct btrfs_delayed_root;
Chris Mason9f5fae22007-03-20 14:38:32 -04001313struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -04001314 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -04001315 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -04001316 struct btrfs_root *extent_root;
1317 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -04001318 struct btrfs_root *chunk_root;
1319 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -05001320 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -05001321 struct btrfs_root *csum_root;
Arne Jansen416ac512011-09-13 12:56:09 +02001322 struct btrfs_root *quota_root;
Stefan Behrensf7a81ea2013-08-15 17:11:19 +02001323 struct btrfs_root *uuid_root;
Chris Masone02119d2008-09-05 16:13:11 -04001324
1325 /* the log root tree is a directory of all the other log roots */
1326 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001327
1328 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -04001329 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -04001330
Josef Bacik0f9dd462008-09-23 13:14:11 -04001331 /* block group cache stuff */
1332 spinlock_t block_group_cache_lock;
Liu Boa1897fd2012-12-27 09:01:23 +00001333 u64 first_logical_byte;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001334 struct rb_root block_group_cache_tree;
1335
Josef Bacik2bf64752011-09-26 17:12:22 -04001336 /* keep track of unallocated space */
1337 spinlock_t free_chunk_lock;
1338 u64 free_chunk_space;
1339
Yan Zheng11833d62009-09-11 16:11:19 -04001340 struct extent_io_tree freed_extents[2];
1341 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -04001342
Chris Mason0b86a832008-03-24 15:01:56 -04001343 /* logical->physical extent mapping */
1344 struct btrfs_mapping_tree mapping_tree;
1345
Miao Xie16cdcec2011-04-22 18:12:22 +08001346 /*
1347 * block reservation for extent, checksum, root tree and
1348 * delayed dir index item
1349 */
Yan, Zhengf0486c62010-05-16 10:46:25 -04001350 struct btrfs_block_rsv global_block_rsv;
1351 /* block reservation for delay allocation */
1352 struct btrfs_block_rsv delalloc_block_rsv;
1353 /* block reservation for metadata operations */
1354 struct btrfs_block_rsv trans_block_rsv;
1355 /* block reservation for chunk tree */
1356 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -04001357 /* block reservation for delayed operations */
1358 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001359
1360 struct btrfs_block_rsv empty_block_rsv;
1361
Chris Mason293ffd52007-03-20 15:57:25 -04001362 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -04001363 u64 last_trans_committed;
Josef Bacik0a2b2a82014-01-23 10:54:11 -05001364 u64 avg_delayed_ref_runtime;
Chris Mason12fcfd22009-03-24 10:24:20 -04001365
1366 /*
1367 * this is updated to the current trans every time a full commit
1368 * is required instead of the faster short fsync log commits
1369 */
1370 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +02001371 unsigned long mount_opt;
Li Zefan261507a02010-12-17 14:21:50 +08001372 unsigned long compress_type:4;
David Sterba8b87dc12013-08-01 18:14:52 +02001373 int commit_interval;
Miao Xie8c6a3ee2013-01-29 10:05:05 +00001374 /*
1375 * It is a suggestive number, the read side is safe even it gets a
1376 * wrong number because we will write out the data into a regular
1377 * extent. The write side(mount/remount) is under ->s_umount lock,
1378 * so it is also safe.
1379 */
Chris Mason6f568d32008-01-29 16:03:38 -05001380 u64 max_inline;
Miao Xiec018dae2013-01-29 10:07:33 +00001381 /*
1382 * Protected by ->chunk_mutex and sb->s_umount.
1383 *
1384 * The reason that we use two lock to protect it is because only
1385 * remount and mount operations can change it and these two operations
1386 * are under sb->s_umount, but the read side (chunk allocation) can not
1387 * acquire sb->s_umount or the deadlock would happen. So we use two
1388 * locks to protect it. On the write side, we must acquire two locks,
1389 * and on the read side, we just need acquire one of them.
1390 */
Chris Mason8f662a72008-01-02 10:01:11 -05001391 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -04001392 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001393 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -04001394 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -04001395 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -05001396 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -04001397
Miao Xieceda0862013-04-11 10:30:16 +00001398 /*
1399 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1400 * when they are updated.
1401 *
1402 * Because we do not clear the flags for ever, so we needn't use
1403 * the lock on the read side.
1404 *
1405 * We also needn't use the lock when we mount the fs, because
1406 * there is no other task which will update the flag.
1407 */
1408 spinlock_t super_lock;
David Sterba6c417612011-04-13 15:41:04 +02001409 struct btrfs_super_block *super_copy;
1410 struct btrfs_super_block *super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -04001411 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -04001412 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -04001413 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -04001414 struct backing_dev_info bdi;
Chris Masone02119d2008-09-05 16:13:11 -04001415 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -04001416 struct mutex transaction_kthread_mutex;
1417 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -04001418 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -04001419 struct mutex volume_mutex;
David Woodhouse53b381b2013-01-29 18:40:14 -05001420
1421 /* this is used during read/modify/write to make sure
1422 * no two ios are trying to mod the same stripe at the same
1423 * time
1424 */
1425 struct btrfs_stripe_hash_table *stripe_hash_table;
1426
Chris Mason5a3f23d2009-03-31 13:27:11 -04001427 /*
1428 * this protects the ordered operations list only while we are
1429 * processing all of the entries on it. This way we make
1430 * sure the commit code doesn't find the list temporarily empty
1431 * because another function happens to be doing non-waiting preflush
1432 * before jumping into the main commit.
1433 */
1434 struct mutex ordered_operations_mutex;
Josef Bacik9ffba8c2013-08-14 11:33:56 -04001435
1436 /*
1437 * Same as ordered_operations_mutex except this is for ordered extents
1438 * and not the operations.
1439 */
1440 struct mutex ordered_extent_flush_mutex;
1441
Yan Zheng11833d62009-09-11 16:11:19 -04001442 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001443
Yan, Zhengc71bf092009-11-12 09:34:40 +00001444 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001445
Yan, Zhengc71bf092009-11-12 09:34:40 +00001446 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001447 struct srcu_struct subvol_srcu;
1448
Josef Bacika4abeea2011-04-11 17:25:13 -04001449 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -04001450 /*
1451 * the reloc mutex goes with the trans lock, it is taken
1452 * during commit to protect us from the relocation code
1453 */
1454 struct mutex reloc_mutex;
1455
Chris Mason8fd17792007-04-19 21:01:03 -04001456 struct list_head trans_list;
Chris Masonfacda1e2007-06-08 18:11:48 -04001457 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -04001458 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -04001459
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001460 spinlock_t delayed_iput_lock;
1461 struct list_head delayed_iputs;
1462
Jan Schmidtf29021b2012-05-16 17:55:38 +02001463 /* this protects tree_mod_seq_list */
1464 spinlock_t tree_mod_seq_lock;
Jan Schmidtfc36ed7e2013-04-24 16:57:33 +00001465 atomic64_t tree_mod_seq;
Jan Schmidtf29021b2012-05-16 17:55:38 +02001466 struct list_head tree_mod_seq_list;
1467
1468 /* this protects tree_mod_log */
1469 rwlock_t tree_mod_log_lock;
1470 struct rb_root tree_mod_log;
1471
Chris Masoncb03c742008-05-15 16:15:45 -04001472 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -04001473 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -04001474 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -05001475 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -04001476 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -04001477
Chris Mason8b712842008-06-11 16:50:36 -04001478 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001479 * this is used to protect the following list -- ordered_roots.
Chris Mason3eaa2882008-07-24 11:57:52 -04001480 */
Miao Xie199c2a92013-05-15 07:48:23 +00001481 spinlock_t ordered_root_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001482
1483 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001484 * all fs/file tree roots in which there are data=ordered extents
1485 * pending writeback are added into this list.
1486 *
Chris Mason5a3f23d2009-03-31 13:27:11 -04001487 * these can span multiple transactions and basically include
1488 * every dirty data page that isn't from nodatacow
1489 */
Miao Xie199c2a92013-05-15 07:48:23 +00001490 struct list_head ordered_roots;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001491
Miao Xieeb73c1b2013-05-15 07:48:22 +00001492 spinlock_t delalloc_root_lock;
1493 /* all fs/file tree roots that have delalloc inodes. */
1494 struct list_head delalloc_roots;
Chris Mason3eaa2882008-07-24 11:57:52 -04001495
1496 /*
Chris Mason8b712842008-06-11 16:50:36 -04001497 * there is a pool of worker threads for checksumming during writes
1498 * and a pool for checksumming after reads. This is because readers
1499 * can run with FS locks held, and the writers may be waiting for
1500 * those locks. We don't want ordering in the pending list to cause
1501 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -04001502 *
1503 * A third pool does submit_bio to avoid deadlocking with the other
1504 * two
Chris Mason8b712842008-06-11 16:50:36 -04001505 */
Chris Mason61d92c32009-10-02 19:11:56 -04001506 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -04001507 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -05001508 struct btrfs_workers delalloc_workers;
Miao Xie8ccf6f192012-10-25 09:28:04 +00001509 struct btrfs_workers flush_workers;
Chris Mason8b712842008-06-11 16:50:36 -04001510 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -05001511 struct btrfs_workers endio_meta_workers;
David Woodhouse53b381b2013-01-29 18:40:14 -05001512 struct btrfs_workers endio_raid56_workers;
1513 struct btrfs_workers rmw_workers;
Chris Masoncad321a2008-12-17 14:51:42 -05001514 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001515 struct btrfs_workers endio_write_workers;
Josef Bacik0cb59c92010-07-02 12:14:14 -04001516 struct btrfs_workers endio_freespace_worker;
Chris Mason1cc127b2008-06-12 14:46:17 -04001517 struct btrfs_workers submit_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001518 struct btrfs_workers caching_workers;
Arne Jansen90519d62011-05-23 14:30:00 +02001519 struct btrfs_workers readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001520
Chris Mason247e7432008-07-17 12:53:51 -04001521 /*
1522 * fixup workers take dirty pages that didn't properly go through
1523 * the cow mechanism and make them safe to write. It happens
1524 * for the sys_munmap function call path
1525 */
1526 struct btrfs_workers fixup_workers;
Miao Xie16cdcec2011-04-22 18:12:22 +08001527 struct btrfs_workers delayed_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001528 struct task_struct *transaction_kthread;
1529 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001530 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001531
Josef Bacik58176a92007-08-29 15:47:34 -04001532 struct kobject super_kobj;
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001533 struct kobject *space_info_kobj;
Jeff Mahoney29e5be22013-11-01 13:07:05 -04001534 struct kobject *device_dir_kobj;
Josef Bacik58176a92007-08-29 15:47:34 -04001535 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -04001536 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001537 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001538 int log_root_recovering;
Chris Mason62e27492007-03-15 12:56:47 -04001539
Yan324ae4d2007-11-16 14:57:08 -05001540 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001541
Miao Xiee2d84522013-01-29 10:09:20 +00001542 /* used to keep from writing metadata until there is a nice batch */
1543 struct percpu_counter dirty_metadata_bytes;
Miao Xie963d6782013-01-29 10:10:51 +00001544 struct percpu_counter delalloc_bytes;
Miao Xiee2d84522013-01-29 10:09:20 +00001545 s32 dirty_metadata_batch;
Miao Xie963d6782013-01-29 10:10:51 +00001546 s32 delalloc_batch;
1547
Chris Mason0b86a832008-03-24 15:01:56 -04001548 struct list_head dirty_cowonly_roots;
1549
Chris Mason8a4b83c2008-03-24 15:02:07 -04001550 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001551
1552 /*
1553 * the space_info list is almost entirely read only. It only changes
1554 * when we add a new raid type to the FS, and that happens
1555 * very rarely. RCU is used to protect it.
