blob: 8c58191249cc14c33c376bb0c8c0a469cb95b894 [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
David Sterbabc309462015-10-20 18:22:13 +0200826 /*
827 * usage filter
828 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
829 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
830 */
831 union {
832 __le64 usage;
833 struct {
834 __le32 usage_min;
835 __le32 usage_max;
836 };
837 };
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200838
839 /* devid filter */
840 __le64 devid;
841
842 /* devid subset filter [pstart..pend) */
843 __le64 pstart;
844 __le64 pend;
845
846 /* btrfs virtual address space subset filter [vstart..vend) */
847 __le64 vstart;
848 __le64 vend;
849
850 /*
851 * profile to convert to, single is denoted by
852 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
853 */
854 __le64 target;
855
856 /* BTRFS_BALANCE_ARGS_* */
857 __le64 flags;
858
David Sterba12907fc2015-10-10 17:16:50 +0200859 /*
860 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
861 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
862 * and maximum
863 */
864 union {
865 __le64 limit;
866 struct {
867 __le32 limit_min;
868 __le32 limit_max;
869 };
870 };
David Sterba7d824b62014-05-07 17:37:51 +0200871
Gabríel Arthúr Péturssondee32d02015-09-28 22:32:41 +0000872 /*
873 * Process chunks that cross stripes_min..stripes_max devices,
874 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
875 */
876 __le32 stripes_min;
877 __le32 stripes_max;
878
879 __le64 unused[6];
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200880} __attribute__ ((__packed__));
881
882/*
883 * store balance parameters to disk so that balance can be properly
884 * resumed after crash or unmount
885 */
886struct btrfs_balance_item {
887 /* BTRFS_BALANCE_* */
888 __le64 flags;
889
890 struct btrfs_disk_balance_args data;
891 struct btrfs_disk_balance_args meta;
892 struct btrfs_disk_balance_args sys;
893
894 __le64 unused[4];
895} __attribute__ ((__packed__));
896
Yan Zhengd899e052008-10-30 14:25:28 -0400897#define BTRFS_FILE_EXTENT_INLINE 0
898#define BTRFS_FILE_EXTENT_REG 1
899#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454df2007-04-19 13:37:44 -0400900
Chris Mason9f5fae22007-03-20 14:38:32 -0400901struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400902 /*
903 * transaction id that created this extent
904 */
Chris Mason71951f32007-03-27 09:16:29 -0400905 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400906 /*
907 * max number of bytes to hold this extent in ram
908 * when we split a compressed extent we can't know how big
909 * each of the resulting pieces will be. So, this is
910 * an upper limit on the size of the extent in ram instead of
911 * an exact limit.
912 */
913 __le64 ram_bytes;
914
915 /*
916 * 32 bits for the various ways we might encode the data,
917 * including compression and encryption. If any of these
918 * are set to something a given disk format doesn't understand
919 * it is treated like an incompat flag for reading and writing,
920 * but not for stat.
921 */
922 u8 compression;
923 u8 encryption;
924 __le16 other_encoding; /* spare for later use */
925
926 /* are we inline data or a real extent? */
Chris Mason236454df2007-04-19 13:37:44 -0400927 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400928
Chris Mason9f5fae22007-03-20 14:38:32 -0400929 /*
930 * disk space consumed by the extent, checksum blocks are included
931 * in these numbers
David Sterba7ec20af2014-07-24 17:34:58 +0200932 *
933 * At this offset in the structure, the inline extent data start.
Chris Mason9f5fae22007-03-20 14:38:32 -0400934 */
Chris Masondb945352007-10-15 16:15:53 -0400935 __le64 disk_bytenr;
936 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400937 /*
Chris Masondee26a92007-03-26 16:00:06 -0400938 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400939 * this extent record is for. This allows a file extent to point
940 * into the middle of an existing extent on disk, sharing it
941 * between two snapshots (useful if some bytes in the middle of the
942 * extent have changed
943 */
944 __le64 offset;
945 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400946 * the logical number of file blocks (no csums included). This
947 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400948 */
Chris Masondb945352007-10-15 16:15:53 -0400949 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400950
Chris Mason9f5fae22007-03-20 14:38:32 -0400951} __attribute__ ((__packed__));
952
Chris Masonf254e522007-03-29 15:15:27 -0400953struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400954 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400955} __attribute__ ((__packed__));
956
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200957struct btrfs_dev_stats_item {
958 /*
959 * grow this item struct at the end for future enhancements and keep
960 * the existing values unchanged
961 */
962 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
963} __attribute__ ((__packed__));
964
Stefan Behrense922e082012-11-05 17:26:40 +0100965#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
966#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
967#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
968#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
969#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
970#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
971#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
972
973struct btrfs_dev_replace {
974 u64 replace_state; /* see #define above */
975 u64 time_started; /* seconds since 1-Jan-1970 */
976 u64 time_stopped; /* seconds since 1-Jan-1970 */
977 atomic64_t num_write_errors;
978 atomic64_t num_uncorrectable_read_errors;
979
980 u64 cursor_left;
981 u64 committed_cursor_left;
982 u64 cursor_left_last_write_of_item;
983 u64 cursor_right;
984
985 u64 cont_reading_from_srcdev_mode; /* see #define above */
986
987 int is_valid;
988 int item_needs_writeback;
989 struct btrfs_device *srcdev;
990 struct btrfs_device *tgtdev;
991
992 pid_t lock_owner;
993 atomic_t nesting_level;
994 struct mutex lock_finishing_cancel_unmount;
995 struct mutex lock_management_lock;
996 struct mutex lock;
997
998 struct btrfs_scrub_progress scrub_progress;
999};
1000
Stefan Behrensa2bff642012-11-05 17:32:20 +01001001struct btrfs_dev_replace_item {
1002 /*
1003 * grow this item struct at the end for future enhancements and keep
1004 * the existing values unchanged
1005 */
1006 __le64 src_devid;
1007 __le64 cursor_left;
1008 __le64 cursor_right;
1009 __le64 cont_reading_from_srcdev_mode;
1010
1011 __le64 replace_state;
1012 __le64 time_started;
1013 __le64 time_stopped;
1014 __le64 num_write_errors;
1015 __le64 num_uncorrectable_read_errors;
1016} __attribute__ ((__packed__));
1017
Chris Mason0b86a832008-03-24 15:01:56 -04001018/* different types of block groups (and chunks) */
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001019#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
1020#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
1021#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1022#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1023#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1024#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1025#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
Andreas Philipp1c89cdd2013-05-11 11:12:54 +00001026#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1027#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
David Sterba36523e952014-02-07 14:34:12 +01001028#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1029 BTRFS_SPACE_INFO_GLOBAL_RSV)
Miao Xiee6ec7162013-01-17 05:38:51 +00001030
1031enum btrfs_raid_types {
1032 BTRFS_RAID_RAID10,
1033 BTRFS_RAID_RAID1,
1034 BTRFS_RAID_DUP,
1035 BTRFS_RAID_RAID0,
1036 BTRFS_RAID_SINGLE,
Chris Masone942f882013-02-20 14:06:05 -05001037 BTRFS_RAID_RAID5,
1038 BTRFS_RAID_RAID6,
Miao Xiee6ec7162013-01-17 05:38:51 +00001039 BTRFS_NR_RAID_TYPES
1040};
Chris Mason1e2677e2007-05-29 16:52:18 -04001041
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001042#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1043 BTRFS_BLOCK_GROUP_SYSTEM | \
1044 BTRFS_BLOCK_GROUP_METADATA)
1045
1046#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1047 BTRFS_BLOCK_GROUP_RAID1 | \
David Woodhouse53b381b2013-01-29 18:40:14 -05001048 BTRFS_BLOCK_GROUP_RAID5 | \
1049 BTRFS_BLOCK_GROUP_RAID6 | \
Ilya Dryomov52ba6922012-01-16 22:04:47 +02001050 BTRFS_BLOCK_GROUP_DUP | \
1051 BTRFS_BLOCK_GROUP_RAID10)
Zhao Leiffe2d202015-01-20 15:11:44 +08001052#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1053 BTRFS_BLOCK_GROUP_RAID6)
1054
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001055/*
1056 * We need a bit for restriper to be able to tell when chunks of type
1057 * SINGLE are available. This "extended" profile format is used in
1058 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1059 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1060 * to avoid remappings between two formats in future.
1061 */
1062#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1063
David Sterba36523e952014-02-07 14:34:12 +01001064/*
1065 * A fake block group type that is used to communicate global block reserve
1066 * size to userspace via the SPACE_INFO ioctl.
1067 */
1068#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1069
Ilya Dryomov899c81e2012-03-27 17:09:16 +03001070#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1071 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1072
1073static inline u64 chunk_to_extended(u64 flags)
1074{
1075 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1076 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1077
1078 return flags;
1079}
1080static inline u64 extended_to_chunk(u64 flags)
1081{
1082 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1083}
1084
Chris Mason9078a3e2007-04-26 16:46:15 -04001085struct btrfs_block_group_item {
1086 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -04001087 __le64 chunk_objectid;
1088 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -04001089} __attribute__ ((__packed__));
1090
Qu Wenruo8465ece2015-02-27 16:24:22 +08001091#define BTRFS_QGROUP_LEVEL_SHIFT 48
1092static inline u64 btrfs_qgroup_level(u64 qgroupid)
1093{
1094 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1095}
1096
Arne Jansen630dc772011-09-13 11:06:07 +02001097/*
1098 * is subvolume quota turned on?
1099 */
1100#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1101/*
Jan Schmidt2f232032013-04-25 16:04:51 +00001102 * RESCAN is set during the initialization phase
Arne Jansen630dc772011-09-13 11:06:07 +02001103 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001104#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
Arne Jansen630dc772011-09-13 11:06:07 +02001105/*
1106 * Some qgroup entries are known to be out of date,
1107 * either because the configuration has changed in a way that
1108 * makes a rescan necessary, or because the fs has been mounted
1109 * with a non-qgroup-aware version.
1110 * Turning qouta off and on again makes it inconsistent, too.
1111 */
1112#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1113
1114#define BTRFS_QGROUP_STATUS_VERSION 1
1115
1116struct btrfs_qgroup_status_item {
1117 __le64 version;
1118 /*
1119 * the generation is updated during every commit. As older
1120 * versions of btrfs are not aware of qgroups, it will be
1121 * possible to detect inconsistencies by checking the
1122 * generation on mount time
1123 */
1124 __le64 generation;
1125
1126 /* flag definitions see above */
1127 __le64 flags;
1128
1129 /*
1130 * only used during scanning to record the progress
1131 * of the scan. It contains a logical address
1132 */
Jan Schmidt2f232032013-04-25 16:04:51 +00001133 __le64 rescan;
Arne Jansen630dc772011-09-13 11:06:07 +02001134} __attribute__ ((__packed__));
1135
1136struct btrfs_qgroup_info_item {
1137 __le64 generation;
1138 __le64 rfer;
1139 __le64 rfer_cmpr;
1140 __le64 excl;
1141 __le64 excl_cmpr;
1142} __attribute__ ((__packed__));
1143
1144/* flags definition for qgroup limits */
1145#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1146#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1147#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1148#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1149#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1150#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1151
1152struct btrfs_qgroup_limit_item {
1153 /*
1154 * only updated when any of the other values change
1155 */
1156 __le64 flags;
1157 __le64 max_rfer;
1158 __le64 max_excl;
1159 __le64 rsv_rfer;
1160 __le64 rsv_excl;
1161} __attribute__ ((__packed__));
1162
Jeff Mahoneyc1895442014-05-27 12:59:57 -04001163/* For raid type sysfs entries */
1164struct raid_kobject {
1165 int raid_type;
1166 struct kobject kobj;
1167};
1168
Chris Mason6324fbf2008-03-24 15:01:59 -04001169struct btrfs_space_info {
Miao Xie26b47ff2014-01-15 20:00:54 +08001170 spinlock_t lock;
Josef Bacik6a632092009-02-20 11:00:09 -05001171
Josef Bacik89a55892010-10-14 14:52:27 -04001172 u64 total_bytes; /* total bytes in the space,
1173 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001174 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -07001175 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -05001176 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1177 transaction finishes */
1178 u64 bytes_reserved; /* total bytes the allocator has reserved for
1179 current allocations */
Josef Bacik6a632092009-02-20 11:00:09 -05001180 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -04001181 delalloc/allocations */
Miao Xie26b47ff2014-01-15 20:00:54 +08001182 u64 bytes_readonly; /* total bytes that are read only */
1183
Josef Bacik4f4db212015-09-29 11:40:47 -04001184 u64 max_extent_size; /* This will hold the maximum extent size of
1185 the space info if we had an ENOSPC in the
1186 allocator. */
1187
Miao Xie26b47ff2014-01-15 20:00:54 +08001188 unsigned int full:1; /* indicates that we cannot allocate any more
1189 chunks for this space */
1190 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1191
1192 unsigned int flush:1; /* set if we are trying to make space */
1193
1194 unsigned int force_alloc; /* set if we need to force a chunk
1195 alloc for this space */
1196
Yan, Zhengb742bb82010-05-16 10:46:24 -04001197 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -04001198 u64 disk_total; /* total bytes on disk, takes mirrors into
1199 account */
Josef Bacik6a632092009-02-20 11:00:09 -05001200
Miao Xie26b47ff2014-01-15 20:00:54 +08001201 u64 flags;
1202
Chris Mason36e39c42011-03-12 07:08:42 -05001203 /*
Josef Bacikb150a4f2013-06-19 15:00:04 -04001204 * bytes_pinned is kept in line with what is actually pinned, as in
1205 * we've called update_block_group and dropped the bytes_used counter
1206 * and increased the bytes_pinned counter. However this means that
1207 * bytes_pinned does not reflect the bytes that will be pinned once the
1208 * delayed refs are flushed, so this counter is inc'ed everytime we call
1209 * btrfs_free_extent so it is a realtime count of what will be freed
1210 * once the transaction is committed. It will be zero'ed everytime the
1211 * transaction commits.
1212 */
1213 struct percpu_counter total_bytes_pinned;
1214
Chris Mason6324fbf2008-03-24 15:01:59 -04001215 struct list_head list;
Filipe Manana75c68e92015-01-16 13:24:40 +00001216 /* Protected by the spinlock 'lock'. */
Josef Bacik633c0aa2014-10-31 09:49:34 -04001217 struct list_head ro_bgs;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001218
Miao Xie26b47ff2014-01-15 20:00:54 +08001219 struct rw_semaphore groups_sem;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001220 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -04001221 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacikfdb5eff2011-06-07 16:07:44 -04001222 wait_queue_head_t wait;
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001223
1224 struct kobject kobj;
Jeff Mahoneyc1895442014-05-27 12:59:57 -04001225 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -04001226};
1227
Miao Xie66d8f3d2012-09-06 04:02:28 -06001228#define BTRFS_BLOCK_RSV_GLOBAL 1
1229#define BTRFS_BLOCK_RSV_DELALLOC 2
1230#define BTRFS_BLOCK_RSV_TRANS 3
1231#define BTRFS_BLOCK_RSV_CHUNK 4
1232#define BTRFS_BLOCK_RSV_DELOPS 5
1233#define BTRFS_BLOCK_RSV_EMPTY 6
1234#define BTRFS_BLOCK_RSV_TEMP 7
1235
Yan, Zhengf0486c62010-05-16 10:46:25 -04001236struct btrfs_block_rsv {
1237 u64 size;
1238 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001239 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001240 spinlock_t lock;
Miao Xie66d8f3d2012-09-06 04:02:28 -06001241 unsigned short full;
1242 unsigned short type;
1243 unsigned short failfast;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001244};
1245
Chris Masonfa9c0d792009-04-03 09:47:43 -04001246/*
1247 * free clusters are used to claim free space in relatively large chunks,
1248 * allowing us to do less seeky writes. They are used for all metadata
1249 * allocations and data allocations in ssd mode.
1250 */
1251struct btrfs_free_cluster {
1252 spinlock_t lock;
1253 spinlock_t refill_lock;
1254 struct rb_root root;
1255
1256 /* largest extent in this cluster */
1257 u64 max_size;
1258
1259 /* first extent starting offset */
1260 u64 window_start;
1261
Josef Bacikc759c4e2015-10-02 15:25:10 -04001262 /* We did a full search and couldn't create a cluster */
1263 bool fragmented;
1264
Chris Masonfa9c0d792009-04-03 09:47:43 -04001265 struct btrfs_block_group_cache *block_group;
1266 /*
1267 * when a cluster is allocated from a block group, we put the
1268 * cluster onto a list in the block group so that it can
1269 * be freed before the block group is freed.
