blob: 2fcc3c30d471fd95aee3e8e4e942f27d016e6fde [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>
Ingo Molnar174cd4b2017-02-02 19:15:33 +010023#include <linux/sched/signal.h>
Chris Mason810191f2007-10-15 16:18:55 -040024#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040025#include <linux/fs.h>
Arne Jansena2de7332011-03-08 14:14:00 +010026#include <linux/rwsem.h>
Stefan Behrens803b2f52013-08-15 17:11:21 +020027#include <linux/semaphore.h>
Josef Bacik58176a92007-08-29 15:47:34 -040028#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040029#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040030#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Stefan Schmidtf8b18082011-01-12 10:30:42 +010032#include <linux/kobject.h>
liubo1abe9b82011-03-24 11:18:59 +000033#include <trace/events/btrfs.h>
Chris Mason479965d2007-10-15 16:14:27 -040034#include <asm/kmap_types.h>
Josef Bacik3b16a4e2011-09-21 15:05:58 -040035#include <linux/pagemap.h>
Filipe Brandenburger55e301f2013-01-29 06:04:50 +000036#include <linux/btrfs.h>
Jeff Mahoneydb671162016-04-01 16:14:29 -040037#include <linux/btrfs_tree.h>
Miao Xie21c7e752014-05-13 17:29:04 -070038#include <linux/workqueue.h>
Qu Wenruof667aef2014-09-23 13:40:08 +080039#include <linux/security.h>
Byongho Leeee221842015-12-15 01:42:10 +090040#include <linux/sizes.h>
Jeff Mahoney897a41b2016-08-31 23:55:33 -040041#include <linux/dynamic_debug.h>
Elena Reshetova1e4f4712017-03-03 10:55:14 +020042#include <linux/refcount.h>
Chris Masond1310b22008-01-24 16:13:08 -050043#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040044#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040045#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040046
Chris Masone089f052007-03-16 16:20:31 -040047struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040048struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040049struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040050extern struct kmem_cache *btrfs_trans_handle_cachep;
Chris Mason35b7e472007-05-02 15:53:43 -040051extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040052extern struct kmem_cache *btrfs_path_cachep;
Josef Bacikdc89e982011-01-28 17:05:48 -050053extern struct kmem_cache *btrfs_free_space_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040054struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040055
Josef Bacik294e30f2013-10-09 12:00:56 -040056#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
57#define STATIC noinline
58#else
59#define STATIC static noinline
60#endif
61
Zach Browncdb4c572013-02-20 00:55:13 +000062#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
Chris Masoneb60cea2007-02-02 09:18:22 -050063
Stefan Behrens72d7aef2012-11-06 14:57:46 +010064#define BTRFS_MAX_MIRRORS 3
Stefan Behrens94598ba2012-03-27 14:21:26 -040065
Chris Mason4008c042009-02-12 14:09:45 -050066#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040067
Yan Zheng5d4f98a2009-06-10 10:45:14 -040068#define BTRFS_COMPAT_EXTENT_TREE_V0
69
Chris Masonfec577f2007-02-26 10:40:21 -050070/*
Chris Mason727011e2010-08-06 13:21:20 -040071 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
73 */
74#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75
76/*
Chris Masone20d96d2007-03-22 12:13:20 -040077 * we can actually store much bigger names, but lets not confuse the rest
78 * of linux
79 */
80#define BTRFS_NAME_LEN 255
81
Mark Fashehf1863732012-08-08 11:32:27 -070082/*
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
85 * inode ref items.
86 */
87#define BTRFS_LINK_MAX 65535U
88
David Sterba4d4ab6d2015-11-19 11:42:31 +010089static const int btrfs_csum_sizes[] = { 4 };
Josef Bacik607d4322008-12-02 07:17:45 -050090
Chris Mason509659c2007-05-10 12:36:17 -040091/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -050092#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -040093
Stefan Behrens3d136a12012-02-03 11:20:04 +010094/* ioprio of readahead is set to idle */
95#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
96
Byongho Leeee221842015-12-15 01:42:10 +090097#define BTRFS_DIRTY_METADATA_THRESH SZ_32M
Miao Xiee2d84522013-01-29 10:09:20 +000098
Byongho Leeee221842015-12-15 01:42:10 +090099#define BTRFS_MAX_EXTENT_SIZE SZ_128M
Josef Bacikdcab6a32015-02-11 15:08:59 -0500100
David Sterba823bb202017-01-04 11:09:51 +0100101/*
102 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
103 */
104static inline u32 count_max_extents(u64 size)
105{
106 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
107}
108
Chris Mason0b86a832008-03-24 15:01:56 -0400109struct btrfs_mapping_tree {
110 struct extent_map_tree map_tree;
111};
112
Chris Mason0b86a832008-03-24 15:01:56 -0400113static inline unsigned long btrfs_chunk_item_size(int num_stripes)
114{
115 BUG_ON(num_stripes == 0);
116 return sizeof(struct btrfs_chunk) +
117 sizeof(struct btrfs_stripe) * (num_stripes - 1);
118}
119
liuboacce9522011-01-06 19:30:25 +0800120/*
121 * File system states
122 */
Miao Xie87533c42013-01-29 10:14:48 +0000123#define BTRFS_FS_STATE_ERROR 0
Miao Xiedc81cdc2013-02-20 23:32:52 -0700124#define BTRFS_FS_STATE_REMOUNTING 1
David Sterba08748812013-03-12 14:46:08 +0000125#define BTRFS_FS_STATE_TRANS_ABORTED 2
Miao Xiec404e0d2014-01-30 16:46:55 +0800126#define BTRFS_FS_STATE_DEV_REPLACING 3
Jeff Mahoney7c0260e2016-06-20 14:14:09 -0400127#define BTRFS_FS_STATE_DUMMY_FS_INFO 4
liuboacce9522011-01-06 19:30:25 +0800128
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400129#define BTRFS_BACKREF_REV_MAX 256
130#define BTRFS_BACKREF_REV_SHIFT 56
131#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
132 BTRFS_BACKREF_REV_SHIFT)
133
134#define BTRFS_OLD_BACKREF_REV 0
135#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400136
Chris Masonfec577f2007-02-26 10:40:21 -0500137/*
138 * every tree block (leaf or node) starts with this header.
