blob: 938efe33be809240bc19bdf81d854c623191a3d8 [file] [log] [blame]
Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
Chris Masoneb60cea2007-02-02 09:18:22 -050021
Chris Mason810191f2007-10-15 16:18:55 -040022#include <linux/mm.h>
23#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040024#include <linux/fs.h>
Arne Jansena2de7332011-03-08 14:14:00 +010025#include <linux/rwsem.h>
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>
Miao Xie21c7e752014-05-13 17:29:04 -070036#include <linux/workqueue.h>
Qu Wenruof667aef2014-09-23 13:40:08 +080037#include <linux/security.h>
Chris Masond1310b22008-01-24 16:13:08 -050038#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040039#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040040#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040041
Chris Masone089f052007-03-16 16:20:31 -040042struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040043struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040044struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040045extern struct kmem_cache *btrfs_trans_handle_cachep;
46extern struct kmem_cache *btrfs_transaction_cachep;
47extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040048extern struct kmem_cache *btrfs_path_cachep;
Josef Bacikdc89e982011-01-28 17:05:48 -050049extern struct kmem_cache *btrfs_free_space_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040050struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040051
Josef Bacik294e30f2013-10-09 12:00:56 -040052#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
53#define STATIC noinline
54#else
55#define STATIC static noinline
56#endif
57
Zach Browncdb4c572013-02-20 00:55:13 +000058#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
Chris Masoneb60cea2007-02-02 09:18:22 -050059
Stefan Behrens72d7aef2012-11-06 14:57:46 +010060#define BTRFS_MAX_MIRRORS 3
Stefan Behrens94598ba2012-03-27 14:21:26 -040061
Chris Mason4008c042009-02-12 14:09:45 -050062#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040063
Yan Zheng5d4f98a2009-06-10 10:45:14 -040064#define BTRFS_COMPAT_EXTENT_TREE_V0
65
Chris Mason0b86a832008-03-24 15:01:56 -040066/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040067#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040068
69/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040070#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040071
Chris Mason0b86a832008-03-24 15:01:56 -040072/*
73 * chunk tree stores translations from logical -> physical block numbering
74 * the super block points to the chunk tree
75 */
Chris Masone085def2008-03-24 15:02:07 -040076#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040077
78/*
79 * stores information about which areas of a given device are in use.
80 * one per device. The tree of tree roots points to the device tree
81 */
Chris Masone085def2008-03-24 15:02:07 -040082#define BTRFS_DEV_TREE_OBJECTID 4ULL
83
84/* one per subvolume, storing files and directories */
85#define BTRFS_FS_TREE_OBJECTID 5ULL
86
87/* directory objectid inside the root tree */
88#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040089
Chris Masond20f7042008-12-08 16:58:54 -050090/* holds checksums of all the data extents */
91#define BTRFS_CSUM_TREE_OBJECTID 7ULL
92
Arne Jansen630dc772011-09-13 11:06:07 +020093/* holds quota configuration and tracking */
94#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
95
Stefan Behrens07b30a42013-08-15 17:11:17 +020096/* for storing items that use the BTRFS_UUID_KEY* types */
97#define BTRFS_UUID_TREE_OBJECTID 9ULL
98
David Sterba60b62972013-04-30 17:29:29 +000099/* for storing balance parameters in the root tree */
100#define BTRFS_BALANCE_OBJECTID -4ULL
101
Josef Bacik7b128762008-07-24 12:17:14 -0400102/* orhpan objectid for tracking unlinked/truncated files */
103#define BTRFS_ORPHAN_OBJECTID -5ULL
104
Chris Masone02119d2008-09-05 16:13:11 -0400105/* does write ahead logging to speed up fsyncs */
106#define BTRFS_TREE_LOG_OBJECTID -6ULL
107#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
108
Zheng Yane4657682008-09-26 10:04:53 -0400109/* for space balancing */
110#define BTRFS_TREE_RELOC_OBJECTID -8ULL
111#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
112
Chris Masond20f7042008-12-08 16:58:54 -0500113/*
114 * extent checksums all have this objectid
115 * this allows them to share the logging tree
116 * for fsyncs
117 */
118#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
119
Josef Bacik0af3d002010-06-21 14:48:16 -0400120/* For storing free space cache */
121#define BTRFS_FREE_SPACE_OBJECTID -11ULL
122
Li Zefan82d59022011-04-20 10:33:24 +0800123/*
Wang Sheng-Hui527a1362012-09-06 13:33:37 +0800124 * The inode number assigned to the special inode for storing
Li Zefan82d59022011-04-20 10:33:24 +0800125 * free ino cache
126 */
127#define BTRFS_FREE_INO_OBJECTID -12ULL
128
Zheng Yan31840ae2008-09-23 13:14:14 -0400129/* dummy objectid represents multiple objectids */
130#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
131
Chris Mason0b86a832008-03-24 15:01:56 -0400132/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400133 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400134 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500135#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400136#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400137#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400138
Chris Mason0b86a832008-03-24 15:01:56 -0400139
140/*
141 * the device items go into the chunk tree. The key is in the form
142 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
143 */
144#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
145
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400146#define BTRFS_BTREE_INODE_OBJECTID 1
147
148#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
149
Geert Uytterhoeven6e71c472013-08-20 13:20:08 +0200150#define BTRFS_DEV_REPLACE_DEVID 0ULL
Stefan Behrense93c89c2012-11-05 17:33:06 +0100151
Chris Masonfec577f2007-02-26 10:40:21 -0500152/*
Chris Mason727011e2010-08-06 13:21:20 -0400153 * the max metadata block size. This limit is somewhat artificial,
154 * but the memmove costs go through the roof for larger blocks.
155 */
156#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
157
158/*
Chris Masone20d96d2007-03-22 12:13:20 -0400159 * we can actually store much bigger names, but lets not confuse the rest
160 * of linux
161 */
162#define BTRFS_NAME_LEN 255
163
Mark Fashehf1863732012-08-08 11:32:27 -0700164/*
165 * Theoretical limit is larger, but we keep this down to a sane
166 * value. That should limit greatly the possibility of collisions on
167 * inode ref items.
168 */
169#define BTRFS_LINK_MAX 65535U
170
Chris Masonf254e522007-03-29 15:15:27 -0400171/* 32 bytes in various csum fields */
172#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500173
174/* csum types */
175#define BTRFS_CSUM_TYPE_CRC32 0
176
Qu Wenruo1f6e4b32015-05-05 10:53:15 +0800177static int btrfs_csum_sizes[] = { 4 };
Josef Bacik607d4322008-12-02 07:17:45 -0500178
Chris Mason509659c2007-05-10 12:36:17 -0400179/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500180#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400181
Stefan Behrens29a8d9a2012-11-06 14:16:24 +0100182/* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
183#define REQ_GET_READ_MIRRORS (1 << 30)
184
Chris Masonfabb5682007-06-07 22:13:21 -0400185#define BTRFS_FT_UNKNOWN 0
186#define BTRFS_FT_REG_FILE 1
187#define BTRFS_FT_DIR 2
188#define BTRFS_FT_CHRDEV 3
189#define BTRFS_FT_BLKDEV 4
190#define BTRFS_FT_FIFO 5
191#define BTRFS_FT_SOCK 6
192#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500193#define BTRFS_FT_XATTR 8
194#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400195
Stefan Behrens3d136a12012-02-03 11:20:04 +0100196/* ioprio of readahead is set to idle */
197#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
198
Miao Xiee2d84522013-01-29 10:09:20 +0000199#define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
200
Josef Bacikdcab6a32015-02-11 15:08:59 -0500201#define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
202
Chris Masone20d96d2007-03-22 12:13:20 -0400203/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400204 * The key defines the order in the tree, and so it also defines (optimal)
205 * block layout.
206 *
207 * objectid corresponds to the inode number.
208 *
209 * type tells us things about the object, and is a kind of stream selector.
210 * so for a given inode, keys with type of 1 might refer to the inode data,
211 * type of 2 may point to file data in the btree and type == 3 may point to
212 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500213 *
214 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400215 *
216 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
217 * in cpu native order. Otherwise they are identical and their sizes
218 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500219 */
Chris Masone2fa7222007-03-12 16:22:34 -0400220struct btrfs_disk_key {
221 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400222 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400223 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400224} __attribute__ ((__packed__));
225
226struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500227 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400228 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400229 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500230} __attribute__ ((__packed__));
231
Chris Mason0b86a832008-03-24 15:01:56 -0400232struct btrfs_mapping_tree {
233 struct extent_map_tree map_tree;
234};
235
Chris Mason0b86a832008-03-24 15:01:56 -0400236struct btrfs_dev_item {
237 /* the internal btrfs device id */
238 __le64 devid;
239
240 /* size of the device */
241 __le64 total_bytes;
242
243 /* bytes used */
244 __le64 bytes_used;
245
246 /* optimal io alignment for this device */
247 __le32 io_align;
248
249 /* optimal io width for this device */
250 __le32 io_width;
251
252 /* minimal io size for this device */
253 __le32 sector_size;
254
Chris Mason0b86a832008-03-24 15:01:56 -0400255 /* type and info about this device */
256 __le64 type;
257
Yan Zheng2b820322008-11-17 21:11:30 -0500258 /* expected generation for this device */
259 __le64 generation;
260
Chris Masonc3027eb2008-12-08 16:40:21 -0500261 /*
262 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400263 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500264 */
265 __le64 start_offset;
266
Chris Masone17cade2008-04-15 15:41:47 -0400267 /* grouping information for allocation decisions */
268 __le32 dev_group;
269
270 /* seek speed 0-100 where 100 is fastest */
271 u8 seek_speed;
272
273 /* bandwidth 0-100 where 100 is fastest */
274 u8 bandwidth;
275
Chris Mason0d81ba52008-03-24 15:02:07 -0400276 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400277 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500278
279 /* uuid of FS who owns this device */
280 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400281} __attribute__ ((__packed__));
282
283struct btrfs_stripe {
284 __le64 devid;
285 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400286 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400287} __attribute__ ((__packed__));
288
289struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400290 /* size of this chunk in bytes */
291 __le64 length;
292
293 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400294 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400295
Chris Mason0b86a832008-03-24 15:01:56 -0400296 __le64 stripe_len;
297 __le64 type;
298
299 /* optimal io alignment for this chunk */
300 __le32 io_align;
301
302 /* optimal io width for this chunk */
303 __le32 io_width;
304
305 /* minimal io size for this chunk */
306 __le32 sector_size;
307
308 /* 2^16 stripes is quite a lot, a second limit is the size of a single
309 * item in the btree
310 */
311 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400312
313 /* sub stripes only matter for raid10 */
314 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400315 struct btrfs_stripe stripe;
316 /* additional stripes go here */
317} __attribute__ ((__packed__));
318
Josef Bacik0af3d002010-06-21 14:48:16 -0400319#define BTRFS_FREE_SPACE_EXTENT 1
320#define BTRFS_FREE_SPACE_BITMAP 2
321
322struct btrfs_free_space_entry {
323 __le64 offset;
324 __le64 bytes;
325 u8 type;
326} __attribute__ ((__packed__));
327
328struct btrfs_free_space_header {
329 struct btrfs_disk_key location;
330 __le64 generation;
331 __le64 num_entries;
332 __le64 num_bitmaps;
333} __attribute__ ((__packed__));
334
Chris Mason0b86a832008-03-24 15:01:56 -0400335static inline unsigned long btrfs_chunk_item_size(int num_stripes)
336{
337 BUG_ON(num_stripes == 0);
338 return sizeof(struct btrfs_chunk) +
339 sizeof(struct btrfs_stripe) * (num_stripes - 1);
340}
341
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400342#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
343#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
liuboacce9522011-01-06 19:30:25 +0800344
345/*
346 * File system states
347 */
Miao Xie87533c42013-01-29 10:14:48 +0000348#define BTRFS_FS_STATE_ERROR 0
Miao Xiedc81cdc2013-02-20 23:32:52 -0700349#define BTRFS_FS_STATE_REMOUNTING 1
David Sterba08748812013-03-12 14:46:08 +0000350#define BTRFS_FS_STATE_TRANS_ABORTED 2
Miao Xiec404e0d2014-01-30 16:46:55 +0800351#define BTRFS_FS_STATE_DEV_REPLACING 3
liuboacce9522011-01-06 19:30:25 +0800352
Miao Xie87533c42013-01-29 10:14:48 +0000353/* Super block flags */
liuboacce9522011-01-06 19:30:25 +0800354/* Errors detected */
355#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
356
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400357#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
358#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
359
360#define BTRFS_BACKREF_REV_MAX 256
361#define BTRFS_BACKREF_REV_SHIFT 56
362#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
363 BTRFS_BACKREF_REV_SHIFT)
364
365#define BTRFS_OLD_BACKREF_REV 0
366#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400367
Chris Masonfec577f2007-02-26 10:40:21 -0500368/*
369 * every tree block (leaf or node) starts with this header.
370 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400371struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400372 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400373 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400374 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400375 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400376 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400377
378 /* allowed to be different from the super from here on down */
379 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400380 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400381 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400382 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400383 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500384} __attribute__ ((__packed__));
385
Chris Mason5f39d392007-10-15 16:14:19 -0400386#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500387 sizeof(struct btrfs_header)) / \
388 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400389#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
David Sterba707e8a02014-06-04 19:22:26 +0200390#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
David Sterba7ec20af2014-07-24 17:34:58 +0200391#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
392 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
Chris Mason236454df2007-04-19 13:37:44 -0400393#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
394 sizeof(struct btrfs_item) - \
David Sterba7ec20af2014-07-24 17:34:58 +0200395 BTRFS_FILE_EXTENT_INLINE_DATA_START)
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;
David Sterba707e8a02014-06-04 19:22:26 +0200475 __le32 __unused_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;
Josef Bacik3f8a18c2014-03-28 17:16:01 -0400611 unsigned int need_commit_sem:1;
Filipe Manana5f5bc6b2014-11-09 08:38:39 +0000612 unsigned int skip_release_on_error:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500613};
Chris Mason5de08d72007-02-24 06:24:44 -0500614
Chris Mason62e27492007-03-15 12:56:47 -0400615/*
616 * items in the extent btree are used to record the objectid of the
617 * owner of the block and the number of references
618 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400619
Chris Mason62e27492007-03-15 12:56:47 -0400620struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400621 __le64 refs;
622 __le64 generation;
623 __le64 flags;
624} __attribute__ ((__packed__));
625
626struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400627 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500628} __attribute__ ((__packed__));
629
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400630#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
631 sizeof(struct btrfs_item))
632
633#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
634#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
635
636/* following flags only apply to tree blocks */
637
638/* use full backrefs for extent pointers in the block */
639#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
640
Arne Jansena2de7332011-03-08 14:14:00 +0100641/*
642 * this flag is only used internally by scrub and may be changed at any time
643 * it is only declared here to avoid collisions
644 */
645#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
646
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400647struct btrfs_tree_block_info {
648 struct btrfs_disk_key key;
649 u8 level;
650} __attribute__ ((__packed__));
651
652struct btrfs_extent_data_ref {
653 __le64 root;
654 __le64 objectid;
655 __le64 offset;
656 __le32 count;
657} __attribute__ ((__packed__));
658
659struct btrfs_shared_data_ref {
660 __le32 count;
661} __attribute__ ((__packed__));
662
663struct btrfs_extent_inline_ref {
664 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400665 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400666} __attribute__ ((__packed__));
667
668/* old style backrefs item */
669struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500670 __le64 root;
671 __le64 generation;
672 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400673 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400674} __attribute__ ((__packed__));
675
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400676
Chris Mason0b86a832008-03-24 15:01:56 -0400677/* dev extents record free space on individual devices. The owner
678 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400679 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400680 */
681struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400682 __le64 chunk_tree;
683 __le64 chunk_objectid;
684 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400685 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400686 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400687} __attribute__ ((__packed__));
688
Chris Mason39544012007-12-12 14:38:19 -0500689struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400690 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500691 __le16 name_len;
692 /* name goes here */
693} __attribute__ ((__packed__));
694
Mark Fashehf1863732012-08-08 11:32:27 -0700695struct btrfs_inode_extref {
696 __le64 parent_objectid;
697 __le64 index;
698 __le16 name_len;
699 __u8 name[0];
700 /* name goes here */
701} __attribute__ ((__packed__));
702
Chris Mason0b86a832008-03-24 15:01:56 -0400703struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400704 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400705 __le32 nsec;
706} __attribute__ ((__packed__));
707
Jan Engelhardt95029d72009-01-21 10:49:16 -0500708enum btrfs_compression_type {
Li Zefan261507a02010-12-17 14:21:50 +0800709 BTRFS_COMPRESS_NONE = 0,
710 BTRFS_COMPRESS_ZLIB = 1,
Li Zefana6fa6fa2010-10-25 15:12:26 +0800711 BTRFS_COMPRESS_LZO = 2,
712 BTRFS_COMPRESS_TYPES = 2,
713 BTRFS_COMPRESS_LAST = 3,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500714};
Chris Masonc8b97812008-10-29 14:49:59 -0400715
Chris Mason1e1d2702007-03-15 19:03:33 -0400716struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400717 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400718 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400719 /* transid that last touched this inode */
720 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400721 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400722 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400723 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400724 __le32 nlink;
725 __le32 uid;
726 __le32 gid;
727 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400728 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500729 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400730
Chris Masonc3027eb2008-12-08 16:40:21 -0500731 /* modification sequence number for NFS */
732 __le64 sequence;
733
734 /*
735 * a little future expansion, for more than this we can
736 * just grow the inode item and version it
737 */
738 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400739 struct btrfs_timespec atime;
740 struct btrfs_timespec ctime;
741 struct btrfs_timespec mtime;
742 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400743} __attribute__ ((__packed__));
744
Chris Masone02119d2008-09-05 16:13:11 -0400745struct btrfs_dir_log_item {
746 __le64 end;
747} __attribute__ ((__packed__));
748
Chris Mason62e27492007-03-15 12:56:47 -0400749struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400750 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400751 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500752 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400753 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400754 u8 type;
755} __attribute__ ((__packed__));
756
Li Zefanb83cc962010-12-20 16:04:08 +0800757#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
758
David Sterba521e0542014-04-15 16:41:44 +0200759/*
760 * Internal in-memory flag that a subvolume has been marked for deletion but
761 * still visible as a directory
762 */
763#define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
764
Chris Mason62e27492007-03-15 12:56:47 -0400765struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400766 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400767 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400768 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400769 __le64 bytenr;
770 __le64 byte_limit;
771 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400772 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500773 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400774 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400775 struct btrfs_disk_key drop_progress;
776 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400777 u8 level;
Alexander Block8ea05e32012-07-25 17:35:53 +0200778
779 /*
780 * The following fields appear after subvol_uuids+subvol_times
781 * were introduced.