1270 */
1271 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -04001272};
1273
Josef Bacik817d52f2009-07-13 21:29:25 -04001274enum btrfs_caching_type {
1275 BTRFS_CACHE_NO = 0,
1276 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -05001277 BTRFS_CACHE_FAST = 2,
1278 BTRFS_CACHE_FINISHED = 3,
Josef Bacik36cce922013-08-05 11:15:21 -04001279 BTRFS_CACHE_ERROR = 4,
Josef Bacik817d52f2009-07-13 21:29:25 -04001280};
1281
Josef Bacik0af3d002010-06-21 14:48:16 -04001282enum btrfs_disk_cache_state {
1283 BTRFS_DC_WRITTEN = 0,
1284 BTRFS_DC_ERROR = 1,
1285 BTRFS_DC_CLEAR = 2,
1286 BTRFS_DC_SETUP = 3,
Josef Bacik0af3d002010-06-21 14:48:16 -04001287};
1288
Yan Zheng11833d62009-09-11 16:11:19 -04001289struct btrfs_caching_control {
1290 struct list_head list;
1291 struct mutex mutex;
1292 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001293 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -04001294 struct btrfs_block_group_cache *block_group;
1295 u64 progress;
1296 atomic_t count;
1297};
1298
Chris Mason4c6d1d82015-04-06 13:17:20 -07001299struct btrfs_io_ctl {
1300 void *cur, *orig;
1301 struct page *page;
1302 struct page **pages;
1303 struct btrfs_root *root;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001304 struct inode *inode;
Chris Mason4c6d1d82015-04-06 13:17:20 -07001305 unsigned long size;
1306 int index;
1307 int num_pages;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001308 int entries;
1309 int bitmaps;
Chris Mason4c6d1d82015-04-06 13:17:20 -07001310 unsigned check_crcs:1;
1311};
1312
Chris Mason9078a3e2007-04-26 16:46:15 -04001313struct btrfs_block_group_cache {
1314 struct btrfs_key key;
1315 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -04001316 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -04001317 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -04001318 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -05001319 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -04001320 u64 reserved;
Miao Xiee570fd22014-06-19 10:42:50 +08001321 u64 delalloc_bytes;
Josef Bacik1b2da372009-09-11 16:11:20 -04001322 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -04001323 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -04001324 u64 sectorsize;
Josef Bacik5b0e95b2011-10-06 08:58:24 -04001325 u64 cache_generation;
David Woodhouse53b381b2013-01-29 18:40:14 -05001326
Miao Xiee570fd22014-06-19 10:42:50 +08001327 /*
1328 * It is just used for the delayed data space allocation because
1329 * only the data space allocation and the relative metadata update
1330 * can be done cross the transaction.
1331 */
1332 struct rw_semaphore data_rwsem;
1333
David Woodhouse53b381b2013-01-29 18:40:14 -05001334 /* for raid56, this is a full stripe, without parity */
1335 unsigned long full_stripe_len;
1336
Zhaolei868f4012015-08-05 16:43:27 +08001337 unsigned int ro;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +00001338 unsigned int iref:1;
Filipe Manana4f69cb92014-11-26 15:28:51 +00001339 unsigned int has_caching_ctl:1;
Filipe Manana04216822014-11-27 21:14:15 +00001340 unsigned int removed:1;
Josef Bacik0af3d002010-06-21 14:48:16 -04001341
1342 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001343
Josef Bacik817d52f2009-07-13 21:29:25 -04001344 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -04001345 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -04001346 struct btrfs_caching_control *caching_ctl;
1347 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -04001348
Josef Bacik0f9dd462008-09-23 13:14:11 -04001349 struct btrfs_space_info *space_info;
1350
1351 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +08001352 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001353
1354 /* block group cache stuff */
1355 struct rb_node cache_node;
1356
1357 /* for block groups in the same raid type */
1358 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -05001359
1360 /* usage count */
1361 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -04001362
1363 /* List of struct btrfs_free_clusters for this block group.
1364 * Today it will only have one thing on it, but that may change
1365 */
1366 struct list_head cluster_list;
Josef Bacikea658ba2012-09-11 16:57:25 -04001367
Josef Bacik47ab2a62014-09-18 11:20:02 -04001368 /* For delayed block group creation or deletion of empty block groups */
1369 struct list_head bg_list;
Josef Bacik633c0aa2014-10-31 09:49:34 -04001370
1371 /* For read-only block groups */
1372 struct list_head ro_list;
Filipe Manana04216822014-11-27 21:14:15 +00001373
1374 atomic_t trimming;
Josef Bacikce93ec52014-11-17 15:45:48 -05001375
1376 /* For dirty block groups */
1377 struct list_head dirty_list;
Chris Masonc9dc4c62015-04-04 17:14:42 -07001378 struct list_head io_list;
1379
1380 struct btrfs_io_ctl io_ctl;
Chris Mason9078a3e2007-04-26 16:46:15 -04001381};
Chris Mason0b86a832008-03-24 15:01:56 -04001382
Jan Schmidt097b8a72012-06-21 11:08:04 +02001383/* delayed seq elem */
1384struct seq_list {
1385 struct list_head list;
1386 u64 seq;
1387};
1388
David Sterba3284da72015-02-25 15:47:32 +01001389#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1390
Josef Bacik5d803662013-02-07 16:06:02 -05001391enum btrfs_orphan_cleanup_state {
1392 ORPHAN_CLEANUP_STARTED = 1,
1393 ORPHAN_CLEANUP_DONE = 2,
1394};
1395
David Woodhouse53b381b2013-01-29 18:40:14 -05001396/* used by the raid56 code to lock stripes for read/modify/write */
1397struct btrfs_stripe_hash {
1398 struct list_head hash_list;
1399 wait_queue_head_t wait;
1400 spinlock_t lock;
1401};
1402
1403/* used by the raid56 code to lock stripes for read/modify/write */
1404struct btrfs_stripe_hash_table {
Chris Mason4ae10b32013-01-31 14:42:09 -05001405 struct list_head stripe_cache;
1406 spinlock_t cache_lock;
1407 int cache_size;
1408 struct btrfs_stripe_hash table[];
David Woodhouse53b381b2013-01-29 18:40:14 -05001409};
1410
1411#define BTRFS_STRIPE_HASH_TABLE_BITS 11
1412
Miao Xie21c7e752014-05-13 17:29:04 -07001413void btrfs_init_async_reclaim_work(struct work_struct *work);
1414
Jan Schmidt097b8a72012-06-21 11:08:04 +02001415/* fs_info */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001416struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -04001417struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -04001418struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001419struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +08001420struct btrfs_delayed_root;
Chris Mason9f5fae22007-03-20 14:38:32 -04001421struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -04001422 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -04001423 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -04001424 struct btrfs_root *extent_root;
1425 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -04001426 struct btrfs_root *chunk_root;
1427 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -05001428 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -05001429 struct btrfs_root *csum_root;
Arne Jansen416ac512011-09-13 12:56:09 +02001430 struct btrfs_root *quota_root;
Stefan Behrensf7a81ea2013-08-15 17:11:19 +02001431 struct btrfs_root *uuid_root;
Chris Masone02119d2008-09-05 16:13:11 -04001432
1433 /* the log root tree is a directory of all the other log roots */
1434 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001435
1436 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -04001437 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -04001438
Josef Bacik0f9dd462008-09-23 13:14:11 -04001439 /* block group cache stuff */
1440 spinlock_t block_group_cache_lock;
Liu Boa1897fd2012-12-27 09:01:23 +00001441 u64 first_logical_byte;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001442 struct rb_root block_group_cache_tree;
1443
Josef Bacik2bf64752011-09-26 17:12:22 -04001444 /* keep track of unallocated space */
1445 spinlock_t free_chunk_lock;
1446 u64 free_chunk_space;
1447
Yan Zheng11833d62009-09-11 16:11:19 -04001448 struct extent_io_tree freed_extents[2];
1449 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -04001450
Chris Mason0b86a832008-03-24 15:01:56 -04001451 /* logical->physical extent mapping */
1452 struct btrfs_mapping_tree mapping_tree;
1453
Miao Xie16cdcec2011-04-22 18:12:22 +08001454 /*
1455 * block reservation for extent, checksum, root tree and
1456 * delayed dir index item
1457 */
Yan, Zhengf0486c62010-05-16 10:46:25 -04001458 struct btrfs_block_rsv global_block_rsv;
1459 /* block reservation for delay allocation */
1460 struct btrfs_block_rsv delalloc_block_rsv;
1461 /* block reservation for metadata operations */
1462 struct btrfs_block_rsv trans_block_rsv;
1463 /* block reservation for chunk tree */
1464 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -04001465 /* block reservation for delayed operations */
1466 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001467
1468 struct btrfs_block_rsv empty_block_rsv;
1469
Chris Mason293ffd52007-03-20 15:57:25 -04001470 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -04001471 u64 last_trans_committed;
Josef Bacik0a2b2a82014-01-23 10:54:11 -05001472 u64 avg_delayed_ref_runtime;
Chris Mason12fcfd22009-03-24 10:24:20 -04001473
1474 /*
1475 * this is updated to the current trans every time a full commit
1476 * is required instead of the faster short fsync log commits
1477 */
1478 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +02001479 unsigned long mount_opt;
David Sterba572d9ab2014-02-05 15:26:17 +01001480 /*
1481 * Track requests for actions that need to be done during transaction
1482 * commit (like for some mount options).
1483 */
1484 unsigned long pending_changes;
Li Zefan261507a02010-12-17 14:21:50 +08001485 unsigned long compress_type:4;
David Sterba8b87dc12013-08-01 18:14:52 +02001486 int commit_interval;
Miao Xie8c6a3ee2013-01-29 10:05:05 +00001487 /*
1488 * It is a suggestive number, the read side is safe even it gets a
1489 * wrong number because we will write out the data into a regular
1490 * extent. The write side(mount/remount) is under ->s_umount lock,
1491 * so it is also safe.
1492 */
Chris Mason6f568d32008-01-29 16:03:38 -05001493 u64 max_inline;
Miao Xiec018dae2013-01-29 10:07:33 +00001494 /*
1495 * Protected by ->chunk_mutex and sb->s_umount.
1496 *
1497 * The reason that we use two lock to protect it is because only
1498 * remount and mount operations can change it and these two operations
1499 * are under sb->s_umount, but the read side (chunk allocation) can not
1500 * acquire sb->s_umount or the deadlock would happen. So we use two
1501 * locks to protect it. On the write side, we must acquire two locks,
1502 * and on the read side, we just need acquire one of them.
1503 */
Chris Mason8f662a72008-01-02 10:01:11 -05001504 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -04001505 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001506 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -04001507 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -04001508 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -05001509 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -04001510
Miao Xieceda0862013-04-11 10:30:16 +00001511 /*
1512 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1513 * when they are updated.
1514 *
1515 * Because we do not clear the flags for ever, so we needn't use
1516 * the lock on the read side.
1517 *
1518 * We also needn't use the lock when we mount the fs, because
1519 * there is no other task which will update the flag.
1520 */
1521 spinlock_t super_lock;
David Sterba6c417612011-04-13 15:41:04 +02001522 struct btrfs_super_block *super_copy;
1523 struct btrfs_super_block *super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -04001524 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -04001525 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -04001526 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -04001527 struct backing_dev_info bdi;
Chris Masone02119d2008-09-05 16:13:11 -04001528 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -04001529 struct mutex transaction_kthread_mutex;
1530 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -04001531 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -04001532 struct mutex volume_mutex;
David Woodhouse53b381b2013-01-29 18:40:14 -05001533
Chris Mason1bbc6212015-04-06 12:46:08 -07001534 /*
1535 * this is taken to make sure we don't set block groups ro after
1536 * the free space cache has been allocated on them
1537 */
1538 struct mutex ro_block_group_mutex;
1539
David Woodhouse53b381b2013-01-29 18:40:14 -05001540 /* this is used during read/modify/write to make sure
1541 * no two ios are trying to mod the same stripe at the same
1542 * time
1543 */
1544 struct btrfs_stripe_hash_table *stripe_hash_table;
1545
Chris Mason5a3f23d2009-03-31 13:27:11 -04001546 /*
1547 * this protects the ordered operations list only while we are
1548 * processing all of the entries on it. This way we make
1549 * sure the commit code doesn't find the list temporarily empty
1550 * because another function happens to be doing non-waiting preflush
1551 * before jumping into the main commit.
1552 */
1553 struct mutex ordered_operations_mutex;
Josef Bacik9ffba8c2013-08-14 11:33:56 -04001554
Josef Bacik9e351cc2014-03-13 15:42:13 -04001555 struct rw_semaphore commit_root_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001556
Yan, Zhengc71bf092009-11-12 09:34:40 +00001557 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001558
Yan, Zhengc71bf092009-11-12 09:34:40 +00001559 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001560 struct srcu_struct subvol_srcu;
1561
Josef Bacika4abeea2011-04-11 17:25:13 -04001562 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -04001563 /*
1564 * the reloc mutex goes with the trans lock, it is taken
1565 * during commit to protect us from the relocation code
1566 */
1567 struct mutex reloc_mutex;
1568
Chris Mason8fd17792007-04-19 21:01:03 -04001569 struct list_head trans_list;
Chris Masonfacda1e2007-06-08 18:11:48 -04001570 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -04001571 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -04001572
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001573 spinlock_t delayed_iput_lock;
1574 struct list_head delayed_iputs;
Zhao Leid7c15172015-02-26 10:49:20 +08001575 struct rw_semaphore delayed_iput_sem;
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001576
Jan Schmidtf29021b2012-05-16 17:55:38 +02001577 /* this protects tree_mod_seq_list */
1578 spinlock_t tree_mod_seq_lock;
Jan Schmidtfc36ed7e2013-04-24 16:57:33 +00001579 atomic64_t tree_mod_seq;
Jan Schmidtf29021b2012-05-16 17:55:38 +02001580 struct list_head tree_mod_seq_list;
1581
1582 /* this protects tree_mod_log */
1583 rwlock_t tree_mod_log_lock;
1584 struct rb_root tree_mod_log;
1585
Chris Masoncb03c742008-05-15 16:15:45 -04001586 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -04001587 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -04001588 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -05001589 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -04001590 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -04001591
Chris Mason8b712842008-06-11 16:50:36 -04001592 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001593 * this is used to protect the following list -- ordered_roots.
Chris Mason3eaa2882008-07-24 11:57:52 -04001594 */
Miao Xie199c2a92013-05-15 07:48:23 +00001595 spinlock_t ordered_root_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001596
1597 /*
Miao Xie199c2a92013-05-15 07:48:23 +00001598 * all fs/file tree roots in which there are data=ordered extents
1599 * pending writeback are added into this list.
1600 *
Chris Mason5a3f23d2009-03-31 13:27:11 -04001601 * these can span multiple transactions and basically include
1602 * every dirty data page that isn't from nodatacow
1603 */
Miao Xie199c2a92013-05-15 07:48:23 +00001604 struct list_head ordered_roots;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001605
Miao Xie573bfb72014-03-06 13:55:03 +08001606 struct mutex delalloc_root_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001607 spinlock_t delalloc_root_lock;
1608 /* all fs/file tree roots that have delalloc inodes. */
1609 struct list_head delalloc_roots;
Chris Mason3eaa2882008-07-24 11:57:52 -04001610
1611 /*
Chris Mason8b712842008-06-11 16:50:36 -04001612 * there is a pool of worker threads for checksumming during writes
1613 * and a pool for checksumming after reads. This is because readers
1614 * can run with FS locks held, and the writers may be waiting for
1615 * those locks. We don't want ordering in the pending list to cause
1616 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -04001617 *
1618 * A third pool does submit_bio to avoid deadlocking with the other
1619 * two
Chris Mason8b712842008-06-11 16:50:36 -04001620 */
Qu Wenruod458b052014-02-28 10:46:19 +08001621 struct btrfs_workqueue *workers;
1622 struct btrfs_workqueue *delalloc_workers;
1623 struct btrfs_workqueue *flush_workers;
1624 struct btrfs_workqueue *endio_workers;
1625 struct btrfs_workqueue *endio_meta_workers;
1626 struct btrfs_workqueue *endio_raid56_workers;
Miao Xie8b110e32014-09-12 18:44:03 +08001627 struct btrfs_workqueue *endio_repair_workers;
Qu Wenruod458b052014-02-28 10:46:19 +08001628 struct btrfs_workqueue *rmw_workers;
1629 struct btrfs_workqueue *endio_meta_write_workers;
1630 struct btrfs_workqueue *endio_write_workers;
1631 struct btrfs_workqueue *endio_freespace_worker;
1632 struct btrfs_workqueue *submit_workers;
1633 struct btrfs_workqueue *caching_workers;
1634 struct btrfs_workqueue *readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001635
Chris Mason247e7432008-07-17 12:53:51 -04001636 /*
1637 * fixup workers take dirty pages that didn't properly go through
1638 * the cow mechanism and make them safe to write. It happens
1639 * for the sys_munmap function call path
1640 */
Qu Wenruod458b052014-02-28 10:46:19 +08001641 struct btrfs_workqueue *fixup_workers;
1642 struct btrfs_workqueue *delayed_workers;
Chris Masona79b7d42014-05-22 16:18:52 -07001643
1644 /* the extent workers do delayed refs on the extent allocation tree */
1645 struct btrfs_workqueue *extent_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001646 struct task_struct *transaction_kthread;
1647 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001648 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001649
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04001650 struct kobject *space_info_kobj;
Chris Masone66f7092007-04-20 13:16:02 -04001651 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001652 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001653 int log_root_recovering;
Josef Bacik47ab2a62014-09-18 11:20:02 -04001654 int open;
Chris Mason62e27492007-03-15 12:56:47 -04001655
Yan324ae4d2007-11-16 14:57:08 -05001656 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001657
Miao Xiee2d84522013-01-29 10:09:20 +00001658 /* used to keep from writing metadata until there is a nice batch */
1659 struct percpu_counter dirty_metadata_bytes;
Miao Xie963d6782013-01-29 10:10:51 +00001660 struct percpu_counter delalloc_bytes;
Miao Xiee2d84522013-01-29 10:09:20 +00001661 s32 dirty_metadata_batch;
Miao Xie963d6782013-01-29 10:10:51 +00001662 s32 delalloc_batch;
1663
Chris Mason0b86a832008-03-24 15:01:56 -04001664 struct list_head dirty_cowonly_roots;
1665
Chris Mason8a4b83c2008-03-24 15:02:07 -04001666 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001667
1668 /*
1669 * the space_info list is almost entirely read only. It only changes
1670 * when we add a new raid type to the FS, and that happens
1671 * very rarely. RCU is used to protect it.