139 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400140struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400141 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400142 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400143 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400144 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400145 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400146
147 /* allowed to be different from the super from here on down */
148 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400149 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400150 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400151 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400152 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500153} __attribute__ ((__packed__));
154
Chris Mason0b86a832008-03-24 15:01:56 -0400155/*
156 * this is a very generous portion of the super block, giving us
157 * room to translate 14 chunks with 3 stripes each.
158 */
159#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
160
Chris Masonfec577f2007-02-26 10:40:21 -0500161/*
Chris Masonaf31f5e2011-11-03 15:17:42 -0400162 * just in case we somehow lose the roots and are not able to mount,
163 * we store an array of the roots from previous transactions
164 * in the super.
165 */
166#define BTRFS_NUM_BACKUP_ROOTS 4
167struct btrfs_root_backup {
168 __le64 tree_root;
169 __le64 tree_root_gen;
170
171 __le64 chunk_root;
172 __le64 chunk_root_gen;
173
174 __le64 extent_root;
175 __le64 extent_root_gen;
176
177 __le64 fs_root;
178 __le64 fs_root_gen;
179
180 __le64 dev_root;
181 __le64 dev_root_gen;
182
183 __le64 csum_root;
184 __le64 csum_root_gen;
185
186 __le64 total_bytes;
187 __le64 bytes_used;
188 __le64 num_devices;
189 /* future */
Masanari Iidad1423242012-10-31 15:16:32 +0000190 __le64 unused_64[4];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400191
192 u8 tree_root_level;
193 u8 chunk_root_level;
194 u8 extent_root_level;
195 u8 fs_root_level;
196 u8 dev_root_level;
197 u8 csum_root_level;
198 /* future and to align */
199 u8 unused_8[10];
200} __attribute__ ((__packed__));
201
202/*
Chris Masonfec577f2007-02-26 10:40:21 -0500203 * the super block basically lists the main trees of the FS
204 * it currently lacks any block count etc etc
205 */
Chris Mason234b63a2007-03-13 10:46:10 -0400206struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400207 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400208 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500209 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400210 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400211 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400212
213 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400214 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400215 __le64 generation;
216 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400217 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400218 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500219
220 /* this will help find the new super based on the log root */
221 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400222 __le64 total_bytes;
223 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400224 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400225 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400226 __le32 sectorsize;
227 __le32 nodesize;
David Sterba707e8a02014-06-04 19:22:26 +0200228 __le32 __unused_leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500229 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400230 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400231 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500232 __le64 compat_flags;
233 __le64 compat_ro_flags;
234 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500235 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400236 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400237 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400238 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400239 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500240
Chris Mason7ae9c092008-04-18 10:29:49 -0400241 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500242
Josef Bacik0af3d002010-06-21 14:48:16 -0400243 __le64 cache_generation;
Stefan Behrens26432792013-08-15 17:11:22 +0200244 __le64 uuid_tree_generation;
Josef Bacik0af3d002010-06-21 14:48:16 -0400245
Chris Masonc3027eb2008-12-08 16:40:21 -0500246 /* future expansion */
Stefan Behrens26432792013-08-15 17:11:22 +0200247 __le64 reserved[30];
Chris Mason0b86a832008-03-24 15:01:56 -0400248 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400249 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
Chris Masoncfaa7292007-02-21 17:04:57 -0500250} __attribute__ ((__packed__));
251
Chris Masonfec577f2007-02-26 10:40:21 -0500252/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500253 * Compat flags that we support. If any incompat flags are set other than the
254 * ones specified below then we will fail to mount
255 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400256#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500257#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
258#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
Omar Sandoval70f6d822015-09-29 20:50:38 -0700259
260#define BTRFS_FEATURE_COMPAT_RO_SUPP \
Omar Sandoval6675df32016-09-22 17:24:22 -0700261 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
262 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
Omar Sandoval70f6d822015-09-29 20:50:38 -0700263
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500264#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
265#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
266
Josef Bacik0af3d002010-06-21 14:48:16 -0400267#define BTRFS_FEATURE_INCOMPAT_SUPP \
268 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
Josef Bacik67377732010-09-16 16:19:09 -0400269 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800270 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
Chris Mason727011e2010-08-06 13:21:20 -0400271 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
Mark Fashehf1863732012-08-08 11:32:27 -0700272 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
Nick Terrell5c1aab12017-08-09 19:39:02 -0700273 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
David Woodhouse53b381b2013-01-29 18:40:14 -0500274 BTRFS_FEATURE_INCOMPAT_RAID56 | \
Josef Bacik3173a182013-03-07 14:22:04 -0500275 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
Josef Bacik16e75492013-10-22 12:18:51 -0400276 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
277 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500278
Jeff Mahoney2eaa0552013-11-15 15:33:55 -0500279#define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
280 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
281#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
Josef Bacikf2b636e2008-12-02 06:36:08 -0500282
283/*
Chris Mason62e27492007-03-15 12:56:47 -0400284 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500285 * the item in the leaf (relative to the start of the data area)
286 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400287struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400288 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400289 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400290 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500291} __attribute__ ((__packed__));
292
Chris Masonfec577f2007-02-26 10:40:21 -0500293/*
294 * leaves have an item area and a data area:
295 * [item0, item1....itemN] [free space] [dataN...data1, data0]
296 *
297 * The data is separate from the items to get the keys closer together
298 * during searches.
299 */
Chris Mason234b63a2007-03-13 10:46:10 -0400300struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400301 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400302 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500303} __attribute__ ((__packed__));
304
Chris Masonfec577f2007-02-26 10:40:21 -0500305/*
306 * all non-leaf blocks are nodes, they hold only keys and pointers to
307 * other blocks
308 */
Chris Mason123abc82007-03-14 14:14:43 -0400309struct btrfs_key_ptr {
310 struct btrfs_disk_key key;
311 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500312 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400313} __attribute__ ((__packed__));
314
Chris Mason234b63a2007-03-13 10:46:10 -0400315struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400316 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400317 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500318} __attribute__ ((__packed__));
319
Chris Masonfec577f2007-02-26 10:40:21 -0500320/*
Chris Mason234b63a2007-03-13 10:46:10 -0400321 * btrfs_paths remember the path taken from the root down to the leaf.