782 */
783
784 /*
785 * This generation number is used to test if the new fields are valid
786 * and up to date while reading the root item. Everytime the root item
787 * is written out, the "generation" field is copied into this field. If
788 * anyone ever mounted the fs with an older kernel, we will have
789 * mismatching generation values here and thus must invalidate the
790 * new fields. See btrfs_update_root and btrfs_find_last_root for
791 * details.
792 * the offset of generation_v2 is also used as the start for the memset
793 * when invalidating the fields.
794 */
795 __le64 generation_v2;
796 u8 uuid[BTRFS_UUID_SIZE];
797 u8 parent_uuid[BTRFS_UUID_SIZE];
798 u8 received_uuid[BTRFS_UUID_SIZE];
799 __le64 ctransid; /* updated when an inode changes */
800 __le64 otransid; /* trans when created */
801 __le64 stransid; /* trans when sent. non-zero for received subvol */
802 __le64 rtransid; /* trans when received. non-zero for received subvol */
803 struct btrfs_timespec ctime;
804 struct btrfs_timespec otime;
805 struct btrfs_timespec stime;
806 struct btrfs_timespec rtime;
807 __le64 reserved[8]; /* for future */
Chris Mason9f5fae22007-03-20 14:38:32 -0400808} __attribute__ ((__packed__));
809
Chris Mason0660b5a2008-11-17 20:37:39 -0500810/*
811 * this is used for both forward and backward root refs
812 */
813struct btrfs_root_ref {
814 __le64 dirid;
815 __le64 sequence;
816 __le16 name_len;
817} __attribute__ ((__packed__));
818
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200819struct btrfs_disk_balance_args {
820 /*
821 * profiles to operate on, single is denoted by
822 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
823 */
824 __le64 profiles;
825
826 /* usage filter */
827 __le64 usage;
828
829 /* devid filter */
830 __le64 devid;
831
832 /* devid subset filter [pstart..pend) */
833 __le64 pstart;
834 __le64 pend;
835
836 /* btrfs virtual address space subset filter [vstart..vend) */
837 __le64 vstart;
838 __le64 vend;
839
840 /*
841 * profile to convert to, single is denoted by
842 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
843 */
844 __le64 target;
845
846 /* BTRFS_BALANCE_ARGS_* */
847 __le64 flags;
848
David Sterba7d824b62014-05-07 17:37:51 +0200849 /* BTRFS_BALANCE_ARGS_LIMIT value */
850 __le64 limit;
851
852 __le64 unused[7];
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200853} __attribute__ ((__packed__));
854
855/*
856 * store balance parameters to disk so that balance can be properly
857 * resumed after crash or unmount
858 */
859struct btrfs_balance_item {
860 /* BTRFS_BALANCE_* */
861 __le64 flags;
862
863 struct btrfs_disk_balance_args data;
864 struct btrfs_disk_balance_args meta;
865 struct btrfs_disk_balance_args sys;
866
867 __le64 unused[4];
868} __attribute__ ((__packed__));
869
Yan Zhengd899e052008-10-30 14:25:28 -0400870#define BTRFS_FILE_EXTENT_INLINE 0
871#define BTRFS_FILE_EXTENT_REG 1
872#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454df2007-04-19 13:37:44 -0400873
Chris Mason9f5fae22007-03-20 14:38:32 -0400874struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400875 /*
876 * transaction id that created this extent
877 */
Chris Mason71951f32007-03-27 09:16:29 -0400878 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400879 /*
880 * max number of bytes to hold this extent in ram
881 * when we split a compressed extent we can't know how big
882 * each of the resulting pieces will be. So, this is
883 * an upper limit on the size of the extent in ram instead of
884 * an exact limit.
885 */
886 __le64 ram_bytes;
887
888 /*
889 * 32 bits for the various ways we might encode the data,
890 * including compression and encryption. If any of these
891 * are set to something a given disk format doesn't understand
892 * it is treated like an incompat flag for reading and writing,
893 * but not for stat.
894 */
895 u8 compression;
896 u8 encryption;
897 __le16 other_encoding; /* spare for later use */
898
899 /* are we inline data or a real extent? */
Chris Mason236454df2007-04-19 13:37:44 -0400900 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400901
Chris Mason9f5fae22007-03-20 14:38:32 -0400902 /*
903 * disk space consumed by the extent, checksum blocks are included
904 * in these numbers
David Sterba7ec20af2014-07-24 17:34:58 +0200905 *
906 * At this offset in the structure, the inline extent data start.
Chris Mason9f5fae22007-03-20 14:38:32 -0400907 */
Chris Masondb945352007-10-15 16:15:53 -0400908 __le64 disk_bytenr;
909 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400910 /*
Chris Masondee26a92007-03-26 16:00:06 -0400911 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400912 * this extent record is for. This allows a file extent to point
913 * into the middle of an existing extent on disk, sharing it
914 * between two snapshots (useful if some bytes in the middle of the
915 * extent have changed
916 */
917 __le64 offset;
918 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400919 * the logical number of file blocks (no csums included). This
920 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400921 */
Chris Masondb945352007-10-15 16:15:53 -0400922 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400923
Chris Mason9f5fae22007-03-20 14:38:32 -0400924} __attribute__ ((__packed__));
925
Chris Masonf254e522007-03-29 15:15:27 -0400926struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400927 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400928} __attribute__ ((__packed__));
929
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200930struct btrfs_dev_stats_item {
931 /*
932 * grow this item struct at the end for future enhancements and keep
933 * the existing values unchanged
934 */
935 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
936} __attribute__ ((__packed__));
937
Stefan Behrense922e082012-11-05 17:26:40 +0100938#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
939#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
940#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
941#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
942#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
943#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
944#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
945
946struct btrfs_dev_replace {
947 u64 replace_state; /* see #define above */
948 u64 time_started; /* seconds since 1-Jan-1970 */
949 u64 time_stopped; /* seconds since 1-Jan-1970 */
950 atomic64_t num_write_errors;
951 atomic64_t num_uncorrectable_read_errors;
952
953 u64 cursor_left;
954 u64 committed_cursor_left;
955 u64 cursor_left_last_write_of_item;
956 u64 cursor_right;
957
958 u64 cont_reading_from_srcdev_mode; /* see #define above */
959
960 int is_valid;
961 int item_needs_writeback;
962 struct btrfs_device *srcdev;
963 struct btrfs_device *tgtdev;
964
965 pid_t lock_owner;
966 atomic_t nesting_level;
967 struct mutex lock_finishing_cancel_unmount;
968 struct mutex lock_management_lock;
969 struct mutex lock;
970
971 struct btrfs_scrub_progress scrub_progress;
972};
973
Stefan Behrensa2bff642012-11-05 17:32:20 +0100974struct btrfs_dev_replace_item {
975 /*
976 * grow this item struct at the end for future enhancements and keep
977 * the existing values unchanged
978 */
979 __le64 src_devid;
980 __le64 cursor_left;
981 __le64 cursor_right;
982 __le64 cont_reading_from_srcdev_mode;
983
984 __le64 replace_state;
985 __le64 time_started;
986 __le64 time_stopped;
987 __le64 num_write_errors;
988 __le64 num_uncorrectable_read_errors;
989} __attribute__ ((__packed__));
990
Chris Mason0b86a832008-03-24 15:01:56 -0400991/* different types of block groups (and chunks) */
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200992#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
993#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
994#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
995#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
996#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
997#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
998#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
Andreas Philipp1c89cdd2013-05-11 11:12:54 +0000999#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1000#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
David Sterba36523e952014-02-07 14:34:12 +01001001#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1002 BTRFS_SPACE_INFO_GLOBAL_RSV)
Miao Xiee6ec7162013-01-17 05:38:51 +00001003
1004enum btrfs_raid_types {
1005 BTRFS_RAID_RAID10,
1006 BTRFS_RAID_RAID1,
1007 BTRFS_RAID_DUP,
1008 BTRFS_RAID_RAID0,
1009 BTRFS_RAID_SINGLE,
Chris Masone942f882013-02-20 14:06:05 -05001010 BTRFS_RAID_RAID5,
1011 BTRFS_RAID_RAID6,
Miao Xiee6ec7162013-01-17 05:38:51 +00001012 BTRFS_NR_RAID_TYPES
1013};
Chris Mason1e2677e2007-05-29 16:52:18 -04001014
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001015#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1016 BTRFS_BLOCK_GROUP_SYSTEM | \
1017 BTRFS_BLOCK_GROUP_METADATA)
1018
1019#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1020 BTRFS_BLOCK_GROUP_RAID1 | \
David Woodhouse53b381b2013-01-29 18:40:14 -05001021 BTRFS_BLOCK_GROUP_RAID5 | \
1022 BTRFS_BLOCK_GROUP_RAID6 | \
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001023 BTRFS_BLOCK_GROUP_DUP | \
1024 BTRFS_BLOCK_GROUP_RAID10)
Zhao Leiffe2d202015-01-20 15:11:44 +08001025#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1026 BTRFS_BLOCK_GROUP_RAID6)
1027
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001028/*
1029 * We need a bit for restriper to be able to tell when chunks of type
1030 * SINGLE are available. This "extended" profile format is used in
1031 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1032 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1033 * to avoid remappings between two formats in future.
1034 */
1035#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1036
David Sterba36523e952014-02-07 14:34:12 +01001037/*
1038 * A fake block group type that is used to communicate global block reserve
1039 * size to userspace via the SPACE_INFO ioctl.
1040 */
1041#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1042
Ilya Dryomov899c81e2012-03-27 17:09:16 +03001043#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1044 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1045
1046static inline u64 chunk_to_extended(u64 flags)
1047{
1048 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1049 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1050
1051 return flags;
1052}
1053static inline u64 extended_to_chunk(u64 flags)
1054{
1055 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1056}
1057
Chris Mason9078a3e2007-04-26 16:46:15 -04001058struct btrfs_block_group_item {
1059 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -04001060 __le64 chunk_objectid;
1061 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -04001062} __attribute__ ((__packed__));
1063
Qu Wenruo8465ece2015-02-27 16:24:22 +08001064#define BTRFS_QGROUP_LEVEL_SHIFT 48
1065static inline u64 btrfs_qgroup_level(u64 qgroupid)
1066{
1067 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1068}
1069
Arne Jansen630dc772011-09-13 11:06:07 +02001070/*
1071 * is subvolume quota turned on?
1072 */
1073#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1074/*
Jan Schmidt2f232032013-04-25 16:04:51 +00001075 * RESCAN is set during the initialization phase
Arne Jansen630dc772011-09-13 11:06:07 +02001076 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001077#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
Arne Jansen630dc772011-09-13 11:06:07 +02001078/*
1079 * Some qgroup entries are known to be out of date,
1080 * either because the configuration has changed in a way that
1081 * makes a rescan necessary, or because the fs has been mounted
1082 * with a non-qgroup-aware version.
1083 * Turning qouta off and on again makes it inconsistent, too.
1084 */
1085#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1086
1087#define BTRFS_QGROUP_STATUS_VERSION 1
1088
1089struct btrfs_qgroup_status_item {
1090 __le64 version;
1091 /*
1092 * the generation is updated during every commit. As older
1093 * versions of btrfs are not aware of qgroups, it will be
1094 * possible to detect inconsistencies by checking the
1095 * generation on mount time
1096 */
1097 __le64 generation;
1098
1099 /* flag definitions see above */
1100 __le64 flags;
1101
1102 /*
1103 * only used during scanning to record the progress
1104 * of the scan. It contains a logical address
1105 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001106 __le64 rescan;
Arne Jansen630dc772011-09-13 11:06:07 +02001107} __attribute__ ((__packed__));
1108
1109struct btrfs_qgroup_info_item {
1110 __le64 generation;
1111 __le64 rfer;
1112 __le64 rfer_cmpr;
1113 __le64 excl;
1114 __le64 excl_cmpr;
1115} __attribute__ ((__packed__));
1116
1117/* flags definition for qgroup limits */
1118#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1119#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1120#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1121#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1122#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1123#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1124
1125struct btrfs_qgroup_limit_item {
1126 /*
1127 * only updated when any of the other values change
1128 */
1129 __le64 flags;
1130 __le64 max_rfer;
1131 __le64 max_excl;
1132 __le64 rsv_rfer;
1133 __le64 rsv_excl;
1134} __attribute__ ((__packed__));
1135
Jeff Mahoneyc1895442014-05-27 12:59:57 -04001136/* For raid type sysfs entries */
1137struct raid_kobject {
1138 int raid_type;
1139 struct kobject kobj;
1140};
1141
Chris Mason6324fbf2008-03-24 15:01:59 -04001142struct btrfs_space_info {
Miao Xie26b47ff2014-01-15 20:00:54 +08001143 spinlock_t lock;
Josef Bacik6a632092009-02-20 11:00:09 -05001144
Josef Bacik89a55892010-10-14 14:52:27 -04001145 u64 total_bytes; /* total bytes in the space,
1146 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001147 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -07001148 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -05001149 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1150 transaction finishes */
1151 u64 bytes_reserved; /* total bytes the allocator has reserved for
1152 current allocations */
Josef Bacik6a632092009-02-20 11:00:09 -05001153 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -04001154 delalloc/allocations */
Miao Xie26b47ff2014-01-15 20:00:54 +08001155 u64 bytes_readonly; /* total bytes that are read only */
1156
1157 unsigned int full:1; /* indicates that we cannot allocate any more
1158 chunks for this space */
1159 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1160
1161 unsigned int flush:1; /* set if we are trying to make space */
1162
1163 unsigned int force_alloc; /* set if we need to force a chunk
1164 alloc for this space */
1165
Yan, Zhengb742bb82010-05-16 10:46:24 -04001166 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -04001167 u64 disk_total; /* total bytes on disk, takes mirrors into
1168 account */
Josef Bacik6a632092009-02-20 11:00:09 -05001169
Miao Xie26b47ff2014-01-15 20:00:54 +08001170 u64 flags;
1171
Chris Mason36e39c42011-03-12 07:08:42 -05001172 /*
Josef Bacikb150a4f2013-06-19 15:00:04 -04001173 * bytes_pinned is kept in line with what is actually pinned, as in
1174 * we've called update_block_group and dropped the bytes_used counter
1175 * and increased the bytes_pinned counter. However this means that
1176 * bytes_pinned does not reflect the bytes that will be pinned once the
1177 * delayed refs are flushed, so this counter is inc'ed everytime we call
1178 * btrfs_free_extent so it is a realtime count of what will be freed
1179 * once the transaction is committed. It will be zero'ed everytime the
1180 * transaction commits.
1181 */
1182 struct percpu_counter total_bytes_pinned;
1183
Chris Mason6324fbf2008-03-24 15:01:59 -04001184 struct list_head list;
Filipe Manana75c68e92015-01-16 13:24:40 +00001185 /* Protected by the spinlock 'lock'. */
Josef Bacik633c0aa2014-10-31 09:49:34 -04001186 struct list_head ro_bgs;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001187
Miao Xie26b47ff2014-01-15 20:00:54 +08001188 struct rw_semaphore groups_sem;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001189 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001190 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacikfdb5eff2011-06-07 16:07:44 -04001191 wait_queue_head_t wait;
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001192
1193 struct kobject kobj;
Jeff Mahoneyc1895442014-05-27 12:59:57 -04001194 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -04001195};
1196
Miao Xie66d8f3d2012-09-06 04:02:28 -06001197#define BTRFS_BLOCK_RSV_GLOBAL 1
1198#define BTRFS_BLOCK_RSV_DELALLOC 2
1199#define BTRFS_BLOCK_RSV_TRANS 3
1200#define BTRFS_BLOCK_RSV_CHUNK 4
1201#define BTRFS_BLOCK_RSV_DELOPS 5
1202#define BTRFS_BLOCK_RSV_EMPTY 6
1203#define BTRFS_BLOCK_RSV_TEMP 7
1204
Yan, Zhengf0486c62010-05-16 10:46:25 -04001205struct btrfs_block_rsv {
1206 u64 size;
1207 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001208 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001209 spinlock_t lock;
Miao Xie66d8f3d2012-09-06 04:02:28 -06001210 unsigned short full;
1211 unsigned short type;
1212 unsigned short failfast;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001213};
1214
Chris Masonfa9c0d792009-04-03 09:47:43 -04001215/*
1216 * free clusters are used to claim free space in relatively large chunks,
1217 * allowing us to do less seeky writes. They are used for all metadata
1218 * allocations and data allocations in ssd mode.
1219 */
1220struct btrfs_free_cluster {
1221 spinlock_t lock;
1222 spinlock_t refill_lock;
1223 struct rb_root root;
1224
1225 /* largest extent in this cluster */
1226 u64 max_size;
1227
1228 /* first extent starting offset */
1229 u64 window_start;
1230
1231 struct btrfs_block_group_cache *block_group;
1232 /*
1233 * when a cluster is allocated from a block group, we put the
1234 * cluster onto a list in the block group so that it can
1235 * be freed before the block group is freed.
1236 */
1237 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -04001238};
1239
Josef Bacik817d52f2009-07-13 21:29:25 -04001240enum btrfs_caching_type {
1241 BTRFS_CACHE_NO = 0,
1242 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -05001243 BTRFS_CACHE_FAST = 2,
1244 BTRFS_CACHE_FINISHED = 3,
Josef Bacik36cce922013-08-05 11:15:21 -04001245 BTRFS_CACHE_ERROR = 4,
Josef Bacik817d52f2009-07-13 21:29:25 -04001246};
1247
Josef Bacik0af3d002010-06-21 14:48:16 -04001248enum btrfs_disk_cache_state {
1249 BTRFS_DC_WRITTEN = 0,
1250 BTRFS_DC_ERROR = 1,
1251 BTRFS_DC_CLEAR = 2,
1252 BTRFS_DC_SETUP = 3,
Josef Bacik0af3d002010-06-21 14:48:16 -04001253};
1254
Yan Zheng11833d62009-09-11 16:11:19 -04001255struct btrfs_caching_control {
1256 struct list_head list;
1257 struct mutex mutex;
1258 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001259 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -04001260 struct btrfs_block_group_cache *block_group;
1261 u64 progress;
1262 atomic_t count;
1263};
1264
Chris Mason4c6d1d82015-04-06 13:17:20 -07001265struct btrfs_io_ctl {
1266 void *cur, *orig;
1267 struct page *page;
1268 struct page **pages;
1269 struct btrfs_root *root;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001270 struct inode *inode;
Chris Mason4c6d1d82015-04-06 13:17:20 -07001271 unsigned long size;
1272 int index;
1273 int num_pages;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001274 int entries;
1275 int bitmaps;
Chris Mason4c6d1d82015-04-06 13:17:20 -07001276 unsigned check_crcs:1;
1277};
1278
Chris Mason9078a3e2007-04-26 16:46:15 -04001279struct btrfs_block_group_cache {
1280 struct btrfs_key key;
1281 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -04001282 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -04001283 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -04001284 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -05001285 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -04001286 u64 reserved;
Miao Xiee570fd22014-06-19 10:42:50 +08001287 u64 delalloc_bytes;
Josef Bacik1b2da372009-09-11 16:11:20 -04001288 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -04001289 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -04001290 u64 sectorsize;
Josef Bacik5b0e95b2011-10-06 08:58:24 -04001291 u64 cache_generation;
David Woodhouse53b381b2013-01-29 18:40:14 -05001292
Miao Xiee570fd22014-06-19 10:42:50 +08001293 /*
1294 * It is just used for the delayed data space allocation because
1295 * only the data space allocation and the relative metadata update
1296 * can be done cross the transaction.