1672 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001673 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001674
Li Zefanb4d7c3c2012-07-09 20:21:07 -06001675 struct btrfs_space_info *data_sinfo;
1676
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001677 struct reloc_control *reloc_ctl;
1678
Chris Masonfa9c0d792009-04-03 09:47:43 -04001679 /* data_alloc_cluster is only used in ssd mode */
1680 struct btrfs_free_cluster data_alloc_cluster;
1681
1682 /* all metadata allocations go through this cluster */
1683 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001684
Chris Mason4cb53002011-05-24 15:35:30 -04001685 /* auto defrag inodes go here */
1686 spinlock_t defrag_inodes_lock;
1687 struct rb_root defrag_inodes;
1688 atomic_t defrag_running;
1689
Miao Xiede98ced2013-01-29 10:13:12 +00001690 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1691 seqlock_t profiles_lock;
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001692 /*
1693 * these three are in extended format (availability of single
1694 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1695 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1696 */
Chris Masond18a2c42008-04-04 15:40:00 -04001697 u64 avail_data_alloc_bits;
1698 u64 avail_metadata_alloc_bits;
1699 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -04001700
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001701 /* restriper state */
1702 spinlock_t balance_lock;
1703 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001704 atomic_t balance_running;
1705 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +02001706 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001707 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001708 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001709
Josef Bacik97e728d2009-04-21 17:40:57 -04001710 unsigned data_chunk_allocations;
1711 unsigned metadata_ratio;
1712
Chris Mason788f20e2008-04-28 15:29:42 -04001713 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001714
Arne Jansena2de7332011-03-08 14:14:00 +01001715 /* private scrub information */
1716 struct mutex scrub_lock;
1717 atomic_t scrubs_running;
1718 atomic_t scrub_pause_req;
1719 atomic_t scrubs_paused;
1720 atomic_t scrub_cancel_req;
1721 wait_queue_head_t scrub_pause_wait;
Arne Jansena2de7332011-03-08 14:14:00 +01001722 int scrub_workers_refcnt;
Qu Wenruod458b052014-02-28 10:46:19 +08001723 struct btrfs_workqueue *scrub_workers;
1724 struct btrfs_workqueue *scrub_wr_completion_workers;
1725 struct btrfs_workqueue *scrub_nocow_workers;
Zhao Lei20b2e302015-06-04 20:09:15 +08001726 struct btrfs_workqueue *scrub_parity_workers;
Arne Jansena2de7332011-03-08 14:14:00 +01001727
Stefan Behrens21adbd52011-11-09 13:44:05 +01001728#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1729 u32 check_integrity_print_mask;
1730#endif
Arne Jansen416ac512011-09-13 12:56:09 +02001731 /*
1732 * quota information
1733 */
1734 unsigned int quota_enabled:1;
1735
1736 /*
1737 * quota_enabled only changes state after a commit. This holds the
1738 * next state.
1739 */
1740 unsigned int pending_quota_state:1;
1741
1742 /* is qgroup tracking in a consistent state? */
1743 u64 qgroup_flags;
1744
1745 /* holds configuration and tracking. Protected by qgroup_lock */
1746 struct rb_root qgroup_tree;
Josef Bacikfcebe452014-05-13 17:30:47 -07001747 struct rb_root qgroup_op_tree;
Arne Jansen416ac512011-09-13 12:56:09 +02001748 spinlock_t qgroup_lock;
Josef Bacikfcebe452014-05-13 17:30:47 -07001749 spinlock_t qgroup_op_lock;
1750 atomic_t qgroup_op_seq;
Arne Jansen416ac512011-09-13 12:56:09 +02001751
Wang Shilong1e8f9152013-05-06 11:03:27 +00001752 /*
1753 * used to avoid frequently calling ulist_alloc()/ulist_free()
1754 * when doing qgroup accounting, it must be protected by qgroup_lock.
1755 */
1756 struct ulist *qgroup_ulist;
1757
Wang Shilongf2f6ed32013-04-07 10:50:16 +00001758 /* protect user change for quota operations */
1759 struct mutex qgroup_ioctl_lock;
1760
Arne Jansen416ac512011-09-13 12:56:09 +02001761 /* list of dirty qgroups to be written at next commit */
1762 struct list_head dirty_qgroups;
1763
Qu Wenruoe69bcee2015-04-17 10:23:16 +08001764 /* used by qgroup for an efficient tree traversal */
Arne Jansen416ac512011-09-13 12:56:09 +02001765 u64 qgroup_seq;
Stefan Behrens21adbd52011-11-09 13:44:05 +01001766
Jan Schmidt2f232032013-04-25 16:04:51 +00001767 /* qgroup rescan items */
1768 struct mutex qgroup_rescan_lock; /* protects the progress item */
1769 struct btrfs_key qgroup_rescan_progress;
Qu Wenruod458b052014-02-28 10:46:19 +08001770 struct btrfs_workqueue *qgroup_rescan_workers;
Jan Schmidt57254b6e2013-05-06 19:14:17 +00001771 struct completion qgroup_rescan_completion;
Jan Schmidtb382a322013-05-28 15:47:24 +00001772 struct btrfs_work qgroup_rescan_work;
Jan Schmidt2f232032013-04-25 16:04:51 +00001773
liuboacce9522011-01-06 19:30:25 +08001774 /* filesystem state */
Miao Xie87533c42013-01-29 10:14:48 +00001775 unsigned long fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001776
1777 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001778
Arne Jansen90519d62011-05-23 14:30:00 +02001779 /* readahead tree */
1780 spinlock_t reada_lock;
1781 struct radix_tree_root reada_tree;
Chris Mason531f4b1a2011-11-06 03:05:08 -05001782
Josef Bacikf28491e2013-12-16 13:24:27 -05001783 /* Extent buffer radix tree */
1784 spinlock_t buffer_lock;
1785 struct radix_tree_root buffer_radix;
1786
Chris Masonaf31f5e2011-11-03 15:17:42 -04001787 /* next backup root to be overwritten */
1788 int backup_root_index;
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02001789
1790 int num_tolerated_disk_barrier_failures;
Stefan Behrense922e082012-11-05 17:26:40 +01001791
1792 /* device replace state */
1793 struct btrfs_dev_replace dev_replace;
Stefan Behrens5ac00ad2012-11-05 17:54:08 +01001794
1795 atomic_t mutually_exclusive_operation_running;
Stefan Behrens803b2f52013-08-15 17:11:21 +02001796
Miao Xiec404e0d2014-01-30 16:46:55 +08001797 struct percpu_counter bio_counter;
1798 wait_queue_head_t replace_wait;
1799
Stefan Behrens803b2f52013-08-15 17:11:21 +02001800 struct semaphore uuid_tree_rescan_sem;
Stefan Behrens70f80172013-08-15 17:11:23 +02001801 unsigned int update_uuid_tree_gen:1;
Miao Xie21c7e752014-05-13 17:29:04 -07001802
1803 /* Used to reclaim the metadata space in the background. */
1804 struct work_struct async_reclaim_work;
Josef Bacik47ab2a62014-09-18 11:20:02 -04001805
1806 spinlock_t unused_bgs_lock;
1807 struct list_head unused_bgs;
Filipe Mananad4b450c2015-01-29 19:18:25 +00001808 struct mutex unused_bg_unpin_mutex;
Filipe Manana67c5e7d2015-06-11 00:58:53 +01001809 struct mutex delete_unused_bgs_mutex;
Qu Wenruof667aef2014-09-23 13:40:08 +08001810
1811 /* For btrfs to record security options */
1812 struct security_mnt_opts security_opts;
Filipe Manana04216822014-11-27 21:14:15 +00001813
1814 /*
1815 * Chunks that can't be freed yet (under a trim/discard operation)
1816 * and will be latter freed. Protected by fs_info->chunk_mutex.
1817 */
1818 struct list_head pinned_chunks;
Yan324ae4d2007-11-16 14:57:08 -05001819};
Chris Mason0b86a832008-03-24 15:01:56 -04001820
Miao Xie8257b2d2014-03-06 13:38:19 +08001821struct btrfs_subvolume_writers {
1822 struct percpu_counter counter;
1823 wait_queue_head_t wait;
1824};
1825
Chris Mason62e27492007-03-15 12:56:47 -04001826/*
Miao Xie27cdeb72014-04-02 19:51:05 +08001827 * The state of btrfs root
1828 */
1829/*
1830 * btrfs_record_root_in_trans is a multi-step process,
1831 * and it can race with the balancing code. But the
1832 * race is very small, and only the first time the root
1833 * is added to each transaction. So IN_TRANS_SETUP
1834 * is used to tell us when more checks are required
1835 */
1836#define BTRFS_ROOT_IN_TRANS_SETUP 0
1837#define BTRFS_ROOT_REF_COWS 1
1838#define BTRFS_ROOT_TRACK_DIRTY 2
1839#define BTRFS_ROOT_IN_RADIX 3
1840#define BTRFS_ROOT_DUMMY_ROOT 4
1841#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1842#define BTRFS_ROOT_DEFRAG_RUNNING 6
1843#define BTRFS_ROOT_FORCE_COW 7
1844#define BTRFS_ROOT_MULTI_LOG_TASKS 8
Josef Bacike7070be2014-12-16 08:54:43 -08001845#define BTRFS_ROOT_DIRTY 9
Miao Xie27cdeb72014-04-02 19:51:05 +08001846
1847/*
Chris Mason62e27492007-03-15 12:56:47 -04001848 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001849 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001850 */
1851struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001852 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001853
Chris Mason5f39d392007-10-15 16:14:19 -04001854 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001855 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001856 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001857
Miao Xie27cdeb72014-04-02 19:51:05 +08001858 unsigned long state;
Chris Mason62e27492007-03-15 12:56:47 -04001859 struct btrfs_root_item root_item;
1860 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001861 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001862 struct extent_io_tree dirty_log_pages;
1863
Chris Masona2135012008-06-25 16:01:30 -04001864 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001865
Yan, Zhengf0486c62010-05-16 10:46:25 -04001866 spinlock_t accounting_lock;
1867 struct btrfs_block_rsv *block_rsv;
1868
Li Zefan581bb052011-04-20 10:06:11 +08001869 /* free ino cache stuff */
Li Zefan581bb052011-04-20 10:06:11 +08001870 struct btrfs_free_space_ctl *free_ino_ctl;
David Sterba57cdc8d2014-02-05 02:37:48 +01001871 enum btrfs_caching_type ino_cache_state;
1872 spinlock_t ino_cache_lock;
1873 wait_queue_head_t ino_cache_wait;
Li Zefan581bb052011-04-20 10:06:11 +08001874 struct btrfs_free_space_ctl *free_ino_pinned;
David Sterba57cdc8d2014-02-05 02:37:48 +01001875 u64 ino_cache_progress;
1876 struct inode *ino_cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001877
Chris Masone02119d2008-09-05 16:13:11 -04001878 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001879 wait_queue_head_t log_writer_wait;
1880 wait_queue_head_t log_commit_wait[2];
Miao Xie8b050d32014-02-20 18:08:58 +08001881 struct list_head log_ctxs[2];
Yan Zheng7237f182009-01-21 12:54:03 -05001882 atomic_t log_writers;
1883 atomic_t log_commit[2];
Miao Xie2ecb7922012-09-06 04:04:27 -06001884 atomic_t log_batch;
Miao Xiebb14a592014-02-20 18:08:56 +08001885 int log_transid;
Miao Xied1433de2014-02-20 18:08:59 +08001886 /* No matter the commit succeeds or not*/
1887 int log_transid_committed;
1888 /* Just be updated when the commit succeeds. */
Miao Xiebb14a592014-02-20 18:08:56 +08001889 int last_log_commit;
Josef Bacikff782e02009-10-08 15:30:04 -04001890 pid_t log_start_pid;
Chris Masonea8c2812008-08-04 23:17:27 -04001891
Chris Mason0f7d52f2007-04-09 10:42:37 -04001892 u64 objectid;
1893 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001894
1895 /* data allocations are done in sectorsize units */
1896 u32 sectorsize;
1897
1898 /* node allocations are done in nodesize units */
1899 u32 nodesize;
1900
Chris Mason87ee04e2007-11-30 11:30:34 -05001901 u32 stripesize;
1902
Chris Mason9f5fae22007-03-20 14:38:32 -04001903 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001904
1905 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001906
Chris Mason0d4cf4e2014-10-07 13:24:20 -07001907 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001908 u64 alloc_bytenr;
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001909
Chris Mason3f157a22008-06-25 16:01:31 -04001910 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001911 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001912 struct btrfs_key defrag_max;
Josef Bacik58176a92007-08-29 15:47:34 -04001913 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001914
1915 /* the dirty list is only used by non-reference counted roots */
1916 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001917
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001918 struct list_head root_list;
1919
Josef Bacik2ab28f32012-10-12 15:27:49 -04001920 spinlock_t log_extents_lock[2];
1921 struct list_head logged_list[2];
1922
Yan, Zhengd68fc572010-05-16 10:49:58 -04001923 spinlock_t orphan_lock;
Josef Bacik8a35d952012-05-23 14:26:42 -04001924 atomic_t orphan_inodes;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001925 struct btrfs_block_rsv *orphan_block_rsv;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001926 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001927
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001928 spinlock_t inode_lock;
1929 /* red-black tree that keeps track of in-memory inodes */
1930 struct rb_root inode_tree;
1931
Chris Mason3394e162008-11-17 20:42:26 -05001932 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001933 * radix tree that keeps track of delayed nodes of every inode,
1934 * protected by inode_lock
1935 */
1936 struct radix_tree_root delayed_nodes_tree;
1937 /*
Chris Mason3394e162008-11-17 20:42:26 -05001938 * right now this just gets used so that a root has its own devid
1939 * for stat. It may be used for more later
1940 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001941 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001942
Anand Jain5f3ab902012-12-07 09:28:54 +00001943 spinlock_t root_item_lock;
Miao Xieb0feb9d2013-05-15 07:48:20 +00001944 atomic_t refs;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001945
Miao Xie573bfb72014-03-06 13:55:03 +08001946 struct mutex delalloc_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001947 spinlock_t delalloc_lock;
1948 /*
1949 * all of the inodes that have delalloc bytes. It is possible for
1950 * this list to be empty even when there is still dirty data=ordered
1951 * extents waiting to finish IO.