322 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500323 * to any other levels that are present.
324 *
325 * The slots array records the index of the item or block pointer
326 * used while walking the tree.
327 */
David Sterbae4058b52015-11-27 16:31:35 +0100328enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
Chris Mason234b63a2007-03-13 10:46:10 -0400329struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400330 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400331 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400332 /* if there is real range locking, this locks field will change */
David Sterba4fb72bf2015-11-27 16:31:45 +0100333 u8 locks[BTRFS_MAX_LEVEL];
David Sterbadccabfa2015-11-27 16:31:38 +0100334 u8 reada;
Chris Mason925baed2008-06-25 16:01:30 -0400335 /* keep some upper locks as we walk down */
David Sterba7853f152015-11-27 16:31:42 +0100336 u8 lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500337
338 /*
339 * set by btrfs_split_item, tells search_slot to keep all locks
340 * and to force calls to keep space in the nodes
341 */
Chris Masonb9473432009-03-13 11:00:37 -0400342 unsigned int search_for_split:1;
343 unsigned int keep_locks:1;
344 unsigned int skip_locking:1;
345 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400346 unsigned int search_commit_root:1;
Josef Bacik3f8a18c2014-03-28 17:16:01 -0400347 unsigned int need_commit_sem:1;
Filipe Manana5f5bc6b2014-11-09 08:38:39 +0000348 unsigned int skip_release_on_error:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500349};
Jeff Mahoneyda170662016-06-15 09:22:56 -0400350#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400351 sizeof(struct btrfs_item))
Stefan Behrense922e082012-11-05 17:26:40 +0100352struct btrfs_dev_replace {
353 u64 replace_state; /* see #define above */
354 u64 time_started; /* seconds since 1-Jan-1970 */
355 u64 time_stopped; /* seconds since 1-Jan-1970 */
356 atomic64_t num_write_errors;
357 atomic64_t num_uncorrectable_read_errors;
358
359 u64 cursor_left;
360 u64 committed_cursor_left;
361 u64 cursor_left_last_write_of_item;
362 u64 cursor_right;
363
364 u64 cont_reading_from_srcdev_mode; /* see #define above */
365
366 int is_valid;
367 int item_needs_writeback;
368 struct btrfs_device *srcdev;
369 struct btrfs_device *tgtdev;
370
371 pid_t lock_owner;
372 atomic_t nesting_level;
373 struct mutex lock_finishing_cancel_unmount;
Liu Bo73beece2015-07-17 16:49:19 +0800374 rwlock_t lock;
375 atomic_t read_locks;
376 atomic_t blocking_readers;
377 wait_queue_head_t read_lock_wq;
Stefan Behrense922e082012-11-05 17:26:40 +0100378
379 struct btrfs_scrub_progress scrub_progress;
380};
381
Jeff Mahoneyc1895442014-05-27 12:59:57 -0400382/* For raid type sysfs entries */
383struct raid_kobject {
384 int raid_type;
385 struct kobject kobj;
386};
387
Chris Mason6324fbf2008-03-24 15:01:59 -0400388struct btrfs_space_info {
Miao Xie26b47ff2014-01-15 20:00:54 +0800389 spinlock_t lock;
Josef Bacik6a632092009-02-20 11:00:09 -0500390
Josef Bacik89a55892010-10-14 14:52:27 -0400391 u64 total_bytes; /* total bytes in the space,
392 this doesn't take mirrors into account */
Yan, Zhengb742bb822010-05-16 10:46:24 -0400393 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -0700394 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -0500395 u64 bytes_pinned; /* total bytes pinned, will be freed when the
396 transaction finishes */
397 u64 bytes_reserved; /* total bytes the allocator has reserved for
398 current allocations */
Josef Bacik6a632092009-02-20 11:00:09 -0500399 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400400 delalloc/allocations */
Miao Xie26b47ff2014-01-15 20:00:54 +0800401 u64 bytes_readonly; /* total bytes that are read only */
402
Josef Bacik4f4db212015-09-29 11:40:47 -0400403 u64 max_extent_size; /* This will hold the maximum extent size of
404 the space info if we had an ENOSPC in the
405 allocator. */
406
Miao Xie26b47ff2014-01-15 20:00:54 +0800407 unsigned int full:1; /* indicates that we cannot allocate any more
408 chunks for this space */
409 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
410
411 unsigned int flush:1; /* set if we are trying to make space */
412
413 unsigned int force_alloc; /* set if we need to force a chunk
414 alloc for this space */
415
Yan, Zhengb742bb822010-05-16 10:46:24 -0400416 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -0400417 u64 disk_total; /* total bytes on disk, takes mirrors into
418 account */
Josef Bacik6a632092009-02-20 11:00:09 -0500419
Miao Xie26b47ff2014-01-15 20:00:54 +0800420 u64 flags;
421
Chris Mason36e39c42011-03-12 07:08:42 -0500422 /*
Josef Bacikb150a4f2013-06-19 15:00:04 -0400423 * bytes_pinned is kept in line with what is actually pinned, as in
424 * we've called update_block_group and dropped the bytes_used counter
425 * and increased the bytes_pinned counter. However this means that
426 * bytes_pinned does not reflect the bytes that will be pinned once the
Adam Buchbinderbb7ab3b2016-03-04 11:23:12 -0800427 * delayed refs are flushed, so this counter is inc'ed every time we
428 * call btrfs_free_extent so it is a realtime count of what will be
Nicholas D Steeves01327612016-05-19 21:18:45 -0400429 * freed once the transaction is committed. It will be zeroed every
Adam Buchbinderbb7ab3b2016-03-04 11:23:12 -0800430 * time the transaction commits.