1297 */
1298 struct rw_semaphore data_rwsem;
1299
David Woodhouse53b381b2013-01-29 18:40:14 -05001300 /* for raid56, this is a full stripe, without parity */
1301 unsigned long full_stripe_len;
1302
Zhaolei868f4012015-08-05 16:43:27 +08001303 unsigned int ro;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +00001304 unsigned int iref:1;
Filipe Manana4f69cb92014-11-26 15:28:51 +00001305 unsigned int has_caching_ctl:1;
Filipe Manana04216822014-11-27 21:14:15 +00001306 unsigned int removed:1;
Josef Bacik0af3d002010-06-21 14:48:16 -04001307
1308 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001309
Josef Bacik817d52f2009-07-13 21:29:25 -04001310 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -04001311 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -04001312 struct btrfs_caching_control *caching_ctl;
1313 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -04001314
Josef Bacik0f9dd462008-09-23 13:14:11 -04001315 struct btrfs_space_info *space_info;
1316
1317 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +08001318 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001319
1320 /* block group cache stuff */
1321 struct rb_node cache_node;
1322
1323 /* for block groups in the same raid type */
1324 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -05001325
1326 /* usage count */
1327 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -04001328
1329 /* List of struct btrfs_free_clusters for this block group.
1330 * Today it will only have one thing on it, but that may change
1331 */
1332 struct list_head cluster_list;
Josef Bacikea658ba2012-09-11 16:57:25 -04001333
Josef Bacik47ab2a62014-09-18 11:20:02 -04001334 /* For delayed block group creation or deletion of empty block groups */
1335 struct list_head bg_list;
Josef Bacik633c0aa2014-10-31 09:49:34 -04001336
1337 /* For read-only block groups */
1338 struct list_head ro_list;
Filipe Manana04216822014-11-27 21:14:15 +00001339
1340 atomic_t trimming;
Josef Bacikce93ec52014-11-17 15:45:48 -05001341
1342 /* For dirty block groups */
1343 struct list_head dirty_list;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001344 struct list_head io_list;
1345
1346 struct btrfs_io_ctl io_ctl;
Chris Mason9078a3e2007-04-26 16:46:15 -04001347};
Chris Mason0b86a832008-03-24 15:01:56 -04001348
Jan Schmidt097b8a72012-06-21 11:08:04 +02001349/* delayed seq elem */
1350struct seq_list {
1351 struct list_head list;
1352 u64 seq;
1353};
1354
David Sterba3284da72015-02-25 15:47:32 +01001355#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1356
Josef Bacik5d803662013-02-07 16:06:02 -05001357enum btrfs_orphan_cleanup_state {
1358 ORPHAN_CLEANUP_STARTED = 1,
1359 ORPHAN_CLEANUP_DONE = 2,
1360};
1361
David Woodhouse53b381b2013-01-29 18:40:14 -05001362/* used by the raid56 code to lock stripes for read/modify/write */
1363struct btrfs_stripe_hash {
1364 struct list_head hash_list;
1365 wait_queue_head_t wait;
1366 spinlock_t lock;
1367};
1368
1369/* used by the raid56 code to lock stripes for read/modify/write */
1370struct btrfs_stripe_hash_table {
Chris Mason4ae10b32013-01-31 14:42:09 -05001371 struct list_head stripe_cache;
1372 spinlock_t cache_lock;
1373 int cache_size;
1374 struct btrfs_stripe_hash table[];
David Woodhouse53b381b2013-01-29 18:40:14 -05001375};
1376
1377#define BTRFS_STRIPE_HASH_TABLE_BITS 11
1378
Miao Xie21c7e752014-05-13 17:29:04 -07001379void btrfs_init_async_reclaim_work(struct work_struct *work);
1380
Jan Schmidt097b8a72012-06-21 11:08:04 +02001381/* fs_info */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001382struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -04001383struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -04001384struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001385struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +08001386struct btrfs_delayed_root;
Chris Mason9f5fae22007-03-20 14:38:32 -04001387struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -04001388 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -04001389 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -04001390 struct btrfs_root *extent_root;
1391 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -04001392 struct btrfs_root *chunk_root;
1393 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -05001394 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -05001395 struct btrfs_root *csum_root;
Arne Jansen416ac512011-09-13 12:56:09 +02001396 struct btrfs_root *quota_root;
Stefan Behrensf7a81ea2013-08-15 17:11:19 +02001397 struct btrfs_root *uuid_root;
Chris Masone02119d2008-09-05 16:13:11 -04001398
1399 /* the log root tree is a directory of all the other log roots */
1400 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001401
1402 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -04001403 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -04001404
Josef Bacik0f9dd462008-09-23 13:14:11 -04001405 /* block group cache stuff */
1406 spinlock_t block_group_cache_lock;
Liu Boa1897fd2012-12-27 09:01:23 +00001407 u64 first_logical_byte;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001408 struct rb_root block_group_cache_tree;
1409
Josef Bacik2bf64752011-09-26 17:12:22 -04001410 /* keep track of unallocated space */
1411 spinlock_t free_chunk_lock;
1412 u64 free_chunk_space;
1413
Yan Zheng11833d62009-09-11 16:11:19 -04001414 struct extent_io_tree freed_extents[2];
1415 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -04001416
Chris Mason0b86a832008-03-24 15:01:56 -04001417 /* logical->physical extent mapping */
1418 struct btrfs_mapping_tree mapping_tree;
1419
Miao Xie16cdcec2011-04-22 18:12:22 +08001420 /*
1421 * block reservation for extent, checksum, root tree and
1422 * delayed dir index item
1423 */
Yan, Zhengf0486c62010-05-16 10:46:25 -04001424 struct btrfs_block_rsv global_block_rsv;
1425 /* block reservation for delay allocation */
1426 struct btrfs_block_rsv delalloc_block_rsv;
1427 /* block reservation for metadata operations */
1428 struct btrfs_block_rsv trans_block_rsv;
1429 /* block reservation for chunk tree */
1430 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -04001431 /* block reservation for delayed operations */
1432 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001433
1434 struct btrfs_block_rsv empty_block_rsv;
1435
Chris Mason293ffd52007-03-20 15:57:25 -04001436 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -04001437 u64 last_trans_committed;
Josef Bacik0a2b2a82014-01-23 10:54:11 -05001438 u64 avg_delayed_ref_runtime;
Chris Mason12fcfd22009-03-24 10:24:20 -04001439
1440 /*
1441 * this is updated to the current trans every time a full commit
1442 * is required instead of the faster short fsync log commits
1443 */
1444 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +02001445 unsigned long mount_opt;
David Sterba572d9ab2014-02-05 15:26:17 +01001446 /*
1447 * Track requests for actions that need to be done during transaction
1448 * commit (like for some mount options).
1449 */
1450 unsigned long pending_changes;
Li Zefan261507a02010-12-17 14:21:50 +08001451 unsigned long compress_type:4;
David Sterba8b87dc12013-08-01 18:14:52 +02001452 int commit_interval;
Miao Xie8c6a3ee2013-01-29 10:05:05 +00001453 /*
1454 * It is a suggestive number, the read side is safe even it gets a
1455 * wrong number because we will write out the data into a regular
1456 * extent. The write side(mount/remount) is under ->s_umount lock,
1457 * so it is also safe.
1458 */
Chris Mason6f568d32008-01-29 16:03:38 -05001459 u64 max_inline;
Miao Xiec018dae2013-01-29 10:07:33 +00001460 /*
1461 * Protected by ->chunk_mutex and sb->s_umount.
1462 *
1463 * The reason that we use two lock to protect it is because only
1464 * remount and mount operations can change it and these two operations
1465 * are under sb->s_umount, but the read side (chunk allocation) can not
1466 * acquire sb->s_umount or the deadlock would happen. So we use two
1467 * locks to protect it. On the write side, we must acquire two locks,
1468 * and on the read side, we just need acquire one of them.
1469 */
Chris Mason8f662a72008-01-02 10:01:11 -05001470 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -04001471 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001472 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -04001473 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -04001474 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -05001475 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -04001476
Miao Xieceda0862013-04-11 10:30:16 +00001477 /*
1478 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1479 * when they are updated.
1480 *
1481 * Because we do not clear the flags for ever, so we needn't use
1482 * the lock on the read side.
1483 *
1484 * We also needn't use the lock when we mount the fs, because
1485 * there is no other task which will update the flag.
1486 */
1487 spinlock_t super_lock;
David Sterba6c417612011-04-13 15:41:04 +02001488 struct btrfs_super_block *super_copy;
1489 struct btrfs_super_block *super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -04001490 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -04001491 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -04001492 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -04001493 struct backing_dev_info bdi;
Chris Masone02119d2008-09-05 16:13:11 -04001494 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -04001495 struct mutex transaction_kthread_mutex;
1496 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -04001497 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -04001498 struct mutex volume_mutex;
David Woodhouse53b381b2013-01-29 18:40:14 -05001499
Chris Mason1bbc6212015-04-06 12:46:08 -07001500 /*
1501 * this is taken to make sure we don't set block groups ro after
1502 * the free space cache has been allocated on them
1503 */
1504 struct mutex ro_block_group_mutex;
1505
David Woodhouse53b381b2013-01-29 18:40:14 -05001506 /* this is used during read/modify/write to make sure
1507 * no two ios are trying to mod the same stripe at the same
1508 * time
1509 */
1510 struct btrfs_stripe_hash_table *stripe_hash_table;
1511
Chris Mason5a3f23d2009-03-31 13:27:11 -04001512 /*
1513 * this protects the ordered operations list only while we are
1514 * processing all of the entries on it. This way we make
1515 * sure the commit code doesn't find the list temporarily empty
1516 * because another function happens to be doing non-waiting preflush
1517 * before jumping into the main commit.
1518 */
1519 struct mutex ordered_operations_mutex;
Josef Bacik9ffba8c2013-08-14 11:33:56 -04001520
Josef Bacik9e351cc2014-03-13 15:42:13 -04001521 struct rw_semaphore commit_root_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001522
Yan, Zhengc71bf092009-11-12 09:34:40 +00001523 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001524
Yan, Zhengc71bf092009-11-12 09:34:40 +00001525 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001526 struct srcu_struct subvol_srcu;
1527
Josef Bacika4abeea2011-04-11 17:25:13 -04001528 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -04001529 /*
1530 * the reloc mutex goes with the trans lock, it is taken
1531 * during commit to protect us from the relocation code
1532 */
1533 struct mutex reloc_mutex;
1534
Chris Mason8fd17792007-04-19 21:01:03 -04001535 struct list_head trans_list;
Chris Masonfacda1e2007-06-08 18:11:48 -04001536 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -04001537 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -04001538
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001539 spinlock_t delayed_iput_lock;
1540 struct list_head delayed_iputs;
Zhao Leid7c15172015-02-26 10:49:20 +08001541 struct rw_semaphore delayed_iput_sem;
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001542
Jan Schmidtf29021b2012-05-16 17:55:38 +02001543 /* this protects tree_mod_seq_list */
1544 spinlock_t tree_mod_seq_lock;
Jan Schmidtfc36ed7e2013-04-24 16:57:33 +00001545 atomic64_t tree_mod_seq;
Jan Schmidtf29021b2012-05-16 17:55:38 +02001546 struct list_head tree_mod_seq_list;
1547
1548 /* this protects tree_mod_log */
1549 rwlock_t tree_mod_log_lock;
1550 struct rb_root tree_mod_log;
1551
Chris Masoncb03c742008-05-15 16:15:45 -04001552 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -04001553 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -04001554 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -05001555 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -04001556 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -04001557
Chris Mason8b712842008-06-11 16:50:36 -04001558 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001559 * this is used to protect the following list -- ordered_roots.
Chris Mason3eaa2882008-07-24 11:57:52 -04001560 */
Miao Xie199c2a92013-05-15 07:48:23 +00001561 spinlock_t ordered_root_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001562
1563 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001564 * all fs/file tree roots in which there are data=ordered extents
1565 * pending writeback are added into this list.
1566 *
Chris Mason5a3f23d2009-03-31 13:27:11 -04001567 * these can span multiple transactions and basically include
1568 * every dirty data page that isn't from nodatacow
1569 */
Miao Xie199c2a92013-05-15 07:48:23 +00001570 struct list_head ordered_roots;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001571
Miao Xie573bfb72014-03-06 13:55:03 +08001572 struct mutex delalloc_root_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001573 spinlock_t delalloc_root_lock;
1574 /* all fs/file tree roots that have delalloc inodes. */
1575 struct list_head delalloc_roots;
Chris Mason3eaa2882008-07-24 11:57:52 -04001576
1577 /*
Chris Mason8b712842008-06-11 16:50:36 -04001578 * there is a pool of worker threads for checksumming during writes
1579 * and a pool for checksumming after reads. This is because readers
1580 * can run with FS locks held, and the writers may be waiting for
1581 * those locks. We don't want ordering in the pending list to cause
1582 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -04001583 *
1584 * A third pool does submit_bio to avoid deadlocking with the other
1585 * two
Chris Mason8b712842008-06-11 16:50:36 -04001586 */
Qu Wenruod458b052014-02-28 10:46:19 +08001587 struct btrfs_workqueue *workers;
1588 struct btrfs_workqueue *delalloc_workers;
1589 struct btrfs_workqueue *flush_workers;
1590 struct btrfs_workqueue *endio_workers;
1591 struct btrfs_workqueue *endio_meta_workers;
1592 struct btrfs_workqueue *endio_raid56_workers;
Miao Xie8b110e32014-09-12 18:44:03 +08001593 struct btrfs_workqueue *endio_repair_workers;
Qu Wenruod458b052014-02-28 10:46:19 +08001594 struct btrfs_workqueue *rmw_workers;
1595 struct btrfs_workqueue *endio_meta_write_workers;
1596 struct btrfs_workqueue *endio_write_workers;
1597 struct btrfs_workqueue *endio_freespace_worker;
1598 struct btrfs_workqueue *submit_workers;
1599 struct btrfs_workqueue *caching_workers;
1600 struct btrfs_workqueue *readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001601
Chris Mason247e7432008-07-17 12:53:51 -04001602 /*
1603 * fixup workers take dirty pages that didn't properly go through
1604 * the cow mechanism and make them safe to write. It happens
1605 * for the sys_munmap function call path
1606 */
Qu Wenruod458b052014-02-28 10:46:19 +08001607 struct btrfs_workqueue *fixup_workers;
1608 struct btrfs_workqueue *delayed_workers;
Chris Masona79b7d42014-05-22 16:18:52 -07001609
1610 /* the extent workers do delayed refs on the extent allocation tree */
1611 struct btrfs_workqueue *extent_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001612 struct task_struct *transaction_kthread;
1613 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001614 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001615
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001616 struct kobject *space_info_kobj;
Chris Masone66f7092007-04-20 13:16:02 -04001617 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001618 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001619 int log_root_recovering;
Josef Bacik47ab2a62014-09-18 11:20:02 -04001620 int open;
Chris Mason62e27492007-03-15 12:56:47 -04001621
Yan324ae4d2007-11-16 14:57:08 -05001622 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001623
Miao Xiee2d84522013-01-29 10:09:20 +00001624 /* used to keep from writing metadata until there is a nice batch */
1625 struct percpu_counter dirty_metadata_bytes;
Miao Xie963d6782013-01-29 10:10:51 +00001626 struct percpu_counter delalloc_bytes;
Miao Xiee2d84522013-01-29 10:09:20 +00001627 s32 dirty_metadata_batch;
Miao Xie963d6782013-01-29 10:10:51 +00001628 s32 delalloc_batch;
1629
Chris Mason0b86a832008-03-24 15:01:56 -04001630 struct list_head dirty_cowonly_roots;
1631
Chris Mason8a4b83c2008-03-24 15:02:07 -04001632 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001633
1634 /*
1635 * the space_info list is almost entirely read only. It only changes
1636 * when we add a new raid type to the FS, and that happens
1637 * very rarely. RCU is used to protect it.
1638 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001639 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001640
Li Zefanb4d7c3c2012-07-09 20:21:07 -06001641 struct btrfs_space_info *data_sinfo;
1642
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001643 struct reloc_control *reloc_ctl;
1644
Chris Masonfa9c0d792009-04-03 09:47:43 -04001645 /* data_alloc_cluster is only used in ssd mode */
1646 struct btrfs_free_cluster data_alloc_cluster;
1647
1648 /* all metadata allocations go through this cluster */
1649 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001650
Chris Mason4cb53002011-05-24 15:35:30 -04001651 /* auto defrag inodes go here */
1652 spinlock_t defrag_inodes_lock;
1653 struct rb_root defrag_inodes;
1654 atomic_t defrag_running;
1655
Miao Xiede98ced2013-01-29 10:13:12 +00001656 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1657 seqlock_t profiles_lock;
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001658 /*
1659 * these three are in extended format (availability of single
1660 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1661 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1662 */
Chris Masond18a2c42008-04-04 15:40:00 -04001663 u64 avail_data_alloc_bits;
1664 u64 avail_metadata_alloc_bits;
1665 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -04001666
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001667 /* restriper state */
1668 spinlock_t balance_lock;
1669 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001670 atomic_t balance_running;
1671 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +02001672 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001673 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001674 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001675
Josef Bacik97e728d2009-04-21 17:40:57 -04001676 unsigned data_chunk_allocations;
1677 unsigned metadata_ratio;
1678
Chris Mason788f20e2008-04-28 15:29:42 -04001679 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001680
Arne Jansena2de7332011-03-08 14:14:00 +01001681 /* private scrub information */
1682 struct mutex scrub_lock;
1683 atomic_t scrubs_running;
1684 atomic_t scrub_pause_req;
1685 atomic_t scrubs_paused;
1686 atomic_t scrub_cancel_req;
1687 wait_queue_head_t scrub_pause_wait;
Arne Jansena2de7332011-03-08 14:14:00 +01001688 int scrub_workers_refcnt;
Qu Wenruod458b052014-02-28 10:46:19 +08001689 struct btrfs_workqueue *scrub_workers;
1690 struct btrfs_workqueue *scrub_wr_completion_workers;
1691 struct btrfs_workqueue *scrub_nocow_workers;
Zhao Lei20b2e302015-06-04 20:09:15 +08001692 struct btrfs_workqueue *scrub_parity_workers;
Arne Jansena2de7332011-03-08 14:14:00 +01001693
Stefan Behrens21adbd52011-11-09 13:44:05 +01001694#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1695 u32 check_integrity_print_mask;
1696#endif
Arne Jansen416ac512011-09-13 12:56:09 +02001697 /*
1698 * quota information
1699 */
1700 unsigned int quota_enabled:1;
1701
1702 /*
1703 * quota_enabled only changes state after a commit. This holds the
1704 * next state.