1556 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001557 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001558
Li Zefanb4d7c3c2012-07-09 20:21:07 -06001559 struct btrfs_space_info *data_sinfo;
1560
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001561 struct reloc_control *reloc_ctl;
1562
Chris Masonfa9c0d792009-04-03 09:47:43 -04001563 /* data_alloc_cluster is only used in ssd mode */
1564 struct btrfs_free_cluster data_alloc_cluster;
1565
1566 /* all metadata allocations go through this cluster */
1567 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001568
Chris Mason4cb53002011-05-24 15:35:30 -04001569 /* auto defrag inodes go here */
1570 spinlock_t defrag_inodes_lock;
1571 struct rb_root defrag_inodes;
1572 atomic_t defrag_running;
1573
Miao Xiede98ced2013-01-29 10:13:12 +00001574 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1575 seqlock_t profiles_lock;
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001576 /*
1577 * these three are in extended format (availability of single
1578 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1579 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1580 */
Chris Masond18a2c42008-04-04 15:40:00 -04001581 u64 avail_data_alloc_bits;
1582 u64 avail_metadata_alloc_bits;
1583 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -04001584
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001585 /* restriper state */
1586 spinlock_t balance_lock;
1587 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001588 atomic_t balance_running;
1589 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +02001590 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001591 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001592 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001593
Josef Bacik97e728d2009-04-21 17:40:57 -04001594 unsigned data_chunk_allocations;
1595 unsigned metadata_ratio;
1596
Chris Mason788f20e2008-04-28 15:29:42 -04001597 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001598
Arne Jansena2de7332011-03-08 14:14:00 +01001599 /* private scrub information */
1600 struct mutex scrub_lock;
1601 atomic_t scrubs_running;
1602 atomic_t scrub_pause_req;
1603 atomic_t scrubs_paused;
1604 atomic_t scrub_cancel_req;
1605 wait_queue_head_t scrub_pause_wait;
Arne Jansena2de7332011-03-08 14:14:00 +01001606 int scrub_workers_refcnt;
1607 struct btrfs_workers scrub_workers;
Stefan Behrensff023aa2012-11-06 11:43:11 +01001608 struct btrfs_workers scrub_wr_completion_workers;
1609 struct btrfs_workers scrub_nocow_workers;
Arne Jansena2de7332011-03-08 14:14:00 +01001610
Stefan Behrens21adbd52011-11-09 13:44:05 +01001611#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1612 u32 check_integrity_print_mask;
1613#endif
Arne Jansen416ac512011-09-13 12:56:09 +02001614 /*
1615 * quota information
1616 */
1617 unsigned int quota_enabled:1;
1618
1619 /*
1620 * quota_enabled only changes state after a commit. This holds the
1621 * next state.
1622 */
1623 unsigned int pending_quota_state:1;
1624
1625 /* is qgroup tracking in a consistent state? */
1626 u64 qgroup_flags;
1627
1628 /* holds configuration and tracking. Protected by qgroup_lock */
1629 struct rb_root qgroup_tree;
1630 spinlock_t qgroup_lock;
1631
Wang Shilong1e8f9152013-05-06 11:03:27 +00001632 /*
1633 * used to avoid frequently calling ulist_alloc()/ulist_free()
1634 * when doing qgroup accounting, it must be protected by qgroup_lock.
1635 */
1636 struct ulist *qgroup_ulist;
1637
Wang Shilongf2f6ed32013-04-07 10:50:16 +00001638 /* protect user change for quota operations */
1639 struct mutex qgroup_ioctl_lock;
1640
Arne Jansen416ac512011-09-13 12:56:09 +02001641 /* list of dirty qgroups to be written at next commit */
1642 struct list_head dirty_qgroups;
1643
1644 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1645 u64 qgroup_seq;
Stefan Behrens21adbd52011-11-09 13:44:05 +01001646
Jan Schmidt2f232032013-04-25 16:04:51 +00001647 /* qgroup rescan items */
1648 struct mutex qgroup_rescan_lock; /* protects the progress item */
1649 struct btrfs_key qgroup_rescan_progress;
1650 struct btrfs_workers qgroup_rescan_workers;
Jan Schmidt57254b6e2013-05-06 19:14:17 +00001651 struct completion qgroup_rescan_completion;
Jan Schmidtb382a322013-05-28 15:47:24 +00001652 struct btrfs_work qgroup_rescan_work;
Jan Schmidt2f232032013-04-25 16:04:51 +00001653
liuboacce9522011-01-06 19:30:25 +08001654 /* filesystem state */
Miao Xie87533c42013-01-29 10:14:48 +00001655 unsigned long fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001656
1657 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001658
Arne Jansen90519d62011-05-23 14:30:00 +02001659 /* readahead tree */
1660 spinlock_t reada_lock;
1661 struct radix_tree_root reada_tree;
Chris Mason531f4b1a2011-11-06 03:05:08 -05001662
Josef Bacikf28491e2013-12-16 13:24:27 -05001663 /* Extent buffer radix tree */
1664 spinlock_t buffer_lock;
1665 struct radix_tree_root buffer_radix;
1666
Chris Masonaf31f5e2011-11-03 15:17:42 -04001667 /* next backup root to be overwritten */
1668 int backup_root_index;
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02001669
1670 int num_tolerated_disk_barrier_failures;
Stefan Behrense922e082012-11-05 17:26:40 +01001671
1672 /* device replace state */
1673 struct btrfs_dev_replace dev_replace;
Stefan Behrens5ac00ad2012-11-05 17:54:08 +01001674
1675 atomic_t mutually_exclusive_operation_running;
Stefan Behrens803b2f52013-08-15 17:11:21 +02001676
1677 struct semaphore uuid_tree_rescan_sem;
Stefan Behrens70f80172013-08-15 17:11:23 +02001678 unsigned int update_uuid_tree_gen:1;
Yan324ae4d2007-11-16 14:57:08 -05001679};
Chris Mason0b86a832008-03-24 15:01:56 -04001680
Chris Mason62e27492007-03-15 12:56:47 -04001681/*
1682 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001683 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001684 */
1685struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001686 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001687
Chris Mason5f39d392007-10-15 16:14:19 -04001688 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001689 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001690 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001691
Chris Mason62e27492007-03-15 12:56:47 -04001692 struct btrfs_root_item root_item;
1693 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001694 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001695 struct extent_io_tree dirty_log_pages;
1696
Josef Bacik58176a92007-08-29 15:47:34 -04001697 struct kobject root_kobj;
1698 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001699 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001700
Yan, Zhengf0486c62010-05-16 10:46:25 -04001701 spinlock_t accounting_lock;
1702 struct btrfs_block_rsv *block_rsv;
1703
Li Zefan581bb052011-04-20 10:06:11 +08001704 /* free ino cache stuff */
1705 struct mutex fs_commit_mutex;
1706 struct btrfs_free_space_ctl *free_ino_ctl;
1707 enum btrfs_caching_type cached;
1708 spinlock_t cache_lock;
1709 wait_queue_head_t cache_wait;
1710 struct btrfs_free_space_ctl *free_ino_pinned;
1711 u64 cache_progress;
Li Zefan82d59022011-04-20 10:33:24 +08001712 struct inode *cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001713
Chris Masone02119d2008-09-05 16:13:11 -04001714 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001715 wait_queue_head_t log_writer_wait;
1716 wait_queue_head_t log_commit_wait[2];
1717 atomic_t log_writers;
1718 atomic_t log_commit[2];
Miao Xie2ecb7922012-09-06 04:04:27 -06001719 atomic_t log_batch;
Yan Zheng7237f182009-01-21 12:54:03 -05001720 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001721 unsigned long last_log_commit;
Josef Bacikff782e02009-10-08 15:30:04 -04001722 pid_t log_start_pid;
1723 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001724
Chris Mason0f7d52f2007-04-09 10:42:37 -04001725 u64 objectid;
1726 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001727
1728 /* data allocations are done in sectorsize units */
1729 u32 sectorsize;
1730
1731 /* node allocations are done in nodesize units */
1732 u32 nodesize;
1733
1734 /* leaf allocations are done in leafsize units */
1735 u32 leafsize;
1736
Chris Mason87ee04e2007-11-30 11:30:34 -05001737 u32 stripesize;
1738
Chris Mason9f5fae22007-03-20 14:38:32 -04001739 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001740
1741 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001742
1743 /* btrfs_record_root_in_trans is a multi-step process,
1744 * and it can race with the balancing code. But the
1745 * race is very small, and only the first time the root
1746 * is added to each transaction. So in_trans_setup
1747 * is used to tell us when more checks are required
1748 */
1749 unsigned long in_trans_setup;
Chris Mason9f3a7422007-08-07 15:52:19 -04001750 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001751 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001752 int in_radix;
Josef Bacik06ea65a2013-09-19 16:07:01 -04001753#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1754 int dummy_root;
1755#endif
Chris Mason3f157a22008-06-25 16:01:31 -04001756 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001757 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001758 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001759 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001760 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001761
1762 /* the dirty list is only used by non-reference counted roots */
1763 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001764
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001765 struct list_head root_list;
1766
Josef Bacik2ab28f32012-10-12 15:27:49 -04001767 spinlock_t log_extents_lock[2];
1768 struct list_head logged_list[2];
1769
Yan, Zhengd68fc572010-05-16 10:49:58 -04001770 spinlock_t orphan_lock;
Josef Bacik8a35d952012-05-23 14:26:42 -04001771 atomic_t orphan_inodes;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001772 struct btrfs_block_rsv *orphan_block_rsv;
1773 int orphan_item_inserted;
1774 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001775
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001776 spinlock_t inode_lock;
1777 /* red-black tree that keeps track of in-memory inodes */
1778 struct rb_root inode_tree;
1779
Chris Mason3394e162008-11-17 20:42:26 -05001780 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001781 * radix tree that keeps track of delayed nodes of every inode,
1782 * protected by inode_lock
1783 */
1784 struct radix_tree_root delayed_nodes_tree;
1785 /*
Chris Mason3394e162008-11-17 20:42:26 -05001786 * right now this just gets used so that a root has its own devid
1787 * for stat. It may be used for more later
1788 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001789 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001790
1791 int force_cow;
Alexander Block8ea05e32012-07-25 17:35:53 +02001792
Anand Jain5f3ab902012-12-07 09:28:54 +00001793 spinlock_t root_item_lock;
Miao Xieb0feb9d2013-05-15 07:48:20 +00001794 atomic_t refs;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001795
1796 spinlock_t delalloc_lock;
1797 /*
1798 * all of the inodes that have delalloc bytes. It is possible for
1799 * this list to be empty even when there is still dirty data=ordered
1800 * extents waiting to finish IO.
1801 */
1802 struct list_head delalloc_inodes;
1803 struct list_head delalloc_root;
1804 u64 nr_delalloc_inodes;
Miao Xie199c2a92013-05-15 07:48:23 +00001805 /*
1806 * this is used by the balancing code to wait for all the pending
1807 * ordered extents
1808 */
1809 spinlock_t ordered_extent_lock;
1810
1811 /*
1812 * all of the data=ordered extents pending writeback
1813 * these can span multiple transactions and basically include
1814 * every dirty data page that isn't from nodatacow
1815 */
1816 struct list_head ordered_extents;
1817 struct list_head ordered_root;
1818 u64 nr_ordered_extents;
David Sterba2c686532013-12-16 17:34:17 +01001819
1820 /*
1821 * Number of currently running SEND ioctls to prevent
1822 * manipulation with the read-only status via SUBVOL_SETFLAGS
1823 */
1824 int send_in_progress;
Chris Mason62e27492007-03-15 12:56:47 -04001825};
1826
Chris Mason4cb53002011-05-24 15:35:30 -04001827struct btrfs_ioctl_defrag_range_args {
1828 /* start of the defrag operation */
1829 __u64 start;
1830
1831 /* number of bytes to defrag, use (u64)-1 to say all */
1832 __u64 len;
1833
1834 /*
1835 * flags for the operation, which can include turning
1836 * on compression for this one defrag
1837 */
1838 __u64 flags;
1839
1840 /*
1841 * any extent bigger than this will be considered
1842 * already defragged. Use 0 to take the kernel default
1843 * Use 1 to say every single extent must be rewritten
1844 */
1845 __u32 extent_thresh;
1846
1847 /*
1848 * which compression method to use if turning on compression
1849 * for this defrag operation. If unspecified, zlib will
1850 * be used
1851 */
1852 __u32 compress_type;
1853
1854 /* spare for later */
1855 __u32 unused[4];
1856};
1857
1858
Chris Mason1e1d2702007-03-15 19:03:33 -04001859/*
1860 * inode items have the data typically returned from stat and store other
1861 * info about object characteristics. There is one for every file and dir in
1862 * the FS
1863 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001864#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001865#define BTRFS_INODE_REF_KEY 12
Mark Fashehf1863732012-08-08 11:32:27 -07001866#define BTRFS_INODE_EXTREF_KEY 13
Chris Mason0660b5a2008-11-17 20:37:39 -05001867#define BTRFS_XATTR_ITEM_KEY 24
1868#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001869/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001870
1871/*
1872 * dir items are the name -> inode pointers in a directory. There is one
1873 * for every name in a directory.