Josef Bacikb150a4f2013-06-19 15:00:04 -0400431 */
432 struct percpu_counter total_bytes_pinned;
433
Chris Mason6324fbf2008-03-24 15:01:59 -0400434 struct list_head list;
Filipe Manana75c68e92015-01-16 13:24:40 +0000435 /* Protected by the spinlock 'lock'. */
Josef Bacik633c0aa2014-10-31 09:49:34 -0400436 struct list_head ro_bgs;
Josef Bacik957780e2016-05-17 13:30:55 -0400437 struct list_head priority_tickets;
438 struct list_head tickets;
Wang Xiaoguang939659d2016-11-07 15:59:16 +0800439 /*
440 * tickets_id just indicates the next ticket will be handled, so note
441 * it's not stored per ticket.
442 */
Wang Xiaoguangce129652016-09-02 10:58:46 +0800443 u64 tickets_id;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400444
Miao Xie26b47ff2014-01-15 20:00:54 +0800445 struct rw_semaphore groups_sem;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400446 /* for block groups in our same type */
Yan, Zhengb742bb822010-05-16 10:46:24 -0400447 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacikfdb5eff2011-06-07 16:07:44 -0400448 wait_queue_head_t wait;
Jeff Mahoney6ab0a202013-11-01 13:07:04 -0400449
450 struct kobject kobj;
Jeff Mahoneyc1895442014-05-27 12:59:57 -0400451 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -0400452};
453
Miao Xie66d8f3d2012-09-06 04:02:28 -0600454#define BTRFS_BLOCK_RSV_GLOBAL 1
455#define BTRFS_BLOCK_RSV_DELALLOC 2
456#define BTRFS_BLOCK_RSV_TRANS 3
457#define BTRFS_BLOCK_RSV_CHUNK 4
458#define BTRFS_BLOCK_RSV_DELOPS 5
459#define BTRFS_BLOCK_RSV_EMPTY 6
460#define BTRFS_BLOCK_RSV_TEMP 7
461
Yan, Zhengf0486c62010-05-16 10:46:25 -0400462struct btrfs_block_rsv {
463 u64 size;
464 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400465 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400466 spinlock_t lock;
Miao Xie66d8f3d2012-09-06 04:02:28 -0600467 unsigned short full;
468 unsigned short type;
469 unsigned short failfast;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400470};
471
Chris Masonfa9c0d792009-04-03 09:47:43 -0400472/*
473 * free clusters are used to claim free space in relatively large chunks,
Hans van Kranenburg583b7232017-07-28 08:31:28 +0200474 * allowing us to do less seeky writes. They are used for all metadata
475 * allocations. In ssd_spread mode they are also used for data allocations.
Chris Masonfa9c0d792009-04-03 09:47:43 -0400476 */
477struct btrfs_free_cluster {
478 spinlock_t lock;
479 spinlock_t refill_lock;
480 struct rb_root root;
481
482 /* largest extent in this cluster */
483 u64 max_size;
484
485 /* first extent starting offset */
486 u64 window_start;
487
Josef Bacikc759c4e2015-10-02 15:25:10 -0400488 /* We did a full search and couldn't create a cluster */
489 bool fragmented;
490
Chris Masonfa9c0d792009-04-03 09:47:43 -0400491 struct btrfs_block_group_cache *block_group;
492 /*
493 * when a cluster is allocated from a block group, we put the
494 * cluster onto a list in the block group so that it can
495 * be freed before the block group is freed.
496 */
497 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -0400498};
499
Josef Bacik817d52f2009-07-13 21:29:25 -0400500enum btrfs_caching_type {
501 BTRFS_CACHE_NO = 0,
502 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -0500503 BTRFS_CACHE_FAST = 2,
504 BTRFS_CACHE_FINISHED = 3,
Josef Bacik36cce922013-08-05 11:15:21 -0400505 BTRFS_CACHE_ERROR = 4,
Josef Bacik817d52f2009-07-13 21:29:25 -0400506};
507
Josef Bacik0af3d002010-06-21 14:48:16 -0400508enum btrfs_disk_cache_state {
509 BTRFS_DC_WRITTEN = 0,
510 BTRFS_DC_ERROR = 1,
511 BTRFS_DC_CLEAR = 2,
512 BTRFS_DC_SETUP = 3,
Josef Bacik0af3d002010-06-21 14:48:16 -0400513};
514
Yan Zheng11833d62009-09-11 16:11:19 -0400515struct btrfs_caching_control {
516 struct list_head list;
517 struct mutex mutex;
518 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -0400519 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -0400520 struct btrfs_block_group_cache *block_group;
521 u64 progress;
Elena Reshetova1e4f4712017-03-03 10:55:14 +0200522 refcount_t count;
Yan Zheng11833d62009-09-11 16:11:19 -0400523};
524
Omar Sandoval73fa48b2015-09-29 20:50:33 -0700525/* Once caching_thread() finds this much free space, it will wake up waiters. */
526#define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
527
Chris Mason4c6d1d82015-04-06 13:17:20 -0700528struct btrfs_io_ctl {
529 void *cur, *orig;
530 struct page *page;
531 struct page **pages;
Jeff Mahoneyf15376d2016-06-22 18:56:18 -0400532 struct btrfs_fs_info *fs_info;
Chris Masonc9dc4c62015-04-04 17:14:42 -0700533 struct inode *inode;
Chris Mason4c6d1d82015-04-06 13:17:20 -0700534 unsigned long size;
535 int index;
536 int num_pages;
Chris Masonc9dc4c62015-04-04 17:14:42 -0700537 int entries;
538 int bitmaps;
Chris Mason4c6d1d82015-04-06 13:17:20 -0700539 unsigned check_crcs:1;
540};
541
Qu Wenruo0966a7b2017-04-14 08:35:54 +0800542/*
543 * Tree to record all locked full stripes of a RAID5/6 block group
544 */
545struct btrfs_full_stripe_locks_tree {
546 struct rb_root root;
547 struct mutex lock;
548};
549
Chris Mason9078a3e2007-04-26 16:46:15 -0400550struct btrfs_block_group_cache {
551 struct btrfs_key key;
552 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -0400553 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -0400554 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -0400555 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -0500556 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -0400557 u64 reserved;
Miao Xiee570fd22014-06-19 10:42:50 +0800558 u64 delalloc_bytes;
Josef Bacik1b2da372009-09-11 16:11:20 -0400559 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -0400560 u64 flags;
Josef Bacik5b0e95b2011-10-06 08:58:24 -0400561 u64 cache_generation;
Omar Sandovala5ed9182015-09-29 20:50:35 -0700562
563 /*
564 * If the free space extent count exceeds this number, convert the block
565 * group to bitmaps.