1705 */
1706 unsigned int pending_quota_state:1;
1707
1708 /* is qgroup tracking in a consistent state? */
1709 u64 qgroup_flags;
1710
1711 /* holds configuration and tracking. Protected by qgroup_lock */
1712 struct rb_root qgroup_tree;
Josef Bacikfcebe452014-05-13 17:30:47 -07001713 struct rb_root qgroup_op_tree;
Arne Jansen416ac512011-09-13 12:56:09 +02001714 spinlock_t qgroup_lock;
Josef Bacikfcebe452014-05-13 17:30:47 -07001715 spinlock_t qgroup_op_lock;
1716 atomic_t qgroup_op_seq;
Arne Jansen416ac512011-09-13 12:56:09 +02001717
Wang Shilong1e8f9152013-05-06 11:03:27 +00001718 /*
1719 * used to avoid frequently calling ulist_alloc()/ulist_free()
1720 * when doing qgroup accounting, it must be protected by qgroup_lock.
1721 */
1722 struct ulist *qgroup_ulist;
1723
Wang Shilongf2f6ed32013-04-07 10:50:16 +00001724 /* protect user change for quota operations */
1725 struct mutex qgroup_ioctl_lock;
1726
Arne Jansen416ac512011-09-13 12:56:09 +02001727 /* list of dirty qgroups to be written at next commit */
1728 struct list_head dirty_qgroups;
1729
Qu Wenruoe69bcee2015-04-17 10:23:16 +08001730 /* used by qgroup for an efficient tree traversal */
Arne Jansen416ac512011-09-13 12:56:09 +02001731 u64 qgroup_seq;
Stefan Behrens21adbd52011-11-09 13:44:05 +01001732
Jan Schmidt2f232032013-04-25 16:04:51 +00001733 /* qgroup rescan items */
1734 struct mutex qgroup_rescan_lock; /* protects the progress item */
1735 struct btrfs_key qgroup_rescan_progress;
Qu Wenruod458b052014-02-28 10:46:19 +08001736 struct btrfs_workqueue *qgroup_rescan_workers;
Jan Schmidt57254b6e2013-05-06 19:14:17 +00001737 struct completion qgroup_rescan_completion;
Jan Schmidtb382a322013-05-28 15:47:24 +00001738 struct btrfs_work qgroup_rescan_work;
Jan Schmidt2f232032013-04-25 16:04:51 +00001739
liuboacce9522011-01-06 19:30:25 +08001740 /* filesystem state */
Miao Xie87533c42013-01-29 10:14:48 +00001741 unsigned long fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001742
1743 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001744
Arne Jansen90519d62011-05-23 14:30:00 +02001745 /* readahead tree */
1746 spinlock_t reada_lock;
1747 struct radix_tree_root reada_tree;
Chris Mason531f4b1a2011-11-06 03:05:08 -05001748
Josef Bacikf28491e2013-12-16 13:24:27 -05001749 /* Extent buffer radix tree */
1750 spinlock_t buffer_lock;
1751 struct radix_tree_root buffer_radix;
1752
Chris Masonaf31f5e2011-11-03 15:17:42 -04001753 /* next backup root to be overwritten */
1754 int backup_root_index;
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02001755
1756 int num_tolerated_disk_barrier_failures;
Stefan Behrense922e082012-11-05 17:26:40 +01001757
1758 /* device replace state */
1759 struct btrfs_dev_replace dev_replace;
Stefan Behrens5ac00ad2012-11-05 17:54:08 +01001760
1761 atomic_t mutually_exclusive_operation_running;
Stefan Behrens803b2f52013-08-15 17:11:21 +02001762
Miao Xiec404e0d2014-01-30 16:46:55 +08001763 struct percpu_counter bio_counter;
1764 wait_queue_head_t replace_wait;
1765
Stefan Behrens803b2f52013-08-15 17:11:21 +02001766 struct semaphore uuid_tree_rescan_sem;
Stefan Behrens70f80172013-08-15 17:11:23 +02001767 unsigned int update_uuid_tree_gen:1;
Miao Xie21c7e752014-05-13 17:29:04 -07001768
1769 /* Used to reclaim the metadata space in the background. */
1770 struct work_struct async_reclaim_work;
Josef Bacik47ab2a62014-09-18 11:20:02 -04001771
1772 spinlock_t unused_bgs_lock;
1773 struct list_head unused_bgs;
Filipe Mananad4b450c2015-01-29 19:18:25 +00001774 struct mutex unused_bg_unpin_mutex;
Filipe Manana67c5e7d2015-06-11 00:58:53 +01001775 struct mutex delete_unused_bgs_mutex;
Qu Wenruof667aef2014-09-23 13:40:08 +08001776
1777 /* For btrfs to record security options */
1778 struct security_mnt_opts security_opts;
Filipe Manana04216822014-11-27 21:14:15 +00001779
1780 /*
1781 * Chunks that can't be freed yet (under a trim/discard operation)
1782 * and will be latter freed. Protected by fs_info->chunk_mutex.
1783 */
1784 struct list_head pinned_chunks;
Yan324ae4d2007-11-16 14:57:08 -05001785};
Chris Mason0b86a832008-03-24 15:01:56 -04001786
Miao Xie8257b2d2014-03-06 13:38:19 +08001787struct btrfs_subvolume_writers {
1788 struct percpu_counter counter;
1789 wait_queue_head_t wait;
1790};
1791
Chris Mason62e27492007-03-15 12:56:47 -04001792/*
Miao Xie27cdeb72014-04-02 19:51:05 +08001793 * The state of btrfs root
1794 */
1795/*
1796 * btrfs_record_root_in_trans is a multi-step process,
1797 * and it can race with the balancing code. But the
1798 * race is very small, and only the first time the root
1799 * is added to each transaction. So IN_TRANS_SETUP
1800 * is used to tell us when more checks are required
1801 */
1802#define BTRFS_ROOT_IN_TRANS_SETUP 0
1803#define BTRFS_ROOT_REF_COWS 1
1804#define BTRFS_ROOT_TRACK_DIRTY 2
1805#define BTRFS_ROOT_IN_RADIX 3
1806#define BTRFS_ROOT_DUMMY_ROOT 4
1807#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1808#define BTRFS_ROOT_DEFRAG_RUNNING 6
1809#define BTRFS_ROOT_FORCE_COW 7
1810#define BTRFS_ROOT_MULTI_LOG_TASKS 8
Josef Bacike7070be2014-12-16 08:54:43 -08001811#define BTRFS_ROOT_DIRTY 9
Miao Xie27cdeb72014-04-02 19:51:05 +08001812
1813/*
Chris Mason62e27492007-03-15 12:56:47 -04001814 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001815 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001816 */
1817struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001818 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001819
Chris Mason5f39d392007-10-15 16:14:19 -04001820 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001821 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001822 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001823
Miao Xie27cdeb72014-04-02 19:51:05 +08001824 unsigned long state;
Chris Mason62e27492007-03-15 12:56:47 -04001825 struct btrfs_root_item root_item;
1826 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001827 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001828 struct extent_io_tree dirty_log_pages;
1829
Chris Masona2135012008-06-25 16:01:30 -04001830 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001831
Yan, Zhengf0486c62010-05-16 10:46:25 -04001832 spinlock_t accounting_lock;
1833 struct btrfs_block_rsv *block_rsv;
1834
Li Zefan581bb052011-04-20 10:06:11 +08001835 /* free ino cache stuff */
Li Zefan581bb052011-04-20 10:06:11 +08001836 struct btrfs_free_space_ctl *free_ino_ctl;
David Sterba57cdc8d2014-02-05 02:37:48 +01001837 enum btrfs_caching_type ino_cache_state;
1838 spinlock_t ino_cache_lock;
1839 wait_queue_head_t ino_cache_wait;
Li Zefan581bb052011-04-20 10:06:11 +08001840 struct btrfs_free_space_ctl *free_ino_pinned;
David Sterba57cdc8d2014-02-05 02:37:48 +01001841 u64 ino_cache_progress;
1842 struct inode *ino_cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001843
Chris Masone02119d2008-09-05 16:13:11 -04001844 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001845 wait_queue_head_t log_writer_wait;
1846 wait_queue_head_t log_commit_wait[2];
Miao Xie8b050d32014-02-20 18:08:58 +08001847 struct list_head log_ctxs[2];
Yan Zheng7237f182009-01-21 12:54:03 -05001848 atomic_t log_writers;
1849 atomic_t log_commit[2];
Miao Xie2ecb7922012-09-06 04:04:27 -06001850 atomic_t log_batch;
Miao Xiebb14a592014-02-20 18:08:56 +08001851 int log_transid;
Miao Xied1433de2014-02-20 18:08:59 +08001852 /* No matter the commit succeeds or not*/
1853 int log_transid_committed;
1854 /* Just be updated when the commit succeeds. */
Miao Xiebb14a592014-02-20 18:08:56 +08001855 int last_log_commit;
Josef Bacikff782e02009-10-08 15:30:04 -04001856 pid_t log_start_pid;
Chris Masonea8c2812008-08-04 23:17:27 -04001857
Chris Mason0f7d52f2007-04-09 10:42:37 -04001858 u64 objectid;
1859 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001860
1861 /* data allocations are done in sectorsize units */
1862 u32 sectorsize;
1863
1864 /* node allocations are done in nodesize units */
1865 u32 nodesize;
1866
Chris Mason87ee04e2007-11-30 11:30:34 -05001867 u32 stripesize;
1868
Chris Mason9f5fae22007-03-20 14:38:32 -04001869 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001870
1871 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001872
Chris Mason0d4cf4e2014-10-07 13:24:20 -07001873 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001874 u64 alloc_bytenr;
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001875
Chris Mason3f157a22008-06-25 16:01:31 -04001876 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001877 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001878 struct btrfs_key defrag_max;
Josef Bacik58176a92007-08-29 15:47:34 -04001879 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001880
1881 /* the dirty list is only used by non-reference counted roots */
1882 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001883
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001884 struct list_head root_list;
1885
Josef Bacik2ab28f32012-10-12 15:27:49 -04001886 spinlock_t log_extents_lock[2];
1887 struct list_head logged_list[2];
1888
Yan, Zhengd68fc572010-05-16 10:49:58 -04001889 spinlock_t orphan_lock;
Josef Bacik8a35d952012-05-23 14:26:42 -04001890 atomic_t orphan_inodes;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001891 struct btrfs_block_rsv *orphan_block_rsv;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001892 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001893
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001894 spinlock_t inode_lock;
1895 /* red-black tree that keeps track of in-memory inodes */
1896 struct rb_root inode_tree;
1897
Chris Mason3394e162008-11-17 20:42:26 -05001898 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001899 * radix tree that keeps track of delayed nodes of every inode,
1900 * protected by inode_lock
1901 */
1902 struct radix_tree_root delayed_nodes_tree;
1903 /*
Chris Mason3394e162008-11-17 20:42:26 -05001904 * right now this just gets used so that a root has its own devid
1905 * for stat. It may be used for more later
1906 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001907 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001908
Anand Jain5f3ab902012-12-07 09:28:54 +00001909 spinlock_t root_item_lock;
Miao Xieb0feb9d2013-05-15 07:48:20 +00001910 atomic_t refs;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001911
Miao Xie573bfb72014-03-06 13:55:03 +08001912 struct mutex delalloc_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001913 spinlock_t delalloc_lock;
1914 /*
1915 * all of the inodes that have delalloc bytes. It is possible for
1916 * this list to be empty even when there is still dirty data=ordered
1917 * extents waiting to finish IO.
1918 */
1919 struct list_head delalloc_inodes;
1920 struct list_head delalloc_root;
1921 u64 nr_delalloc_inodes;
Miao Xie31f3d252014-03-06 13:55:02 +08001922
1923 struct mutex ordered_extent_mutex;
Miao Xie199c2a92013-05-15 07:48:23 +00001924 /*
1925 * this is used by the balancing code to wait for all the pending
1926 * ordered extents
1927 */
1928 spinlock_t ordered_extent_lock;
1929
1930 /*
1931 * all of the data=ordered extents pending writeback
1932 * these can span multiple transactions and basically include
1933 * every dirty data page that isn't from nodatacow
1934 */
1935 struct list_head ordered_extents;
1936 struct list_head ordered_root;
1937 u64 nr_ordered_extents;
David Sterba2c686532013-12-16 17:34:17 +01001938
1939 /*
1940 * Number of currently running SEND ioctls to prevent
1941 * manipulation with the read-only status via SUBVOL_SETFLAGS
1942 */
1943 int send_in_progress;
Miao Xie8257b2d2014-03-06 13:38:19 +08001944 struct btrfs_subvolume_writers *subv_writers;
1945 atomic_t will_be_snapshoted;
Chris Mason62e27492007-03-15 12:56:47 -04001946};
1947
Chris Mason4cb53002011-05-24 15:35:30 -04001948struct btrfs_ioctl_defrag_range_args {
1949 /* start of the defrag operation */
1950 __u64 start;
1951
1952 /* number of bytes to defrag, use (u64)-1 to say all */
1953 __u64 len;
1954
1955 /*
1956 * flags for the operation, which can include turning
1957 * on compression for this one defrag
1958 */
1959 __u64 flags;
1960
1961 /*
1962 * any extent bigger than this will be considered
1963 * already defragged. Use 0 to take the kernel default
1964 * Use 1 to say every single extent must be rewritten
1965 */
1966 __u32 extent_thresh;
1967
1968 /*
1969 * which compression method to use if turning on compression
1970 * for this defrag operation. If unspecified, zlib will
1971 * be used
1972 */
1973 __u32 compress_type;
1974
1975 /* spare for later */
1976 __u32 unused[4];
1977};
1978
1979
Chris Mason1e1d2702007-03-15 19:03:33 -04001980/*
1981 * inode items have the data typically returned from stat and store other
1982 * info about object characteristics. There is one for every file and dir in
1983 * the FS
1984 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001985#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001986#define BTRFS_INODE_REF_KEY 12
Mark Fashehf1863732012-08-08 11:32:27 -07001987#define BTRFS_INODE_EXTREF_KEY 13
Chris Mason0660b5a2008-11-17 20:37:39 -05001988#define BTRFS_XATTR_ITEM_KEY 24
1989#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001990/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001991
1992/*
1993 * dir items are the name -> inode pointers in a directory. There is one
1994 * for every name in a directory.
1995 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001996#define BTRFS_DIR_LOG_ITEM_KEY 60
1997#define BTRFS_DIR_LOG_INDEX_KEY 72
1998#define BTRFS_DIR_ITEM_KEY 84
1999#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04002000/*
Chris Mason9078a3e2007-04-26 16:46:15 -04002001 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04002002 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002003#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05002004
Chris Mason1e1d2702007-03-15 19:03:33 -04002005/*
Chris Masond20f7042008-12-08 16:58:54 -05002006 * extent csums are stored in a separate tree and hold csums for
2007 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04002008 */
Chris Masond20f7042008-12-08 16:58:54 -05002009#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04002010
2011/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04002012 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04002013 * tree used by the super block to find all the other trees
2014 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002015#define BTRFS_ROOT_ITEM_KEY 132
2016
2017/*
2018 * root backrefs tie subvols and snapshots to the directory entries that
2019 * reference them
2020 */
2021#define BTRFS_ROOT_BACKREF_KEY 144
2022
2023/*
2024 * root refs make a fast index for listing all of the snapshots and
2025 * subvolumes referenced by a given root. They point directly to the
2026 * directory item in the root that references the subvol
2027 */
2028#define BTRFS_ROOT_REF_KEY 156
2029
Chris Mason1e1d2702007-03-15 19:03:33 -04002030/*
2031 * extent items are in the extent map tree. These record which blocks
2032 * are used, and how many references there are to each block
2033 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002034#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002035
Josef Bacik3173a182013-03-07 14:22:04 -05002036/*
2037 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2038 * the length, so we save the level in key->offset instead of the length.
2039 */
2040#define BTRFS_METADATA_ITEM_KEY 169
2041
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002042#define BTRFS_TREE_BLOCK_REF_KEY 176
2043
2044#define BTRFS_EXTENT_DATA_REF_KEY 178
2045
2046#define BTRFS_EXTENT_REF_V0_KEY 180
2047
2048#define BTRFS_SHARED_BLOCK_REF_KEY 182
2049
2050#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04002051
2052/*
2053 * block groups give us hints into the extent allocation trees. Which
2054 * blocks are free etc etc
2055 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002056#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04002057
Chris Mason0660b5a2008-11-17 20:37:39 -05002058#define BTRFS_DEV_EXTENT_KEY 204
2059#define BTRFS_DEV_ITEM_KEY 216
2060#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04002061
Arne Jansen630dc772011-09-13 11:06:07 +02002062/*
2063 * Records the overall state of the qgroups.
2064 * There's only one instance of this key present,
2065 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2066 */
2067#define BTRFS_QGROUP_STATUS_KEY 240
2068/*
2069 * Records the currently used space of the qgroup.
2070 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2071 */
2072#define BTRFS_QGROUP_INFO_KEY 242
2073/*
2074 * Contains the user configured limits for the qgroup.
2075 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2076 */
2077#define BTRFS_QGROUP_LIMIT_KEY 244
2078/*
2079 * Records the child-parent relationship of qgroups. For
2080 * each relation, 2 keys are present:
2081 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2082 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2083 */
2084#define BTRFS_QGROUP_RELATION_KEY 246
2085
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002086#define BTRFS_BALANCE_ITEM_KEY 248
2087
Chris Mason9f5fae22007-03-20 14:38:32 -04002088/*
Stefan Behrens733f4fb2012-05-25 16:06:10 +02002089 * Persistantly stores the io stats in the device tree.