1874 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001875#define BTRFS_DIR_LOG_ITEM_KEY 60
1876#define BTRFS_DIR_LOG_INDEX_KEY 72
1877#define BTRFS_DIR_ITEM_KEY 84
1878#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001879/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001880 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001881 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001882#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001883
Chris Mason1e1d2702007-03-15 19:03:33 -04001884/*
Chris Masond20f7042008-12-08 16:58:54 -05001885 * extent csums are stored in a separate tree and hold csums for
1886 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001887 */
Chris Masond20f7042008-12-08 16:58:54 -05001888#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001889
1890/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001891 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001892 * tree used by the super block to find all the other trees
1893 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001894#define BTRFS_ROOT_ITEM_KEY 132
1895
1896/*
1897 * root backrefs tie subvols and snapshots to the directory entries that
1898 * reference them
1899 */
1900#define BTRFS_ROOT_BACKREF_KEY 144
1901
1902/*
1903 * root refs make a fast index for listing all of the snapshots and
1904 * subvolumes referenced by a given root. They point directly to the
1905 * directory item in the root that references the subvol
1906 */
1907#define BTRFS_ROOT_REF_KEY 156
1908
Chris Mason1e1d2702007-03-15 19:03:33 -04001909/*
1910 * extent items are in the extent map tree. These record which blocks
1911 * are used, and how many references there are to each block
1912 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001913#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001914
Josef Bacik3173a182013-03-07 14:22:04 -05001915/*
1916 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1917 * the length, so we save the level in key->offset instead of the length.
1918 */
1919#define BTRFS_METADATA_ITEM_KEY 169
1920
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001921#define BTRFS_TREE_BLOCK_REF_KEY 176
1922
1923#define BTRFS_EXTENT_DATA_REF_KEY 178
1924
1925#define BTRFS_EXTENT_REF_V0_KEY 180
1926
1927#define BTRFS_SHARED_BLOCK_REF_KEY 182
1928
1929#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001930
1931/*
1932 * block groups give us hints into the extent allocation trees. Which
1933 * blocks are free etc etc
1934 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001935#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001936
Chris Mason0660b5a2008-11-17 20:37:39 -05001937#define BTRFS_DEV_EXTENT_KEY 204
1938#define BTRFS_DEV_ITEM_KEY 216
1939#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001940
Arne Jansen630dc772011-09-13 11:06:07 +02001941/*
1942 * Records the overall state of the qgroups.
1943 * There's only one instance of this key present,
1944 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1945 */
1946#define BTRFS_QGROUP_STATUS_KEY 240
1947/*
1948 * Records the currently used space of the qgroup.
1949 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1950 */
1951#define BTRFS_QGROUP_INFO_KEY 242
1952/*
1953 * Contains the user configured limits for the qgroup.
1954 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1955 */
1956#define BTRFS_QGROUP_LIMIT_KEY 244
1957/*
1958 * Records the child-parent relationship of qgroups. For
1959 * each relation, 2 keys are present:
1960 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1961 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1962 */
1963#define BTRFS_QGROUP_RELATION_KEY 246
1964
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02001965#define BTRFS_BALANCE_ITEM_KEY 248
1966
Chris Mason9f5fae22007-03-20 14:38:32 -04001967/*
Stefan Behrens733f4fb2012-05-25 16:06:10 +02001968 * Persistantly stores the io stats in the device tree.
1969 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1970 */
1971#define BTRFS_DEV_STATS_KEY 249
1972
1973/*
Stefan Behrensa2bff642012-11-05 17:32:20 +01001974 * Persistantly stores the device replace state in the device tree.
1975 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1976 */
1977#define BTRFS_DEV_REPLACE_KEY 250
1978
1979/*
Stefan Behrens07b30a42013-08-15 17:11:17 +02001980 * Stores items that allow to quickly map UUIDs to something else.
1981 * These items are part of the filesystem UUID tree.
1982 * The key is built like this:
1983 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1984 */
1985#if BTRFS_UUID_SIZE != 16
1986#error "UUID items require BTRFS_UUID_SIZE == 16!"
1987#endif
1988#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1989#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1990 * received subvols */
1991
1992/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001993 * string items are for debugging. They just store a short string of
1994 * data in the FS
1995 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001996#define BTRFS_STRING_ITEM_KEY 253
1997
David Sterba0942caa2011-06-28 15:10:37 +00001998/*
1999 * Flags for mount options.
2000 *
2001 * Note: don't forget to add new options to btrfs_show_options()
2002 */
Chris Mason21ad10c2008-01-09 09:23:21 -05002003#define BTRFS_MOUNT_NODATASUM (1 << 0)
2004#define BTRFS_MOUNT_NODATACOW (1 << 1)
2005#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05002006#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04002007#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04002008#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04002009#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04002010#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04002011#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04002012#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04002013#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05002014#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04002015#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04002016#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04002017#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05002018#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04002019#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04002020#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Chris Masonaf31f5e2011-11-03 15:17:42 -04002021#define BTRFS_MOUNT_RECOVERY (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02002022#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05002023#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2024#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04002025#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Stefan Behrensf420ee12013-08-15 17:11:24 +02002026#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
Qu Wenruo3818aea2014-01-13 13:36:06 +08002027#define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002028
David Sterba8b87dc12013-08-01 18:14:52 +02002029#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2030
Chris Masonb6cda9b2007-12-14 15:30:32 -05002031#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2032#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
Miao Xiedc81cdc2013-02-20 23:32:52 -07002033#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002034#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2035 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05002036/*
2037 * Inode flags
2038 */
Yanfdebe2b2008-01-14 13:26:08 -05002039#define BTRFS_INODE_NODATASUM (1 << 0)
2040#define BTRFS_INODE_NODATACOW (1 << 1)
2041#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04002042#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04002043#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002044#define BTRFS_INODE_SYNC (1 << 5)
2045#define BTRFS_INODE_IMMUTABLE (1 << 6)
2046#define BTRFS_INODE_APPEND (1 << 7)
2047#define BTRFS_INODE_NODUMP (1 << 8)
2048#define BTRFS_INODE_NOATIME (1 << 9)
2049#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00002050#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002051
Li Zefan08fe4db2011-03-28 02:01:25 +00002052#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2053
Chris Masoncfed81a2012-03-03 07:40:03 -05002054struct btrfs_map_token {
2055 struct extent_buffer *eb;
2056 char *kaddr;
2057 unsigned long offset;
2058};
2059
2060static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2061{
Josef Bacikad914552012-10-15 13:39:33 -04002062 token->kaddr = NULL;
Chris Masoncfed81a2012-03-03 07:40:03 -05002063}
2064
Chris Mason5f39d392007-10-15 16:14:19 -04002065/* some macros to generate set/get funcs for the struct fields. This
2066 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2067 * one for u8:
2068 */
2069#define le8_to_cpu(v) (v)
2070#define cpu_to_le8(v) (v)
2071#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04002072
Chris Mason5f39d392007-10-15 16:14:19 -04002073#define read_eb_member(eb, ptr, type, member, result) ( \
2074 read_extent_buffer(eb, (char *)(result), \
2075 ((unsigned long)(ptr)) + \
2076 offsetof(type, member), \
2077 sizeof(((type *)0)->member)))
2078
2079#define write_eb_member(eb, ptr, type, member, result) ( \
2080 write_extent_buffer(eb, (char *)(result), \
2081 ((unsigned long)(ptr)) + \
2082 offsetof(type, member), \
2083 sizeof(((type *)0)->member)))
2084
Li Zefan18077bb2012-07-09 20:22:35 -06002085#define DECLARE_BTRFS_SETGET_BITS(bits) \
2086u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2087 unsigned long off, \
2088 struct btrfs_map_token *token); \
2089void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2090 unsigned long off, u##bits val, \
2091 struct btrfs_map_token *token); \
2092static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2093 unsigned long off) \
2094{ \
2095 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2096} \
2097static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2098 unsigned long off, u##bits val) \
2099{ \
2100 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2101}
2102
2103DECLARE_BTRFS_SETGET_BITS(8)
2104DECLARE_BTRFS_SETGET_BITS(16)
2105DECLARE_BTRFS_SETGET_BITS(32)
2106DECLARE_BTRFS_SETGET_BITS(64)
2107
Chris Mason5f39d392007-10-15 16:14:19 -04002108#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Li Zefan18077bb2012-07-09 20:22:35 -06002109static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2110{ \
2111 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2112 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2113} \
2114static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2115 u##bits val) \
2116{ \
2117 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2118 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2119} \
2120static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2121 struct btrfs_map_token *token) \
2122{ \
2123 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2124 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2125} \
2126static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2127 type *s, u##bits val, \
2128 struct btrfs_map_token *token) \
2129{ \
2130 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2131 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2132}
Chris Mason9078a3e2007-04-26 16:46:15 -04002133
Chris Mason5f39d392007-10-15 16:14:19 -04002134#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2135static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2136{ \
Chris Mason727011e2010-08-06 13:21:20 -04002137 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002138 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04002139 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04002140} \
2141static inline void btrfs_set_##name(struct extent_buffer *eb, \
2142 u##bits val) \
2143{ \
Chris Mason727011e2010-08-06 13:21:20 -04002144 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002145 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04002146}
Chris Mason1e1d2702007-03-15 19:03:33 -04002147
Chris Mason5f39d392007-10-15 16:14:19 -04002148#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2149static inline u##bits btrfs_##name(type *s) \
2150{ \
2151 return le##bits##_to_cpu(s->member); \
2152} \
2153static inline void btrfs_set_##name(type *s, u##bits val) \
2154{ \
2155 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04002156}
2157
Chris Mason0b86a832008-03-24 15:01:56 -04002158BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2159BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2160BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2161BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2162BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05002163BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2164 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002165BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2166BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002167BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2168BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2169BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002170BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002171
Chris Mason8a4b83c2008-03-24 15:02:07 -04002172BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2173BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2174 total_bytes, 64);
2175BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2176 bytes_used, 64);
2177BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2178 io_align, 32);
2179BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2180 io_width, 32);
2181BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2182 sector_size, 32);
2183BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002184BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2185 dev_group, 32);
2186BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2187 seek_speed, 8);
2188BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2189 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002190BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2191 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002192
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002193static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
Chris Mason0b86a832008-03-24 15:01:56 -04002194{
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002195 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
Chris Mason0b86a832008-03-24 15:01:56 -04002196}
2197
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002198static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
Yan Zheng2b820322008-11-17 21:11:30 -05002199{
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002200 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
Yan Zheng2b820322008-11-17 21:11:30 -05002201}
2202
Chris Masone17cade2008-04-15 15:41:47 -04002203BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002204BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2205BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2206BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2207BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2208BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2209BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2210BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002211BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002212BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2213BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2214
Chris Masone17cade2008-04-15 15:41:47 -04002215static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2216{
2217 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2218}
2219
2220BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002221BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2222BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2223 stripe_len, 64);
2224BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2225 io_align, 32);
2226BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2227 io_width, 32);
2228BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2229 sector_size, 32);
2230BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2231BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2232 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002233BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2234 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002235BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2236BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2237
2238static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2239 int nr)
2240{
2241 unsigned long offset = (unsigned long)c;
2242 offset += offsetof(struct btrfs_chunk, stripe);
2243 offset += nr * sizeof(struct btrfs_stripe);
2244 return (struct btrfs_stripe *)offset;
2245}
2246
Chris Masona4437552008-04-18 10:29:38 -04002247static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2248{
2249 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2250}
2251
Chris Mason0b86a832008-03-24 15:01:56 -04002252static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2253 struct btrfs_chunk *c, int nr)
2254{
2255 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2256}
2257
Chris Mason0b86a832008-03-24 15:01:56 -04002258static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2259 struct btrfs_chunk *c, int nr)
2260{
2261 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2262}
2263
Chris Mason5f39d392007-10-15 16:14:19 -04002264/* struct btrfs_block_group_item */
2265BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2266 used, 64);
2267BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2268 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002269BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2270 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002271
2272BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04002273 struct btrfs_block_group_item, chunk_objectid, 64);
2274BTRFS_SETGET_FUNCS(disk_block_group_flags,
2275 struct btrfs_block_group_item, flags, 64);
2276BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2277 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002278
Chris Mason39544012007-12-12 14:38:19 -05002279/* struct btrfs_inode_ref */
2280BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04002281BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05002282
Mark Fashehf1863732012-08-08 11:32:27 -07002283/* struct btrfs_inode_extref */
2284BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2285 parent_objectid, 64);
2286BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2287 name_len, 16);
2288BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2289
Chris Mason5f39d392007-10-15 16:14:19 -04002290/* struct btrfs_inode_item */