1952 */
1953 struct list_head delalloc_inodes;
1954 struct list_head delalloc_root;
1955 u64 nr_delalloc_inodes;
Miao Xie31f3d252014-03-06 13:55:02 +08001956
1957 struct mutex ordered_extent_mutex;
Miao Xie199c2a92013-05-15 07:48:23 +00001958 /*
1959 * this is used by the balancing code to wait for all the pending
1960 * ordered extents
1961 */
1962 spinlock_t ordered_extent_lock;
1963
1964 /*
1965 * all of the data=ordered extents pending writeback
1966 * these can span multiple transactions and basically include
1967 * every dirty data page that isn't from nodatacow
1968 */
1969 struct list_head ordered_extents;
1970 struct list_head ordered_root;
1971 u64 nr_ordered_extents;
David Sterba2c686532013-12-16 17:34:17 +01001972
1973 /*
1974 * Number of currently running SEND ioctls to prevent
1975 * manipulation with the read-only status via SUBVOL_SETFLAGS
1976 */
1977 int send_in_progress;
Miao Xie8257b2d2014-03-06 13:38:19 +08001978 struct btrfs_subvolume_writers *subv_writers;
1979 atomic_t will_be_snapshoted;
Qu Wenruo55eeaf02015-09-08 17:08:38 +08001980
1981 /* For qgroup metadata space reserve */
1982 atomic_t qgroup_meta_rsv;
Chris Mason62e27492007-03-15 12:56:47 -04001983};
1984
Chris Mason4cb53002011-05-24 15:35:30 -04001985struct btrfs_ioctl_defrag_range_args {
1986 /* start of the defrag operation */
1987 __u64 start;
1988
1989 /* number of bytes to defrag, use (u64)-1 to say all */
1990 __u64 len;
1991
1992 /*
1993 * flags for the operation, which can include turning
1994 * on compression for this one defrag
1995 */
1996 __u64 flags;
1997
1998 /*
1999 * any extent bigger than this will be considered
2000 * already defragged. Use 0 to take the kernel default
2001 * Use 1 to say every single extent must be rewritten
2002 */
2003 __u32 extent_thresh;
2004
2005 /*
2006 * which compression method to use if turning on compression
2007 * for this defrag operation. If unspecified, zlib will
2008 * be used
2009 */
2010 __u32 compress_type;
2011
2012 /* spare for later */
2013 __u32 unused[4];
2014};
2015
2016
Chris Mason1e1d2702007-03-15 19:03:33 -04002017/*
2018 * inode items have the data typically returned from stat and store other
2019 * info about object characteristics. There is one for every file and dir in
2020 * the FS
2021 */
Chris Mason9078a3e2007-04-26 16:46:15 -04002022#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05002023#define BTRFS_INODE_REF_KEY 12
Mark Fashehf1863732012-08-08 11:32:27 -07002024#define BTRFS_INODE_EXTREF_KEY 13
Chris Mason0660b5a2008-11-17 20:37:39 -05002025#define BTRFS_XATTR_ITEM_KEY 24
2026#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04002027/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04002028
2029/*
2030 * dir items are the name -> inode pointers in a directory. There is one
2031 * for every name in a directory.
2032 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002033#define BTRFS_DIR_LOG_ITEM_KEY 60
2034#define BTRFS_DIR_LOG_INDEX_KEY 72
2035#define BTRFS_DIR_ITEM_KEY 84
2036#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04002037/*
Chris Mason9078a3e2007-04-26 16:46:15 -04002038 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04002039 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002040#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05002041
Chris Mason1e1d2702007-03-15 19:03:33 -04002042/*
Chris Masond20f7042008-12-08 16:58:54 -05002043 * extent csums are stored in a separate tree and hold csums for
2044 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04002045 */
Chris Masond20f7042008-12-08 16:58:54 -05002046#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04002047
2048/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04002049 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04002050 * tree used by the super block to find all the other trees
2051 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002052#define BTRFS_ROOT_ITEM_KEY 132
2053
2054/*
2055 * root backrefs tie subvols and snapshots to the directory entries that
2056 * reference them
2057 */
2058#define BTRFS_ROOT_BACKREF_KEY 144
2059
2060/*
2061 * root refs make a fast index for listing all of the snapshots and
2062 * subvolumes referenced by a given root. They point directly to the
2063 * directory item in the root that references the subvol
2064 */
2065#define BTRFS_ROOT_REF_KEY 156
2066
Chris Mason1e1d2702007-03-15 19:03:33 -04002067/*
2068 * extent items are in the extent map tree. These record which blocks
2069 * are used, and how many references there are to each block
2070 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002071#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002072
Josef Bacik3173a182013-03-07 14:22:04 -05002073/*
2074 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2075 * the length, so we save the level in key->offset instead of the length.
2076 */
2077#define BTRFS_METADATA_ITEM_KEY 169
2078
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002079#define BTRFS_TREE_BLOCK_REF_KEY 176
2080
2081#define BTRFS_EXTENT_DATA_REF_KEY 178
2082
2083#define BTRFS_EXTENT_REF_V0_KEY 180
2084
2085#define BTRFS_SHARED_BLOCK_REF_KEY 182
2086
2087#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04002088
2089/*
2090 * block groups give us hints into the extent allocation trees. Which
2091 * blocks are free etc etc
2092 */
Chris Mason0660b5a2008-11-17 20:37:39 -05002093#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04002094
Chris Mason0660b5a2008-11-17 20:37:39 -05002095#define BTRFS_DEV_EXTENT_KEY 204
2096#define BTRFS_DEV_ITEM_KEY 216
2097#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04002098
Arne Jansen630dc772011-09-13 11:06:07 +02002099/*
2100 * Records the overall state of the qgroups.
2101 * There's only one instance of this key present,
2102 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2103 */
2104#define BTRFS_QGROUP_STATUS_KEY 240
2105/*
2106 * Records the currently used space of the qgroup.
2107 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2108 */
2109#define BTRFS_QGROUP_INFO_KEY 242
2110/*
2111 * Contains the user configured limits for the qgroup.
2112 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2113 */
2114#define BTRFS_QGROUP_LIMIT_KEY 244
2115/*
2116 * Records the child-parent relationship of qgroups. For
2117 * each relation, 2 keys are present:
2118 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2119 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2120 */
2121#define BTRFS_QGROUP_RELATION_KEY 246
2122
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002123#define BTRFS_BALANCE_ITEM_KEY 248
2124
Chris Mason9f5fae22007-03-20 14:38:32 -04002125/*
Stefan Behrens733f4fb2012-05-25 16:06:10 +02002126 * Persistantly stores the io stats in the device tree.
2127 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2128 */
2129#define BTRFS_DEV_STATS_KEY 249
2130
2131/*
Stefan Behrensa2bff642012-11-05 17:32:20 +01002132 * Persistantly stores the device replace state in the device tree.
2133 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2134 */
2135#define BTRFS_DEV_REPLACE_KEY 250
2136
2137/*
Stefan Behrens07b30a42013-08-15 17:11:17 +02002138 * Stores items that allow to quickly map UUIDs to something else.
2139 * These items are part of the filesystem UUID tree.
2140 * The key is built like this:
2141 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2142 */
2143#if BTRFS_UUID_SIZE != 16
2144#error "UUID items require BTRFS_UUID_SIZE == 16!"
2145#endif
2146#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2147#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2148 * received subvols */
2149
2150/*
Chris Mason1e1d2702007-03-15 19:03:33 -04002151 * string items are for debugging. They just store a short string of
2152 * data in the FS
2153 */
Chris Mason9078a3e2007-04-26 16:46:15 -04002154#define BTRFS_STRING_ITEM_KEY 253
2155
David Sterba0942caa2011-06-28 15:10:37 +00002156/*
2157 * Flags for mount options.
2158 *
2159 * Note: don't forget to add new options to btrfs_show_options()
2160 */
Chris Mason21ad10c2008-01-09 09:23:21 -05002161#define BTRFS_MOUNT_NODATASUM (1 << 0)
2162#define BTRFS_MOUNT_NODATACOW (1 << 1)
2163#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05002164#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04002165#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04002166#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04002167#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04002168#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04002169#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04002170#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04002171#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05002172#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04002173#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04002174#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04002175#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05002176#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04002177#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04002178#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Chris Masonaf31f5e2011-11-03 15:17:42 -04002179#define BTRFS_MOUNT_RECOVERY (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02002180#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05002181#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2182#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04002183#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Stefan Behrensf420ee12013-08-15 17:11:24 +02002184#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
Josef Bacikd0bd4562015-09-23 14:54:14 -04002185#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
2186#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002187
David Sterba8b87dc12013-08-01 18:14:52 +02002188#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
Filipe David Borba Manana95ac5672013-08-08 22:45:48 +01002189#define BTRFS_DEFAULT_MAX_INLINE (8192)
David Sterba8b87dc12013-08-01 18:14:52 +02002190
Chris Masonb6cda9b2007-12-14 15:30:32 -05002191#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2192#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
Miao Xiedc81cdc2013-02-20 23:32:52 -07002193#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
Chris Masonb6cda9b2007-12-14 15:30:32 -05002194#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2195 BTRFS_MOUNT_##opt)
David Sterba572d9ab2014-02-05 15:26:17 +01002196
Wang Shilong9d89ce62014-04-23 19:33:33 +08002197#define btrfs_set_and_info(root, opt, fmt, args...) \
2198{ \
2199 if (!btrfs_test_opt(root, opt)) \
2200 btrfs_info(root->fs_info, fmt, ##args); \
2201 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2202}
2203
2204#define btrfs_clear_and_info(root, opt, fmt, args...) \
2205{ \
2206 if (btrfs_test_opt(root, opt)) \
2207 btrfs_info(root->fs_info, fmt, ##args); \
2208 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2209}
2210
Josef Bacikd0bd4562015-09-23 14:54:14 -04002211#ifdef CONFIG_BTRFS_DEBUG
2212static inline int
2213btrfs_should_fragment_free_space(struct btrfs_root *root,
2214 struct btrfs_block_group_cache *block_group)
2215{
2216 return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
2217 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
2218 (btrfs_test_opt(root, FRAGMENT_DATA) &&
2219 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
2220}
2221#endif
2222
Yanb98b6762008-01-08 15:54:37 -05002223/*
David Sterba572d9ab2014-02-05 15:26:17 +01002224 * Requests for changes that need to be done during transaction commit.
2225 *
2226 * Internal mount options that are used for special handling of the real
2227 * mount options (eg. cannot be set during remount and have to be set during
2228 * transaction commit)
2229 */
2230
David Sterba7e1876a2014-02-05 15:26:17 +01002231#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2232#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
David Sterbad51033d2014-11-12 14:24:35 +01002233#define BTRFS_PENDING_COMMIT (2)
David Sterba7e1876a2014-02-05 15:26:17 +01002234
David Sterba572d9ab2014-02-05 15:26:17 +01002235#define btrfs_test_pending(info, opt) \
2236 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2237#define btrfs_set_pending(info, opt) \
2238 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2239#define btrfs_clear_pending(info, opt) \
2240 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2241
2242/*
2243 * Helpers for setting pending mount option changes.
2244 *
2245 * Expects corresponding macros
2246 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2247 */
2248#define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2249do { \
2250 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2251 btrfs_info((info), fmt, ##args); \
2252 btrfs_set_pending((info), SET_##opt); \
2253 btrfs_clear_pending((info), CLEAR_##opt); \
2254 } \
2255} while(0)
2256
2257#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2258do { \
2259 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2260 btrfs_info((info), fmt, ##args); \
2261 btrfs_set_pending((info), CLEAR_##opt); \
2262 btrfs_clear_pending((info), SET_##opt); \
2263 } \
2264} while(0)
2265
2266/*
Yanb98b6762008-01-08 15:54:37 -05002267 * Inode flags
2268 */
Yanfdebe2b2008-01-14 13:26:08 -05002269#define BTRFS_INODE_NODATASUM (1 << 0)
2270#define BTRFS_INODE_NODATACOW (1 << 1)
2271#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04002272#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04002273#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002274#define BTRFS_INODE_SYNC (1 << 5)
2275#define BTRFS_INODE_IMMUTABLE (1 << 6)
2276#define BTRFS_INODE_APPEND (1 << 7)
2277#define BTRFS_INODE_NODUMP (1 << 8)
2278#define BTRFS_INODE_NOATIME (1 << 9)
2279#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00002280#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002281
Li Zefan08fe4db2011-03-28 02:01:25 +00002282#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2283
Chris Masoncfed81a2012-03-03 07:40:03 -05002284struct btrfs_map_token {
2285 struct extent_buffer *eb;
2286 char *kaddr;
2287 unsigned long offset;
2288};
2289
2290static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2291{
Josef Bacikad914552012-10-15 13:39:33 -04002292 token->kaddr = NULL;
Chris Masoncfed81a2012-03-03 07:40:03 -05002293}
2294
Chris Mason5f39d392007-10-15 16:14:19 -04002295/* some macros to generate set/get funcs for the struct fields. This
2296 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2297 * one for u8:
2298 */
2299#define le8_to_cpu(v) (v)
2300#define cpu_to_le8(v) (v)
2301#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04002302
Chris Mason5f39d392007-10-15 16:14:19 -04002303#define read_eb_member(eb, ptr, type, member, result) ( \
2304 read_extent_buffer(eb, (char *)(result), \
2305 ((unsigned long)(ptr)) + \
2306 offsetof(type, member), \
2307 sizeof(((type *)0)->member)))
2308
2309#define write_eb_member(eb, ptr, type, member, result) ( \
2310 write_extent_buffer(eb, (char *)(result), \
2311 ((unsigned long)(ptr)) + \
2312 offsetof(type, member), \
2313 sizeof(((type *)0)->member)))
2314
Li Zefan18077bb2012-07-09 20:22:35 -06002315#define DECLARE_BTRFS_SETGET_BITS(bits) \
2316u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2317 unsigned long off, \
2318 struct btrfs_map_token *token); \
2319void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2320 unsigned long off, u##bits val, \
2321 struct btrfs_map_token *token); \
2322static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2323 unsigned long off) \
2324{ \
2325 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2326} \
2327static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2328 unsigned long off, u##bits val) \
2329{ \
2330 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2331}
2332
2333DECLARE_BTRFS_SETGET_BITS(8)
2334DECLARE_BTRFS_SETGET_BITS(16)
2335DECLARE_BTRFS_SETGET_BITS(32)
2336DECLARE_BTRFS_SETGET_BITS(64)
2337
Chris Mason5f39d392007-10-15 16:14:19 -04002338#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Li Zefan18077bb2012-07-09 20:22:35 -06002339static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2340{ \
2341 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2342 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2343} \
2344static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2345 u##bits val) \
2346{ \
2347 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2348 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2349} \
2350static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2351 struct btrfs_map_token *token) \
2352{ \
2353 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2354 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2355} \
2356static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2357 type *s, u##bits val, \
2358 struct btrfs_map_token *token) \
2359{ \
2360 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2361 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2362}
Chris Mason9078a3e2007-04-26 16:46:15 -04002363
Chris Mason5f39d392007-10-15 16:14:19 -04002364#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2365static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2366{ \
Chris Mason727011e2010-08-06 13:21:20 -04002367 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002368 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04002369 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04002370} \
2371static inline void btrfs_set_##name(struct extent_buffer *eb, \
2372 u##bits val) \
2373{ \
Chris Mason727011e2010-08-06 13:21:20 -04002374 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05002375 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04002376}
Chris Mason1e1d2702007-03-15 19:03:33 -04002377
Chris Mason5f39d392007-10-15 16:14:19 -04002378#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2379static inline u##bits btrfs_##name(type *s) \
2380{ \
2381 return le##bits##_to_cpu(s->member); \
2382} \
2383static inline void btrfs_set_##name(type *s, u##bits val) \
2384{ \
2385 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04002386}
2387
Chris Mason0b86a832008-03-24 15:01:56 -04002388BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2389BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2390BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2391BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2392BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05002393BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2394 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002395BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2396BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002397BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2398BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2399BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002400BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002401
Chris Mason8a4b83c2008-03-24 15:02:07 -04002402BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2403BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2404 total_bytes, 64);
2405BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2406 bytes_used, 64);
2407BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2408 io_align, 32);
2409BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2410 io_width, 32);
2411BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2412 sector_size, 32);
2413BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002414BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2415 dev_group, 32);
2416BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2417 seek_speed, 8);
2418BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2419 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05002420BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2421 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002422
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002423static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
Chris Mason0b86a832008-03-24 15:01:56 -04002424{
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02002425 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
Chris Mason0b86a832008-03-24 15:01:56 -04002426}
2427
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002428static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
Yan Zheng2b820322008-11-17 21:11:30 -05002429{
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02002430 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
Yan Zheng2b820322008-11-17 21:11:30 -05002431}
2432
Chris Masone17cade2008-04-15 15:41:47 -04002433BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002434BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2435BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2436BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2437BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2438BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2439BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2440BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002441BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002442BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2443BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2444
Chris Masone17cade2008-04-15 15:41:47 -04002445static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2446{
2447 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2448}
2449
2450BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002451BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2452BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2453 stripe_len, 64);
2454BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2455 io_align, 32);
2456BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2457 io_width, 32);
2458BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2459 sector_size, 32);
2460BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2461BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2462 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04002463BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2464 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04002465BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2466BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2467
2468static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2469 int nr)
2470{
2471 unsigned long offset = (unsigned long)c;
2472 offset += offsetof(struct btrfs_chunk, stripe);
2473 offset += nr * sizeof(struct btrfs_stripe);
2474 return (struct btrfs_stripe *)offset;
2475}
2476
Chris Masona4437552008-04-18 10:29:38 -04002477static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2478{
2479 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2480}
2481
Chris Mason0b86a832008-03-24 15:01:56 -04002482static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2483 struct btrfs_chunk *c, int nr)
2484{
2485 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2486}
2487
Chris Mason0b86a832008-03-24 15:01:56 -04002488static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2489 struct btrfs_chunk *c, int nr)
2490{
2491 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2492}
2493
Chris Mason5f39d392007-10-15 16:14:19 -04002494/* struct btrfs_block_group_item */
2495BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2496 used, 64);
2497BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2498 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002499BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2500 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04002501
2502BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04002503 struct btrfs_block_group_item, chunk_objectid, 64);
2504BTRFS_SETGET_FUNCS(disk_block_group_flags,
2505 struct btrfs_block_group_item, flags, 64);
2506BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2507 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002508
Chris Mason39544012007-12-12 14:38:19 -05002509/* struct btrfs_inode_ref */
2510BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04002511BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05002512
Mark Fashehf1863732012-08-08 11:32:27 -07002513/* struct btrfs_inode_extref */
2514BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2515 parent_objectid, 64);
2516BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2517 name_len, 16);
2518BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2519
Chris Mason5f39d392007-10-15 16:14:19 -04002520/* struct btrfs_inode_item */
2521BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002522BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002523BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002524BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04002525BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002526BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2527BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2528BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2529BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2530BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04002531BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002532BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002533BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2534 generation, 64);
2535BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2536 sequence, 64);
2537BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2538 transid, 64);
2539BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2540BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2541 nbytes, 64);
2542BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2543 block_group, 64);
2544BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2545BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2546BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2547BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2548BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2549BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002550BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2551BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002552BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2553BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002554
Chris Mason0b86a832008-03-24 15:01:56 -04002555/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04002556BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2557 chunk_tree, 64);
2558BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2559 chunk_objectid, 64);
2560BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2561 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002562BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2563
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002564static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
Chris Masone17cade2008-04-15 15:41:47 -04002565{
2566 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02002567 return (unsigned long)dev + ptr;
Chris Masone17cade2008-04-15 15:41:47 -04002568}
2569
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002570BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2571BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2572 generation, 64);
2573BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002574
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002575BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002576
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002577