2090 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2091 */
2092#define BTRFS_DEV_STATS_KEY 249
2093
2094/*
Stefan Behrensa2bff642012-11-05 17:32:20 +01002095 * Persistantly stores the device replace state in the device tree.
2096 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2097 */
2098#define BTRFS_DEV_REPLACE_KEY 250
2099
2100/*
Stefan Behrens07b30a42013-08-15 17:11:17 +02002101 * Stores items that allow to quickly map UUIDs to something else.
2102 * These items are part of the filesystem UUID tree.
2103 * The key is built like this:
2104 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2105 */
2106#if BTRFS_UUID_SIZE != 16
2107#error "UUID items require BTRFS_UUID_SIZE == 16!"
2108#endif
2109#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2110#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2111 * received subvols */
2112
2113/*
Chris Mason1e1d2702007-03-15 19:03:33 -04002114 * string items are for debugging. They just store a short string of
2115 * data in the FS
2116 */
Chris Mason9078a3e2007-04-26 16:46:15 -04002117#define BTRFS_STRING_ITEM_KEY 253
2118
David Sterba0942caa2011-06-28 15:10:37 +00002119/*
2120 * Flags for mount options.
2121 *
2122 * Note: don't forget to add new options to btrfs_show_options()
2123 */
Chris Mason21ad10c2008-01-09 09:23:21 -05002124#define BTRFS_MOUNT_NODATASUM (1 << 0)
2125#define BTRFS_MOUNT_NODATACOW (1 << 1)
2126#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05002127#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04002128#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04002129#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04002130#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04002131#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04002132#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04002133#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04002134#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05002135#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04002136#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04002137#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04002138#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05002139#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04002140#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04002141#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Chris Masonaf31f5e2011-11-03 15:17:42 -04002142#define BTRFS_MOUNT_RECOVERY (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02002143#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05002144#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2145#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04002146#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Stefan Behrensf420ee12013-08-15 17:11:24 +02002147#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002148
David Sterba8b87dc12013-08-01 18:14:52 +02002149#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
Filipe David Borba Manana95ac5672013-08-08 22:45:48 +01002150#define BTRFS_DEFAULT_MAX_INLINE (8192)
David Sterba8b87dc12013-08-01 18:14:52 +02002151
Chris Masonb6cda9b2007-12-14 15:30:32 -05002152#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2153#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
Miao Xiedc81cdc2013-02-20 23:32:52 -07002154#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002155#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2156 BTRFS_MOUNT_##opt)
David Sterba572d9ab2014-02-05 15:26:17 +01002157
Wang Shilong9d89ce62014-04-23 19:33:33 +08002158#define btrfs_set_and_info(root, opt, fmt, args...) \
2159{ \
2160 if (!btrfs_test_opt(root, opt)) \
2161 btrfs_info(root->fs_info, fmt, ##args); \
2162 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2163}
2164
2165#define btrfs_clear_and_info(root, opt, fmt, args...) \
2166{ \
2167 if (btrfs_test_opt(root, opt)) \
2168 btrfs_info(root->fs_info, fmt, ##args); \
2169 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2170}
2171
Yanb98b6762008-01-08 15:54:37 -05002172/*
David Sterba572d9ab2014-02-05 15:26:17 +01002173 * Requests for changes that need to be done during transaction commit.
2174 *
2175 * Internal mount options that are used for special handling of the real
2176 * mount options (eg. cannot be set during remount and have to be set during
2177 * transaction commit)
2178 */
2179
David Sterba7e1876a2014-02-05 15:26:17 +01002180#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2181#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
David Sterbad51033d2014-11-12 14:24:35 +01002182#define BTRFS_PENDING_COMMIT (2)
David Sterba7e1876a2014-02-05 15:26:17 +01002183
David Sterba572d9ab2014-02-05 15:26:17 +01002184#define btrfs_test_pending(info, opt) \
2185 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2186#define btrfs_set_pending(info, opt) \
2187 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2188#define btrfs_clear_pending(info, opt) \
2189 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2190
2191/*
2192 * Helpers for setting pending mount option changes.
2193 *
2194 * Expects corresponding macros
2195 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2196 */
2197#define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2198do { \
2199 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2200 btrfs_info((info), fmt, ##args); \
2201 btrfs_set_pending((info), SET_##opt); \
2202 btrfs_clear_pending((info), CLEAR_##opt); \
2203 } \
2204} while(0)
2205
2206#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2207do { \
2208 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2209 btrfs_info((info), fmt, ##args); \
2210 btrfs_set_pending((info), CLEAR_##opt); \
2211 btrfs_clear_pending((info), SET_##opt); \
2212 } \
2213} while(0)
2214
2215/*
Yanb98b6762008-01-08 15:54:37 -05002216 * Inode flags
2217 */
Yanfdebe2b2008-01-14 13:26:08 -05002218#define BTRFS_INODE_NODATASUM (1 << 0)
2219#define BTRFS_INODE_NODATACOW (1 << 1)
2220#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04002221#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04002222#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002223#define BTRFS_INODE_SYNC (1 << 5)
2224#define BTRFS_INODE_IMMUTABLE (1 << 6)
2225#define BTRFS_INODE_APPEND (1 << 7)
2226#define BTRFS_INODE_NODUMP (1 << 8)
2227#define BTRFS_INODE_NOATIME (1 << 9)
2228#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00002229#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002230
Li Zefan08fe4db2011-03-28 02:01:25 +00002231#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2232
Chris Masoncfed81a2012-03-03 07:40:03 -05002233struct btrfs_map_token {
2234 struct extent_buffer *eb;
2235 char *kaddr;
2236 unsigned long offset;
2237};
2238
2239static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2240{
Josef Bacikad914552012-10-15 13:39:33 -04002241 token->kaddr = NULL;
Chris Masoncfed81a2012-03-03 07:40:03 -05002242}
2243
Chris Mason5f39d392007-10-15 16:14:19 -04002244/* some macros to generate set/get funcs for the struct fields. This
2245 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2246 * one for u8:
2247 */
2248#define le8_to_cpu(v) (v)
2249#define cpu_to_le8(v) (v)
2250#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04002251
Chris Mason5f39d392007-10-15 16:14:19 -04002252#define read_eb_member(eb, ptr, type, member, result) ( \
2253 read_extent_buffer(eb, (char *)(result), \
2254 ((unsigned long)(ptr)) + \
2255 offsetof(type, member), \
2256 sizeof(((type *)0)->member)))
2257
2258#define write_eb_member(eb, ptr, type, member, result) ( \
2259 write_extent_buffer(eb, (char *)(result), \
2260 ((unsigned long)(ptr)) + \
2261 offsetof(type, member), \
2262 sizeof(((type *)0)->member)))
2263
Li Zefan18077bb2012-07-09 20:22:35 -06002264#define DECLARE_BTRFS_SETGET_BITS(bits) \
2265u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2266 unsigned long off, \
2267 struct btrfs_map_token *token); \
2268void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2269 unsigned long off, u##bits val, \
2270 struct btrfs_map_token *token); \
2271static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2272 unsigned long off) \
2273{ \
2274 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2275} \
2276static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2277 unsigned long off, u##bits val) \
2278{ \
2279 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2280}
2281
2282DECLARE_BTRFS_SETGET_BITS(8)
2283DECLARE_BTRFS_SETGET_BITS(16)
2284DECLARE_BTRFS_SETGET_BITS(32)
2285DECLARE_BTRFS_SETGET_BITS(64)
2286
Chris Mason5f39d392007-10-15 16:14:19 -04002287#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Li Zefan18077bb2012-07-09 20:22:35 -06002288static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2289{ \
2290 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2291 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2292} \
2293static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2294 u##bits val) \
2295{ \
2296 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2297 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2298} \
2299static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2300 struct btrfs_map_token *token) \
2301{ \
2302 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2303 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2304} \
2305static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2306 type *s, u##bits val, \
2307 struct btrfs_map_token *token) \
2308{ \
2309 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2310 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2311}
Chris Mason9078a3e2007-04-26 16:46:15 -04002312
Chris Mason5f39d392007-10-15 16:14:19 -04002313#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2314static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2315{ \
Chris Mason727011e2010-08-06 13:21:20 -04002316 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002317 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04002318 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04002319} \
2320static inline void btrfs_set_##name(struct extent_buffer *eb, \
2321 u##bits val) \
2322{ \
Chris Mason727011e2010-08-06 13:21:20 -04002323 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002324 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04002325}
Chris Mason1e1d2702007-03-15 19:03:33 -04002326
Chris Mason5f39d392007-10-15 16:14:19 -04002327#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2328static inline u##bits btrfs_##name(type *s) \
2329{ \
2330 return le##bits##_to_cpu(s->member); \
2331} \
2332static inline void btrfs_set_##name(type *s, u##bits val) \
2333{ \
2334 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04002335}
2336
Chris Mason0b86a832008-03-24 15:01:56 -04002337BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2338BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2339BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2340BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2341BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05002342BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2343 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002344BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2345BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002346BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2347BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2348BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002349BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002350
Chris Mason8a4b83c2008-03-24 15:02:07 -04002351BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2352BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2353 total_bytes, 64);
2354BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2355 bytes_used, 64);
2356BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2357 io_align, 32);
2358BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2359 io_width, 32);
2360BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2361 sector_size, 32);
2362BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002363BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2364 dev_group, 32);
2365BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2366 seek_speed, 8);
2367BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2368 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002369BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2370 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002371
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002372static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
Chris Mason0b86a832008-03-24 15:01:56 -04002373{
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002374 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
Chris Mason0b86a832008-03-24 15:01:56 -04002375}
2376
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002377static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
Yan Zheng2b820322008-11-17 21:11:30 -05002378{
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002379 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
Yan Zheng2b820322008-11-17 21:11:30 -05002380}
2381
Chris Masone17cade2008-04-15 15:41:47 -04002382BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002383BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2384BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2385BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2386BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2387BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2388BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2389BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002390BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002391BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2392BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2393
Chris Masone17cade2008-04-15 15:41:47 -04002394static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2395{
2396 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2397}
2398
2399BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002400BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2401BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2402 stripe_len, 64);
2403BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2404 io_align, 32);
2405BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2406 io_width, 32);
2407BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2408 sector_size, 32);
2409BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2410BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2411 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002412BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2413 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002414BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2415BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2416
2417static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2418 int nr)
2419{
2420 unsigned long offset = (unsigned long)c;
2421 offset += offsetof(struct btrfs_chunk, stripe);
2422 offset += nr * sizeof(struct btrfs_stripe);
2423 return (struct btrfs_stripe *)offset;
2424}
2425
Chris Masona4437552008-04-18 10:29:38 -04002426static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2427{
2428 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2429}
2430
Chris Mason0b86a832008-03-24 15:01:56 -04002431static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2432 struct btrfs_chunk *c, int nr)
2433{
2434 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2435}
2436
Chris Mason0b86a832008-03-24 15:01:56 -04002437static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2438 struct btrfs_chunk *c, int nr)
2439{
2440 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2441}
2442
Chris Mason5f39d392007-10-15 16:14:19 -04002443/* struct btrfs_block_group_item */
2444BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2445 used, 64);
2446BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2447 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002448BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2449 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002450
2451BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04002452 struct btrfs_block_group_item, chunk_objectid, 64);
2453BTRFS_SETGET_FUNCS(disk_block_group_flags,
2454 struct btrfs_block_group_item, flags, 64);
2455BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2456 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002457
Chris Mason39544012007-12-12 14:38:19 -05002458/* struct btrfs_inode_ref */
2459BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04002460BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05002461
Mark Fashehf1863732012-08-08 11:32:27 -07002462/* struct btrfs_inode_extref */
2463BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2464 parent_objectid, 64);
2465BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2466 name_len, 16);
2467BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2468
Chris Mason5f39d392007-10-15 16:14:19 -04002469/* struct btrfs_inode_item */
2470BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002471BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002472BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002473BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04002474BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002475BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2476BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2477BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2478BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2479BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04002480BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002481BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002482BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2483 generation, 64);
2484BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2485 sequence, 64);
2486BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2487 transid, 64);
2488BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2489BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2490 nbytes, 64);
2491BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2492 block_group, 64);
2493BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2494BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2495BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2496BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2497BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2498BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002499BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2500BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002501BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2502BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002503
Chris Mason0b86a832008-03-24 15:01:56 -04002504/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04002505BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2506 chunk_tree, 64);
2507BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2508 chunk_objectid, 64);
2509BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2510 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002511BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2512
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002513static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
Chris Masone17cade2008-04-15 15:41:47 -04002514{
2515 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002516 return (unsigned long)dev + ptr;
Chris Masone17cade2008-04-15 15:41:47 -04002517}
2518
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002519BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2520BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2521 generation, 64);
2522BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002523
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002524BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002525
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002526
2527BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2528
2529static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2530 struct btrfs_tree_block_info *item,
2531 struct btrfs_disk_key *key)
2532{
2533 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2534}
2535
2536static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2537 struct btrfs_tree_block_info *item,
2538 struct btrfs_disk_key *key)
2539{
2540 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2541}
2542
2543BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2544 root, 64);
2545BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2546 objectid, 64);
2547BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2548 offset, 64);
2549BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2550 count, 32);
2551
2552BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2553 count, 32);
2554
2555BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2556 type, 8);
2557BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2558 offset, 64);
2559
2560static inline u32 btrfs_extent_inline_ref_size(int type)
2561{
2562 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2563 type == BTRFS_SHARED_BLOCK_REF_KEY)
2564 return sizeof(struct btrfs_extent_inline_ref);
2565 if (type == BTRFS_SHARED_DATA_REF_KEY)
2566 return sizeof(struct btrfs_shared_data_ref) +
2567 sizeof(struct btrfs_extent_inline_ref);
2568 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2569 return sizeof(struct btrfs_extent_data_ref) +
2570 offsetof(struct btrfs_extent_inline_ref, offset);
2571 BUG();
2572 return 0;
2573}
2574
2575BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2576BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2577 generation, 64);
2578BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2579BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002580
2581/* struct btrfs_node */
2582BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002583BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002584BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2585 blockptr, 64);
2586BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2587 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002588
2589static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002590{
Chris Mason5f39d392007-10-15 16:14:19 -04002591 unsigned long ptr;
2592 ptr = offsetof(struct btrfs_node, ptrs) +
2593 sizeof(struct btrfs_key_ptr) * nr;
2594 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002595}
2596
Chris Mason5f39d392007-10-15 16:14:19 -04002597static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2598 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04002599{
Chris Mason5f39d392007-10-15 16:14:19 -04002600 unsigned long ptr;
2601 ptr = offsetof(struct btrfs_node, ptrs) +
2602 sizeof(struct btrfs_key_ptr) * nr;
2603 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04002604}
2605
Chris Mason74493f72007-12-11 09:25:06 -05002606static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2607{
2608 unsigned long ptr;
2609 ptr = offsetof(struct btrfs_node, ptrs) +
2610 sizeof(struct btrfs_key_ptr) * nr;
2611 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2612}
2613
2614static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2615 int nr, u64 val)
2616{
2617 unsigned long ptr;
2618 ptr = offsetof(struct btrfs_node, ptrs) +
2619 sizeof(struct btrfs_key_ptr) * nr;
2620 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2621}
2622
Chris Mason810191f2007-10-15 16:18:55 -04002623static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04002624{
Chris Mason5f39d392007-10-15 16:14:19 -04002625 return offsetof(struct btrfs_node, ptrs) +
2626 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04002627}
2628
Chris Masone644d022007-11-06 15:09:29 -05002629void btrfs_node_key(struct extent_buffer *eb,
2630 struct btrfs_disk_key *disk_key, int nr);
2631
Chris Mason5f39d392007-10-15 16:14:19 -04002632static inline void btrfs_set_node_key(struct extent_buffer *eb,
2633 struct btrfs_disk_key *disk_key, int nr)
2634{
2635 unsigned long ptr;
2636 ptr = btrfs_node_key_ptr_offset(nr);
2637 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2638 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002639}
2640
Chris Mason5f39d392007-10-15 16:14:19 -04002641/* struct btrfs_item */
2642BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2643BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002644BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2645BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002646
2647static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002648{
Chris Mason5f39d392007-10-15 16:14:19 -04002649 return offsetof(struct btrfs_leaf, items) +
2650 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002651}
2652
Ross Kirkdd3cc162013-09-16 15:58:09 +01002653static inline struct btrfs_item *btrfs_item_nr(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002654{
Chris Mason5f39d392007-10-15 16:14:19 -04002655 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002656}
2657
Chris Mason5f39d392007-10-15 16:14:19 -04002658static inline u32 btrfs_item_end(struct extent_buffer *eb,
2659 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002660{
Chris Mason5f39d392007-10-15 16:14:19 -04002661 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04002662}
2663
Chris Mason5f39d392007-10-15 16:14:19 -04002664static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002665{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002666 return btrfs_item_end(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002667}
2668
Chris Mason5f39d392007-10-15 16:14:19 -04002669static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002670{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002671 return btrfs_item_offset(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002672}
2673
Chris Mason5f39d392007-10-15 16:14:19 -04002674static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002675{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002676 return btrfs_item_size(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002677}
2678
Chris Mason5f39d392007-10-15 16:14:19 -04002679static inline void btrfs_item_key(struct extent_buffer *eb,
2680 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002681{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002682 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002683 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002684}
2685
Chris Mason5f39d392007-10-15 16:14:19 -04002686static inline void btrfs_set_item_key(struct extent_buffer *eb,
2687 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002688{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002689 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002690 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002691}
2692
Chris Masone02119d2008-09-05 16:13:11 -04002693BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2694
Chris Mason0660b5a2008-11-17 20:37:39 -05002695/*
2696 * struct btrfs_root_ref
2697 */
2698BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2699BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2700BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2701