2291BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002292BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002293BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002294BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04002295BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002296BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2297BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2298BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2299BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2300BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04002301BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002302BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002303BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2304 generation, 64);
2305BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2306 sequence, 64);
2307BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2308 transid, 64);
2309BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2310BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2311 nbytes, 64);
2312BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2313 block_group, 64);
2314BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2315BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2316BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2317BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2318BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2319BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002320
Chris Mason0b86a832008-03-24 15:01:56 -04002321static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002322btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002323{
Chris Mason5f39d392007-10-15 16:14:19 -04002324 unsigned long ptr = (unsigned long)inode_item;
2325 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04002326 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002327}
2328
Chris Mason0b86a832008-03-24 15:01:56 -04002329static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002330btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002331{
Chris Mason5f39d392007-10-15 16:14:19 -04002332 unsigned long ptr = (unsigned long)inode_item;
2333 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04002334 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002335}
2336
Chris Mason0b86a832008-03-24 15:01:56 -04002337static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04002338btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002339{
Chris Mason5f39d392007-10-15 16:14:19 -04002340 unsigned long ptr = (unsigned long)inode_item;
2341 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04002342 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002343}
2344
Chris Mason0b86a832008-03-24 15:01:56 -04002345BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2346BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002347BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2348BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002349
Chris Mason0b86a832008-03-24 15:01:56 -04002350/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04002351BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2352 chunk_tree, 64);
2353BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2354 chunk_objectid, 64);
2355BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2356 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002357BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2358
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002359static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
Chris Masone17cade2008-04-15 15:41:47 -04002360{
2361 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002362 return (unsigned long)dev + ptr;
Chris Masone17cade2008-04-15 15:41:47 -04002363}
2364
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002365BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2366BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2367 generation, 64);
2368BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002369
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002370BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002371
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002372
2373BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2374
2375static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2376 struct btrfs_tree_block_info *item,
2377 struct btrfs_disk_key *key)
2378{
2379 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2380}
2381
2382static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2383 struct btrfs_tree_block_info *item,
2384 struct btrfs_disk_key *key)
2385{
2386 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2387}
2388
2389BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2390 root, 64);
2391BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2392 objectid, 64);
2393BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2394 offset, 64);
2395BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2396 count, 32);
2397
2398BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2399 count, 32);
2400
2401BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2402 type, 8);
2403BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2404 offset, 64);
2405
2406static inline u32 btrfs_extent_inline_ref_size(int type)
2407{
2408 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2409 type == BTRFS_SHARED_BLOCK_REF_KEY)
2410 return sizeof(struct btrfs_extent_inline_ref);
2411 if (type == BTRFS_SHARED_DATA_REF_KEY)
2412 return sizeof(struct btrfs_shared_data_ref) +
2413 sizeof(struct btrfs_extent_inline_ref);
2414 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2415 return sizeof(struct btrfs_extent_data_ref) +
2416 offsetof(struct btrfs_extent_inline_ref, offset);
2417 BUG();
2418 return 0;
2419}
2420
2421BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2422BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2423 generation, 64);
2424BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2425BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002426
2427/* struct btrfs_node */
2428BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002429BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002430BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2431 blockptr, 64);
2432BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2433 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002434
2435static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002436{
Chris Mason5f39d392007-10-15 16:14:19 -04002437 unsigned long ptr;
2438 ptr = offsetof(struct btrfs_node, ptrs) +
2439 sizeof(struct btrfs_key_ptr) * nr;
2440 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002441}
2442
Chris Mason5f39d392007-10-15 16:14:19 -04002443static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2444 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04002445{
Chris Mason5f39d392007-10-15 16:14:19 -04002446 unsigned long ptr;
2447 ptr = offsetof(struct btrfs_node, ptrs) +
2448 sizeof(struct btrfs_key_ptr) * nr;
2449 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04002450}
2451
Chris Mason74493f72007-12-11 09:25:06 -05002452static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2453{
2454 unsigned long ptr;
2455 ptr = offsetof(struct btrfs_node, ptrs) +
2456 sizeof(struct btrfs_key_ptr) * nr;
2457 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2458}
2459
2460static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2461 int nr, u64 val)
2462{
2463 unsigned long ptr;
2464 ptr = offsetof(struct btrfs_node, ptrs) +
2465 sizeof(struct btrfs_key_ptr) * nr;
2466 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2467}
2468
Chris Mason810191f2007-10-15 16:18:55 -04002469static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04002470{
Chris Mason5f39d392007-10-15 16:14:19 -04002471 return offsetof(struct btrfs_node, ptrs) +
2472 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04002473}
2474
Chris Masone644d022007-11-06 15:09:29 -05002475void btrfs_node_key(struct extent_buffer *eb,
2476 struct btrfs_disk_key *disk_key, int nr);
2477
Chris Mason5f39d392007-10-15 16:14:19 -04002478static inline void btrfs_set_node_key(struct extent_buffer *eb,
2479 struct btrfs_disk_key *disk_key, int nr)
2480{
2481 unsigned long ptr;
2482 ptr = btrfs_node_key_ptr_offset(nr);
2483 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2484 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002485}
2486
Chris Mason5f39d392007-10-15 16:14:19 -04002487/* struct btrfs_item */
2488BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2489BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002490BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2491BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002492
2493static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002494{
Chris Mason5f39d392007-10-15 16:14:19 -04002495 return offsetof(struct btrfs_leaf, items) +
2496 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002497}
2498
Ross Kirkdd3cc162013-09-16 15:58:09 +01002499static inline struct btrfs_item *btrfs_item_nr(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002500{
Chris Mason5f39d392007-10-15 16:14:19 -04002501 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002502}
2503
Chris Mason5f39d392007-10-15 16:14:19 -04002504static inline u32 btrfs_item_end(struct extent_buffer *eb,
2505 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002506{
Chris Mason5f39d392007-10-15 16:14:19 -04002507 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04002508}
2509
Chris Mason5f39d392007-10-15 16:14:19 -04002510static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002511{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002512 return btrfs_item_end(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002513}
2514
Chris Mason5f39d392007-10-15 16:14:19 -04002515static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002516{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002517 return btrfs_item_offset(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002518}
2519
Chris Mason5f39d392007-10-15 16:14:19 -04002520static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002521{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002522 return btrfs_item_size(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002523}
2524
Chris Mason5f39d392007-10-15 16:14:19 -04002525static inline void btrfs_item_key(struct extent_buffer *eb,
2526 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002527{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002528 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002529 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002530}
2531
Chris Mason5f39d392007-10-15 16:14:19 -04002532static inline void btrfs_set_item_key(struct extent_buffer *eb,
2533 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002534{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002535 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002536 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002537}
2538
Chris Masone02119d2008-09-05 16:13:11 -04002539BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2540
Chris Mason0660b5a2008-11-17 20:37:39 -05002541/*
2542 * struct btrfs_root_ref
2543 */
2544BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2545BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2546BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2547
Chris Mason5f39d392007-10-15 16:14:19 -04002548/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05002549BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04002550BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2551BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04002552BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002553BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2554BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2555 data_len, 16);
2556BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2557 name_len, 16);
2558BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2559 transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002560
2561static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2562 struct btrfs_dir_item *item,
2563 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002564{
Chris Mason5f39d392007-10-15 16:14:19 -04002565 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002566}
2567
Chris Mason5f39d392007-10-15 16:14:19 -04002568static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2569 struct btrfs_dir_item *item,
2570 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002571{
Chris Mason5f39d392007-10-15 16:14:19 -04002572 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002573}
2574
Josef Bacik0af3d002010-06-21 14:48:16 -04002575BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2576 num_entries, 64);
2577BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2578 num_bitmaps, 64);
2579BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2580 generation, 64);
2581
2582static inline void btrfs_free_space_key(struct extent_buffer *eb,
2583 struct btrfs_free_space_header *h,
2584 struct btrfs_disk_key *key)
2585{
2586 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2587}
2588
2589static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2590 struct btrfs_free_space_header *h,
2591 struct btrfs_disk_key *key)
2592{
2593 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2594}
2595
Chris Mason5f39d392007-10-15 16:14:19 -04002596/* struct btrfs_disk_key */
2597BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2598 objectid, 64);
2599BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2600BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04002601
Chris Masone2fa7222007-03-12 16:22:34 -04002602static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2603 struct btrfs_disk_key *disk)
2604{
2605 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002606 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002607 cpu->objectid = le64_to_cpu(disk->objectid);
2608}
2609
2610static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2611 struct btrfs_key *cpu)
2612{
2613 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002614 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002615 disk->objectid = cpu_to_le64(cpu->objectid);
2616}
2617
Chris Mason5f39d392007-10-15 16:14:19 -04002618static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2619 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002620{
Chris Mason5f39d392007-10-15 16:14:19 -04002621 struct btrfs_disk_key disk_key;
2622 btrfs_node_key(eb, &disk_key, nr);
2623 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002624}
2625
Chris Mason5f39d392007-10-15 16:14:19 -04002626static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2627 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002628{
Chris Mason5f39d392007-10-15 16:14:19 -04002629 struct btrfs_disk_key disk_key;
2630 btrfs_item_key(eb, &disk_key, nr);
2631 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002632}
2633
Chris Mason5f39d392007-10-15 16:14:19 -04002634static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2635 struct btrfs_dir_item *item,
2636 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002637{
Chris Mason5f39d392007-10-15 16:14:19 -04002638 struct btrfs_disk_key disk_key;
2639 btrfs_dir_item_key(eb, item, &disk_key);
2640 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002641}
2642
Chris Mason5f39d392007-10-15 16:14:19 -04002643
2644static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002645{
Chris Mason5f39d392007-10-15 16:14:19 -04002646 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002647}
2648
Chris Mason5f39d392007-10-15 16:14:19 -04002649static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002650{
Chris Mason5f39d392007-10-15 16:14:19 -04002651 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002652}
2653
Chris Mason5f39d392007-10-15 16:14:19 -04002654/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002655BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002656BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2657 generation, 64);
2658BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2659BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002660BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002661BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002662BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2663 generation, 64);
2664BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2665BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2666 nritems, 32);
2667BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002668
Chris Mason63b10fc2008-04-01 11:21:32 -04002669static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2670{
2671 return (btrfs_header_flags(eb) & flag) == flag;
2672}
2673
2674static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2675{
2676 u64 flags = btrfs_header_flags(eb);
2677 btrfs_set_header_flags(eb, flags | flag);
2678 return (flags & flag) == flag;
2679}
2680
2681static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2682{
2683 u64 flags = btrfs_header_flags(eb);
2684 btrfs_set_header_flags(eb, flags & ~flag);
2685 return (flags & flag) == flag;
2686}
2687
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002688static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2689{
2690 u64 flags = btrfs_header_flags(eb);
2691 return flags >> BTRFS_BACKREF_REV_SHIFT;
2692}
2693
2694static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2695 int rev)
2696{
2697 u64 flags = btrfs_header_flags(eb);
2698 flags &= ~BTRFS_BACKREF_REV_MASK;
2699 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2700 btrfs_set_header_flags(eb, flags);
2701}
2702
Ross Kirk0a4e5582013-09-24 10:12:38 +01002703static inline unsigned long btrfs_header_fsid(void)
Chris Masone2fa7222007-03-12 16:22:34 -04002704{
Geert Uytterhoevenfba6aa72013-08-20 13:20:14 +02002705 return offsetof(struct btrfs_header, fsid);
Chris Masone2fa7222007-03-12 16:22:34 -04002706}
2707
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002708static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
Chris Masone17cade2008-04-15 15:41:47 -04002709{
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002710 return offsetof(struct btrfs_header, chunk_tree_uuid);
Chris Masone17cade2008-04-15 15:41:47 -04002711}
2712
Chris Mason5f39d392007-10-15 16:14:19 -04002713static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002714{
Chris Masond3977122009-01-05 21:25:51 -05002715 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002716}
2717
Chris Mason5f39d392007-10-15 16:14:19 -04002718/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002719BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2720 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002721BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002722BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2723BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002724
Yan Zheng84234f32008-10-29 14:49:05 -04002725BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2726 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002727BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2728BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002729BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2730BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002731BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002732BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2733BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002734BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2735 last_snapshot, 64);