566 */
567 u32 bitmap_high_thresh;
568
569 /*
570 * If the free space extent count drops below this number, convert the
571 * block group back to extents.
572 */
573 u32 bitmap_low_thresh;
David Woodhouse53b381b2013-01-29 18:40:14 -0500574
Miao Xiee570fd22014-06-19 10:42:50 +0800575 /*
576 * It is just used for the delayed data space allocation because
577 * only the data space allocation and the relative metadata update
578 * can be done cross the transaction.
579 */
580 struct rw_semaphore data_rwsem;
581
David Woodhouse53b381b2013-01-29 18:40:14 -0500582 /* for raid56, this is a full stripe, without parity */
583 unsigned long full_stripe_len;
584
Zhaolei868f4012015-08-05 16:43:27 +0800585 unsigned int ro;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +0000586 unsigned int iref:1;
Filipe Manana4f69cb92014-11-26 15:28:51 +0000587 unsigned int has_caching_ctl:1;
Filipe Manana04216822014-11-27 21:14:15 +0000588 unsigned int removed:1;
Josef Bacik0af3d002010-06-21 14:48:16 -0400589
590 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400591
Josef Bacik817d52f2009-07-13 21:29:25 -0400592 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -0400593 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -0400594 struct btrfs_caching_control *caching_ctl;
595 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -0400596
Josef Bacik0f9dd462008-09-23 13:14:11 -0400597 struct btrfs_space_info *space_info;
598
599 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +0800600 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400601
602 /* block group cache stuff */
603 struct rb_node cache_node;
604
605 /* for block groups in the same raid type */
606 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -0500607
608 /* usage count */
609 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -0400610
611 /* List of struct btrfs_free_clusters for this block group.
612 * Today it will only have one thing on it, but that may change
613 */
614 struct list_head cluster_list;
Josef Bacikea658ba2012-09-11 16:57:25 -0400615
Josef Bacik47ab2a62014-09-18 11:20:02 -0400616 /* For delayed block group creation or deletion of empty block groups */
617 struct list_head bg_list;
Josef Bacik633c0aa2014-10-31 09:49:34 -0400618
619 /* For read-only block groups */
620 struct list_head ro_list;
Filipe Manana04216822014-11-27 21:14:15 +0000621
622 atomic_t trimming;
Josef Bacikce93ec52014-11-17 15:45:48 -0500623
624 /* For dirty block groups */
625 struct list_head dirty_list;
Chris Masonc9dc4c62015-04-04 17:14:42 -0700626 struct list_head io_list;
627
628 struct btrfs_io_ctl io_ctl;
Omar Sandovala5ed9182015-09-29 20:50:35 -0700629
Filipe Manana9cfa3e32016-04-26 15:39:32 +0100630 /*
631 * Incremented when doing extent allocations and holding a read lock
632 * on the space_info's groups_sem semaphore.
633 * Decremented when an ordered extent that represents an IO against this
634 * block group's range is created (after it's added to its inode's
635 * root's list of ordered extents) or immediately after the allocation
636 * if it's a metadata extent or fallocate extent (for these cases we
637 * don't create ordered extents).
638 */
639 atomic_t reservations;
640
Filipe Mananaf78c4362016-05-09 13:15:41 +0100641 /*
642 * Incremented while holding the spinlock *lock* by a task checking if
643 * it can perform a nocow write (incremented if the value for the *ro*
644 * field is 0). Decremented by such tasks once they create an ordered
645 * extent or before that if some error happens before reaching that step.
646 * This is to prevent races between block group relocation and nocow
647 * writes through direct IO.
648 */
649 atomic_t nocow_writers;
650
Omar Sandovala5ed9182015-09-29 20:50:35 -0700651 /* Lock for free space tree operations. */
652 struct mutex free_space_lock;
653
654 /*
655 * Does the block group need to be added to the free space tree?
656 * Protected by free_space_lock.
657 */
658 int needs_free_space;
Qu Wenruo0966a7b2017-04-14 08:35:54 +0800659
660 /* Record locked full stripes for RAID5/6 block group */
661 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
Chris Mason9078a3e2007-04-26 16:46:15 -0400662};
Chris Mason0b86a832008-03-24 15:01:56 -0400663
Jan Schmidt097b8a72012-06-21 11:08:04 +0200664/* delayed seq elem */
665struct seq_list {
666 struct list_head list;
667 u64 seq;
668};
669
David Sterba3284da72015-02-25 15:47:32 +0100670#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
671
Edmund Nadolskide47c9d2017-03-16 10:04:34 -0600672#define SEQ_LAST ((u64)-1)
673
Josef Bacik5d803662013-02-07 16:06:02 -0500674enum btrfs_orphan_cleanup_state {
675 ORPHAN_CLEANUP_STARTED = 1,
676 ORPHAN_CLEANUP_DONE = 2,
677};
678
David Woodhouse53b381b2013-01-29 18:40:14 -0500679/* used by the raid56 code to lock stripes for read/modify/write */
680struct btrfs_stripe_hash {
681 struct list_head hash_list;
682 wait_queue_head_t wait;
683 spinlock_t lock;
684};
685
686/* used by the raid56 code to lock stripes for read/modify/write */
687struct btrfs_stripe_hash_table {
Chris Mason4ae10b32013-01-31 14:42:09 -0500688 struct list_head stripe_cache;
689 spinlock_t cache_lock;
690 int cache_size;
691 struct btrfs_stripe_hash table[];
David Woodhouse53b381b2013-01-29 18:40:14 -0500692};
693
694#define BTRFS_STRIPE_HASH_TABLE_BITS 11
695
Miao Xie21c7e752014-05-13 17:29:04 -0700696void btrfs_init_async_reclaim_work(struct work_struct *work);
697
Jan Schmidt097b8a72012-06-21 11:08:04 +0200698/* fs_info */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400699struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -0400700struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400701struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200702struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +0800703struct btrfs_delayed_root;