2578BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2579
2580static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2581 struct btrfs_tree_block_info *item,
2582 struct btrfs_disk_key *key)
2583{
2584 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2585}
2586
2587static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2588 struct btrfs_tree_block_info *item,
2589 struct btrfs_disk_key *key)
2590{
2591 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2592}
2593
2594BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2595 root, 64);
2596BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2597 objectid, 64);
2598BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2599 offset, 64);
2600BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2601 count, 32);
2602
2603BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2604 count, 32);
2605
2606BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2607 type, 8);
2608BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2609 offset, 64);
2610
2611static inline u32 btrfs_extent_inline_ref_size(int type)
2612{
2613 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2614 type == BTRFS_SHARED_BLOCK_REF_KEY)
2615 return sizeof(struct btrfs_extent_inline_ref);
2616 if (type == BTRFS_SHARED_DATA_REF_KEY)
2617 return sizeof(struct btrfs_shared_data_ref) +
2618 sizeof(struct btrfs_extent_inline_ref);
2619 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2620 return sizeof(struct btrfs_extent_data_ref) +
2621 offsetof(struct btrfs_extent_inline_ref, offset);
2622 BUG();
2623 return 0;
2624}
2625
2626BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2627BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2628 generation, 64);
2629BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2630BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002631
2632/* struct btrfs_node */
2633BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05002634BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002635BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2636 blockptr, 64);
2637BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2638 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002639
2640static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002641{
Chris Mason5f39d392007-10-15 16:14:19 -04002642 unsigned long ptr;
2643 ptr = offsetof(struct btrfs_node, ptrs) +
2644 sizeof(struct btrfs_key_ptr) * nr;
2645 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002646}
2647
Chris Mason5f39d392007-10-15 16:14:19 -04002648static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2649 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04002650{
Chris Mason5f39d392007-10-15 16:14:19 -04002651 unsigned long ptr;
2652 ptr = offsetof(struct btrfs_node, ptrs) +
2653 sizeof(struct btrfs_key_ptr) * nr;
2654 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04002655}
2656
Chris Mason74493f72007-12-11 09:25:06 -05002657static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2658{
2659 unsigned long ptr;
2660 ptr = offsetof(struct btrfs_node, ptrs) +
2661 sizeof(struct btrfs_key_ptr) * nr;
2662 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2663}
2664
2665static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2666 int nr, u64 val)
2667{
2668 unsigned long ptr;
2669 ptr = offsetof(struct btrfs_node, ptrs) +
2670 sizeof(struct btrfs_key_ptr) * nr;
2671 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2672}
2673
Chris Mason810191f2007-10-15 16:18:55 -04002674static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04002675{
Chris Mason5f39d392007-10-15 16:14:19 -04002676 return offsetof(struct btrfs_node, ptrs) +
2677 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04002678}
2679
Chris Masone644d022007-11-06 15:09:29 -05002680void btrfs_node_key(struct extent_buffer *eb,
2681 struct btrfs_disk_key *disk_key, int nr);
2682
Chris Mason5f39d392007-10-15 16:14:19 -04002683static inline void btrfs_set_node_key(struct extent_buffer *eb,
2684 struct btrfs_disk_key *disk_key, int nr)
2685{
2686 unsigned long ptr;
2687 ptr = btrfs_node_key_ptr_offset(nr);
2688 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2689 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002690}
2691
Chris Mason5f39d392007-10-15 16:14:19 -04002692/* struct btrfs_item */
2693BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2694BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002695BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2696BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002697
2698static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002699{
Chris Mason5f39d392007-10-15 16:14:19 -04002700 return offsetof(struct btrfs_leaf, items) +
2701 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04002702}
2703
Ross Kirkdd3cc162013-09-16 15:58:09 +01002704static inline struct btrfs_item *btrfs_item_nr(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002705{
Chris Mason5f39d392007-10-15 16:14:19 -04002706 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04002707}
2708
Chris Mason5f39d392007-10-15 16:14:19 -04002709static inline u32 btrfs_item_end(struct extent_buffer *eb,
2710 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04002711{
Chris Mason5f39d392007-10-15 16:14:19 -04002712 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04002713}
2714
Chris Mason5f39d392007-10-15 16:14:19 -04002715static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002716{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002717 return btrfs_item_end(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002718}
2719
Chris Mason5f39d392007-10-15 16:14:19 -04002720static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002721{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002722 return btrfs_item_offset(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002723}
2724
Chris Mason5f39d392007-10-15 16:14:19 -04002725static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002726{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002727 return btrfs_item_size(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04002728}
2729
Chris Mason5f39d392007-10-15 16:14:19 -04002730static inline void btrfs_item_key(struct extent_buffer *eb,
2731 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002732{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002733 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002734 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002735}
2736
Chris Mason5f39d392007-10-15 16:14:19 -04002737static inline void btrfs_set_item_key(struct extent_buffer *eb,
2738 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04002739{
Ross Kirkdd3cc162013-09-16 15:58:09 +01002740 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04002741 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002742}
2743
Chris Masone02119d2008-09-05 16:13:11 -04002744BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2745
Chris Mason0660b5a2008-11-17 20:37:39 -05002746/*
2747 * struct btrfs_root_ref
2748 */
2749BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2750BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2751BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2752
Chris Mason5f39d392007-10-15 16:14:19 -04002753/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05002754BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04002755BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2756BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04002757BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002758BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2759BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2760 data_len, 16);
2761BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2762 name_len, 16);
2763BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2764 transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002765
2766static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2767 struct btrfs_dir_item *item,
2768 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002769{
Chris Mason5f39d392007-10-15 16:14:19 -04002770 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002771}
2772
Chris Mason5f39d392007-10-15 16:14:19 -04002773static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2774 struct btrfs_dir_item *item,
2775 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002776{
Chris Mason5f39d392007-10-15 16:14:19 -04002777 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002778}
2779
Josef Bacik0af3d002010-06-21 14:48:16 -04002780BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2781 num_entries, 64);
2782BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2783 num_bitmaps, 64);
2784BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2785 generation, 64);
2786
2787static inline void btrfs_free_space_key(struct extent_buffer *eb,
2788 struct btrfs_free_space_header *h,
2789 struct btrfs_disk_key *key)
2790{
2791 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2792}
2793
2794static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2795 struct btrfs_free_space_header *h,
2796 struct btrfs_disk_key *key)
2797{
2798 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2799}
2800
Chris Mason5f39d392007-10-15 16:14:19 -04002801/* struct btrfs_disk_key */
2802BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2803 objectid, 64);
2804BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2805BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04002806
Chris Masone2fa7222007-03-12 16:22:34 -04002807static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2808 struct btrfs_disk_key *disk)
2809{
2810 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002811 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002812 cpu->objectid = le64_to_cpu(disk->objectid);
2813}
2814
2815static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2816 struct btrfs_key *cpu)
2817{
2818 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002819 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002820 disk->objectid = cpu_to_le64(cpu->objectid);
2821}
2822
Chris Mason5f39d392007-10-15 16:14:19 -04002823static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2824 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002825{
Chris Mason5f39d392007-10-15 16:14:19 -04002826 struct btrfs_disk_key disk_key;
2827 btrfs_node_key(eb, &disk_key, nr);
2828 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002829}
2830
Chris Mason5f39d392007-10-15 16:14:19 -04002831static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2832 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002833{
Chris Mason5f39d392007-10-15 16:14:19 -04002834 struct btrfs_disk_key disk_key;
2835 btrfs_item_key(eb, &disk_key, nr);
2836 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002837}
2838
Chris Mason5f39d392007-10-15 16:14:19 -04002839static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2840 struct btrfs_dir_item *item,
2841 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002842{
Chris Mason5f39d392007-10-15 16:14:19 -04002843 struct btrfs_disk_key disk_key;
2844 btrfs_dir_item_key(eb, item, &disk_key);
2845 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002846}
2847
Chris Mason5f39d392007-10-15 16:14:19 -04002848
2849static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002850{
Chris Mason5f39d392007-10-15 16:14:19 -04002851 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002852}
2853
Chris Mason5f39d392007-10-15 16:14:19 -04002854static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002855{
Chris Mason5f39d392007-10-15 16:14:19 -04002856 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002857}
2858
Chris Mason5f39d392007-10-15 16:14:19 -04002859/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002860BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002861BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2862 generation, 64);
2863BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2864BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002865BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002866BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002867BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2868 generation, 64);
2869BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2870BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2871 nritems, 32);
2872BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002873
Chris Mason63b10fc2008-04-01 11:21:32 -04002874static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2875{
2876 return (btrfs_header_flags(eb) & flag) == flag;
2877}
2878
2879static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2880{
2881 u64 flags = btrfs_header_flags(eb);
2882 btrfs_set_header_flags(eb, flags | flag);
2883 return (flags & flag) == flag;
2884}
2885
2886static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2887{
2888 u64 flags = btrfs_header_flags(eb);
2889 btrfs_set_header_flags(eb, flags & ~flag);
2890 return (flags & flag) == flag;
2891}
2892
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002893static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2894{
2895 u64 flags = btrfs_header_flags(eb);
2896 return flags >> BTRFS_BACKREF_REV_SHIFT;
2897}
2898
2899static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2900 int rev)
2901{
2902 u64 flags = btrfs_header_flags(eb);
2903 flags &= ~BTRFS_BACKREF_REV_MASK;
2904 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2905 btrfs_set_header_flags(eb, flags);
2906}
2907
Ross Kirk0a4e5582013-09-24 10:12:38 +01002908static inline unsigned long btrfs_header_fsid(void)
Chris Masone2fa7222007-03-12 16:22:34 -04002909{
Geert Uytterhoevenfba6aa72013-08-20 13:20:14 +02002910 return offsetof(struct btrfs_header, fsid);
Chris Masone2fa7222007-03-12 16:22:34 -04002911}
2912
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002913static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
Chris Masone17cade2008-04-15 15:41:47 -04002914{
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002915 return offsetof(struct btrfs_header, chunk_tree_uuid);
Chris Masone17cade2008-04-15 15:41:47 -04002916}
2917
Chris Mason5f39d392007-10-15 16:14:19 -04002918static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002919{
Chris Masond3977122009-01-05 21:25:51 -05002920 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002921}
2922
Chris Mason5f39d392007-10-15 16:14:19 -04002923/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002924BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2925 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002926BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002927BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2928BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002929
Yan Zheng84234f32008-10-29 14:49:05 -04002930BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2931 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002932BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2933BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002934BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2935BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002936BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002937BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2938BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002939BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2940 last_snapshot, 64);
Alexander Block8ea05e32012-07-25 17:35:53 +02002941BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2942 generation_v2, 64);
2943BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2944 ctransid, 64);
2945BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2946 otransid, 64);
2947BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2948 stransid, 64);
2949BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2950 rtransid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002951
Li Zefanb83cc962010-12-20 16:04:08 +08002952static inline bool btrfs_root_readonly(struct btrfs_root *root)
2953{
Al Viro6ed3cf22012-04-13 11:49:04 -04002954 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002955}
2956
David Sterba521e0542014-04-15 16:41:44 +02002957static inline bool btrfs_root_dead(struct btrfs_root *root)
2958{
2959 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2960}
2961
Chris Masonaf31f5e2011-11-03 15:17:42 -04002962/* struct btrfs_root_backup */
2963BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2964 tree_root, 64);
2965BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2966 tree_root_gen, 64);
2967BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2968 tree_root_level, 8);
2969
2970BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2971 chunk_root, 64);
2972BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2973 chunk_root_gen, 64);
2974BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2975 chunk_root_level, 8);
2976
2977BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2978 extent_root, 64);
2979BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2980 extent_root_gen, 64);
2981BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2982 extent_root_level, 8);
2983
2984BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2985 fs_root, 64);
2986BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2987 fs_root_gen, 64);
2988BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2989 fs_root_level, 8);
2990
2991BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2992 dev_root, 64);
2993BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2994 dev_root_gen, 64);
2995BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2996 dev_root_level, 8);
2997
2998BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2999 csum_root, 64);
3000BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
3001 csum_root_gen, 64);
3002BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
3003 csum_root_level, 8);
3004BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
3005 total_bytes, 64);
3006BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
3007 bytes_used, 64);
3008BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
3009 num_devices, 64);
3010
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003011/* struct btrfs_balance_item */
3012BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05003013
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003014static inline void btrfs_balance_data(struct extent_buffer *eb,
3015 struct btrfs_balance_item *bi,
3016 struct btrfs_disk_balance_args *ba)
3017{
3018 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3019}
3020
3021static inline void btrfs_set_balance_data(struct extent_buffer *eb,
3022 struct btrfs_balance_item *bi,
3023 struct btrfs_disk_balance_args *ba)
3024{
3025 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3026}
3027
3028static inline void btrfs_balance_meta(struct extent_buffer *eb,
3029 struct btrfs_balance_item *bi,
3030 struct btrfs_disk_balance_args *ba)
3031{
3032 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3033}
3034
3035static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
3036 struct btrfs_balance_item *bi,
3037 struct btrfs_disk_balance_args *ba)
3038{
3039 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3040}
3041
3042static inline void btrfs_balance_sys(struct extent_buffer *eb,
3043 struct btrfs_balance_item *bi,
3044 struct btrfs_disk_balance_args *ba)
3045{
3046 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3047}
3048
3049static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3050 struct btrfs_balance_item *bi,
3051 struct btrfs_disk_balance_args *ba)
3052{
3053 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3054}
3055
3056static inline void
3057btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3058 struct btrfs_disk_balance_args *disk)
3059{
3060 memset(cpu, 0, sizeof(*cpu));
3061
3062 cpu->profiles = le64_to_cpu(disk->profiles);
3063 cpu->usage = le64_to_cpu(disk->usage);
3064 cpu->devid = le64_to_cpu(disk->devid);
3065 cpu->pstart = le64_to_cpu(disk->pstart);
3066 cpu->pend = le64_to_cpu(disk->pend);
3067 cpu->vstart = le64_to_cpu(disk->vstart);
3068 cpu->vend = le64_to_cpu(disk->vend);
3069 cpu->target = le64_to_cpu(disk->target);
3070 cpu->flags = le64_to_cpu(disk->flags);
David Sterba7d824b62014-05-07 17:37:51 +02003071 cpu->limit = le64_to_cpu(disk->limit);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003072}
3073
3074static inline void
3075btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3076 struct btrfs_balance_args *cpu)
3077{
3078 memset(disk, 0, sizeof(*disk));
3079
3080 disk->profiles = cpu_to_le64(cpu->profiles);
3081 disk->usage = cpu_to_le64(cpu->usage);
3082 disk->devid = cpu_to_le64(cpu->devid);
3083 disk->pstart = cpu_to_le64(cpu->pstart);
3084 disk->pend = cpu_to_le64(cpu->pend);
3085 disk->vstart = cpu_to_le64(cpu->vstart);
3086 disk->vend = cpu_to_le64(cpu->vend);
3087 disk->target = cpu_to_le64(cpu->target);
3088 disk->flags = cpu_to_le64(cpu->flags);
David Sterba7d824b62014-05-07 17:37:51 +02003089 disk->limit = cpu_to_le64(cpu->limit);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02003090}
3091
3092/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04003093BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04003094BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003095BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3096 generation, 64);
3097BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04003098BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3099 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04003100BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3101 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04003102BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3103 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04003104BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3105 chunk_root, 64);
3106BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04003107 chunk_root_level, 8);
3108BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3109 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05003110BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3111 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04003112BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3113 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04003114BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3115 total_bytes, 64);
3116BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3117 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003118BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3119 sectorsize, 32);
3120BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3121 nodesize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05003122BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3123 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04003124BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3125 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04003126BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3127 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05003128BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3129 compat_flags, 64);
3130BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00003131 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05003132BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3133 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05003134BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3135 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04003136BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3137 cache_generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08003138BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
Stefan Behrens26432792013-08-15 17:11:22 +02003139BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3140 uuid_tree_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05003141
3142static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3143{
David Sterba1104a882013-03-06 15:57:46 +01003144 u16 t = btrfs_super_csum_type(s);
3145 /*
3146 * csum type is validated at mount time
3147 */
Josef Bacik607d4322008-12-02 07:17:45 -05003148 return btrfs_csum_sizes[t];
3149}
Chris Mason5f39d392007-10-15 16:14:19 -04003150
3151static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04003152{
Chris Mason5f39d392007-10-15 16:14:19 -04003153 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04003154}
3155
Chris Mason5f39d392007-10-15 16:14:19 -04003156/* struct btrfs_file_extent_item */
3157BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08003158BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3159 struct btrfs_file_extent_item, disk_bytenr, 64);
3160BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3161 struct btrfs_file_extent_item, offset, 64);
3162BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3163 struct btrfs_file_extent_item, generation, 64);
3164BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3165 struct btrfs_file_extent_item, num_bytes, 64);
Josef Bacike20d6c52013-11-13 21:11:49 -05003166BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3167 struct btrfs_file_extent_item, disk_num_bytes, 64);
3168BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3169 struct btrfs_file_extent_item, compression, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04003170
Chris Masond3977122009-01-05 21:25:51 -05003171static inline unsigned long
3172btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454df2007-04-19 13:37:44 -04003173{
David Sterba7ec20af2014-07-24 17:34:58 +02003174 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Mason236454df2007-04-19 13:37:44 -04003175}
3176
3177static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3178{
David Sterba7ec20af2014-07-24 17:34:58 +02003179 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
Chris Mason236454df2007-04-19 13:37:44 -04003180}
3181
Chris Masondb945352007-10-15 16:15:53 -04003182BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3183 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003184BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3185 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04003186BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3187 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04003188BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3189 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04003190BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3191 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04003192BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3193 ram_bytes, 64);
3194BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3195 compression, 8);
3196BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3197 encryption, 8);
3198BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3199 other_encoding, 16);
3200
Chris Masonc8b97812008-10-29 14:49:59 -04003201/*
3202 * this returns the number of bytes used by the item on disk, minus the
3203 * size of any extent headers. If a file is compressed on disk, this is
3204 * the compressed size
3205 */
3206static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3207 struct btrfs_item *e)
3208{
David Sterba7ec20af2014-07-24 17:34:58 +02003209 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Masonc8b97812008-10-29 14:49:59 -04003210}
Chris Mason9f5fae22007-03-20 14:38:32 -04003211
Chris Mason514ac8a2014-01-03 21:07:00 -08003212/* this returns the number of file bytes represented by the inline item.