Alexander Block8ea05e32012-07-25 17:35:53 +02002736BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2737 generation_v2, 64);
2738BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2739 ctransid, 64);
2740BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2741 otransid, 64);
2742BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2743 stransid, 64);
2744BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2745 rtransid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002746
Li Zefanb83cc962010-12-20 16:04:08 +08002747static inline bool btrfs_root_readonly(struct btrfs_root *root)
2748{
Al Viro6ed3cf22012-04-13 11:49:04 -04002749 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002750}
2751
Chris Masonaf31f5e2011-11-03 15:17:42 -04002752/* struct btrfs_root_backup */
2753BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2754 tree_root, 64);
2755BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2756 tree_root_gen, 64);
2757BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2758 tree_root_level, 8);
2759
2760BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2761 chunk_root, 64);
2762BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2763 chunk_root_gen, 64);
2764BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2765 chunk_root_level, 8);
2766
2767BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2768 extent_root, 64);
2769BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2770 extent_root_gen, 64);
2771BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2772 extent_root_level, 8);
2773
2774BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2775 fs_root, 64);
2776BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2777 fs_root_gen, 64);
2778BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2779 fs_root_level, 8);
2780
2781BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2782 dev_root, 64);
2783BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2784 dev_root_gen, 64);
2785BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2786 dev_root_level, 8);
2787
2788BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2789 csum_root, 64);
2790BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2791 csum_root_gen, 64);
2792BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2793 csum_root_level, 8);
2794BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2795 total_bytes, 64);
2796BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2797 bytes_used, 64);
2798BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2799 num_devices, 64);
2800
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002801/* struct btrfs_balance_item */
2802BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002803
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002804static inline void btrfs_balance_data(struct extent_buffer *eb,
2805 struct btrfs_balance_item *bi,
2806 struct btrfs_disk_balance_args *ba)
2807{
2808 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2809}
2810
2811static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2812 struct btrfs_balance_item *bi,
2813 struct btrfs_disk_balance_args *ba)
2814{
2815 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2816}
2817
2818static inline void btrfs_balance_meta(struct extent_buffer *eb,
2819 struct btrfs_balance_item *bi,
2820 struct btrfs_disk_balance_args *ba)
2821{
2822 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2823}
2824
2825static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2826 struct btrfs_balance_item *bi,
2827 struct btrfs_disk_balance_args *ba)
2828{
2829 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2830}
2831
2832static inline void btrfs_balance_sys(struct extent_buffer *eb,
2833 struct btrfs_balance_item *bi,
2834 struct btrfs_disk_balance_args *ba)
2835{
2836 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2837}
2838
2839static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2840 struct btrfs_balance_item *bi,
2841 struct btrfs_disk_balance_args *ba)
2842{
2843 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2844}
2845
2846static inline void
2847btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2848 struct btrfs_disk_balance_args *disk)
2849{
2850 memset(cpu, 0, sizeof(*cpu));
2851
2852 cpu->profiles = le64_to_cpu(disk->profiles);
2853 cpu->usage = le64_to_cpu(disk->usage);
2854 cpu->devid = le64_to_cpu(disk->devid);
2855 cpu->pstart = le64_to_cpu(disk->pstart);
2856 cpu->pend = le64_to_cpu(disk->pend);
2857 cpu->vstart = le64_to_cpu(disk->vstart);
2858 cpu->vend = le64_to_cpu(disk->vend);
2859 cpu->target = le64_to_cpu(disk->target);
2860 cpu->flags = le64_to_cpu(disk->flags);
2861}
2862
2863static inline void
2864btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2865 struct btrfs_balance_args *cpu)
2866{
2867 memset(disk, 0, sizeof(*disk));
2868
2869 disk->profiles = cpu_to_le64(cpu->profiles);
2870 disk->usage = cpu_to_le64(cpu->usage);
2871 disk->devid = cpu_to_le64(cpu->devid);
2872 disk->pstart = cpu_to_le64(cpu->pstart);
2873 disk->pend = cpu_to_le64(cpu->pend);
2874 disk->vstart = cpu_to_le64(cpu->vstart);
2875 disk->vend = cpu_to_le64(cpu->vend);
2876 disk->target = cpu_to_le64(cpu->target);
2877 disk->flags = cpu_to_le64(cpu->flags);
2878}
2879
2880/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04002881BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04002882BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002883BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2884 generation, 64);
2885BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002886BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2887 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04002888BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2889 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002890BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2891 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04002892BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2893 chunk_root, 64);
2894BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04002895 chunk_root_level, 8);
2896BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2897 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002898BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2899 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002900BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2901 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04002902BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2903 total_bytes, 64);
2904BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2905 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002906BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2907 sectorsize, 32);
2908BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2909 nodesize, 32);
2910BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2911 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05002912BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2913 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002914BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2915 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002916BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2917 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002918BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2919 compat_flags, 64);
2920BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00002921 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002922BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2923 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002924BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2925 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04002926BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2927 cache_generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002928BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
Stefan Behrens26432792013-08-15 17:11:22 +02002929BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2930 uuid_tree_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002931
2932static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2933{
David Sterba1104a882013-03-06 15:57:46 +01002934 u16 t = btrfs_super_csum_type(s);
2935 /*
2936 * csum type is validated at mount time
2937 */
Josef Bacik607d4322008-12-02 07:17:45 -05002938 return btrfs_csum_sizes[t];
2939}
Chris Mason5f39d392007-10-15 16:14:19 -04002940
2941static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04002942{
Chris Mason5f39d392007-10-15 16:14:19 -04002943 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04002944}
2945
Chris Mason5f39d392007-10-15 16:14:19 -04002946/* struct btrfs_file_extent_item */
2947BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002948BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2949 struct btrfs_file_extent_item, disk_bytenr, 64);
2950BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2951 struct btrfs_file_extent_item, offset, 64);
2952BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2953 struct btrfs_file_extent_item, generation, 64);
2954BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2955 struct btrfs_file_extent_item, num_bytes, 64);
Josef Bacike20d6c52013-11-13 21:11:49 -05002956BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2957 struct btrfs_file_extent_item, disk_num_bytes, 64);
2958BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2959 struct btrfs_file_extent_item, compression, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04002960
Chris Masond3977122009-01-05 21:25:51 -05002961static inline unsigned long
2962btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454d2007-04-19 13:37:44 -04002963{
Chris Mason5f39d392007-10-15 16:14:19 -04002964 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04002965 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04002966 return offset;
Chris Mason236454d2007-04-19 13:37:44 -04002967}
2968
2969static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2970{
Chris Masondb945352007-10-15 16:15:53 -04002971 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454d2007-04-19 13:37:44 -04002972}
2973
Chris Masondb945352007-10-15 16:15:53 -04002974BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2975 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002976BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2977 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002978BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2979 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002980BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2981 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04002982BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2983 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04002984BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2985 ram_bytes, 64);
2986BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2987 compression, 8);
2988BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2989 encryption, 8);
2990BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2991 other_encoding, 16);
2992
Chris Masonc8b97812008-10-29 14:49:59 -04002993/*
2994 * this returns the number of bytes used by the item on disk, minus the
2995 * size of any extent headers. If a file is compressed on disk, this is
2996 * the compressed size
2997 */
2998static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2999 struct btrfs_item *e)
3000{
3001 unsigned long offset;
3002 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3003 return btrfs_item_size(eb, e) - offset;
3004}
Chris Mason9f5fae22007-03-20 14:38:32 -04003005
Chris Mason514ac8a2014-01-03 21:07:00 -08003006/* this returns the number of file bytes represented by the inline item.
3007 * If an item is compressed, this is the uncompressed size
3008 */
3009static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3010 int slot,
3011 struct btrfs_file_extent_item *fi)
3012{
3013 struct btrfs_map_token token;
3014
3015 btrfs_init_map_token(&token);
3016 /*
3017 * return the space used on disk if this item isn't
3018 * compressed or encoded
3019 */
3020 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3021 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3022 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3023 return btrfs_file_extent_inline_item_len(eb,
3024 btrfs_item_nr(slot));
3025 }
3026
3027 /* otherwise use the ram bytes field */
3028 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3029}
3030
3031
Stefan Behrens733f4fb2012-05-25 16:06:10 +02003032/* btrfs_dev_stats_item */
3033static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3034 struct btrfs_dev_stats_item *ptr,
3035 int index)
3036{
3037 u64 val;
3038
3039 read_extent_buffer(eb, &val,
3040 offsetof(struct btrfs_dev_stats_item, values) +
3041 ((unsigned long)ptr) + (index * sizeof(u64)),
3042 sizeof(val));
3043 return val;
3044}
3045
3046static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3047 struct btrfs_dev_stats_item *ptr,
3048 int index, u64 val)
3049{
3050 write_extent_buffer(eb, &val,
3051 offsetof(struct btrfs_dev_stats_item, values) +
3052 ((unsigned long)ptr) + (index * sizeof(u64)),
3053 sizeof(val));
3054}
3055
Arne Jansen630dc772011-09-13 11:06:07 +02003056/* btrfs_qgroup_status_item */
3057BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3058 generation, 64);
3059BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3060 version, 64);
3061BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3062 flags, 64);
Jan Schmidt2f232032013-04-25 16:04:51 +00003063BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3064 rescan, 64);
Arne Jansen630dc772011-09-13 11:06:07 +02003065
3066/* btrfs_qgroup_info_item */
3067BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3068 generation, 64);
3069BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3070BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3071 rfer_cmpr, 64);
3072BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3073BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3074 excl_cmpr, 64);
3075
3076BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3077 struct btrfs_qgroup_info_item, generation, 64);
3078BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3079 rfer, 64);
3080BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3081 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3082BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3083 excl, 64);
3084BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3085 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3086
3087/* btrfs_qgroup_limit_item */
3088BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3089 flags, 64);
3090BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3091 max_rfer, 64);
3092BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3093 max_excl, 64);
3094BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3095 rsv_rfer, 64);
3096BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3097 rsv_excl, 64);
3098
Stefan Behrensa2bff642012-11-05 17:32:20 +01003099/* btrfs_dev_replace_item */
3100BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3101 struct btrfs_dev_replace_item, src_devid, 64);
3102BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3103 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3104 64);
3105BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3106 replace_state, 64);
3107BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3108 time_started, 64);
3109BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3110 time_stopped, 64);
3111BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3112 num_write_errors, 64);
3113BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3114 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3115 64);
3116BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3117 cursor_left, 64);
3118BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3119 cursor_right, 64);
3120
3121BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3122 struct btrfs_dev_replace_item, src_devid, 64);
3123BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3124 struct btrfs_dev_replace_item,
3125 cont_reading_from_srcdev_mode, 64);
3126BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3127 struct btrfs_dev_replace_item, replace_state, 64);
3128BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3129 struct btrfs_dev_replace_item, time_started, 64);
3130BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3131 struct btrfs_dev_replace_item, time_stopped, 64);
3132BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3133 struct btrfs_dev_replace_item, num_write_errors, 64);
3134BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3135 struct btrfs_dev_replace_item,
3136 num_uncorrectable_read_errors, 64);
3137BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3138 struct btrfs_dev_replace_item, cursor_left, 64);
3139BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3140 struct btrfs_dev_replace_item, cursor_right, 64);
3141
Al Viro815745c2011-11-17 15:40:49 -05003142static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
Chris Masone20d96d2007-03-22 12:13:20 -04003143{
3144 return sb->s_fs_info;
3145}
3146
Chris Masond3977122009-01-05 21:25:51 -05003147static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3148{
Chris Masondb945352007-10-15 16:15:53 -04003149 if (level == 0)
3150 return root->leafsize;
3151 return root->nodesize;
3152}
3153
Chris Mason4beb1b82007-03-14 10:31:29 -04003154/* helper function to cast into the data area of the leaf. */
3155#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04003156 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04003157 btrfs_item_offset_nr(leaf, slot)))
3158
3159#define btrfs_item_ptr_offset(leaf, slot) \
3160 ((unsigned long)(btrfs_leaf_data(leaf) + \
3161 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04003162
Josef Bacik67377732010-09-16 16:19:09 -04003163static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3164{
3165 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3166 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3167}
3168
Josef Bacik3b16a4e2011-09-21 15:05:58 -04003169static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3170{
3171 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3172}
3173
Chris Masonb18c6682007-04-17 13:26:50 -04003174/* extent-tree.c */
Miao Xie16cdcec2011-04-22 18:12:22 +08003175static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
Josef Bacik9e0baf62011-07-15 15:16:44 +00003176 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08003177{
3178 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
Josef Bacikc4fbb432013-09-17 10:50:06 -04003179 2 * num_items;
Miao Xie16cdcec2011-04-22 18:12:22 +08003180}
3181
Josef Bacik07127182011-08-19 10:29:59 -04003182/*
3183 * Doing a truncate won't result in new nodes or leaves, just what we need for
3184 * COW.