Josef Bacikafcdd122016-09-02 15:40:02 -0400704
705#define BTRFS_FS_BARRIER 1
706#define BTRFS_FS_CLOSING_START 2
707#define BTRFS_FS_CLOSING_DONE 3
708#define BTRFS_FS_LOG_RECOVERING 4
709#define BTRFS_FS_OPEN 5
710#define BTRFS_FS_QUOTA_ENABLED 6
711#define BTRFS_FS_QUOTA_ENABLING 7
Josef Bacikafcdd122016-09-02 15:40:02 -0400712#define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
713#define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
714#define BTRFS_FS_BTREE_ERR 11
715#define BTRFS_FS_LOG1_ERR 12
716#define BTRFS_FS_LOG2_ERR 13
Sargun Dhillonf29efe22017-05-11 21:17:33 +0000717#define BTRFS_FS_QUOTA_OVERRIDE 14
David Sterbafac03c82017-06-15 19:10:03 +0200718/* Used to record internally whether fs has been frozen */
719#define BTRFS_FS_FROZEN 15
Sargun Dhillonf29efe22017-05-11 21:17:33 +0000720
David Sterba171938e2017-03-28 14:44:21 +0200721/*
722 * Indicate that a whole-filesystem exclusive operation is running
723 * (device replace, resize, device add/delete, balance)
724 */
Tsutomu Itoh69ad5972017-10-04 11:05:17 +0900725#define BTRFS_FS_EXCL_OP 16
Josef Bacikafcdd122016-09-02 15:40:02 -0400726
Chris Mason9f5fae22007-03-20 14:38:32 -0400727struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -0400728 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -0400729 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Josef Bacikafcdd122016-09-02 15:40:02 -0400730 unsigned long flags;
Chris Mason9f5fae22007-03-20 14:38:32 -0400731 struct btrfs_root *extent_root;
732 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -0400733 struct btrfs_root *chunk_root;
734 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -0500735 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -0500736 struct btrfs_root *csum_root;
Arne Jansen416ac512011-09-13 12:56:09 +0200737 struct btrfs_root *quota_root;
Stefan Behrensf7a81ea2013-08-15 17:11:19 +0200738 struct btrfs_root *uuid_root;
Omar Sandovala5ed9182015-09-29 20:50:35 -0700739 struct btrfs_root *free_space_root;
Chris Masone02119d2008-09-05 16:13:11 -0400740
741 /* the log root tree is a directory of all the other log roots */
742 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400743
744 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -0400745 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -0400746
Josef Bacik0f9dd462008-09-23 13:14:11 -0400747 /* block group cache stuff */
748 spinlock_t block_group_cache_lock;
Liu Boa1897fd2012-12-27 09:01:23 +0000749 u64 first_logical_byte;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400750 struct rb_root block_group_cache_tree;
751
Josef Bacik2bf64752011-09-26 17:12:22 -0400752 /* keep track of unallocated space */
Nikolay Borisova5ed45f2017-05-11 09:17:46 +0300753 atomic64_t free_chunk_space;
Josef Bacik2bf64752011-09-26 17:12:22 -0400754
Yan Zheng11833d62009-09-11 16:11:19 -0400755 struct extent_io_tree freed_extents[2];
756 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -0400757
Chris Mason0b86a832008-03-24 15:01:56 -0400758 /* logical->physical extent mapping */
759 struct btrfs_mapping_tree mapping_tree;
760
Miao Xie16cdcec2011-04-22 18:12:22 +0800761 /*
762 * block reservation for extent, checksum, root tree and
763 * delayed dir index item
764 */
Yan, Zhengf0486c62010-05-16 10:46:25 -0400765 struct btrfs_block_rsv global_block_rsv;
766 /* block reservation for delay allocation */
767 struct btrfs_block_rsv delalloc_block_rsv;
768 /* block reservation for metadata operations */
769 struct btrfs_block_rsv trans_block_rsv;
770 /* block reservation for chunk tree */
771 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -0400772 /* block reservation for delayed operations */
773 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400774
775 struct btrfs_block_rsv empty_block_rsv;
776
Chris Mason293ffd52007-03-20 15:57:25 -0400777 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400778 u64 last_trans_committed;
Josef Bacik0a2b2a82014-01-23 10:54:11 -0500779 u64 avg_delayed_ref_runtime;
Chris Mason12fcfd22009-03-24 10:24:20 -0400780
781 /*
782 * this is updated to the current trans every time a full commit
783 * is required instead of the faster short fsync log commits
784 */
785 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +0200786 unsigned long mount_opt;
David Sterba572d9ab2014-02-05 15:26:17 +0100787 /*
788 * Track requests for actions that need to be done during transaction
789 * commit (like for some mount options).
790 */
791 unsigned long pending_changes;
Li Zefan261507a02010-12-17 14:21:50 +0800792 unsigned long compress_type:4;
David Sterba8b87dc12013-08-01 18:14:52 +0200793 int commit_interval;
Miao Xie8c6a3ee2013-01-29 10:05:05 +0000794 /*
795 * It is a suggestive number, the read side is safe even it gets a
796 * wrong number because we will write out the data into a regular
797 * extent. The write side(mount/remount) is under ->s_umount lock,
798 * so it is also safe.
799 */
Chris Mason6f568d32008-01-29 16:03:38 -0500800 u64 max_inline;
David Sterba0d0c71b2017-06-15 01:30:06 +0200801
Chris Mason79154b12007-03-22 15:59:16 -0400802 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400803 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -0400804 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -0400805 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -0500806 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -0400807
Miao Xieceda0862013-04-11 10:30:16 +0000808 /*
809 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
810 * when they are updated.
811 *
812 * Because we do not clear the flags for ever, so we needn't use
813 * the lock on the read side.
814 *
815 * We also needn't use the lock when we mount the fs, because
816 * there is no other task which will update the flag.