3213 * If an item is compressed, this is the uncompressed size
3214 */
3215static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3216 int slot,
3217 struct btrfs_file_extent_item *fi)
3218{
3219 struct btrfs_map_token token;
3220
3221 btrfs_init_map_token(&token);
3222 /*
3223 * return the space used on disk if this item isn't
3224 * compressed or encoded
3225 */
3226 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3227 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3228 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3229 return btrfs_file_extent_inline_item_len(eb,
3230 btrfs_item_nr(slot));
3231 }
3232
3233 /* otherwise use the ram bytes field */
3234 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3235}
3236
3237
Stefan Behrens733f4fb2012-05-25 16:06:10 +02003238/* btrfs_dev_stats_item */
3239static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3240 struct btrfs_dev_stats_item *ptr,
3241 int index)
3242{
3243 u64 val;
3244
3245 read_extent_buffer(eb, &val,
3246 offsetof(struct btrfs_dev_stats_item, values) +
3247 ((unsigned long)ptr) + (index * sizeof(u64)),
3248 sizeof(val));
3249 return val;
3250}
3251
3252static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3253 struct btrfs_dev_stats_item *ptr,
3254 int index, u64 val)
3255{
3256 write_extent_buffer(eb, &val,
3257 offsetof(struct btrfs_dev_stats_item, values) +
3258 ((unsigned long)ptr) + (index * sizeof(u64)),
3259 sizeof(val));
3260}
3261
Arne Jansen630dc772011-09-13 11:06:07 +02003262/* btrfs_qgroup_status_item */
3263BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3264 generation, 64);
3265BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3266 version, 64);
3267BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3268 flags, 64);
Jan Schmidt2f232032013-04-25 16:04:51 +00003269BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3270 rescan, 64);
Arne Jansen630dc772011-09-13 11:06:07 +02003271
3272/* btrfs_qgroup_info_item */
3273BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3274 generation, 64);
3275BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3276BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3277 rfer_cmpr, 64);
3278BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3279BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3280 excl_cmpr, 64);
3281
3282BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3283 struct btrfs_qgroup_info_item, generation, 64);
3284BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3285 rfer, 64);
3286BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3287 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3288BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3289 excl, 64);
3290BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3291 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3292
3293/* btrfs_qgroup_limit_item */
3294BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3295 flags, 64);
3296BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3297 max_rfer, 64);
3298BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3299 max_excl, 64);
3300BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3301 rsv_rfer, 64);
3302BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3303 rsv_excl, 64);
3304
Stefan Behrensa2bff642012-11-05 17:32:20 +01003305/* btrfs_dev_replace_item */
3306BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3307 struct btrfs_dev_replace_item, src_devid, 64);
3308BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3309 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3310 64);
3311BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3312 replace_state, 64);
3313BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3314 time_started, 64);
3315BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3316 time_stopped, 64);
3317BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3318 num_write_errors, 64);
3319BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3320 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3321 64);
3322BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3323 cursor_left, 64);
3324BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3325 cursor_right, 64);
3326
3327BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3328 struct btrfs_dev_replace_item, src_devid, 64);
3329BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3330 struct btrfs_dev_replace_item,
3331 cont_reading_from_srcdev_mode, 64);
3332BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3333 struct btrfs_dev_replace_item, replace_state, 64);
3334BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3335 struct btrfs_dev_replace_item, time_started, 64);
3336BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3337 struct btrfs_dev_replace_item, time_stopped, 64);
3338BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3339 struct btrfs_dev_replace_item, num_write_errors, 64);
3340BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3341 struct btrfs_dev_replace_item,
3342 num_uncorrectable_read_errors, 64);
3343BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3344 struct btrfs_dev_replace_item, cursor_left, 64);
3345BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3346 struct btrfs_dev_replace_item, cursor_right, 64);
3347
Al Viro815745c2011-11-17 15:40:49 -05003348static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
Chris Masone20d96d2007-03-22 12:13:20 -04003349{
3350 return sb->s_fs_info;
3351}
3352
Chris Mason4beb1b82007-03-14 10:31:29 -04003353/* helper function to cast into the data area of the leaf. */
3354#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04003355 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04003356 btrfs_item_offset_nr(leaf, slot)))
3357
3358#define btrfs_item_ptr_offset(leaf, slot) \
3359 ((unsigned long)(btrfs_leaf_data(leaf) + \
3360 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04003361
Josef Bacik67377732010-09-16 16:19:09 -04003362static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3363{
3364 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3365 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3366}
3367
Josef Bacik3b16a4e2011-09-21 15:05:58 -04003368static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3369{
Michal Hockoc62d2552015-11-06 16:28:49 -08003370 return mapping_gfp_constraint(mapping, ~__GFP_FS);
Josef Bacik3b16a4e2011-09-21 15:05:58 -04003371}
3372
Chris Masonb18c6682007-04-17 13:26:50 -04003373/* extent-tree.c */
Chris Mason28f75a02015-02-04 06:59:29 -08003374
3375u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3376
Miao Xie16cdcec2011-04-22 18:12:22 +08003377static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
Josef Bacik9e0baf62011-07-15 15:16:44 +00003378 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08003379{
David Sterba707e8a02014-06-04 19:22:26 +02003380 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
Josef Bacikc4fbb432013-09-17 10:50:06 -04003381 2 * num_items;
Miao Xie16cdcec2011-04-22 18:12:22 +08003382}
3383
Josef Bacik07127182011-08-19 10:29:59 -04003384/*
3385 * Doing a truncate won't result in new nodes or leaves, just what we need for
3386 * COW.
3387 */
3388static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3389 unsigned num_items)
3390{
David Sterba707e8a02014-06-04 19:22:26 +02003391 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
Josef Bacik07127182011-08-19 10:29:59 -04003392}
3393
Josef Bacik1be41b72013-06-12 13:56:06 -04003394int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3395 struct btrfs_root *root);
Josef Bacik0a2b2a82014-01-23 10:54:11 -05003396int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3397 struct btrfs_root *root);
Chris Masonfa9c0d792009-04-03 09:47:43 -04003398void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04003399int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3400 struct btrfs_root *root, unsigned long count);
Chris Masona79b7d42014-05-22 16:18:52 -07003401int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3402 unsigned long count, int wait);
Filipe Manana1a4ed8f2014-10-27 10:44:24 +00003403int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003404int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3405 struct btrfs_root *root, u64 bytenr,
Josef Bacik3173a182013-03-07 14:22:04 -05003406 u64 offset, int metadata, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04003407int btrfs_pin_extent(struct btrfs_root *root,
3408 u64 bytenr, u64 num, int reserved);
Liu Bodcfac412012-12-27 09:01:20 +00003409int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
Chris Masone688b7252011-10-31 20:52:39 -04003410 u64 bytenr, u64 num_bytes);
Josef Bacik8c2a1a32013-06-06 13:19:32 -04003411int btrfs_exclude_logged_extents(struct btrfs_root *root,
3412 struct extent_buffer *eb);
Yan Zheng80ff3852008-10-30 14:20:02 -04003413int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003414 struct btrfs_root *root,
3415 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05003416struct btrfs_block_group_cache *btrfs_lookup_block_group(
3417 struct btrfs_fs_info *info,
3418 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003419void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04003420int get_block_group_index(struct btrfs_block_group_cache *cache);
David Sterba4d75f8a2014-06-15 01:54:12 +02003421struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3422 struct btrfs_root *root, u64 parent,
3423 u64 root_objectid,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003424 struct btrfs_disk_key *key, int level,
Jan Schmidt5581a512012-05-16 17:04:52 +02003425 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003426void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3427 struct btrfs_root *root,
3428 struct extent_buffer *buf,
Jan Schmidt5581a512012-05-16 17:04:52 +02003429 u64 parent, int last_ref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003430int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3431 struct btrfs_root *root,
3432 u64 root_objectid, u64 owner,
Qu Wenruo5846a3c2015-10-26 14:11:18 +08003433 u64 offset, u64 ram_bytes,
3434 struct btrfs_key *ins);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003435int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3436 struct btrfs_root *root,
3437 u64 root_objectid, u64 owner, u64 offset,
3438 struct btrfs_key *ins);
Josef Bacik00361582013-08-14 14:02:47 -04003439int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3440 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
Miao Xiee570fd22014-06-19 10:42:50 +08003441 struct btrfs_key *ins, int is_data, int delalloc);
Chris Masone089f052007-03-16 16:20:31 -04003442int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07003443 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003444int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07003445 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003446int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3447 struct btrfs_root *root,
3448 u64 bytenr, u64 num_bytes, u64 flags,
Josef Bacikb1c79e02013-05-09 13:49:30 -04003449 int level, int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04003450int btrfs_free_extent(struct btrfs_trans_handle *trans,
3451 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02003452 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
Filipe Mananab06c4bf2015-10-23 07:52:54 +01003453 u64 owner, u64 offset);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003454
Miao Xiee570fd22014-06-19 10:42:50 +08003455int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3456 int delalloc);
Chris Masone688b7252011-10-31 20:52:39 -04003457int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3458 u64 start, u64 len);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003459void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3460 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04003461int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04003462 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04003463int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04003464 struct btrfs_root *root,
3465 u64 bytenr, u64 num_bytes, u64 parent,
Filipe Mananab06c4bf2015-10-23 07:52:54 +01003466 u64 root_objectid, u64 owner, u64 offset);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003467
Chris Mason1bbc6212015-04-06 12:46:08 -07003468int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3469 struct btrfs_root *root);
Chris Mason9078a3e2007-04-26 16:46:15 -04003470int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3471 struct btrfs_root *root);
Josef Bacikdcdf7f62015-03-02 16:37:31 -05003472int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3473 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003474int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04003475int btrfs_free_block_groups(struct btrfs_fs_info *info);
3476int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04003477int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04003478int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3479 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04003480 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04003481 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04003482int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
Filipe Manana04216822014-11-27 21:14:15 +00003483 struct btrfs_root *root, u64 group_start,
3484 struct extent_map *em);
Josef Bacik47ab2a62014-09-18 11:20:02 -04003485void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04003486void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3487void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
Josef Bacikea658ba2012-09-11 16:57:25 -04003488void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3489 struct btrfs_root *root);
Miao Xie6d07bce2011-01-05 10:07:31 +00003490u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Chris Mason4184ea72009-03-10 12:39:20 -04003491void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Miao Xie08e007d2012-10-16 11:33:38 +00003492
3493enum btrfs_reserve_flush_enum {
3494 /* If we are in the transaction, we can't flush anything.*/
3495 BTRFS_RESERVE_NO_FLUSH,
3496 /*
3497 * Flushing delalloc may cause deadlock somewhere, in this
3498 * case, use FLUSH LIMIT
3499 */
3500 BTRFS_RESERVE_FLUSH_LIMIT,
3501 BTRFS_RESERVE_FLUSH_ALL,
3502};
3503
Qu Wenruo7cf5b972015-09-08 17:25:55 +08003504int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
Qu Wenruo4ceff072015-09-08 17:22:42 +08003505int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
Qu Wenruo7cf5b972015-09-08 17:25:55 +08003506void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
Qu Wenruo51773be2015-10-08 18:19:37 +08003507void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
3508 u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04003509void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3510 struct btrfs_root *root);
Filipe Manana4fbcdf62015-05-20 14:01:54 +01003511void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003512int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3513 struct inode *inode);
3514void btrfs_orphan_release_metadata(struct inode *inode);
Miao Xied5c12072013-02-28 10:04:33 +00003515int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3516 struct btrfs_block_rsv *rsv,
3517 int nitems,
Jeff Mahoneyee3441b2013-07-09 16:37:21 -04003518 u64 *qgroup_reserved, bool use_global_rsv);
Miao Xied5c12072013-02-28 10:04:33 +00003519void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3520 struct btrfs_block_rsv *rsv,
3521 u64 qgroup_reserved);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04003522int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3523void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
Qu Wenruo7cf5b972015-09-08 17:25:55 +08003524int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
3525void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
Miao Xie66d8f3d2012-09-06 04:02:28 -06003526void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3527struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3528 unsigned short type);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003529void btrfs_free_block_rsv(struct btrfs_root *root,
3530 struct btrfs_block_rsv *rsv);
Chris Masoncdfb0802015-04-06 18:17:00 -07003531void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003532int btrfs_block_rsv_add(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003533 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3534 enum btrfs_reserve_flush_enum flush);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04003535int btrfs_block_rsv_check(struct btrfs_root *root,
Josef Bacik36ba0222011-10-18 12:15:48 -04003536 struct btrfs_block_rsv *block_rsv, int min_factor);
3537int btrfs_block_rsv_refill(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00003538 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3539 enum btrfs_reserve_flush_enum flush);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003540int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3541 struct btrfs_block_rsv *dst_rsv,
3542 u64 num_bytes);
Josef Bacikd52be812013-05-29 14:54:47 -04003543int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3544 struct btrfs_block_rsv *dest, u64 num_bytes,
3545 int min_factor);
Yan, Zhengf0486c62010-05-16 10:46:25 -04003546void btrfs_block_rsv_release(struct btrfs_root *root,
3547 struct btrfs_block_rsv *block_rsv,
3548 u64 num_bytes);
Zhaolei868f4012015-08-05 16:43:27 +08003549int btrfs_inc_block_group_ro(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04003550 struct btrfs_block_group_cache *cache);
Zhaolei868f4012015-08-05 16:43:27 +08003551void btrfs_dec_block_group_ro(struct btrfs_root *root,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003552 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04003553void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00003554u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08003555int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3556 u64 start, u64 end);
Filipe Manana1edb647b2014-12-08 14:01:12 +00003557int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3558 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05003559int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3560 struct btrfs_root *root, u64 type);
Li Dongyangf7039b12011-03-24 10:24:28 +00003561int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08003562
liuboc59021f2011-03-07 02:13:14 +00003563int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02003564int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3565 struct btrfs_fs_info *fs_info);
Liu Bo31e50222012-11-21 14:18:10 +00003566int __get_raid_index(u64 flags);
Filipe Manana9ea24bb2014-10-29 11:57:59 +00003567int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3568void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
Filipe Manana39c2d7f2015-05-20 14:01:55 +01003569void check_system_chunk(struct btrfs_trans_handle *trans,
3570 struct btrfs_root *root,
Filipe Manana4617ea32015-06-09 17:48:21 +01003571 const u64 type);
Chris Masondee26a92007-03-26 16:00:06 -04003572/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003573int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3574 int level, int *slot);
3575int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04003576int btrfs_previous_item(struct btrfs_root *root,
3577 struct btrfs_path *path, u64 min_objectid,
3578 int type);
Wang Shilongade2e0b2014-01-12 21:38:33 +08003579int btrfs_previous_extent_item(struct btrfs_root *root,
3580 struct btrfs_path *path, u64 min_objectid);
Daniel Dresslerb7a03652014-11-12 13:43:09 +09003581void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3582 struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003583 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04003584struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3585struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04003586int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003587 struct btrfs_key *key, int lowest_level,
Eric Sandeende78b512013-01-31 18:21:12 +00003588 u64 min_trans);
Chris Mason3f157a22008-06-25 16:01:31 -04003589int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Eric Sandeende78b512013-01-31 18:21:12 +00003590 struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04003591 u64 min_trans);
Alexander Block70698302012-06-05 21:07:48 +02003592enum btrfs_compare_tree_result {
3593 BTRFS_COMPARE_TREE_NEW,