3185 */
3186static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3187 unsigned num_items)
3188{
3189 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3190 num_items;
3191}
3192
Josef Bacik1be41b72013-06-12 13:56:06 -04003193int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3194 struct btrfs_root *root);
Josef Bacik0a2b2a82014-01-23 10:54:11 -05003195int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3196 struct btrfs_root *root);
Chris Masonfa9c0d792009-04-03 09:47:43 -04003197void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04003198int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3199 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04003200int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003201int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, u64 bytenr,
Josef Bacik3173a182013-03-07 14:22:04 -05003203 u64 offset, int metadata, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04003204int btrfs_pin_extent(struct btrfs_root *root,
3205 u64 bytenr, u64 num, int reserved);
Liu Bodcfac412012-12-27 09:01:20 +00003206int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
Chris Masone688b7252011-10-31 20:52:39 -04003207 u64 bytenr, u64 num_bytes);
Josef Bacik8c2a1a32013-06-06 13:19:32 -04003208int btrfs_exclude_logged_extents(struct btrfs_root *root,
3209 struct extent_buffer *eb);
Yan Zheng80ff3852008-10-30 14:20:02 -04003210int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003211 struct btrfs_root *root,
3212 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05003213struct btrfs_block_group_cache *btrfs_lookup_block_group(
3214 struct btrfs_fs_info *info,
3215 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003216void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04003217int get_block_group_index(struct btrfs_block_group_cache *cache);
Chris Mason5f39d392007-10-15 16:14:19 -04003218struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003219 struct btrfs_root *root, u32 blocksize,
3220 u64 parent, u64 root_objectid,
3221 struct btrfs_disk_key *key, int level,
Jan Schmidt5581a512012-05-16 17:04:52 +02003222 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003223void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3224 struct btrfs_root *root,
3225 struct extent_buffer *buf,
Jan Schmidt5581a512012-05-16 17:04:52 +02003226 u64 parent, int last_ref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003227int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3228 struct btrfs_root *root,
3229 u64 root_objectid, u64 owner,
3230 u64 offset, struct btrfs_key *ins);
3231int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3232 struct btrfs_root *root,
3233 u64 root_objectid, u64 owner, u64 offset,
3234 struct btrfs_key *ins);
Josef Bacik00361582013-08-14 14:02:47 -04003235int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3236 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3237 struct btrfs_key *ins, int is_data);
Chris Masone089f052007-03-16 16:20:31 -04003238int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003239 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003240int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003241 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003242int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3243 struct btrfs_root *root,
3244 u64 bytenr, u64 num_bytes, u64 flags,
Josef Bacikb1c79e02013-05-09 13:49:30 -04003245 int level, int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04003246int btrfs_free_extent(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003248 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3249 u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003250
Chris Mason65b51a02008-08-01 15:11:20 -04003251int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Chris Masone688b7252011-10-31 20:52:39 -04003252int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3253 u64 start, u64 len);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003254void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3255 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04003256int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04003257 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04003258int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04003259 struct btrfs_root *root,
3260 u64 bytenr, u64 num_bytes, u64 parent,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003261 u64 root_objectid, u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003262
Chris Mason9078a3e2007-04-26 16:46:15 -04003263int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3264 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003265int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04003266int btrfs_free_block_groups(struct btrfs_fs_info *info);
3267int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04003268int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04003269int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3270 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04003271 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04003272 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04003273int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3274 struct btrfs_root *root, u64 group_start);
Josef Bacikea658ba2012-09-11 16:57:25 -04003275void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3276 struct btrfs_root *root);
Miao Xie6d07bce2011-01-05 10:07:31 +00003277u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Chris Mason4184ea72009-03-10 12:39:20 -04003278void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Miao Xie08e007d2012-10-16 11:33:38 +00003279
3280enum btrfs_reserve_flush_enum {
3281 /* If we are in the transaction, we can't flush anything.*/
3282 BTRFS_RESERVE_NO_FLUSH,
3283 /*
3284 * Flushing delalloc may cause deadlock somewhere, in this
3285 * case, use FLUSH LIMIT
3286 */
3287 BTRFS_RESERVE_FLUSH_LIMIT,
3288 BTRFS_RESERVE_FLUSH_ALL,
3289};
3290
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04003291int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3292void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003293void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3294 struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003295int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3296 struct inode *inode);
3297void btrfs_orphan_release_metadata(struct inode *inode);
Miao Xied5c12072013-02-28 10:04:33 +00003298int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3299 struct btrfs_block_rsv *rsv,
3300 int nitems,
Jeff Mahoneyee3441b2013-07-09 16:37:21 -04003301 u64 *qgroup_reserved, bool use_global_rsv);
Miao Xied5c12072013-02-28 10:04:33 +00003302void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3303 struct btrfs_block_rsv *rsv,
3304 u64 qgroup_reserved);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04003305int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3306void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3307int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3308void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Miao Xie66d8f3d2012-09-06 04:02:28 -06003309void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3310struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3311 unsigned short type);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003312void btrfs_free_block_rsv(struct btrfs_root *root,
3313 struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003314int btrfs_block_rsv_add(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003315 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3316 enum btrfs_reserve_flush_enum flush);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003317int btrfs_block_rsv_check(struct btrfs_root *root,
Josef Bacik36ba0222011-10-18 12:15:48 -04003318 struct btrfs_block_rsv *block_rsv, int min_factor);
3319int btrfs_block_rsv_refill(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003320 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3321 enum btrfs_reserve_flush_enum flush);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003322int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3323 struct btrfs_block_rsv *dst_rsv,
3324 u64 num_bytes);
Josef Bacikd52be812013-05-29 14:54:47 -04003325int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3326 struct btrfs_block_rsv *dest, u64 num_bytes,
3327 int min_factor);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003328void btrfs_block_rsv_release(struct btrfs_root *root,
3329 struct btrfs_block_rsv *block_rsv,
3330 u64 num_bytes);
3331int btrfs_set_block_group_ro(struct btrfs_root *root,
3332 struct btrfs_block_group_cache *cache);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003333void btrfs_set_block_group_rw(struct btrfs_root *root,
3334 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04003335void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00003336u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08003337int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3338 u64 start, u64 end);
3339int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
Li Dongyang5378e602011-03-24 10:24:27 +00003340 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05003341int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3342 struct btrfs_root *root, u64 type);
Li Dongyangf7039b12011-03-24 10:24:28 +00003343int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08003344
liuboc59021f2011-03-07 02:13:14 +00003345int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02003346int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3347 struct btrfs_fs_info *fs_info);
Liu Bo31e50222012-11-21 14:18:10 +00003348int __get_raid_index(u64 flags);
Chris Masondee26a92007-03-26 16:00:06 -04003349/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003350int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3351 int level, int *slot);
3352int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04003353int btrfs_previous_item(struct btrfs_root *root,
3354 struct btrfs_path *path, u64 min_objectid,
3355 int type);
Wang Shilongade2e0b2014-01-12 21:38:33 +08003356int btrfs_previous_extent_item(struct btrfs_root *root,
3357 struct btrfs_path *path, u64 min_objectid);
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003358void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003359 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04003360struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3361struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04003362int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003363 struct btrfs_key *key, int lowest_level,
Eric Sandeende78b512013-01-31 18:21:12 +00003364 u64 min_trans);
Chris Mason3f157a22008-06-25 16:01:31 -04003365int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Eric Sandeende78b512013-01-31 18:21:12 +00003366 struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003367 u64 min_trans);
Alexander Block70698302012-06-05 21:07:48 +02003368enum btrfs_compare_tree_result {
3369 BTRFS_COMPARE_TREE_NEW,
3370 BTRFS_COMPARE_TREE_DELETED,
3371 BTRFS_COMPARE_TREE_CHANGED,
Josef Bacikba5e8f22013-08-16 16:52:55 -04003372 BTRFS_COMPARE_TREE_SAME,
Alexander Block70698302012-06-05 21:07:48 +02003373};
3374typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3375 struct btrfs_root *right_root,
3376 struct btrfs_path *left_path,
3377 struct btrfs_path *right_path,
3378 struct btrfs_key *key,
3379 enum btrfs_compare_tree_result result,
3380 void *ctx);
3381int btrfs_compare_trees(struct btrfs_root *left_root,
3382 struct btrfs_root *right_root,
3383 btrfs_changed_cb_t cb, void *ctx);
Chris Mason5f39d392007-10-15 16:14:19 -04003384int btrfs_cow_block(struct btrfs_trans_handle *trans,
3385 struct btrfs_root *root, struct extent_buffer *buf,
3386 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04003387 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05003388int btrfs_copy_root(struct btrfs_trans_handle *trans,
3389 struct btrfs_root *root,
3390 struct extent_buffer *buf,
3391 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003392int btrfs_block_can_be_shared(struct btrfs_root *root,
3393 struct extent_buffer *buf);
Tsutomu Itoh4b90c682013-04-16 05:18:49 +00003394void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003395 u32 data_size);
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003396void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003397 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05003398int btrfs_split_item(struct btrfs_trans_handle *trans,
3399 struct btrfs_root *root,
3400 struct btrfs_path *path,
3401 struct btrfs_key *new_key,
3402 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00003403int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3404 struct btrfs_root *root,
3405 struct btrfs_path *path,
3406 struct btrfs_key *new_key);
Kelley Nielsene33d5c32013-11-04 19:33:33 -08003407int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3408 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
Chris Masone089f052007-03-16 16:20:31 -04003409int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3410 *root, struct btrfs_key *key, struct btrfs_path *p, int
3411 ins_len, int cow);
Jan Schmidt5d9e75c42012-05-16 18:25:47 +02003412int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3413 struct btrfs_path *p, u64 time_seq);
Arne Jansen2f38b3e2011-09-13 11:18:10 +02003414int btrfs_search_slot_for_read(struct btrfs_root *root,
3415 struct btrfs_key *key, struct btrfs_path *p,
3416 int find_higher, int return_any);
Chris Mason6702ed42007-08-07 16:15:09 -04003417int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04003418 struct btrfs_root *root, struct extent_buffer *parent,
Eric Sandeende78b512013-01-31 18:21:12 +00003419 int start_slot, u64 *last_ret,
Chris Masona6b6e752007-10-15 16:22:39 -04003420 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02003421void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04003422struct btrfs_path *btrfs_alloc_path(void);
3423void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003424void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08003425void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04003426 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003427void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3428
Chris Mason85e21ba2008-01-29 15:11:36 -05003429int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3430 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05003431static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3432 struct btrfs_root *root,
3433 struct btrfs_path *path)
3434{
3435 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3436}
3437
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003438void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003439 struct btrfs_key *cpu_key, u32 *data_size,
3440 u32 total_data, u32 total_size, int nr);
Chris Masone089f052007-03-16 16:20:31 -04003441int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3442 *root, struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05003443int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3444 struct btrfs_root *root,
3445 struct btrfs_path *path,
3446 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3447
3448static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3449 struct btrfs_root *root,
3450 struct btrfs_path *path,
3451 struct btrfs_key *key,
3452 u32 data_size)
3453{
3454 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3455}
3456
Chris Mason234b63a2007-03-13 10:46:10 -04003457int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Josef Bacik16e75492013-10-22 12:18:51 -04003458int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidt3d7806e2012-06-11 08:29:29 +02003459int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3460 u64 time_seq);
Alexander Block1c8f52a2012-06-19 07:42:25 -06003461static inline int btrfs_next_old_item(struct btrfs_root *root,
3462 struct btrfs_path *p, u64 time_seq)
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003463{
3464 ++p->slots[0];
3465 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
Alexander Block1c8f52a2012-06-19 07:42:25 -06003466 return btrfs_next_old_leaf(root, p, time_seq);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003467 return 0;
3468}
Alexander Block1c8f52a2012-06-19 07:42:25 -06003469static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3470{
3471 return btrfs_next_old_item(root, p, 0);
3472}
Chris Mason5f39d392007-10-15 16:14:19 -04003473int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04003474int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3475 struct btrfs_block_rsv *block_rsv,
3476 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04003477int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3478 struct btrfs_root *root,
3479 struct extent_buffer *node,
3480 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02003481static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3482{
3483 /*
3484 * Get synced with close_ctree()
3485 */
3486 smp_mb();
3487 return fs_info->closing;
3488}
Miao Xiebabbf1702013-05-14 10:20:43 +00003489
3490/*
3491 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3492 * anything except sleeping. This function is used to check the status of
3493 * the fs.