817 */
818 spinlock_t super_lock;
David Sterba6c417612011-04-13 15:41:04 +0200819 struct btrfs_super_block *super_copy;
820 struct btrfs_super_block *super_for_commit;
Chris Masone20d96d2007-03-22 12:13:20 -0400821 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -0400822 struct inode *btree_inode;
Chris Masone02119d2008-09-05 16:13:11 -0400823 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -0400824 struct mutex transaction_kthread_mutex;
825 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -0400826 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -0400827 struct mutex volume_mutex;
David Woodhouse53b381b2013-01-29 18:40:14 -0500828
Chris Mason1bbc6212015-04-06 12:46:08 -0700829 /*
830 * this is taken to make sure we don't set block groups ro after
831 * the free space cache has been allocated on them
832 */
833 struct mutex ro_block_group_mutex;
834
David Woodhouse53b381b2013-01-29 18:40:14 -0500835 /* this is used during read/modify/write to make sure
836 * no two ios are trying to mod the same stripe at the same
837 * time
838 */
839 struct btrfs_stripe_hash_table *stripe_hash_table;
840
Chris Mason5a3f23d2009-03-31 13:27:11 -0400841 /*
842 * this protects the ordered operations list only while we are
843 * processing all of the entries on it. This way we make
844 * sure the commit code doesn't find the list temporarily empty
845 * because another function happens to be doing non-waiting preflush
846 * before jumping into the main commit.
847 */
848 struct mutex ordered_operations_mutex;
Josef Bacik9ffba8c2013-08-14 11:33:56 -0400849
Josef Bacik9e351cc2014-03-13 15:42:13 -0400850 struct rw_semaphore commit_root_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400851
Yan, Zhengc71bf092009-11-12 09:34:40 +0000852 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400853
Yan, Zhengc71bf092009-11-12 09:34:40 +0000854 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400855 struct srcu_struct subvol_srcu;
856
Josef Bacika4abeea2011-04-11 17:25:13 -0400857 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -0400858 /*
859 * the reloc mutex goes with the trans lock, it is taken
860 * during commit to protect us from the relocation code
861 */
862 struct mutex reloc_mutex;
863
Chris Mason8fd17792007-04-19 21:01:03 -0400864 struct list_head trans_list;
Chris Masonfacda1e2007-06-08 18:11:48 -0400865 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -0400866 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -0400867
Yan, Zheng24bbcf02009-11-12 09:36:34 +0000868 spinlock_t delayed_iput_lock;
869 struct list_head delayed_iputs;
Filipe Mananac2d6cb12016-01-15 11:05:12 +0000870 struct mutex cleaner_delayed_iput_mutex;
Yan, Zheng24bbcf02009-11-12 09:36:34 +0000871
Jan Schmidtf29021b2012-05-16 17:55:38 +0200872 /* this protects tree_mod_seq_list */
873 spinlock_t tree_mod_seq_lock;
Jan Schmidtfc36ed7e2013-04-24 16:57:33 +0000874 atomic64_t tree_mod_seq;
Jan Schmidtf29021b2012-05-16 17:55:38 +0200875 struct list_head tree_mod_seq_list;
876
877 /* this protects tree_mod_log */
878 rwlock_t tree_mod_log_lock;
879 struct rb_root tree_mod_log;
880
Chris Mason771ed682008-11-06 22:02:51 -0500881 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -0400882 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -0400883
Chris Mason8b712842008-06-11 16:50:36 -0400884 /*
Miao Xie199c2a92013-05-15 07:48:23 +0000885 * this is used to protect the following list -- ordered_roots.
Chris Mason3eaa2882008-07-24 11:57:52 -0400886 */
Miao Xie199c2a92013-05-15 07:48:23 +0000887 spinlock_t ordered_root_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400888
889 /*
Miao Xie199c2a92013-05-15 07:48:23 +0000890 * all fs/file tree roots in which there are data=ordered extents
891 * pending writeback are added into this list.
892 *
Chris Mason5a3f23d2009-03-31 13:27:11 -0400893 * these can span multiple transactions and basically include
894 * every dirty data page that isn't from nodatacow
895 */
Miao Xie199c2a92013-05-15 07:48:23 +0000896 struct list_head ordered_roots;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400897
Miao Xie573bfb72014-03-06 13:55:03 +0800898 struct mutex delalloc_root_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +0000899 spinlock_t delalloc_root_lock;
900 /* all fs/file tree roots that have delalloc inodes. */
901 struct list_head delalloc_roots;
Chris Mason3eaa2882008-07-24 11:57:52 -0400902
903 /*
Chris Mason8b712842008-06-11 16:50:36 -0400904 * there is a pool of worker threads for checksumming during writes
905 * and a pool for checksumming after reads. This is because readers
906 * can run with FS locks held, and the writers may be waiting for
907 * those locks. We don't want ordering in the pending list to cause
908 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -0400909 *
910 * A third pool does submit_bio to avoid deadlocking with the other
911 * two
Chris Mason8b712842008-06-11 16:50:36 -0400912 */
Qu Wenruod458b052014-02-28 10:46:19 +0800913 struct btrfs_workqueue *workers;
914 struct btrfs_workqueue *delalloc_workers;
915 struct btrfs_workqueue *flush_workers;
916 struct btrfs_workqueue *endio_workers;
917 struct btrfs_workqueue *endio_meta_workers;
918 struct btrfs_workqueue *endio_raid56_workers;
Miao Xie8b110e32014-09-12 18:44:03 +0800919 struct btrfs_workqueue *endio_repair_workers;
Qu Wenruod458b052014-02-28 10:46:19 +0800920 struct btrfs_workqueue *rmw_workers;
921 struct btrfs_workqueue *endio_meta_write_workers;
922 struct btrfs_workqueue *endio_write_workers;
923 struct btrfs_workqueue *endio_freespace_worker;
924 struct btrfs_workqueue *submit_workers;
925 struct btrfs_workqueue *caching_workers;
926 struct btrfs_workqueue *readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -0400927
Chris Mason247e7432008-07-17 12:53:51 -0400928 /*
929 * fixup workers take dirty pages that didn't properly go through
930 * the cow mechanism and make them safe to write. It happens
931 * for the sys_munmap function call path
932 */
Qu Wenruod458b052014-02-28 10:46:19 +0800933 struct btrfs_workqueue *fixup_workers;
934 struct btrfs_workqueue *delayed_workers;
Chris Masona79b7d42014-05-22 16:18:52 -0700935
936 /* the extent workers do delayed refs on the extent allocation tree */
937 struct btrfs_workqueue *extent_workers;
Chris Masona74a4b92008-06-25 16:01:31 -0400938 struct task_struct *transaction_kthread;
939 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -0400940 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -0400941
Jeff Mahoney6ab0a202013-11-01 13:07:04 -0400942 struct kobject *space_info_kobj;
Chris Mason62e27492007-03-15 12:56:47 -0400943
Yan324ae4d2007-11-16 14:57:08 -0500944 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -0400945
Miao Xiee2d84522013-01-29 10:09:20 +0000946 /* used to keep from writing metadata until there is a nice batch */
947 struct percpu_counter dirty_metadata_bytes;
Miao Xie963d6782013-01-29 10:10:51 +0000948 struct percpu_counter delalloc_bytes;
Miao Xiee2d84522013-01-29 10:09:20 +0000949 s32 dirty_metadata_batch;
Miao Xie963d6782013-01-29 10:10:51 +0000950 s32 delalloc_batch;
951
Chris Mason0b86a832008-03-24 15:01:56 -0400952 struct list_head dirty_cowonly_roots;
953
Chris Mason8a4b83c2008-03-24 15:02:07 -0400954 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -0400955
956 /*
957 * the space_info list is almost entirely read only. It only changes
958 * when we add a new raid type to the FS, and that happens
959 * very rarely. RCU is used to protect it.