3594 BTRFS_COMPARE_TREE_DELETED,
3595 BTRFS_COMPARE_TREE_CHANGED,
Josef Bacikba5e8f22013-08-16 16:52:55 -04003596 BTRFS_COMPARE_TREE_SAME,
Alexander Block70698302012-06-05 21:07:48 +02003597};
3598typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3599 struct btrfs_root *right_root,
3600 struct btrfs_path *left_path,
3601 struct btrfs_path *right_path,
3602 struct btrfs_key *key,
3603 enum btrfs_compare_tree_result result,
3604 void *ctx);
3605int btrfs_compare_trees(struct btrfs_root *left_root,
3606 struct btrfs_root *right_root,
3607 btrfs_changed_cb_t cb, void *ctx);
Chris Mason5f39d392007-10-15 16:14:19 -04003608int btrfs_cow_block(struct btrfs_trans_handle *trans,
3609 struct btrfs_root *root, struct extent_buffer *buf,
3610 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04003611 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05003612int btrfs_copy_root(struct btrfs_trans_handle *trans,
3613 struct btrfs_root *root,
3614 struct extent_buffer *buf,
3615 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003616int btrfs_block_can_be_shared(struct btrfs_root *root,
3617 struct extent_buffer *buf);
Tsutomu Itoh4b90c682013-04-16 05:18:49 +00003618void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003619 u32 data_size);
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003620void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003621 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05003622int btrfs_split_item(struct btrfs_trans_handle *trans,
3623 struct btrfs_root *root,
3624 struct btrfs_path *path,
3625 struct btrfs_key *new_key,
3626 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00003627int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3628 struct btrfs_root *root,
3629 struct btrfs_path *path,
3630 struct btrfs_key *new_key);
Kelley Nielsene33d5c32013-11-04 19:33:33 -08003631int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3632 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
Chris Masone089f052007-03-16 16:20:31 -04003633int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3634 *root, struct btrfs_key *key, struct btrfs_path *p, int
3635 ins_len, int cow);
Jan Schmidt5d9e75c42012-05-16 18:25:47 +02003636int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3637 struct btrfs_path *p, u64 time_seq);
Arne Jansen2f38b3e2011-09-13 11:18:10 +02003638int btrfs_search_slot_for_read(struct btrfs_root *root,
3639 struct btrfs_key *key, struct btrfs_path *p,
3640 int find_higher, int return_any);
Chris Mason6702ed42007-08-07 16:15:09 -04003641int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04003642 struct btrfs_root *root, struct extent_buffer *parent,
Eric Sandeende78b512013-01-31 18:21:12 +00003643 int start_slot, u64 *last_ret,
Chris Masona6b6e752007-10-15 16:22:39 -04003644 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02003645void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04003646struct btrfs_path *btrfs_alloc_path(void);
3647void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003648void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08003649void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04003650 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05003651void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3652
Chris Mason85e21ba2008-01-29 15:11:36 -05003653int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3654 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05003655static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3656 struct btrfs_root *root,
3657 struct btrfs_path *path)
3658{
3659 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3660}
3661
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00003662void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01003663 struct btrfs_key *cpu_key, u32 *data_size,
3664 u32 total_data, u32 total_size, int nr);
Chris Masone089f052007-03-16 16:20:31 -04003665int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3666 *root, struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05003667int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3668 struct btrfs_root *root,
3669 struct btrfs_path *path,
3670 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3671
3672static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3673 struct btrfs_root *root,
3674 struct btrfs_path *path,
3675 struct btrfs_key *key,
3676 u32 data_size)
3677{
3678 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3679}
3680
Chris Mason234b63a2007-03-13 10:46:10 -04003681int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Josef Bacik16e75492013-10-22 12:18:51 -04003682int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidt3d7806e2012-06-11 08:29:29 +02003683int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3684 u64 time_seq);
Alexander Block1c8f52a2012-06-19 07:42:25 -06003685static inline int btrfs_next_old_item(struct btrfs_root *root,
3686 struct btrfs_path *p, u64 time_seq)
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003687{
3688 ++p->slots[0];
3689 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
Alexander Block1c8f52a2012-06-19 07:42:25 -06003690 return btrfs_next_old_leaf(root, p, time_seq);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01003691 return 0;
3692}
Alexander Block1c8f52a2012-06-19 07:42:25 -06003693static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3694{
3695 return btrfs_next_old_item(root, p, 0);
3696}
Chris Mason5f39d392007-10-15 16:14:19 -04003697int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04003698int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3699 struct btrfs_block_rsv *block_rsv,
3700 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04003701int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3702 struct btrfs_root *root,
3703 struct extent_buffer *node,
3704 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02003705static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3706{
3707 /*
3708 * Get synced with close_ctree()
3709 */
3710 smp_mb();
3711 return fs_info->closing;
3712}
Miao Xiebabbf1702013-05-14 10:20:43 +00003713
3714/*
3715 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3716 * anything except sleeping. This function is used to check the status of
3717 * the fs.
3718 */
3719static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3720{
3721 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3722 btrfs_fs_closing(root->fs_info));
3723}
3724
David Sterba6c417612011-04-13 15:41:04 +02003725static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3726{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02003727 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02003728 kfree(fs_info->delayed_root);
3729 kfree(fs_info->extent_root);
3730 kfree(fs_info->tree_root);
3731 kfree(fs_info->chunk_root);
3732 kfree(fs_info->dev_root);
3733 kfree(fs_info->csum_root);
Arne Jansenbcef60f2011-09-13 15:23:30 +02003734 kfree(fs_info->quota_root);
Filipe David Borba Mananad8f98032013-08-24 19:51:06 +01003735 kfree(fs_info->uuid_root);
David Sterba6c417612011-04-13 15:41:04 +02003736 kfree(fs_info->super_copy);
3737 kfree(fs_info->super_for_commit);
Qu Wenruof667aef2014-09-23 13:40:08 +08003738 security_free_mnt_opts(&fs_info->security_opts);
David Sterba6c417612011-04-13 15:41:04 +02003739 kfree(fs_info);
3740}
David Sterba7841cb22011-05-31 18:07:27 +02003741
Jan Schmidt097b8a72012-06-21 11:08:04 +02003742/* tree mod log functions from ctree.c */
3743u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3744 struct seq_list *elem);
3745void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3746 struct seq_list *elem);
Jan Schmidt5b6602e2012-10-23 11:28:27 +02003747int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
Jan Schmidt097b8a72012-06-21 11:08:04 +02003748
Chris Masondee26a92007-03-26 16:00:06 -04003749/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05003750int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003751 struct btrfs_path *path,
3752 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05003753int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3754 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003755 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3756 const char *name, int name_len);
3757int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3758 struct btrfs_root *tree_root,
3759 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05003760 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04003761int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3762 struct btrfs_key *key);
3763int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3764 *root, struct btrfs_key *key, struct btrfs_root_item
3765 *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04003766int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3767 struct btrfs_root *root,
3768 struct btrfs_key *key,
3769 struct btrfs_root_item *item);
Miao Xiecb517ea2013-05-15 07:48:19 +00003770int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3771 struct btrfs_path *path, struct btrfs_root_item *root_item,
3772 struct btrfs_key *root_key);
Yan, Zheng76dda932009-09-21 16:00:26 -04003773int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00003774void btrfs_set_root_node(struct btrfs_root_item *item,
3775 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00003776void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003777void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3778 struct btrfs_root *root);
Li Zefan08fe4db2011-03-28 02:01:25 +00003779
Stefan Behrens07b30a42013-08-15 17:11:17 +02003780/* uuid-tree.c */
3781int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3782 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3783 u64 subid);
3784int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3785 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3786 u64 subid);
Stefan Behrens70f80172013-08-15 17:11:23 +02003787int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3788 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3789 u64));
Stefan Behrens07b30a42013-08-15 17:11:17 +02003790
Chris Masondee26a92007-03-26 16:00:06 -04003791/* dir-item.c */
Chris Mason9c520572012-12-17 14:26:57 -05003792int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3793 const char *name, int name_len);
Chris Masond3977122009-01-05 21:25:51 -05003794int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3795 struct btrfs_root *root, const char *name,
Miao Xie16cdcec2011-04-22 18:12:22 +08003796 int name_len, struct inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04003797 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04003798struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3799 struct btrfs_root *root,
3800 struct btrfs_path *path, u64 dir,
3801 const char *name, int name_len,
3802 int mod);
3803struct btrfs_dir_item *
3804btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3805 struct btrfs_root *root,
3806 struct btrfs_path *path, u64 dir,
3807 u64 objectid, const char *name, int name_len,
3808 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003809struct btrfs_dir_item *
3810btrfs_search_dir_index_item(struct btrfs_root *root,
3811 struct btrfs_path *path, u64 dirid,
3812 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003813int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3814 struct btrfs_root *root,
3815 struct btrfs_path *path,
3816 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05003817int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003818 struct btrfs_root *root,
3819 struct btrfs_path *path, u64 objectid,
3820 const char *name, u16 name_len,
3821 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05003822struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3823 struct btrfs_root *root,
3824 struct btrfs_path *path, u64 dir,
3825 const char *name, u16 name_len,
3826 int mod);
Josef Bacik22a94d42011-03-16 16:47:17 -04003827int verify_dir_item(struct btrfs_root *root,
3828 struct extent_buffer *leaf,
3829 struct btrfs_dir_item *dir_item);
Filipe Manana5f5bc6b2014-11-09 08:38:39 +00003830struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3831 struct btrfs_path *path,
3832 const char *name,
3833 int name_len);
Josef Bacik7b128762008-07-24 12:17:14 -04003834
3835/* orphan.c */
3836int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3837 struct btrfs_root *root, u64 offset);
3838int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3839 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003840int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04003841
Chris Masondee26a92007-03-26 16:00:06 -04003842/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05003843int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3844 struct btrfs_root *root,
3845 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003846 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05003847int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3848 struct btrfs_root *root,
3849 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003850 u64 inode_objectid, u64 ref_objectid, u64 *index);
Chris Mason5f39d392007-10-15 16:14:19 -04003851int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3852 struct btrfs_root *root,
3853 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04003854int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04003855 *root, struct btrfs_path *path,
3856 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04003857
Mark Fashehf1863732012-08-08 11:32:27 -07003858struct btrfs_inode_extref *
3859btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3860 struct btrfs_root *root,
3861 struct btrfs_path *path,
3862 const char *name, int name_len,
3863 u64 inode_objectid, u64 ref_objectid, int ins_len,
3864 int cow);
3865
3866int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3867 u64 ref_objectid, const char *name,
3868 int name_len,
3869 struct btrfs_inode_extref **extref_ret);
3870
Chris Masondee26a92007-03-26 16:00:06 -04003871/* file-item.c */
Miao Xiefacc8a222013-07-25 19:22:34 +08003872struct btrfs_dio_private;
Chris Mason459931e2008-12-10 09:10:46 -05003873int btrfs_del_csums(struct btrfs_trans_handle *trans,
3874 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04003875int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003876 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04003877int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
Miao Xie23ea8e52014-09-12 18:43:54 +08003878 struct bio *bio, u64 logical_offset);
Chris Masonb18c6682007-04-17 13:26:50 -04003879int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04003880 struct btrfs_root *root,
3881 u64 objectid, u64 pos,
3882 u64 disk_offset, u64 disk_num_bytes,
3883 u64 num_bytes, u64 offset, u64 ram_bytes,
3884 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04003885int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3886 struct btrfs_root *root,
3887 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04003888 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05003889int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05003890 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04003891 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04003892int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05003893 struct bio *bio, u64 file_start, int contig);
Arne Jansena2de7332011-03-08 14:14:00 +01003894int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3895 struct list_head *list, int search_commit);
Filipe Manana7ffbb592014-06-09 03:48:05 +01003896void btrfs_extent_item_to_extent_map(struct inode *inode,
3897 const struct btrfs_path *path,
3898 struct btrfs_file_extent_item *fi,
3899 const bool new_inline,
3900 struct extent_map *em);
3901
Chris Mason39279cc2007-06-12 06:35:45 -04003902/* inode.c */
Miao Xie8ccf6f192012-10-25 09:28:04 +00003903struct btrfs_delalloc_work {
3904 struct inode *inode;
3905 int wait;
3906 int delay_iput;
3907 struct completion completion;
3908 struct list_head list;
3909 struct btrfs_work work;
3910};
3911
3912struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3913 int wait, int delay_iput);
3914void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3915
Josef Bacikb2675152011-07-18 13:21:36 -04003916struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3917 size_t pg_offset, u64 start, u64 len,
3918 int create);
Josef Bacik00361582013-08-14 14:02:47 -04003919noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
Josef Bacik7ee9e442013-06-21 16:37:03 -04003920 u64 *orig_start, u64 *orig_block_len,
3921 u64 *ram_bytes);
Chris Mason4881ee52008-07-24 09:51:08 -04003922
3923/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04003924#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04003925#define ClearPageChecked ClearPageFsMisc
3926#define SetPageChecked SetPageFsMisc
3927#define PageChecked PageFsMisc
3928#endif
3929
Li Zefanb6973aa2011-07-20 03:46:35 +00003930/* This forces readahead on a given range of bytes in an inode */
3931static inline void btrfs_force_ra(struct address_space *mapping,
3932 struct file_ra_state *ra, struct file *file,
3933 pgoff_t offset, unsigned long req_size)
3934{
3935 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3936}
3937
Chris Mason3de45862008-11-17 21:02:50 -05003938struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3939int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04003940int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3941 struct btrfs_root *root,
3942 struct inode *dir, struct inode *inode,
3943 const char *name, int name_len);
3944int btrfs_add_link(struct btrfs_trans_handle *trans,
3945 struct inode *parent_inode, struct inode *inode,
3946 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003947int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3948 struct btrfs_root *root,
3949 struct inode *dir, u64 objectid,
3950 const char *name, int name_len);
Josef Bacik2aaa6652012-08-29 14:27:18 -04003951int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3952 int front);
Chris Masone02119d2008-09-05 16:13:11 -04003953int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3954 struct btrfs_root *root,
3955 struct inode *inode, u64 new_size,
3956 u32 min_type);
3957
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003958int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Miao Xie6c255e62014-03-06 13:55:01 +08003959int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3960 int nr);
Josef Bacik2ac55d42010-02-03 19:33:23 +00003961int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3962 struct extent_state **cached_state);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003963int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Filipe David Borba Manana63541922014-01-07 11:47:46 +00003964 struct btrfs_root *new_root,
3965 struct btrfs_root *parent_root,
3966 u64 new_dirid);
David Woodhouse64a16702009-07-15 23:29:37 +01003967int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3968 size_t size, struct bio *bio,
3969 unsigned long bio_flags);
Nick Pigginc2ec1752009-03-31 15:23:21 -07003970int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04003971int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04003972void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01003973int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04003974struct inode *btrfs_alloc_inode(struct super_block *sb);
3975void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04003976int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003977int btrfs_init_cachep(void);
3978void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04003979long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05303980struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00003981 struct btrfs_root *root, int *was_new);
Chris Masona52d9a82007-08-27 16:49:44 -04003982struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +02003983 size_t pg_offset, u64 start, u64 end,
Chris Masona52d9a82007-08-27 16:49:44 -04003984 int create);
3985int btrfs_update_inode(struct btrfs_trans_handle *trans,
3986 struct btrfs_root *root,
3987 struct inode *inode);
Josef Bacikbe6aef62012-10-22 15:43:12 -04003988int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3989 struct btrfs_root *root, struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04003990int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05003991int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003992void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3993 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05003994int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003995void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003996void btrfs_add_delayed_iput(struct inode *inode);