3494 */
3495static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3496{
3497 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3498 btrfs_fs_closing(root->fs_info));
3499}
3500
David Sterba6c417612011-04-13 15:41:04 +02003501static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3502{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02003503 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02003504 kfree(fs_info->delayed_root);
3505 kfree(fs_info->extent_root);
3506 kfree(fs_info->tree_root);
3507 kfree(fs_info->chunk_root);
3508 kfree(fs_info->dev_root);
3509 kfree(fs_info->csum_root);
Arne Jansenbcef60f2011-09-13 15:23:30 +02003510 kfree(fs_info->quota_root);
Filipe David Borba Mananad8f98032013-08-24 19:51:06 +01003511 kfree(fs_info->uuid_root);
David Sterba6c417612011-04-13 15:41:04 +02003512 kfree(fs_info->super_copy);
3513 kfree(fs_info->super_for_commit);
3514 kfree(fs_info);
3515}
David Sterba7841cb22011-05-31 18:07:27 +02003516
Jan Schmidt097b8a72012-06-21 11:08:04 +02003517/* tree mod log functions from ctree.c */
3518u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3519 struct seq_list *elem);
3520void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3521 struct seq_list *elem);
Jan Schmidtfc36ed7e2013-04-24 16:57:33 +00003522u64 btrfs_tree_mod_seq_prev(u64 seq);
Jan Schmidt5b6602e2012-10-23 11:28:27 +02003523int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
Jan Schmidt097b8a72012-06-21 11:08:04 +02003524
Chris Masondee26a92007-03-26 16:00:06 -04003525/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05003526int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003527 struct btrfs_path *path,
3528 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05003529int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3530 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003531 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3532 const char *name, int name_len);
3533int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3534 struct btrfs_root *tree_root,
3535 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05003536 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04003537int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3538 struct btrfs_key *key);
3539int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3540 *root, struct btrfs_key *key, struct btrfs_root_item
3541 *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04003542int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3543 struct btrfs_root *root,
3544 struct btrfs_key *key,
3545 struct btrfs_root_item *item);
Miao Xiecb517ea2013-05-15 07:48:19 +00003546int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3547 struct btrfs_path *path, struct btrfs_root_item *root_item,
3548 struct btrfs_key *root_key);
Yan, Zheng76dda932009-09-21 16:00:26 -04003549int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00003550void btrfs_set_root_node(struct btrfs_root_item *item,
3551 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00003552void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003553void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3554 struct btrfs_root *root);
Li Zefan08fe4db2011-03-28 02:01:25 +00003555
Stefan Behrens07b30a42013-08-15 17:11:17 +02003556/* uuid-tree.c */
3557int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3558 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3559 u64 subid);
3560int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3561 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3562 u64 subid);
Stefan Behrens70f80172013-08-15 17:11:23 +02003563int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3564 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3565 u64));
Stefan Behrens07b30a42013-08-15 17:11:17 +02003566
Chris Masondee26a92007-03-26 16:00:06 -04003567/* dir-item.c */
Chris Mason9c520572012-12-17 14:26:57 -05003568int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3569 const char *name, int name_len);
Chris Masond3977122009-01-05 21:25:51 -05003570int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3571 struct btrfs_root *root, const char *name,
Miao Xie16cdcec2011-04-22 18:12:22 +08003572 int name_len, struct inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04003573 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04003574struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3575 struct btrfs_root *root,
3576 struct btrfs_path *path, u64 dir,
3577 const char *name, int name_len,
3578 int mod);
3579struct btrfs_dir_item *
3580btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3581 struct btrfs_root *root,
3582 struct btrfs_path *path, u64 dir,
3583 u64 objectid, const char *name, int name_len,
3584 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003585struct btrfs_dir_item *
3586btrfs_search_dir_index_item(struct btrfs_root *root,
3587 struct btrfs_path *path, u64 dirid,
3588 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003589int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3590 struct btrfs_root *root,
3591 struct btrfs_path *path,
3592 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05003593int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003594 struct btrfs_root *root,
3595 struct btrfs_path *path, u64 objectid,
3596 const char *name, u16 name_len,
3597 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05003598struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3599 struct btrfs_root *root,
3600 struct btrfs_path *path, u64 dir,
3601 const char *name, u16 name_len,
3602 int mod);
Josef Bacik22a94d42011-03-16 16:47:17 -04003603int verify_dir_item(struct btrfs_root *root,
3604 struct extent_buffer *leaf,
3605 struct btrfs_dir_item *dir_item);
Josef Bacik7b128762008-07-24 12:17:14 -04003606
3607/* orphan.c */
3608int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3609 struct btrfs_root *root, u64 offset);
3610int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3611 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003612int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04003613
Chris Masondee26a92007-03-26 16:00:06 -04003614/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05003615int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3616 struct btrfs_root *root,
3617 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003618 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05003619int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3620 struct btrfs_root *root,
3621 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003622 u64 inode_objectid, u64 ref_objectid, u64 *index);
Chris Mason5f39d392007-10-15 16:14:19 -04003623int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3624 struct btrfs_root *root,
3625 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04003626int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04003627 *root, struct btrfs_path *path,
3628 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04003629
Mark Fashehf1863732012-08-08 11:32:27 -07003630struct btrfs_inode_extref *
3631btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3632 struct btrfs_root *root,
3633 struct btrfs_path *path,
3634 const char *name, int name_len,
3635 u64 inode_objectid, u64 ref_objectid, int ins_len,
3636 int cow);
3637
3638int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3639 u64 ref_objectid, const char *name,
3640 int name_len,
3641 struct btrfs_inode_extref **extref_ret);
3642
Chris Masondee26a92007-03-26 16:00:06 -04003643/* file-item.c */
Miao Xiefacc8a222013-07-25 19:22:34 +08003644struct btrfs_dio_private;
Chris Mason459931e2008-12-10 09:10:46 -05003645int btrfs_del_csums(struct btrfs_trans_handle *trans,
3646 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04003647int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003648 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04003649int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
Miao Xiefacc8a222013-07-25 19:22:34 +08003650 struct btrfs_dio_private *dip, struct bio *bio,
3651 u64 logical_offset);
Chris Masonb18c6682007-04-17 13:26:50 -04003652int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04003653 struct btrfs_root *root,
3654 u64 objectid, u64 pos,
3655 u64 disk_offset, u64 disk_num_bytes,
3656 u64 num_bytes, u64 offset, u64 ram_bytes,
3657 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04003658int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3659 struct btrfs_root *root,
3660 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04003661 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05003662int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05003663 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04003664 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04003665int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003666 struct bio *bio, u64 file_start, int contig);
Arne Jansena2de7332011-03-08 14:14:00 +01003667int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3668 struct list_head *list, int search_commit);
Chris Mason39279cc2007-06-12 06:35:45 -04003669/* inode.c */
Miao Xie8ccf6f192012-10-25 09:28:04 +00003670struct btrfs_delalloc_work {
3671 struct inode *inode;
3672 int wait;
3673 int delay_iput;
3674 struct completion completion;
3675 struct list_head list;
3676 struct btrfs_work work;
3677};
3678
3679struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3680 int wait, int delay_iput);
3681void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3682
Josef Bacikb2675152011-07-18 13:21:36 -04003683struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3684 size_t pg_offset, u64 start, u64 len,
3685 int create);
Josef Bacik00361582013-08-14 14:02:47 -04003686noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
Josef Bacik7ee9e442013-06-21 16:37:03 -04003687 u64 *orig_start, u64 *orig_block_len,
3688 u64 *ram_bytes);
Chris Mason4881ee52008-07-24 09:51:08 -04003689
3690/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04003691#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04003692#define ClearPageChecked ClearPageFsMisc
3693#define SetPageChecked SetPageFsMisc
3694#define PageChecked PageFsMisc
3695#endif
3696
Li Zefanb6973aa2011-07-20 03:46:35 +00003697/* This forces readahead on a given range of bytes in an inode */
3698static inline void btrfs_force_ra(struct address_space *mapping,
3699 struct file_ra_state *ra, struct file *file,
3700 pgoff_t offset, unsigned long req_size)
3701{
3702 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3703}
3704
Chris Mason3de45862008-11-17 21:02:50 -05003705struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3706int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04003707int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3708 struct btrfs_root *root,
3709 struct inode *dir, struct inode *inode,
3710 const char *name, int name_len);
3711int btrfs_add_link(struct btrfs_trans_handle *trans,
3712 struct inode *parent_inode, struct inode *inode,
3713 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003714int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3715 struct btrfs_root *root,
3716 struct inode *dir, u64 objectid,
3717 const char *name, int name_len);
Josef Bacik2aaa6652012-08-29 14:27:18 -04003718int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3719 int front);
Chris Masone02119d2008-09-05 16:13:11 -04003720int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3721 struct btrfs_root *root,
3722 struct inode *inode, u64 new_size,
3723 u32 min_type);
3724
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003725int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Miao Xie91aef862013-11-04 23:13:26 +08003726int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput);
Josef Bacik2ac55d42010-02-03 19:33:23 +00003727int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3728 struct extent_state **cached_state);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003729int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Filipe David Borba Manana63541922014-01-07 11:47:46 +00003730 struct btrfs_root *new_root,
3731 struct btrfs_root *parent_root,
3732 u64 new_dirid);
David Woodhouse64a16702009-07-15 23:29:37 +01003733int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3734 size_t size, struct bio *bio,
3735 unsigned long bio_flags);
Nick Pigginc2ec1752009-03-31 15:23:21 -07003736int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04003737int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04003738void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01003739int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04003740struct inode *btrfs_alloc_inode(struct super_block *sb);
3741void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04003742int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003743int btrfs_init_cachep(void);
3744void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04003745long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05303746struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00003747 struct btrfs_root *root, int *was_new);
Chris Masona52d9a82007-08-27 16:49:44 -04003748struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +02003749 size_t pg_offset, u64 start, u64 end,
Chris Masona52d9a82007-08-27 16:49:44 -04003750 int create);
3751int btrfs_update_inode(struct btrfs_trans_handle *trans,
3752 struct btrfs_root *root,
3753 struct inode *inode);
Josef Bacikbe6aef62012-10-22 15:43:12 -04003754int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3755 struct btrfs_root *root, struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04003756int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05003757int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003758void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3759 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05003760int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003761void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003762void btrfs_add_delayed_iput(struct inode *inode);
3763void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04003764int btrfs_prealloc_file_range(struct inode *inode, int mode,
3765 u64 start, u64 num_bytes, u64 min_size,
3766 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04003767int btrfs_prealloc_file_range_trans(struct inode *inode,
3768 struct btrfs_trans_handle *trans, int mode,
3769 u64 start, u64 num_bytes, u64 min_size,
3770 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04003771extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04003772
3773/* ioctl.c */
3774long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02003775void btrfs_update_iflags(struct inode *inode);
3776void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Stefan Behrensdd5f9612013-08-15 17:11:20 +02003777int btrfs_is_empty_uuid(u8 *uuid);
Chris Mason4cb53002011-05-24 15:35:30 -04003778int btrfs_defrag_file(struct inode *inode, struct file *file,
3779 struct btrfs_ioctl_defrag_range_args *range,
3780 u64 newer_than, unsigned long max_pages);
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02003781void btrfs_get_block_group_info(struct list_head *groups_list,