Chris Mason5f39d392007-10-15 16:14:19 -04002702/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05002703BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04002704BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2705BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04002706BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002707BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2708BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2709 data_len, 16);
2710BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2711 name_len, 16);
2712BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2713 transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002714
2715static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2716 struct btrfs_dir_item *item,
2717 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002718{
Chris Mason5f39d392007-10-15 16:14:19 -04002719 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002720}
2721
Chris Mason5f39d392007-10-15 16:14:19 -04002722static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2723 struct btrfs_dir_item *item,
2724 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002725{
Chris Mason5f39d392007-10-15 16:14:19 -04002726 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002727}
2728
Josef Bacik0af3d002010-06-21 14:48:16 -04002729BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2730 num_entries, 64);
2731BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2732 num_bitmaps, 64);
2733BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2734 generation, 64);
2735
2736static inline void btrfs_free_space_key(struct extent_buffer *eb,
2737 struct btrfs_free_space_header *h,
2738 struct btrfs_disk_key *key)
2739{
2740 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2741}
2742
2743static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2744 struct btrfs_free_space_header *h,
2745 struct btrfs_disk_key *key)
2746{
2747 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2748}
2749
Chris Mason5f39d392007-10-15 16:14:19 -04002750/* struct btrfs_disk_key */
2751BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2752 objectid, 64);
2753BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2754BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04002755
Chris Masone2fa7222007-03-12 16:22:34 -04002756static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2757 struct btrfs_disk_key *disk)
2758{
2759 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002760 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002761 cpu->objectid = le64_to_cpu(disk->objectid);
2762}
2763
2764static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2765 struct btrfs_key *cpu)
2766{
2767 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002768 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002769 disk->objectid = cpu_to_le64(cpu->objectid);
2770}
2771
Chris Mason5f39d392007-10-15 16:14:19 -04002772static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2773 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002774{
Chris Mason5f39d392007-10-15 16:14:19 -04002775 struct btrfs_disk_key disk_key;
2776 btrfs_node_key(eb, &disk_key, nr);
2777 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002778}
2779
Chris Mason5f39d392007-10-15 16:14:19 -04002780static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2781 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002782{
Chris Mason5f39d392007-10-15 16:14:19 -04002783 struct btrfs_disk_key disk_key;
2784 btrfs_item_key(eb, &disk_key, nr);
2785 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002786}
2787
Chris Mason5f39d392007-10-15 16:14:19 -04002788static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2789 struct btrfs_dir_item *item,
2790 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002791{
Chris Mason5f39d392007-10-15 16:14:19 -04002792 struct btrfs_disk_key disk_key;
2793 btrfs_dir_item_key(eb, item, &disk_key);
2794 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002795}
2796
Chris Mason5f39d392007-10-15 16:14:19 -04002797
2798static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002799{
Chris Mason5f39d392007-10-15 16:14:19 -04002800 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002801}
2802
Chris Mason5f39d392007-10-15 16:14:19 -04002803static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002804{
Chris Mason5f39d392007-10-15 16:14:19 -04002805 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002806}
2807
Chris Mason5f39d392007-10-15 16:14:19 -04002808/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002809BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002810BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2811 generation, 64);
2812BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2813BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002814BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002815BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002816BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2817 generation, 64);
2818BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2819BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2820 nritems, 32);
2821BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002822
Chris Mason63b10fc2008-04-01 11:21:32 -04002823static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2824{
2825 return (btrfs_header_flags(eb) & flag) == flag;
2826}
2827
2828static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2829{
2830 u64 flags = btrfs_header_flags(eb);
2831 btrfs_set_header_flags(eb, flags | flag);
2832 return (flags & flag) == flag;
2833}
2834
2835static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2836{
2837 u64 flags = btrfs_header_flags(eb);
2838 btrfs_set_header_flags(eb, flags & ~flag);
2839 return (flags & flag) == flag;
2840}
2841
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002842static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2843{
2844 u64 flags = btrfs_header_flags(eb);
2845 return flags >> BTRFS_BACKREF_REV_SHIFT;
2846}
2847
2848static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2849 int rev)
2850{
2851 u64 flags = btrfs_header_flags(eb);
2852 flags &= ~BTRFS_BACKREF_REV_MASK;
2853 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2854 btrfs_set_header_flags(eb, flags);
2855}
2856
Ross Kirk0a4e5582013-09-24 10:12:38 +01002857static inline unsigned long btrfs_header_fsid(void)
Chris Masone2fa7222007-03-12 16:22:34 -04002858{
Geert Uytterhoevenfba6aa72013-08-20 13:20:14 +02002859 return offsetof(struct btrfs_header, fsid);
Chris Masone2fa7222007-03-12 16:22:34 -04002860}
2861
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002862static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
Chris Masone17cade2008-04-15 15:41:47 -04002863{
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002864 return offsetof(struct btrfs_header, chunk_tree_uuid);
Chris Masone17cade2008-04-15 15:41:47 -04002865}
2866
Chris Mason5f39d392007-10-15 16:14:19 -04002867static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002868{
Chris Masond3977122009-01-05 21:25:51 -05002869 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002870}
2871
Chris Mason5f39d392007-10-15 16:14:19 -04002872/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002873BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2874 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002875BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002876BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2877BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002878
Yan Zheng84234f32008-10-29 14:49:05 -04002879BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2880 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002881BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2882BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002883BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2884BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002885BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002886BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2887BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002888BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2889 last_snapshot, 64);
Alexander Block8ea05e32012-07-25 17:35:53 +02002890BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2891 generation_v2, 64);
2892BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2893 ctransid, 64);
2894BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2895 otransid, 64);
2896BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2897 stransid, 64);
2898BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2899 rtransid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002900
Li Zefanb83cc962010-12-20 16:04:08 +08002901static inline bool btrfs_root_readonly(struct btrfs_root *root)
2902{
Al Viro6ed3cf22012-04-13 11:49:04 -04002903 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002904}
2905
David Sterba521e0542014-04-15 16:41:44 +02002906static inline bool btrfs_root_dead(struct btrfs_root *root)
2907{
2908 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2909}
2910
Chris Masonaf31f5e2011-11-03 15:17:42 -04002911/* struct btrfs_root_backup */
2912BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2913 tree_root, 64);
2914BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2915 tree_root_gen, 64);
2916BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2917 tree_root_level, 8);
2918
2919BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2920 chunk_root, 64);
2921BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2922 chunk_root_gen, 64);
2923BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2924 chunk_root_level, 8);
2925
2926BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2927 extent_root, 64);
2928BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2929 extent_root_gen, 64);
2930BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2931 extent_root_level, 8);
2932
2933BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2934 fs_root, 64);
2935BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2936 fs_root_gen, 64);
2937BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2938 fs_root_level, 8);
2939
2940BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2941 dev_root, 64);
2942BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2943 dev_root_gen, 64);
2944BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2945 dev_root_level, 8);
2946
2947BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2948 csum_root, 64);
2949BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2950 csum_root_gen, 64);
2951BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2952 csum_root_level, 8);
2953BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2954 total_bytes, 64);
2955BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2956 bytes_used, 64);
2957BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2958 num_devices, 64);
2959
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002960/* struct btrfs_balance_item */
2961BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002962
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002963static inline void btrfs_balance_data(struct extent_buffer *eb,
2964 struct btrfs_balance_item *bi,
2965 struct btrfs_disk_balance_args *ba)
2966{
2967 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2968}
2969
2970static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2971 struct btrfs_balance_item *bi,
2972 struct btrfs_disk_balance_args *ba)
2973{
2974 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2975}
2976
2977static inline void btrfs_balance_meta(struct extent_buffer *eb,
2978 struct btrfs_balance_item *bi,
2979 struct btrfs_disk_balance_args *ba)
2980{
2981 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2982}
2983
2984static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2985 struct btrfs_balance_item *bi,
2986 struct btrfs_disk_balance_args *ba)
2987{
2988 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2989}
2990
2991static inline void btrfs_balance_sys(struct extent_buffer *eb,
2992 struct btrfs_balance_item *bi,
2993 struct btrfs_disk_balance_args *ba)
2994{
2995 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2996}
2997
2998static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2999 struct btrfs_balance_item *bi,
3000 struct btrfs_disk_balance_args *ba)
3001{
3002 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3003}
3004
3005static inline void
3006btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3007 struct btrfs_disk_balance_args *disk)
3008{
3009 memset(cpu, 0, sizeof(*cpu));
3010
3011 cpu->profiles = le64_to_cpu(disk->profiles);
3012 cpu->usage = le64_to_cpu(disk->usage);
3013 cpu->devid = le64_to_cpu(disk->devid);
3014 cpu->pstart = le64_to_cpu(disk->pstart);
3015 cpu->pend = le64_to_cpu(disk->pend);
3016 cpu->vstart = le64_to_cpu(disk->vstart);
3017 cpu->vend = le64_to_cpu(disk->vend);
3018 cpu->target = le64_to_cpu(disk->target);
3019 cpu->flags = le64_to_cpu(disk->flags);
David Sterba7d824b62014-05-07 17:37:51 +02003020 cpu->limit = le64_to_cpu(disk->limit);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003021}
3022
3023static inline void
3024btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3025 struct btrfs_balance_args *cpu)
3026{
3027 memset(disk, 0, sizeof(*disk));
3028
3029 disk->profiles = cpu_to_le64(cpu->profiles);
3030 disk->usage = cpu_to_le64(cpu->usage);
3031 disk->devid = cpu_to_le64(cpu->devid);
3032 disk->pstart = cpu_to_le64(cpu->pstart);
3033 disk->pend = cpu_to_le64(cpu->pend);
3034 disk->vstart = cpu_to_le64(cpu->vstart);
3035 disk->vend = cpu_to_le64(cpu->vend);
3036 disk->target = cpu_to_le64(cpu->target);
3037 disk->flags = cpu_to_le64(cpu->flags);
David Sterba7d824b62014-05-07 17:37:51 +02003038 disk->limit = cpu_to_le64(cpu->limit);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003039}
3040
3041/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04003042BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04003043BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003044BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3045 generation, 64);
3046BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04003047BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3048 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04003049BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3050 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04003051BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3052 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04003053BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3054 chunk_root, 64);
3055BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04003056 chunk_root_level, 8);
3057BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3058 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05003059BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3060 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04003061BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3062 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04003063BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3064 total_bytes, 64);
3065BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3066 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003067BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3068 sectorsize, 32);
3069BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3070 nodesize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05003071BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3072 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04003073BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3074 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04003075BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3076 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05003077BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3078 compat_flags, 64);
3079BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00003080 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05003081BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3082 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05003083BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3084 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04003085BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3086 cache_generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08003087BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
Stefan Behrens26432792013-08-15 17:11:22 +02003088BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3089 uuid_tree_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05003090
3091static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3092{
David Sterba1104a882013-03-06 15:57:46 +01003093 u16 t = btrfs_super_csum_type(s);
3094 /*
3095 * csum type is validated at mount time
3096 */
Josef Bacik607d4322008-12-02 07:17:45 -05003097 return btrfs_csum_sizes[t];
3098}
Chris Mason5f39d392007-10-15 16:14:19 -04003099
3100static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04003101{
Chris Mason5f39d392007-10-15 16:14:19 -04003102 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04003103}
3104
Chris Mason5f39d392007-10-15 16:14:19 -04003105/* struct btrfs_file_extent_item */
3106BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08003107BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3108 struct btrfs_file_extent_item, disk_bytenr, 64);
3109BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3110 struct btrfs_file_extent_item, offset, 64);
3111BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3112 struct btrfs_file_extent_item, generation, 64);
3113BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3114 struct btrfs_file_extent_item, num_bytes, 64);
Josef Bacike20d6c52013-11-13 21:11:49 -05003115BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3116 struct btrfs_file_extent_item, disk_num_bytes, 64);
3117BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3118 struct btrfs_file_extent_item, compression, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04003119
Chris Masond3977122009-01-05 21:25:51 -05003120static inline unsigned long
3121btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454df2007-04-19 13:37:44 -04003122{
David Sterba7ec20af2014-07-24 17:34:58 +02003123 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Mason236454df2007-04-19 13:37:44 -04003124}
3125
3126static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3127{
David Sterba7ec20af2014-07-24 17:34:58 +02003128 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
Chris Mason236454df2007-04-19 13:37:44 -04003129}
3130
Chris Masondb945352007-10-15 16:15:53 -04003131BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3132 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003133BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3134 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04003135BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3136 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003137BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3138 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04003139BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3140 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04003141BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3142 ram_bytes, 64);
3143BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3144 compression, 8);
3145BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3146 encryption, 8);
3147BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3148 other_encoding, 16);
3149
Chris Masonc8b97812008-10-29 14:49:59 -04003150/*
3151 * this returns the number of bytes used by the item on disk, minus the
3152 * size of any extent headers. If a file is compressed on disk, this is
3153 * the compressed size
3154 */
3155static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3156 struct btrfs_item *e)
3157{
David Sterba7ec20af2014-07-24 17:34:58 +02003158 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Masonc8b97812008-10-29 14:49:59 -04003159}
Chris Mason9f5fae22007-03-20 14:38:32 -04003160
Chris Mason514ac8a2014-01-03 21:07:00 -08003161/* this returns the number of file bytes represented by the inline item.
3162 * If an item is compressed, this is the uncompressed size
3163 */
3164static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3165 int slot,
3166 struct btrfs_file_extent_item *fi)
3167{
3168 struct btrfs_map_token token;
3169
3170 btrfs_init_map_token(&token);
3171 /*
3172 * return the space used on disk if this item isn't
3173 * compressed or encoded
3174 */
3175 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3176 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3177 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3178 return btrfs_file_extent_inline_item_len(eb,
3179 btrfs_item_nr(slot));
3180 }
3181
3182 /* otherwise use the ram bytes field */
3183 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3184}
3185
3186
Stefan Behrens733f4fb2012-05-25 16:06:10 +02003187/* btrfs_dev_stats_item */
3188static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3189 struct btrfs_dev_stats_item *ptr,
3190 int index)
3191{
3192 u64 val;
3193
3194 read_extent_buffer(eb, &val,
3195 offsetof(struct btrfs_dev_stats_item, values) +
3196 ((unsigned long)ptr) + (index * sizeof(u64)),
3197 sizeof(val));
3198 return val;
3199}
3200
3201static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3202 struct btrfs_dev_stats_item *ptr,
3203 int index, u64 val)
3204{
3205 write_extent_buffer(eb, &val,
3206 offsetof(struct btrfs_dev_stats_item, values) +
3207 ((unsigned long)ptr) + (index * sizeof(u64)),
3208 sizeof(val));
3209}
3210
Arne Jansen630dc772011-09-13 11:06:07 +02003211/* btrfs_qgroup_status_item */
3212BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3213 generation, 64);
3214BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3215 version, 64);
3216BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3217 flags, 64);
Jan Schmidt2f232032013-04-25 16:04:51 +00003218BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3219 rescan, 64);
Arne Jansen630dc772011-09-13 11:06:07 +02003220
3221/* btrfs_qgroup_info_item */
3222BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3223 generation, 64);
3224BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3225BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3226 rfer_cmpr, 64);
3227BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3228BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3229 excl_cmpr, 64);
3230
3231BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3232 struct btrfs_qgroup_info_item, generation, 64);
3233BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3234 rfer, 64);
3235BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3236 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3237BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3238 excl, 64);
3239BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3240 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3241
3242/* btrfs_qgroup_limit_item */
3243BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3244 flags, 64);
3245BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3246 max_rfer, 64);
3247BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3248 max_excl, 64);
3249BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3250 rsv_rfer, 64);
3251BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3252 rsv_excl, 64);
3253
Stefan Behrensa2bff642012-11-05 17:32:20 +01003254/* btrfs_dev_replace_item */
3255BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3256 struct btrfs_dev_replace_item, src_devid, 64);
3257BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3258 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3259 64);
3260BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3261 replace_state, 64);
3262BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3263 time_started, 64);
3264BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3265 time_stopped, 64);
3266BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3267 num_write_errors, 64);
3268BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3269 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3270 64);
3271BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3272 cursor_left, 64);
3273BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3274 cursor_right, 64);
3275
3276BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3277 struct btrfs_dev_replace_item, src_devid, 64);
3278BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3279 struct btrfs_dev_replace_item,
3280 cont_reading_from_srcdev_mode, 64);
3281BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3282 struct btrfs_dev_replace_item, replace_state, 64);
3283BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3284 struct btrfs_dev_replace_item, time_started, 64);
3285BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3286 struct btrfs_dev_replace_item, time_stopped, 64);
3287BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3288 struct btrfs_dev_replace_item, num_write_errors, 64);
3289BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3290 struct btrfs_dev_replace_item,
3291 num_uncorrectable_read_errors, 64);
3292BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3293 struct btrfs_dev_replace_item, cursor_left, 64);
3294BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3295 struct btrfs_dev_replace_item, cursor_right, 64);
3296
Al Viro815745c2011-11-17 15:40:49 -05003297static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
Chris Masone20d96d2007-03-22 12:13:20 -04003298{
3299 return sb->s_fs_info;
3300}
3301
Chris Mason4beb1b82007-03-14 10:31:29 -04003302/* helper function to cast into the data area of the leaf. */
3303#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04003304 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04003305 btrfs_item_offset_nr(leaf, slot)))
3306
3307#define btrfs_item_ptr_offset(leaf, slot) \
3308 ((unsigned long)(btrfs_leaf_data(leaf) + \
3309 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04003310
Josef Bacik67377732010-09-16 16:19:09 -04003311static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3312{
3313 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3314 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3315}
3316
Josef Bacik3b16a4e2011-09-21 15:05:58 -04003317static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3318{
3319 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3320}
3321
Chris Masonb18c6682007-04-17 13:26:50 -04003322/* extent-tree.c */
Chris Mason28f75a02015-02-04 06:59:29 -08003323
3324u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3325
Miao Xie16cdcec2011-04-22 18:12:22 +08003326static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
Josef Bacik9e0baf62011-07-15 15:16:44 +00003327 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08003328{
David Sterba707e8a02014-06-04 19:22:26 +02003329 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
Josef Bacikc4fbb432013-09-17 10:50:06 -04003330 2 * num_items;
Miao Xie16cdcec2011-04-22 18:12:22 +08003331}
3332
Josef Bacik07127182011-08-19 10:29:59 -04003333/*
3334 * Doing a truncate won't result in new nodes or leaves, just what we need for
3335 * COW.