3997void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04003998int btrfs_prealloc_file_range(struct inode *inode, int mode,
3999 u64 start, u64 num_bytes, u64 min_size,
4000 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04004001int btrfs_prealloc_file_range_trans(struct inode *inode,
4002 struct btrfs_trans_handle *trans, int mode,
4003 u64 start, u64 num_bytes, u64 min_size,
4004 loff_t actual_len, u64 *alloc_hint);
Filipe Mananab38ef712014-11-13 17:01:45 +00004005int btrfs_inode_check_errors(struct inode *inode);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04004006extern const struct dentry_operations btrfs_dentry_operations;
Josef Bacik6a3891c2015-03-16 17:38:52 -04004007#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4008void btrfs_test_inode_set_ops(struct inode *inode);
4009#endif
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04004010
4011/* ioctl.c */
4012long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02004013void btrfs_update_iflags(struct inode *inode);
4014void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Stefan Behrensdd5f9612013-08-15 17:11:20 +02004015int btrfs_is_empty_uuid(u8 *uuid);
Chris Mason4cb53002011-05-24 15:35:30 -04004016int btrfs_defrag_file(struct inode *inode, struct file *file,
4017 struct btrfs_ioctl_defrag_range_args *range,
4018 u64 newer_than, unsigned long max_pages);
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02004019void btrfs_get_block_group_info(struct list_head *groups_list,
4020 struct btrfs_ioctl_space_info *space);
Stefan Behrens35a36212013-08-14 18:12:25 +02004021void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
4022 struct btrfs_ioctl_balance_args *bargs);
4023
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02004024
Chris Mason39279cc2007-06-12 06:35:45 -04004025/* file.c */
Miao Xie9247f312012-11-26 09:24:43 +00004026int btrfs_auto_defrag_init(void);
4027void btrfs_auto_defrag_exit(void);
Chris Mason4cb53002011-05-24 15:35:30 -04004028int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
4029 struct inode *inode);
4030int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Miao Xie26176e72012-11-26 09:26:20 +00004031void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04004032int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Josef Bacik7014cdb2012-08-30 20:06:49 -04004033void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
4034 int skip_pinned);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07004035extern const struct file_operations btrfs_file_operations;
Josef Bacik5dc562c2012-08-17 13:14:17 -04004036int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
4037 struct btrfs_root *root, struct inode *inode,
4038 struct btrfs_path *path, u64 start, u64 end,
Filipe David Borba Manana1acae572014-01-07 11:42:27 +00004039 u64 *drop_end, int drop_cache,
4040 int replace_extent,
4041 u32 extent_item_size,
4042 int *key_inserted);
Josef Bacik5dc562c2012-08-17 13:14:17 -04004043int btrfs_drop_extents(struct btrfs_trans_handle *trans,
4044 struct btrfs_root *root, struct inode *inode, u64 start,
Josef Bacik26714852012-08-29 12:24:27 -04004045 u64 end, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04004046int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04004047 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04004048int btrfs_release_file(struct inode *inode, struct file *file);
Josef Bacikbe1a12a2011-04-06 13:05:22 -04004049int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
4050 struct page **pages, size_t num_pages,
4051 loff_t pos, size_t write_bytes,
4052 struct extent_state **cached);
Filipe Manana728404d2014-10-10 09:43:11 +01004053int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
Sage Weil6bf13c02008-06-10 10:07:39 -04004054
Chris Mason6702ed42007-08-07 16:15:09 -04004055/* tree-defrag.c */
4056int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
Eric Sandeende78b512013-01-31 18:21:12 +00004057 struct btrfs_root *root);
Josef Bacik58176a92007-08-29 15:47:34 -04004058
4059/* sysfs.c */
4060int btrfs_init_sysfs(void);
4061void btrfs_exit_sysfs(void);
Anand Jain96f31362015-08-14 18:32:46 +08004062int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
Anand Jain6618a592015-08-14 18:32:47 +08004063void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
Josef Bacik58176a92007-08-29 15:47:34 -04004064
Josef Bacik5103e942007-11-16 11:45:54 -05004065/* xattr.c */
4066ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04004067
Chris Masonedbd8d42007-12-21 16:27:24 -05004068/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04004069int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04004070int btrfs_sync_fs(struct super_block *sb, int wait);
Joe Perches533574c2012-07-30 14:40:13 -07004071
4072#ifdef CONFIG_PRINTK
4073__printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004074void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
Joe Perches533574c2012-07-30 14:40:13 -07004075#else
4076static inline __printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004077void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
Joe Perches533574c2012-07-30 14:40:13 -07004078{
4079}
4080#endif
4081
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004082#define btrfs_emerg(fs_info, fmt, args...) \
4083 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4084#define btrfs_alert(fs_info, fmt, args...) \
4085 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4086#define btrfs_crit(fs_info, fmt, args...) \
4087 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4088#define btrfs_err(fs_info, fmt, args...) \
4089 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4090#define btrfs_warn(fs_info, fmt, args...) \
4091 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4092#define btrfs_notice(fs_info, fmt, args...) \
4093 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4094#define btrfs_info(fs_info, fmt, args...) \
4095 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004096
David Sterba08a84e22015-10-08 08:48:52 +02004097/*
4098 * Wrappers that use printk_in_rcu
4099 */
4100#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
4101 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4102#define btrfs_alert_in_rcu(fs_info, fmt, args...) \
4103 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4104#define btrfs_crit_in_rcu(fs_info, fmt, args...) \
4105 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4106#define btrfs_err_in_rcu(fs_info, fmt, args...) \
4107 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
4108#define btrfs_warn_in_rcu(fs_info, fmt, args...) \
4109 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4110#define btrfs_notice_in_rcu(fs_info, fmt, args...) \
4111 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4112#define btrfs_info_in_rcu(fs_info, fmt, args...) \
4113 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
4114
David Sterba24aa6b42015-10-08 10:27:02 +02004115/*
4116 * Wrappers that use a ratelimited printk_in_rcu
4117 */
4118#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
4119 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4120#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
4121 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4122#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
4123 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4124#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
4125 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
4126#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
4127 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4128#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
4129 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4130#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
4131 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
4132
David Sterba1dd6d7c2015-10-08 10:51:11 +02004133/*
4134 * Wrappers that use a ratelimited printk
4135 */
4136#define btrfs_emerg_rl(fs_info, fmt, args...) \
4137 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
4138#define btrfs_alert_rl(fs_info, fmt, args...) \
4139 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
4140#define btrfs_crit_rl(fs_info, fmt, args...) \
4141 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
4142#define btrfs_err_rl(fs_info, fmt, args...) \
4143 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
4144#define btrfs_warn_rl(fs_info, fmt, args...) \
4145 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
4146#define btrfs_notice_rl(fs_info, fmt, args...) \
4147 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
4148#define btrfs_info_rl(fs_info, fmt, args...) \
4149 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004150#ifdef DEBUG
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004151#define btrfs_debug(fs_info, fmt, args...) \
4152 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
David Sterba08a84e22015-10-08 08:48:52 +02004153#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4154 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
David Sterba24aa6b42015-10-08 10:27:02 +02004155#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4156 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
David Sterba1dd6d7c2015-10-08 10:51:11 +02004157#define btrfs_debug_rl(fs_info, fmt, args...) \
4158 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004159#else
4160#define btrfs_debug(fs_info, fmt, args...) \
4161 no_printk(KERN_DEBUG fmt, ##args)
David Sterba08a84e22015-10-08 08:48:52 +02004162#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4163 no_printk(KERN_DEBUG fmt, ##args)
David Sterba24aa6b42015-10-08 10:27:02 +02004164#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4165 no_printk(KERN_DEBUG fmt, ##args)
David Sterba1dd6d7c2015-10-08 10:51:11 +02004166#define btrfs_debug_rl(fs_info, fmt, args...) \
4167 no_printk(KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05004168#endif
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00004169
David Sterba08a84e22015-10-08 08:48:52 +02004170#define btrfs_printk_in_rcu(fs_info, fmt, args...) \
4171do { \
4172 rcu_read_lock(); \
4173 btrfs_printk(fs_info, fmt, ##args); \
4174 rcu_read_unlock(); \
4175} while (0)
4176
David Sterba24aa6b42015-10-08 10:27:02 +02004177#define btrfs_printk_ratelimited(fs_info, fmt, args...) \
4178do { \
4179 static DEFINE_RATELIMIT_STATE(_rs, \
4180 DEFAULT_RATELIMIT_INTERVAL, \
4181 DEFAULT_RATELIMIT_BURST); \
4182 if (__ratelimit(&_rs)) \
4183 btrfs_printk(fs_info, fmt, ##args); \
4184} while (0)
4185
4186#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
4187do { \
4188 rcu_read_lock(); \
4189 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
4190 rcu_read_unlock(); \
4191} while (0)
4192
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004193#ifdef CONFIG_BTRFS_ASSERT
4194
David Sterbac0d19e22015-04-24 19:11:57 +02004195__cold
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004196static inline void assfail(char *expr, char *file, int line)
4197{
Frank Holtonefe120a2013-12-20 11:37:06 -05004198 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
Josef Bacik2e17c7c2013-08-26 16:53:15 -04004199 expr, file, line);
4200 BUG();
4201}
4202
4203#define ASSERT(expr) \
4204 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4205#else
4206#define ASSERT(expr) ((void)0)
4207#endif
4208
4209#define btrfs_assert()
Joe Perches533574c2012-07-30 14:40:13 -07004210__printf(5, 6)
David Sterbac0d19e22015-04-24 19:11:57 +02004211__cold
liuboacce9522011-01-06 19:30:25 +08004212void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01004213 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08004214
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04004215const char *btrfs_decode_error(int errno);
Joe Perches533574c2012-07-30 14:40:13 -07004216
David Sterbac0d19e22015-04-24 19:11:57 +02004217__cold
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004218void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4219 struct btrfs_root *root, const char *function,
4220 unsigned int line, int errno);
4221
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06004222#define btrfs_set_fs_incompat(__fs_info, opt) \
4223 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4224
4225static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4226 u64 flag)
4227{
4228 struct btrfs_super_block *disk_super;
4229 u64 features;
4230
4231 disk_super = fs_info->super_copy;
4232 features = btrfs_super_incompat_flags(disk_super);
4233 if (!(features & flag)) {
Miao Xieceda0862013-04-11 10:30:16 +00004234 spin_lock(&fs_info->super_lock);
4235 features = btrfs_super_incompat_flags(disk_super);
4236 if (!(features & flag)) {
4237 features |= flag;
4238 btrfs_set_super_incompat_flags(disk_super, features);
Frank Holtonefe120a2013-12-20 11:37:06 -05004239 btrfs_info(fs_info, "setting %llu feature flag",
Miao Xieceda0862013-04-11 10:30:16 +00004240 flag);
4241 }
4242 spin_unlock(&fs_info->super_lock);
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06004243 }
4244}
4245
Josef Bacik3173a182013-03-07 14:22:04 -05004246#define btrfs_fs_incompat(fs_info, opt) \
4247 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4248
4249static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4250{
4251 struct btrfs_super_block *disk_super;
4252 disk_super = fs_info->super_copy;
4253 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4254}
4255
David Sterba005d6422012-09-18 07:52:32 -06004256/*
4257 * Call btrfs_abort_transaction as early as possible when an error condition is
4258 * detected, that way the exact line number is reported.
4259 */
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004260#define btrfs_abort_transaction(trans, root, errno) \
4261do { \
David Sterba1a9a8a72015-04-24 19:11:54 +02004262 /* Report first abort since mount */ \
4263 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4264 &((root)->fs_info->fs_state))) { \
4265 WARN(1, KERN_DEBUG \
4266 "BTRFS: Transaction aborted (error %d)\n", \
4267 (errno)); \
4268 } \
4269 __btrfs_abort_transaction((trans), (root), __func__, \
4270 __LINE__, (errno)); \
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004271} while (0)
liuboacce9522011-01-06 19:30:25 +08004272
Anand Jaina4553fe2015-09-25 14:43:01 +08004273#define btrfs_std_error(fs_info, errno, fmt, args...) \
Jeff Mahoney4da35112012-03-01 14:57:30 +01004274do { \
4275 __btrfs_std_error((fs_info), __func__, __LINE__, \
4276 (errno), fmt, ##args); \
liuboacce9522011-01-06 19:30:25 +08004277} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04004278
Joe Perches533574c2012-07-30 14:40:13 -07004279__printf(5, 6)
David Sterbac0d19e22015-04-24 19:11:57 +02004280__cold
Jeff Mahoney8c342932011-10-03 23:22:31 -04004281void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4282 unsigned int line, int errno, const char *fmt, ...);
4283
Eric Sandeenaa43a172013-01-31 00:54:55 +00004284/*
4285 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4286 * will panic(). Otherwise we BUG() here.
4287 */
Jeff Mahoney8c342932011-10-03 23:22:31 -04004288#define btrfs_panic(fs_info, errno, fmt, args...) \
4289do { \
Eric Sandeenaa43a172013-01-31 00:54:55 +00004290 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4291 BUG(); \
Chris Masoneb60cea2007-02-02 09:18:22 -05004292} while (0)
4293
4294/* acl.c */
4295#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02004296struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Christoph Hellwig996a7102013-12-20 05:16:43 -08004297int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
Chris Masoneb60cea2007-02-02 09:18:22 -05004298int btrfs_init_acl(struct btrfs_trans_handle *trans,
4299 struct inode *inode, struct inode *dir);
Li Zefan9b89d952011-07-14 03:17:39 +00004300#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10004301#define btrfs_get_acl NULL
Christoph Hellwig996a7102013-12-20 05:16:43 -08004302#define btrfs_set_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00004303static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4304 struct inode *inode, struct inode *dir)
4305{
4306 return 0;
4307}
Li Zefan9b89d952011-07-14 03:17:39 +00004308#endif
Chris Masoneb60cea2007-02-02 09:18:22 -05004309
4310/* relocation.c */
4311int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4312int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4313 struct btrfs_root *root);
4314int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4315 struct btrfs_root *root);
4316int btrfs_recover_relocation(struct btrfs_root *root);
4317int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Josef Bacik83d4cfd2013-08-30 15:09:51 -04004318int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4319 struct btrfs_root *root, struct extent_buffer *buf,
4320 struct extent_buffer *cow);
Zhaolei147d2562015-08-06 20:58:11 +08004321void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
Chris Masoneb60cea2007-02-02 09:18:22 -05004322 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01004323int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Chris Masoneb60cea2007-02-02 09:18:22 -05004324 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01004325
4326/* scrub.c */
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01004327int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4328 u64 end, struct btrfs_scrub_progress *progress,
Stefan Behrens63a212a2012-11-05 18:29:28 +01004329 int readonly, int is_dev_replace);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004330void btrfs_scrub_pause(struct btrfs_root *root);
Jeff Mahoney143bede2012-03-01 14:56:26 +01004331void btrfs_scrub_continue(struct btrfs_root *root);
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01004332int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4333int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4334 struct btrfs_device *dev);
Arne Jansena2de7332011-03-08 14:14:00 +01004335int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4336 struct btrfs_scrub_progress *progress);
4337
Miao Xiec404e0d2014-01-30 16:46:55 +08004338/* dev-replace.c */
4339void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4340void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
Miao Xie42452152014-11-25 16:39:28 +08004341void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4342
4343static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4344{
4345 btrfs_bio_counter_sub(fs_info, 1);
4346}
Miao Xiec404e0d2014-01-30 16:46:55 +08004347
Arne Jansen7414a032011-05-23 14:33:49 +02004348/* reada.c */
4349struct reada_control {
4350 struct btrfs_root *root; /* tree to prefetch */
4351 struct btrfs_key key_start;
4352 struct btrfs_key key_end; /* exclusive */
4353 atomic_t elems;
4354 struct kref refcnt;
4355 wait_queue_head_t wait;
4356};
4357struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4358 struct btrfs_key *start, struct btrfs_key *end);
4359int btrfs_reada_wait(void *handle);
4360void btrfs_reada_detach(void *handle);
4361int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4362 u64 start, int err);
4363
Jan Schmidt95a06072012-05-29 17:06:54 +02004364static inline int is_fstree(u64 rootid)
4365{
4366 if (rootid == BTRFS_FS_TREE_OBJECTID ||
Qu Wenruoe09fe2d2015-02-27 16:24:23 +08004367 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4368 !btrfs_qgroup_level(rootid)))
Jan Schmidt95a06072012-05-29 17:06:54 +02004369 return 1;
4370 return 0;
4371}
David Sterba210549e2013-02-09 23:38:06 +00004372
4373static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4374{
4375 return signal_pending(current);
4376}
4377
Josef Bacikaaedb552013-10-11 14:44:09 -04004378/* Sanity test specific functions */
4379#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4380void btrfs_test_destroy_inode(struct inode *inode);
4381#endif
David Sterba210549e2013-02-09 23:38:06 +00004382
David Sterbafccb84c2014-09-29 23:53:21 +02004383static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4384{
4385#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4386 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))
4387 return 1;
4388#endif
4389 return 0;
4390}
4391
Chris Masoneb60cea2007-02-02 09:18:22 -05004392#endif