3782 struct btrfs_ioctl_space_info *space);
Stefan Behrens35a36212013-08-14 18:12:25 +02003783void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3784 struct btrfs_ioctl_balance_args *bargs);
3785
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02003786
Chris Mason39279cc2007-06-12 06:35:45 -04003787/* file.c */
Miao Xie9247f312012-11-26 09:24:43 +00003788int btrfs_auto_defrag_init(void);
3789void btrfs_auto_defrag_exit(void);
Chris Mason4cb53002011-05-24 15:35:30 -04003790int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3791 struct inode *inode);
3792int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Miao Xie26176e72012-11-26 09:26:20 +00003793void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04003794int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Josef Bacik7014cdb2012-08-30 20:06:49 -04003795void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3796 int skip_pinned);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07003797extern const struct file_operations btrfs_file_operations;
Josef Bacik5dc562c2012-08-17 13:14:17 -04003798int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3799 struct btrfs_root *root, struct inode *inode,
3800 struct btrfs_path *path, u64 start, u64 end,
Filipe David Borba Manana1acae572014-01-07 11:42:27 +00003801 u64 *drop_end, int drop_cache,
3802 int replace_extent,
3803 u32 extent_item_size,
3804 int *key_inserted);
Josef Bacik5dc562c2012-08-17 13:14:17 -04003805int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3806 struct btrfs_root *root, struct inode *inode, u64 start,
Josef Bacik26714852012-08-29 12:24:27 -04003807 u64 end, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04003808int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04003809 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04003810int btrfs_release_file(struct inode *inode, struct file *file);
Josef Bacikbe1a12a2011-04-06 13:05:22 -04003811int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3812 struct page **pages, size_t num_pages,
3813 loff_t pos, size_t write_bytes,
3814 struct extent_state **cached);
Sage Weil6bf13c02008-06-10 10:07:39 -04003815
Chris Mason6702ed42007-08-07 16:15:09 -04003816/* tree-defrag.c */
3817int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
Eric Sandeende78b512013-01-31 18:21:12 +00003818 struct btrfs_root *root);
Josef Bacik58176a92007-08-29 15:47:34 -04003819
3820/* sysfs.c */
3821int btrfs_init_sysfs(void);
3822void btrfs_exit_sysfs(void);
Jeff Mahoney5ac1d202013-11-01 13:06:58 -04003823int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3824void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
Josef Bacik58176a92007-08-29 15:47:34 -04003825
Josef Bacik5103e942007-11-16 11:45:54 -05003826/* xattr.c */
3827ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04003828
Chris Masonedbd8d42007-12-21 16:27:24 -05003829/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04003830int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04003831int btrfs_sync_fs(struct super_block *sb, int wait);
Joe Perches533574c2012-07-30 14:40:13 -07003832
3833#ifdef CONFIG_PRINTK
3834__printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003835void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
Joe Perches533574c2012-07-30 14:40:13 -07003836#else
3837static inline __printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003838void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
Joe Perches533574c2012-07-30 14:40:13 -07003839{
3840}
3841#endif
3842
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003843#define btrfs_emerg(fs_info, fmt, args...) \
3844 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3845#define btrfs_alert(fs_info, fmt, args...) \
3846 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3847#define btrfs_crit(fs_info, fmt, args...) \
3848 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3849#define btrfs_err(fs_info, fmt, args...) \
3850 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3851#define btrfs_warn(fs_info, fmt, args...) \
3852 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3853#define btrfs_notice(fs_info, fmt, args...) \
3854 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3855#define btrfs_info(fs_info, fmt, args...) \
3856 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05003857
3858#ifdef DEBUG
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003859#define btrfs_debug(fs_info, fmt, args...) \
3860 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05003861#else
3862#define btrfs_debug(fs_info, fmt, args...) \
3863 no_printk(KERN_DEBUG fmt, ##args)
3864#endif
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003865
Josef Bacik2e17c7c2013-08-26 16:53:15 -04003866#ifdef CONFIG_BTRFS_ASSERT
3867
3868static inline void assfail(char *expr, char *file, int line)
3869{
Frank Holtonefe120a2013-12-20 11:37:06 -05003870 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
Josef Bacik2e17c7c2013-08-26 16:53:15 -04003871 expr, file, line);
3872 BUG();
3873}
3874
3875#define ASSERT(expr) \
3876 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3877#else
3878#define ASSERT(expr) ((void)0)
3879#endif
3880
3881#define btrfs_assert()
Joe Perches533574c2012-07-30 14:40:13 -07003882__printf(5, 6)
liuboacce9522011-01-06 19:30:25 +08003883void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01003884 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08003885
Joe Perches533574c2012-07-30 14:40:13 -07003886
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003887void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3888 struct btrfs_root *root, const char *function,
3889 unsigned int line, int errno);
3890
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06003891#define btrfs_set_fs_incompat(__fs_info, opt) \
3892 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3893
3894static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3895 u64 flag)
3896{
3897 struct btrfs_super_block *disk_super;
3898 u64 features;
3899
3900 disk_super = fs_info->super_copy;
3901 features = btrfs_super_incompat_flags(disk_super);
3902 if (!(features & flag)) {
Miao Xieceda0862013-04-11 10:30:16 +00003903 spin_lock(&fs_info->super_lock);
3904 features = btrfs_super_incompat_flags(disk_super);
3905 if (!(features & flag)) {
3906 features |= flag;
3907 btrfs_set_super_incompat_flags(disk_super, features);
Frank Holtonefe120a2013-12-20 11:37:06 -05003908 btrfs_info(fs_info, "setting %llu feature flag",
Miao Xieceda0862013-04-11 10:30:16 +00003909 flag);
3910 }
3911 spin_unlock(&fs_info->super_lock);
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06003912 }
3913}
3914
Josef Bacik3173a182013-03-07 14:22:04 -05003915#define btrfs_fs_incompat(fs_info, opt) \
3916 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3917
3918static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3919{
3920 struct btrfs_super_block *disk_super;
3921 disk_super = fs_info->super_copy;
3922 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3923}
3924
David Sterba005d6422012-09-18 07:52:32 -06003925/*
3926 * Call btrfs_abort_transaction as early as possible when an error condition is
3927 * detected, that way the exact line number is reported.
3928 */
3929
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003930#define btrfs_abort_transaction(trans, root, errno) \
3931do { \
3932 __btrfs_abort_transaction(trans, root, __func__, \
3933 __LINE__, errno); \
3934} while (0)
liuboacce9522011-01-06 19:30:25 +08003935
3936#define btrfs_std_error(fs_info, errno) \
3937do { \
3938 if ((errno)) \
Jeff Mahoney4da35112012-03-01 14:57:30 +01003939 __btrfs_std_error((fs_info), __func__, \
3940 __LINE__, (errno), NULL); \
3941} while (0)
3942
3943#define btrfs_error(fs_info, errno, fmt, args...) \
3944do { \
3945 __btrfs_std_error((fs_info), __func__, __LINE__, \
3946 (errno), fmt, ##args); \
liuboacce9522011-01-06 19:30:25 +08003947} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04003948
Joe Perches533574c2012-07-30 14:40:13 -07003949__printf(5, 6)
Jeff Mahoney8c342932011-10-03 23:22:31 -04003950void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3951 unsigned int line, int errno, const char *fmt, ...);
3952
Eric Sandeenaa43a172013-01-31 00:54:55 +00003953/*
3954 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3955 * will panic(). Otherwise we BUG() here.
3956 */
Jeff Mahoney8c342932011-10-03 23:22:31 -04003957#define btrfs_panic(fs_info, errno, fmt, args...) \
3958do { \
Eric Sandeenaa43a172013-01-31 00:54:55 +00003959 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3960 BUG(); \
Chris Masoneb60cea2007-02-02 09:18:22 -05003961} while (0)
3962
3963/* acl.c */
3964#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02003965struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Christoph Hellwig996a7102013-12-20 05:16:43 -08003966int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
Chris Masoneb60cea2007-02-02 09:18:22 -05003967int btrfs_init_acl(struct btrfs_trans_handle *trans,
3968 struct inode *inode, struct inode *dir);
Li Zefan9b89d952011-07-14 03:17:39 +00003969#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10003970#define btrfs_get_acl NULL
Christoph Hellwig996a7102013-12-20 05:16:43 -08003971#define btrfs_set_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00003972static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3973 struct inode *inode, struct inode *dir)
3974{
3975 return 0;
3976}
Li Zefan9b89d952011-07-14 03:17:39 +00003977#endif
Chris Masoneb60cea2007-02-02 09:18:22 -05003978
3979/* relocation.c */
3980int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3981int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3982 struct btrfs_root *root);
3983int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3984 struct btrfs_root *root);
3985int btrfs_recover_relocation(struct btrfs_root *root);
3986int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Josef Bacik83d4cfd2013-08-30 15:09:51 -04003987int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3988 struct btrfs_root *root, struct extent_buffer *buf,
3989 struct extent_buffer *cow);
Chris Masoneb60cea2007-02-02 09:18:22 -05003990void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3991 struct btrfs_pending_snapshot *pending,
3992 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003993int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Chris Masoneb60cea2007-02-02 09:18:22 -05003994 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01003995
3996/* scrub.c */
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01003997int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3998 u64 end, struct btrfs_scrub_progress *progress,
Stefan Behrens63a212a2012-11-05 18:29:28 +01003999 int readonly, int is_dev_replace);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004000void btrfs_scrub_pause(struct btrfs_root *root);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004001void btrfs_scrub_continue(struct btrfs_root *root);
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01004002int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4003int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4004 struct btrfs_device *dev);
Arne Jansena2de7332011-03-08 14:14:00 +01004005int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4006 struct btrfs_scrub_progress *progress);
4007
Arne Jansen7414a032011-05-23 14:33:49 +02004008/* reada.c */
4009struct reada_control {
4010 struct btrfs_root *root; /* tree to prefetch */
4011 struct btrfs_key key_start;
4012 struct btrfs_key key_end; /* exclusive */
4013 atomic_t elems;
4014 struct kref refcnt;
4015 wait_queue_head_t wait;
4016};
4017struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4018 struct btrfs_key *start, struct btrfs_key *end);
4019int btrfs_reada_wait(void *handle);
4020void btrfs_reada_detach(void *handle);
4021int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4022 u64 start, int err);
4023
Arne Jansenbed92ea2012-06-28 18:03:02 +02004024/* qgroup.c */
4025struct qgroup_update {
Jan Schmidt64947ec2012-05-16 16:57:09 +02004026 struct list_head list;
Arne Jansenbed92ea2012-06-28 18:03:02 +02004027 struct btrfs_delayed_ref_node *node;
4028 struct btrfs_delayed_extent_op *extent_op;
Jan Schmidt64947ec2012-05-16 16:57:09 +02004029};
4030
Arne Jansenbed92ea2012-06-28 18:03:02 +02004031int btrfs_quota_enable(struct btrfs_trans_handle *trans,
4032 struct btrfs_fs_info *fs_info);
4033int btrfs_quota_disable(struct btrfs_trans_handle *trans,
4034 struct btrfs_fs_info *fs_info);
Jan Schmidt2f232032013-04-25 16:04:51 +00004035int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
Jan Schmidtb382a322013-05-28 15:47:24 +00004036void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
Jan Schmidt57254b6e2013-05-06 19:14:17 +00004037int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02004038int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
4039 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4040int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
4041 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4042int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
4043 struct btrfs_fs_info *fs_info, u64 qgroupid,
4044 char *name);
4045int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
4046 struct btrfs_fs_info *fs_info, u64 qgroupid);
4047int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
4048 struct btrfs_fs_info *fs_info, u64 qgroupid,
4049 struct btrfs_qgroup_limit *limit);
4050int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
4051void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
4052struct btrfs_delayed_extent_op;
4053int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
4054 struct btrfs_delayed_ref_node *node,
4055 struct btrfs_delayed_extent_op *extent_op);
4056int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
4057 struct btrfs_fs_info *fs_info,
4058 struct btrfs_delayed_ref_node *node,
4059 struct btrfs_delayed_extent_op *extent_op);
4060int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
4061 struct btrfs_fs_info *fs_info);
4062int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
4063 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
4064 struct btrfs_qgroup_inherit *inherit);
4065int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
4066void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
4067
4068void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
Jan Schmidtbd989ba2012-05-16 17:18:50 +02004069
Jan Schmidt95a06072012-05-29 17:06:54 +02004070static inline int is_fstree(u64 rootid)
4071{
4072 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4073 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4074 return 1;
4075 return 0;
4076}
David Sterba210549e2013-02-09 23:38:06 +00004077
4078static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4079{
4080 return signal_pending(current);
4081}
4082
Josef Bacikaaedb552013-10-11 14:44:09 -04004083/* Sanity test specific functions */
4084#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4085void btrfs_test_destroy_inode(struct inode *inode);
4086#endif
David Sterba210549e2013-02-09 23:38:06 +00004087
Chris Masoneb60cea2007-02-02 09:18:22 -05004088#endif