3336 */
3337static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3338 unsigned num_items)
3339{
David Sterba707e8a02014-06-04 19:22:26 +02003340 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
Josef Bacik07127182011-08-19 10:29:59 -04003341}
3342
Josef Bacik1be41b72013-06-12 13:56:06 -04003343int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3344 struct btrfs_root *root);
Josef Bacik0a2b2a82014-01-23 10:54:11 -05003345int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3346 struct btrfs_root *root);
Chris Masonfa9c0d792009-04-03 09:47:43 -04003347void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04003348int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3349 struct btrfs_root *root, unsigned long count);
Chris Masona79b7d42014-05-22 16:18:52 -07003350int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3351 unsigned long count, int wait);
Filipe Manana1a4ed8f2014-10-27 10:44:24 +00003352int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003353int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3354 struct btrfs_root *root, u64 bytenr,
Josef Bacik3173a182013-03-07 14:22:04 -05003355 u64 offset, int metadata, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04003356int btrfs_pin_extent(struct btrfs_root *root,
3357 u64 bytenr, u64 num, int reserved);
Liu Bodcfac412012-12-27 09:01:20 +00003358int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
Chris Masone688b7252011-10-31 20:52:39 -04003359 u64 bytenr, u64 num_bytes);
Josef Bacik8c2a1a32013-06-06 13:19:32 -04003360int btrfs_exclude_logged_extents(struct btrfs_root *root,
3361 struct extent_buffer *eb);
Yan Zheng80ff3852008-10-30 14:20:02 -04003362int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003363 struct btrfs_root *root,
3364 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05003365struct btrfs_block_group_cache *btrfs_lookup_block_group(
3366 struct btrfs_fs_info *info,
3367 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003368void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04003369int get_block_group_index(struct btrfs_block_group_cache *cache);
David Sterba4d75f8a2014-06-15 01:54:12 +02003370struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3371 struct btrfs_root *root, u64 parent,
3372 u64 root_objectid,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003373 struct btrfs_disk_key *key, int level,
Jan Schmidt5581a512012-05-16 17:04:52 +02003374 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003375void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3376 struct btrfs_root *root,
3377 struct extent_buffer *buf,
Jan Schmidt5581a512012-05-16 17:04:52 +02003378 u64 parent, int last_ref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003379int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3380 struct btrfs_root *root,
3381 u64 root_objectid, u64 owner,
3382 u64 offset, struct btrfs_key *ins);
3383int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3384 struct btrfs_root *root,
3385 u64 root_objectid, u64 owner, u64 offset,
3386 struct btrfs_key *ins);
Josef Bacik00361582013-08-14 14:02:47 -04003387int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3388 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
Miao Xiee570fd22014-06-19 10:42:50 +08003389 struct btrfs_key *ins, int is_data, int delalloc);
Chris Masone089f052007-03-16 16:20:31 -04003390int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07003391 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003392int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07003393 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003394int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3395 struct btrfs_root *root,
3396 u64 bytenr, u64 num_bytes, u64 flags,
Josef Bacikb1c79e02013-05-09 13:49:30 -04003397 int level, int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04003398int btrfs_free_extent(struct btrfs_trans_handle *trans,
3399 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003400 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
Josef Bacikfcebe452014-05-13 17:30:47 -07003401 u64 owner, u64 offset, int no_quota);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003402
Miao Xiee570fd22014-06-19 10:42:50 +08003403int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3404 int delalloc);
Chris Masone688b7252011-10-31 20:52:39 -04003405int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3406 u64 start, u64 len);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003407void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3408 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04003409int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04003410 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04003411int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04003412 struct btrfs_root *root,
3413 u64 bytenr, u64 num_bytes, u64 parent,
Josef Bacikfcebe452014-05-13 17:30:47 -07003414 u64 root_objectid, u64 owner, u64 offset, int no_quota);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003415
Chris Mason1bbc6212015-04-06 12:46:08 -07003416int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3417 struct btrfs_root *root);
Chris Mason9078a3e2007-04-26 16:46:15 -04003418int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3419 struct btrfs_root *root);
Josef Bacikdcdf7f62015-03-02 16:37:31 -05003420int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3421 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003422int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04003423int btrfs_free_block_groups(struct btrfs_fs_info *info);
3424int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04003425int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04003426int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3427 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04003428 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04003429 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04003430int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
Filipe Manana04216822014-11-27 21:14:15 +00003431 struct btrfs_root *root, u64 group_start,
3432 struct extent_map *em);
Josef Bacik47ab2a62014-09-18 11:20:02 -04003433void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04003434void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3435void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
Josef Bacikea658ba2012-09-11 16:57:25 -04003436void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3437 struct btrfs_root *root);
Miao Xie6d07bce2011-01-05 10:07:31 +00003438u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Chris Mason4184ea72009-03-10 12:39:20 -04003439void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Miao Xie08e007d2012-10-16 11:33:38 +00003440
3441enum btrfs_reserve_flush_enum {
3442 /* If we are in the transaction, we can't flush anything.*/
3443 BTRFS_RESERVE_NO_FLUSH,
3444 /*
3445 * Flushing delalloc may cause deadlock somewhere, in this
3446 * case, use FLUSH LIMIT
3447 */
3448 BTRFS_RESERVE_FLUSH_LIMIT,
3449 BTRFS_RESERVE_FLUSH_ALL,
3450};
3451
Dongsheng Yange2d1f922015-02-06 10:26:52 -05003452int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04003453void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003454void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3455 struct btrfs_root *root);
Filipe Manana4fbcdf62015-05-20 14:01:54 +01003456void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003457int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3458 struct inode *inode);
3459void btrfs_orphan_release_metadata(struct inode *inode);
Miao Xied5c12072013-02-28 10:04:33 +00003460int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3461 struct btrfs_block_rsv *rsv,
3462 int nitems,
Jeff Mahoneyee3441b2013-07-09 16:37:21 -04003463 u64 *qgroup_reserved, bool use_global_rsv);
Miao Xied5c12072013-02-28 10:04:33 +00003464void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3465 struct btrfs_block_rsv *rsv,
3466 u64 qgroup_reserved);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04003467int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3468void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3469int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3470void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Miao Xie66d8f3d2012-09-06 04:02:28 -06003471void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3472struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3473 unsigned short type);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003474void btrfs_free_block_rsv(struct btrfs_root *root,
3475 struct btrfs_block_rsv *rsv);
Chris Masoncdfb0802015-04-06 18:17:00 -07003476void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003477int btrfs_block_rsv_add(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003478 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3479 enum btrfs_reserve_flush_enum flush);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003480int btrfs_block_rsv_check(struct btrfs_root *root,
Josef Bacik36ba0222011-10-18 12:15:48 -04003481 struct btrfs_block_rsv *block_rsv, int min_factor);
3482int btrfs_block_rsv_refill(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003483 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3484 enum btrfs_reserve_flush_enum flush);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003485int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3486 struct btrfs_block_rsv *dst_rsv,
3487 u64 num_bytes);
Josef Bacikd52be812013-05-29 14:54:47 -04003488int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3489 struct btrfs_block_rsv *dest, u64 num_bytes,
3490 int min_factor);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003491void btrfs_block_rsv_release(struct btrfs_root *root,
3492 struct btrfs_block_rsv *block_rsv,
3493 u64 num_bytes);
Zhaolei868f4012015-08-05 16:43:27 +08003494int btrfs_inc_block_group_ro(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04003495 struct btrfs_block_group_cache *cache);
Zhaolei868f4012015-08-05 16:43:27 +08003496void btrfs_dec_block_group_ro(struct btrfs_root *root,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003497 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04003498void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00003499u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08003500int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3501 u64 start, u64 end);
Filipe Manana1edb647b2014-12-08 14:01:12 +00003502int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3503 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05003504int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3505 struct btrfs_root *root, u64 type);
Li Dongyangf7039b12011-03-24 10:24:28 +00003506int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08003507
liuboc59021f2011-03-07 02:13:14 +00003508int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02003509int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3510 struct btrfs_fs_info *fs_info);
Liu Bo31e50222012-11-21 14:18:10 +00003511int __get_raid_index(u64 flags);
Filipe Manana9ea24bb2014-10-29 11:57:59 +00003512int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3513void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
Filipe Manana39c2d7f2015-05-20 14:01:55 +01003514void check_system_chunk(struct btrfs_trans_handle *trans,
3515 struct btrfs_root *root,
Filipe Manana4617ea32015-06-09 17:48:21 +01003516 const u64 type);
Chris Masondee26a92007-03-26 16:00:06 -04003517/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003518int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3519 int level, int *slot);
3520int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04003521int btrfs_previous_item(struct btrfs_root *root,
3522 struct btrfs_path *path, u64 min_objectid,
3523 int type);
Wang Shilongade2e0b2014-01-12 21:38:33 +08003524int btrfs_previous_extent_item(struct btrfs_root *root,
3525 struct btrfs_path *path, u64 min_objectid);
Daniel Dresslerb7a03652014-11-12 13:43:09 +09003526void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3527 struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003528 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04003529struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3530struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04003531int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003532 struct btrfs_key *key, int lowest_level,
Eric Sandeende78b512013-01-31 18:21:12 +00003533 u64 min_trans);
Chris Mason3f157a22008-06-25 16:01:31 -04003534int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Eric Sandeende78b512013-01-31 18:21:12 +00003535 struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003536 u64 min_trans);
Alexander Block70698302012-06-05 21:07:48 +02003537enum btrfs_compare_tree_result {
3538 BTRFS_COMPARE_TREE_NEW,
3539 BTRFS_COMPARE_TREE_DELETED,
3540 BTRFS_COMPARE_TREE_CHANGED,
Josef Bacikba5e8f22013-08-16 16:52:55 -04003541 BTRFS_COMPARE_TREE_SAME,
Alexander Block70698302012-06-05 21:07:48 +02003542};
3543typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3544 struct btrfs_root *right_root,
3545 struct btrfs_path *left_path,
3546 struct btrfs_path *right_path,
3547 struct btrfs_key *key,
3548 enum btrfs_compare_tree_result result,
3549 void *ctx);
3550int btrfs_compare_trees(struct btrfs_root *left_root,
3551 struct btrfs_root *right_root,
3552 btrfs_changed_cb_t cb, void *ctx);
Chris Mason5f39d392007-10-15 16:14:19 -04003553int btrfs_cow_block(struct btrfs_trans_handle *trans,
3554 struct btrfs_root *root, struct extent_buffer *buf,
3555 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04003556 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05003557int btrfs_copy_root(struct btrfs_trans_handle *trans,
3558 struct btrfs_root *root,
3559 struct extent_buffer *buf,
3560 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003561int btrfs_block_can_be_shared(struct btrfs_root *root,
3562 struct extent_buffer *buf);
Tsutomu Itoh4b90c682013-04-16 05:18:49 +00003563void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003564 u32 data_size);
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003565void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003566 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05003567int btrfs_split_item(struct btrfs_trans_handle *trans,
3568 struct btrfs_root *root,
3569 struct btrfs_path *path,
3570 struct btrfs_key *new_key,
3571 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00003572int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3573 struct btrfs_root *root,
3574 struct btrfs_path *path,
3575 struct btrfs_key *new_key);
Kelley Nielsene33d5c32013-11-04 19:33:33 -08003576int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3577 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
Chris Masone089f052007-03-16 16:20:31 -04003578int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3579 *root, struct btrfs_key *key, struct btrfs_path *p, int
3580 ins_len, int cow);
Jan Schmidt5d9e75c42012-05-16 18:25:47 +02003581int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3582 struct btrfs_path *p, u64 time_seq);
Arne Jansen2f38b3e2011-09-13 11:18:10 +02003583int btrfs_search_slot_for_read(struct btrfs_root *root,
3584 struct btrfs_key *key, struct btrfs_path *p,
3585 int find_higher, int return_any);
Chris Mason6702ed42007-08-07 16:15:09 -04003586int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04003587 struct btrfs_root *root, struct extent_buffer *parent,
Eric Sandeende78b512013-01-31 18:21:12 +00003588 int start_slot, u64 *last_ret,
Chris Masona6b6e752007-10-15 16:22:39 -04003589 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02003590void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04003591struct btrfs_path *btrfs_alloc_path(void);
3592void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003593void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08003594void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04003595 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003596void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3597
Chris Mason85e21ba2008-01-29 15:11:36 -05003598int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3599 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05003600static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3601 struct btrfs_root *root,
3602 struct btrfs_path *path)
3603{
3604 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3605}
3606
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003607void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003608 struct btrfs_key *cpu_key, u32 *data_size,
3609 u32 total_data, u32 total_size, int nr);
Chris Masone089f052007-03-16 16:20:31 -04003610int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3611 *root, struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05003612int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3613 struct btrfs_root *root,
3614 struct btrfs_path *path,
3615 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3616
3617static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3618 struct btrfs_root *root,
3619 struct btrfs_path *path,
3620 struct btrfs_key *key,
3621 u32 data_size)
3622{
3623 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3624}
3625
Chris Mason234b63a2007-03-13 10:46:10 -04003626int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Josef Bacik16e75492013-10-22 12:18:51 -04003627int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidt3d7806e2012-06-11 08:29:29 +02003628int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3629 u64 time_seq);
Alexander Block1c8f52a2012-06-19 07:42:25 -06003630static inline int btrfs_next_old_item(struct btrfs_root *root,
3631 struct btrfs_path *p, u64 time_seq)
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003632{
3633 ++p->slots[0];
3634 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
Alexander Block1c8f52a2012-06-19 07:42:25 -06003635 return btrfs_next_old_leaf(root, p, time_seq);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003636 return 0;
3637}
Alexander Block1c8f52a2012-06-19 07:42:25 -06003638static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3639{
3640 return btrfs_next_old_item(root, p, 0);
3641}
Chris Mason5f39d392007-10-15 16:14:19 -04003642int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04003643int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3644 struct btrfs_block_rsv *block_rsv,
3645 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04003646int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3647 struct btrfs_root *root,
3648 struct extent_buffer *node,
3649 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02003650static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3651{
3652 /*
3653 * Get synced with close_ctree()
3654 */
3655 smp_mb();
3656 return fs_info->closing;
3657}
Miao Xiebabbf1702013-05-14 10:20:43 +00003658
3659/*
3660 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3661 * anything except sleeping. This function is used to check the status of
3662 * the fs.
3663 */
3664static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3665{
3666 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3667 btrfs_fs_closing(root->fs_info));
3668}
3669
David Sterba6c417612011-04-13 15:41:04 +02003670static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3671{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02003672 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02003673 kfree(fs_info->delayed_root);
3674 kfree(fs_info->extent_root);
3675 kfree(fs_info->tree_root);
3676 kfree(fs_info->chunk_root);
3677 kfree(fs_info->dev_root);
3678 kfree(fs_info->csum_root);
Arne Jansenbcef60f2011-09-13 15:23:30 +02003679 kfree(fs_info->quota_root);
Filipe David Borba Mananad8f98032013-08-24 19:51:06 +01003680 kfree(fs_info->uuid_root);
David Sterba6c417612011-04-13 15:41:04 +02003681 kfree(fs_info->super_copy);
3682 kfree(fs_info->super_for_commit);
Qu Wenruof667aef2014-09-23 13:40:08 +08003683 security_free_mnt_opts(&fs_info->security_opts);
David Sterba6c417612011-04-13 15:41:04 +02003684 kfree(fs_info);
3685}
David Sterba7841cb22011-05-31 18:07:27 +02003686
Jan Schmidt097b8a72012-06-21 11:08:04 +02003687/* tree mod log functions from ctree.c */
3688u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3689 struct seq_list *elem);
3690void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3691 struct seq_list *elem);
Jan Schmidt5b6602e2012-10-23 11:28:27 +02003692int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
Jan Schmidt097b8a72012-06-21 11:08:04 +02003693
Chris Masondee26a92007-03-26 16:00:06 -04003694/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05003695int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003696 struct btrfs_path *path,
3697 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05003698int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3699 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003700 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3701 const char *name, int name_len);
3702int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3703 struct btrfs_root *tree_root,
3704 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05003705 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04003706int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3707 struct btrfs_key *key);
3708int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3709 *root, struct btrfs_key *key, struct btrfs_root_item
3710 *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04003711int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3712 struct btrfs_root *root,
3713 struct btrfs_key *key,
3714 struct btrfs_root_item *item);
Miao Xiecb517ea2013-05-15 07:48:19 +00003715int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3716 struct btrfs_path *path, struct btrfs_root_item *root_item,
3717 struct btrfs_key *root_key);
Yan, Zheng76dda932009-09-21 16:00:26 -04003718int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00003719void btrfs_set_root_node(struct btrfs_root_item *item,
3720 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00003721void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003722void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3723 struct btrfs_root *root);
Li Zefan08fe4db2011-03-28 02:01:25 +00003724
Stefan Behrens07b30a42013-08-15 17:11:17 +02003725/* uuid-tree.c */
3726int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3727 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3728 u64 subid);
3729int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3730 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3731 u64 subid);
Stefan Behrens70f80172013-08-15 17:11:23 +02003732int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3733 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3734 u64));
Stefan Behrens07b30a42013-08-15 17:11:17 +02003735
Chris Masondee26a92007-03-26 16:00:06 -04003736/* dir-item.c */
Chris Mason9c520572012-12-17 14:26:57 -05003737int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3738 const char *name, int name_len);
Chris Masond3977122009-01-05 21:25:51 -05003739int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3740 struct btrfs_root *root, const char *name,
Miao Xie16cdcec2011-04-22 18:12:22 +08003741 int name_len, struct inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04003742 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04003743struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3744 struct btrfs_root *root,
3745 struct btrfs_path *path, u64 dir,
3746 const char *name, int name_len,
3747 int mod);
3748struct btrfs_dir_item *
3749btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3750 struct btrfs_root *root,
3751 struct btrfs_path *path, u64 dir,
3752 u64 objectid, const char *name, int name_len,
3753 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003754struct btrfs_dir_item *
3755btrfs_search_dir_index_item(struct btrfs_root *root,
3756 struct btrfs_path *path, u64 dirid,
3757 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003758int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3759 struct btrfs_root *root,
3760 struct btrfs_path *path,
3761 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05003762int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003763 struct btrfs_root *root,
3764 struct btrfs_path *path, u64 objectid,
3765 const char *name, u16 name_len,
3766 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05003767struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3768 struct btrfs_root *root,
3769 struct btrfs_path *path, u64 dir,
3770 const char *name, u16 name_len,
3771 int mod);
Josef Bacik22a94d42011-03-16 16:47:17 -04003772int verify_dir_item(struct btrfs_root *root,
3773 struct extent_buffer *leaf,
3774 struct btrfs_dir_item *dir_item);
Filipe Manana5f5bc6b2014-11-09 08:38:39 +00003775struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3776 struct btrfs_path *path,
3777 const char *name,
3778 int name_len);
Josef Bacik7b128762008-07-24 12:17:14 -04003779
3780/* orphan.c */
3781int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3782 struct btrfs_root *root, u64 offset);
3783int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3784 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003785int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04003786
Chris Masondee26a92007-03-26 16:00:06 -04003787/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05003788int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3789 struct btrfs_root *root,
3790 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003791 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05003792int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3793 struct btrfs_root *root,
3794 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003795 u64 inode_objectid, u64 ref_objectid, u64 *index);
Chris Mason5f39d392007-10-15 16:14:19 -04003796int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3797 struct btrfs_root *root,
3798 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04003799int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04003800 *root, struct btrfs_path *path,
3801 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04003802
Mark Fashehf1863732012-08-08 11:32:27 -07003803struct btrfs_inode_extref *
3804btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3805 struct btrfs_root *root,
3806 struct btrfs_path *path,
3807 const char *name, int name_len,
3808 u64 inode_objectid, u64 ref_objectid, int ins_len,
3809 int cow);
3810
3811int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3812 u64 ref_objectid, const char *name,
3813 int name_len,
3814 struct btrfs_inode_extref **extref_ret);
3815
Chris Masondee26a92007-03-26 16:00:06 -04003816/* file-item.c */
Miao Xiefacc8a222013-07-25 19:22:34 +08003817struct btrfs_dio_private;
Chris Mason459931e2008-12-10 09:10:46 -05003818int btrfs_del_csums(struct btrfs_trans_handle *trans,
3819 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04003820int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003821 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04003822int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
Miao Xie23ea8e52014-09-12 18:43:54 +08003823 struct bio *bio, u64 logical_offset);
Chris Masonb18c6682007-04-17 13:26:50 -04003824int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04003825 struct btrfs_root *root,
3826 u64 objectid, u64 pos,
3827 u64 disk_offset, u64 disk_num_bytes,
3828 u64 num_bytes, u64 offset, u64 ram_bytes,
3829 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04003830int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3831 struct btrfs_root *root,
3832 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04003833 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05003834int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05003835 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04003836 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04003837int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003838 struct bio *bio, u64 file_start, int contig);
Arne Jansena2de7332011-03-08 14:14:00 +01003839int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3840 struct list_head *list, int search_commit);
Filipe Manana7ffbb592014-06-09 03:48:05 +01003841void btrfs_extent_item_to_extent_map(struct inode *inode,
3842 const struct btrfs_path *path,
3843 struct btrfs_file_extent_item *fi,
3844 const bool new_inline,
3845 struct extent_map *em);
3846
Chris Mason39279cc2007-06-12 06:35:45 -04003847/* inode.c */
Miao Xie8ccf6f192012-10-25 09:28:04 +00003848struct btrfs_delalloc_work {
3849 struct inode *inode;
3850 int wait;
3851 int delay_iput;
3852 struct completion completion;
3853 struct list_head list;
3854 struct btrfs_work work;
3855};
3856
3857struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3858 int wait, int delay_iput);
3859void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3860
Josef Bacikb2675152011-07-18 13:21:36 -04003861struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3862 size_t pg_offset, u64 start, u64 len,
3863 int create);
Josef Bacik00361582013-08-14 14:02:47 -04003864noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
Josef Bacik7ee9e442013-06-21 16:37:03 -04003865 u64 *orig_start, u64 *orig_block_len,
3866 u64 *ram_bytes);
Chris Mason4881ee52008-07-24 09:51:08 -04003867
3868/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04003869#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04003870#define ClearPageChecked ClearPageFsMisc
3871#define SetPageChecked SetPageFsMisc
3872#define PageChecked PageFsMisc
3873#endif
3874
Li Zefanb6973aa2011-07-20 03:46:35 +00003875/* This forces readahead on a given range of bytes in an inode */
3876static inline void btrfs_force_ra(struct address_space *mapping,
3877 struct file_ra_state *ra, struct file *file,
3878 pgoff_t offset, unsigned long req_size)
3879{
3880 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3881}
3882
Chris Mason3de45862008-11-17 21:02:50 -05003883struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3884int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04003885int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3886 struct btrfs_root *root,
3887 struct inode *dir, struct inode *inode,
3888 const char *name, int name_len);
3889int btrfs_add_link(struct btrfs_trans_handle *trans,
3890 struct inode *parent_inode, struct inode *inode,
3891 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003892int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3893 struct btrfs_root *root,
3894 struct inode *dir, u64 objectid,
3895 const char *name, int name_len);
Josef Bacik2aaa6652012-08-29 14:27:18 -04003896int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3897 int front);
Chris Masone02119d2008-09-05 16:13:11 -04003898int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3899 struct btrfs_root *root,
3900 struct inode *inode, u64 new_size,
3901 u32 min_type);
3902
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003903int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Miao Xie6c255e62014-03-06 13:55:01 +08003904int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3905 int nr);
Josef Bacik2ac55d42010-02-03 19:33:23 +00003906int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3907 struct extent_state **cached_state);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003908int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Filipe David Borba Manana63541922014-01-07 11:47:46 +00003909 struct btrfs_root *new_root,
3910 struct btrfs_root *parent_root,
3911 u64 new_dirid);
David Woodhouse64a16702009-07-15 23:29:37 +01003912int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3913 size_t size, struct bio *bio,
3914 unsigned long bio_flags);
Nick Pigginc2ec1752009-03-31 15:23:21 -07003915int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04003916int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04003917void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01003918int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04003919struct inode *btrfs_alloc_inode(struct super_block *sb);
3920void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04003921int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003922int btrfs_init_cachep(void);
3923void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04003924long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05303925struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00003926 struct btrfs_root *root, int *was_new);
Chris Masona52d9a82007-08-27 16:49:44 -04003927struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +02003928 size_t pg_offset, u64 start, u64 end,
Chris Masona52d9a82007-08-27 16:49:44 -04003929 int create);
3930int btrfs_update_inode(struct btrfs_trans_handle *trans,
3931 struct btrfs_root *root,
3932 struct inode *inode);
Josef Bacikbe6aef62012-10-22 15:43:12 -04003933int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3934 struct btrfs_root *root, struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04003935int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05003936int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003937void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3938 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05003939int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003940void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003941void btrfs_add_delayed_iput(struct inode *inode);
3942void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04003943int btrfs_prealloc_file_range(struct inode *inode, int mode,
3944 u64 start, u64 num_bytes, u64 min_size,
3945 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04003946int btrfs_prealloc_file_range_trans(struct inode *inode,
3947 struct btrfs_trans_handle *trans, int mode,
3948 u64 start, u64 num_bytes, u64 min_size,
3949 loff_t actual_len, u64 *alloc_hint);
Filipe Mananab38ef712014-11-13 17:01:45 +00003950int btrfs_inode_check_errors(struct inode *inode);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04003951extern const struct dentry_operations btrfs_dentry_operations;
Josef Bacik6a3891c2015-03-16 17:38:52 -04003952#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3953void btrfs_test_inode_set_ops(struct inode *inode);
3954#endif
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04003955
3956/* ioctl.c */
3957long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02003958void btrfs_update_iflags(struct inode *inode);
3959void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Stefan Behrensdd5f9612013-08-15 17:11:20 +02003960int btrfs_is_empty_uuid(u8 *uuid);
Chris Mason4cb53002011-05-24 15:35:30 -04003961int btrfs_defrag_file(struct inode *inode, struct file *file,
3962 struct btrfs_ioctl_defrag_range_args *range,
3963 u64 newer_than, unsigned long max_pages);
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02003964void btrfs_get_block_group_info(struct list_head *groups_list,
3965 struct btrfs_ioctl_space_info *space);
Stefan Behrens35a36212013-08-14 18:12:25 +02003966void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3967 struct btrfs_ioctl_balance_args *bargs);
3968
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02003969
Chris Mason39279cc2007-06-12 06:35:45 -04003970/* file.c */
Miao Xie9247f312012-11-26 09:24:43 +00003971int btrfs_auto_defrag_init(void);
3972void btrfs_auto_defrag_exit(void);
Chris Mason4cb53002011-05-24 15:35:30 -04003973int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3974 struct inode *inode);
3975int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Miao Xie26176e72012-11-26 09:26:20 +00003976void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04003977int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Josef Bacik7014cdb2012-08-30 20:06:49 -04003978void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3979 int skip_pinned);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07003980extern const struct file_operations btrfs_file_operations;
Josef Bacik5dc562c2012-08-17 13:14:17 -04003981int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3982 struct btrfs_root *root, struct inode *inode,
3983 struct btrfs_path *path, u64 start, u64 end,
Filipe David Borba Manana1acae572014-01-07 11:42:27 +00003984 u64 *drop_end, int drop_cache,
3985 int replace_extent,
3986 u32 extent_item_size,
3987 int *key_inserted);
Josef Bacik5dc562c2012-08-17 13:14:17 -04003988int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3989 struct btrfs_root *root, struct inode *inode, u64 start,
Josef Bacik26714852012-08-29 12:24:27 -04003990 u64 end, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04003991int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04003992 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04003993int btrfs_release_file(struct inode *inode, struct file *file);
Josef Bacikbe1a12a2011-04-06 13:05:22 -04003994int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3995 struct page **pages, size_t num_pages,
3996 loff_t pos, size_t write_bytes,
3997 struct extent_state **cached);
Filipe Manana728404d2014-10-10 09:43:11 +01003998int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
Sage Weil6bf13c02008-06-10 10:07:39 -04003999
Chris Mason6702ed42007-08-07 16:15:09 -04004000/* tree-defrag.c */
4001int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
Eric Sandeende78b512013-01-31 18:21:12 +00004002 struct btrfs_root *root);
Josef Bacik58176a92007-08-29 15:47:34 -04004003
4004/* sysfs.c */
4005int btrfs_init_sysfs(void);
4006void btrfs_exit_sysfs(void);
Jeff Mahoney5ac1d202013-11-01 13:06:58 -04004007int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
4008void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
Josef Bacik58176a92007-08-29 15:47:34 -04004009
Josef Bacik5103e942007-11-16 11:45:54 -05004010/* xattr.c */
4011ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04004012
Chris Masonedbd8d42007-12-21 16:27:24 -05004013/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04004014int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04004015int btrfs_sync_fs(struct super_block *sb, int wait);
Joe Perches533574c2012-07-30 14:40:13 -07004016
4017#ifdef CONFIG_PRINTK
4018__printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004019void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
Joe Perches533574c2012-07-30 14:40:13 -07004020#else
4021static inline __printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004022void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
Joe Perches533574c2012-07-30 14:40:13 -07004023{
4024}
4025#endif
4026
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004027#define btrfs_emerg(fs_info, fmt, args...) \
4028 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4029#define btrfs_alert(fs_info, fmt, args...) \
4030 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4031#define btrfs_crit(fs_info, fmt, args...) \
4032 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4033#define btrfs_err(fs_info, fmt, args...) \
4034 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4035#define btrfs_warn(fs_info, fmt, args...) \
4036 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4037#define btrfs_notice(fs_info, fmt, args...) \
4038 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4039#define btrfs_info(fs_info, fmt, args...) \
4040 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004041
4042#ifdef DEBUG
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004043#define btrfs_debug(fs_info, fmt, args...) \
4044 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004045#else
4046#define btrfs_debug(fs_info, fmt, args...) \
4047 no_printk(KERN_DEBUG fmt, ##args)
4048#endif
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004049
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004050#ifdef CONFIG_BTRFS_ASSERT
4051
David Sterbac0d19e22015-04-24 19:11:57 +02004052__cold
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004053static inline void assfail(char *expr, char *file, int line)
4054{
Frank Holtonefe120a2013-12-20 11:37:06 -05004055 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004056 expr, file, line);
4057 BUG();
4058}
4059
4060#define ASSERT(expr) \
4061 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4062#else
4063#define ASSERT(expr) ((void)0)
4064#endif
4065
4066#define btrfs_assert()
Joe Perches533574c2012-07-30 14:40:13 -07004067__printf(5, 6)
David Sterbac0d19e22015-04-24 19:11:57 +02004068__cold
liuboacce9522011-01-06 19:30:25 +08004069void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01004070 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08004071
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04004072const char *btrfs_decode_error(int errno);
Joe Perches533574c2012-07-30 14:40:13 -07004073
David Sterbac0d19e22015-04-24 19:11:57 +02004074__cold
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004075void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4076 struct btrfs_root *root, const char *function,
4077 unsigned int line, int errno);
4078
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06004079#define btrfs_set_fs_incompat(__fs_info, opt) \
4080 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4081
4082static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4083 u64 flag)
4084{
4085 struct btrfs_super_block *disk_super;
4086 u64 features;
4087
4088 disk_super = fs_info->super_copy;
4089 features = btrfs_super_incompat_flags(disk_super);
4090 if (!(features & flag)) {
Miao Xieceda0862013-04-11 10:30:16 +00004091 spin_lock(&fs_info->super_lock);
4092 features = btrfs_super_incompat_flags(disk_super);
4093 if (!(features & flag)) {
4094 features |= flag;
4095 btrfs_set_super_incompat_flags(disk_super, features);
Frank Holtonefe120a2013-12-20 11:37:06 -05004096 btrfs_info(fs_info, "setting %llu feature flag",
Miao Xieceda0862013-04-11 10:30:16 +00004097 flag);
4098 }
4099 spin_unlock(&fs_info->super_lock);
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06004100 }
4101}
4102
Josef Bacik3173a182013-03-07 14:22:04 -05004103#define btrfs_fs_incompat(fs_info, opt) \
4104 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4105
4106static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4107{
4108 struct btrfs_super_block *disk_super;
4109 disk_super = fs_info->super_copy;
4110 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4111}
4112
David Sterba005d6422012-09-18 07:52:32 -06004113/*
4114 * Call btrfs_abort_transaction as early as possible when an error condition is
4115 * detected, that way the exact line number is reported.
4116 */
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004117#define btrfs_abort_transaction(trans, root, errno) \
4118do { \
David Sterba1a9a8a72015-04-24 19:11:54 +02004119 /* Report first abort since mount */ \
4120 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4121 &((root)->fs_info->fs_state))) { \
4122 WARN(1, KERN_DEBUG \
4123 "BTRFS: Transaction aborted (error %d)\n", \
4124 (errno)); \
4125 } \
4126 __btrfs_abort_transaction((trans), (root), __func__, \
4127 __LINE__, (errno)); \
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004128} while (0)
liuboacce9522011-01-06 19:30:25 +08004129
4130#define btrfs_std_error(fs_info, errno) \
4131do { \
4132 if ((errno)) \
Jeff Mahoney4da35112012-03-01 14:57:30 +01004133 __btrfs_std_error((fs_info), __func__, \
4134 __LINE__, (errno), NULL); \
4135} while (0)
4136
4137#define btrfs_error(fs_info, errno, fmt, args...) \
4138do { \
4139 __btrfs_std_error((fs_info), __func__, __LINE__, \
4140 (errno), fmt, ##args); \
liuboacce9522011-01-06 19:30:25 +08004141} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04004142
Joe Perches533574c2012-07-30 14:40:13 -07004143__printf(5, 6)
David Sterbac0d19e22015-04-24 19:11:57 +02004144__cold
Jeff Mahoney8c342932011-10-03 23:22:31 -04004145void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4146 unsigned int line, int errno, const char *fmt, ...);
4147
Eric Sandeenaa43a172013-01-31 00:54:55 +00004148/*
4149 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4150 * will panic(). Otherwise we BUG() here.
4151 */
Jeff Mahoney8c342932011-10-03 23:22:31 -04004152#define btrfs_panic(fs_info, errno, fmt, args...) \
4153do { \
Eric Sandeenaa43a172013-01-31 00:54:55 +00004154 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4155 BUG(); \
Chris Masoneb60cea2007-02-02 09:18:22 -05004156} while (0)
4157
4158/* acl.c */
4159#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02004160struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Christoph Hellwig996a7102013-12-20 05:16:43 -08004161int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
Chris Masoneb60cea2007-02-02 09:18:22 -05004162int btrfs_init_acl(struct btrfs_trans_handle *trans,
4163 struct inode *inode, struct inode *dir);
Li Zefan9b89d952011-07-14 03:17:39 +00004164#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10004165#define btrfs_get_acl NULL
Christoph Hellwig996a7102013-12-20 05:16:43 -08004166#define btrfs_set_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00004167static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4168 struct inode *inode, struct inode *dir)
4169{
4170 return 0;
4171}
Li Zefan9b89d952011-07-14 03:17:39 +00004172#endif
Chris Masoneb60cea2007-02-02 09:18:22 -05004173
4174/* relocation.c */
4175int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4176int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4177 struct btrfs_root *root);
4178int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4179 struct btrfs_root *root);
4180int btrfs_recover_relocation(struct btrfs_root *root);
4181int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Josef Bacik83d4cfd2013-08-30 15:09:51 -04004182int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4183 struct btrfs_root *root, struct extent_buffer *buf,
4184 struct extent_buffer *cow);
Zhaolei147d2562015-08-06 20:58:11 +08004185void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
Chris Masoneb60cea2007-02-02 09:18:22 -05004186 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004187int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Chris Masoneb60cea2007-02-02 09:18:22 -05004188 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01004189
4190/* scrub.c */
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01004191int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4192 u64 end, struct btrfs_scrub_progress *progress,
Stefan Behrens63a212a2012-11-05 18:29:28 +01004193 int readonly, int is_dev_replace);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004194void btrfs_scrub_pause(struct btrfs_root *root);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004195void btrfs_scrub_continue(struct btrfs_root *root);
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01004196int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4197int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4198 struct btrfs_device *dev);
Arne Jansena2de7332011-03-08 14:14:00 +01004199int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4200 struct btrfs_scrub_progress *progress);
4201
Miao Xiec404e0d2014-01-30 16:46:55 +08004202/* dev-replace.c */
4203void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4204void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
Miao Xie42452152014-11-25 16:39:28 +08004205void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4206
4207static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4208{
4209 btrfs_bio_counter_sub(fs_info, 1);
4210}
Miao Xiec404e0d2014-01-30 16:46:55 +08004211
Arne Jansen7414a032011-05-23 14:33:49 +02004212/* reada.c */
4213struct reada_control {
4214 struct btrfs_root *root; /* tree to prefetch */
4215 struct btrfs_key key_start;
4216 struct btrfs_key key_end; /* exclusive */
4217 atomic_t elems;
4218 struct kref refcnt;
4219 wait_queue_head_t wait;
4220};
4221struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4222 struct btrfs_key *start, struct btrfs_key *end);
4223int btrfs_reada_wait(void *handle);
4224void btrfs_reada_detach(void *handle);
4225int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4226 u64 start, int err);
4227
Jan Schmidt95a06072012-05-29 17:06:54 +02004228static inline int is_fstree(u64 rootid)
4229{
4230 if (rootid == BTRFS_FS_TREE_OBJECTID ||
Qu Wenruoe09fe2d2015-02-27 16:24:23 +08004231 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4232 !btrfs_qgroup_level(rootid)))
Jan Schmidt95a06072012-05-29 17:06:54 +02004233 return 1;
4234 return 0;
4235}
David Sterba210549e2013-02-09 23:38:06 +00004236
4237static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4238{
4239 return signal_pending(current);
4240}
4241
Josef Bacikaaedb552013-10-11 14:44:09 -04004242/* Sanity test specific functions */
4243#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4244void btrfs_test_destroy_inode(struct inode *inode);
4245#endif
David Sterba210549e2013-02-09 23:38:06 +00004246
David Sterbafccb84c2014-09-29 23:53:21 +02004247static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4248{
4249#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4250 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))
4251 return 1;
4252#endif
4253 return 0;
4254}
4255
Chris Masoneb60cea2007-02-02 09:18:22 -05004256#endif