960 */
Chris Mason6324fbf2008-03-24 15:01:59 -0400961 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -0400962
Li Zefanb4d7c3c2012-07-09 20:21:07 -0600963 struct btrfs_space_info *data_sinfo;
964
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400965 struct reloc_control *reloc_ctl;
966
Hans van Kranenburg583b7232017-07-28 08:31:28 +0200967 /* data_alloc_cluster is only used in ssd_spread mode */
Chris Masonfa9c0d792009-04-03 09:47:43 -0400968 struct btrfs_free_cluster data_alloc_cluster;
969
970 /* all metadata allocations go through this cluster */
971 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -0400972
Chris Mason4cb53002011-05-24 15:35:30 -0400973 /* auto defrag inodes go here */
974 spinlock_t defrag_inodes_lock;
975 struct rb_root defrag_inodes;
976 atomic_t defrag_running;
977
Miao Xiede98ced2013-01-29 10:13:12 +0000978 /* Used to protect avail_{data, metadata, system}_alloc_bits */
979 seqlock_t profiles_lock;
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200980 /*
981 * these three are in extended format (availability of single
982 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
983 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
984 */
Chris Masond18a2c42008-04-04 15:40:00 -0400985 u64 avail_data_alloc_bits;
986 u64 avail_metadata_alloc_bits;
987 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -0400988
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200989 /* restriper state */
990 spinlock_t balance_lock;
991 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +0200992 atomic_t balance_running;
993 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +0200994 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200995 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +0200996 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200997
Josef Bacik97e728d2009-04-21 17:40:57 -0400998 unsigned data_chunk_allocations;
999 unsigned metadata_ratio;
1000
Chris Mason788f20e2008-04-28 15:29:42 -04001001 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001002
Arne Jansena2de7332011-03-08 14:14:00 +01001003 /* private scrub information */
1004 struct mutex scrub_lock;
1005 atomic_t scrubs_running;
1006 atomic_t scrub_pause_req;
1007 atomic_t scrubs_paused;
1008 atomic_t scrub_cancel_req;
1009 wait_queue_head_t scrub_pause_wait;
Arne Jansena2de7332011-03-08 14:14:00 +01001010 int scrub_workers_refcnt;
Qu Wenruod458b052014-02-28 10:46:19 +08001011 struct btrfs_workqueue *scrub_workers;
1012 struct btrfs_workqueue *scrub_wr_completion_workers;
1013 struct btrfs_workqueue *scrub_nocow_workers;
Zhao Lei20b2e302015-06-04 20:09:15 +08001014 struct btrfs_workqueue *scrub_parity_workers;
Arne Jansena2de7332011-03-08 14:14:00 +01001015
Stefan Behrens21adbd52011-11-09 13:44:05 +01001016#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1017 u32 check_integrity_print_mask;
1018#endif
Arne Jansen416ac512011-09-13 12:56:09 +02001019 /* is qgroup tracking in a consistent state? */
1020 u64 qgroup_flags;
1021
1022 /* holds configuration and tracking. Protected by qgroup_lock */
1023 struct rb_root qgroup_tree;
Josef Bacikfcebe452014-05-13 17:30:47 -07001024 struct rb_root qgroup_op_tree;
Arne Jansen416ac512011-09-13 12:56:09 +02001025 spinlock_t qgroup_lock;
Josef Bacikfcebe452014-05-13 17:30:47 -07001026 spinlock_t qgroup_op_lock;
1027 atomic_t qgroup_op_seq;
Arne Jansen416ac512011-09-13 12:56:09 +02001028
Wang Shilong1e8f9152013-05-06 11:03:27 +00001029 /*
1030 * used to avoid frequently calling ulist_alloc()/ulist_free()
1031 * when doing qgroup accounting, it must be protected by qgroup_lock.
1032 */
1033 struct ulist *qgroup_ulist;
1034
Wang Shilongf2f6ed32013-04-07 10:50:16 +00001035 /* protect user change for quota operations */
1036 struct mutex qgroup_ioctl_lock;
1037
Arne Jansen416ac512011-09-13 12:56:09 +02001038 /* list of dirty qgroups to be written at next commit */
1039 struct list_head dirty_qgroups;
1040
Qu Wenruoe69bcee2015-04-17 10:23:16 +08001041 /* used by qgroup for an efficient tree traversal */
Arne Jansen416ac512011-09-13 12:56:09 +02001042 u64 qgroup_seq;
Stefan Behrens21adbd52011-11-09 13:44:05 +01001043
Jan Schmidt2f232032013-04-25 16:04:51 +00001044 /* qgroup rescan items */
1045 struct mutex qgroup_rescan_lock; /* protects the progress item */
1046 struct btrfs_key qgroup_rescan_progress;
Qu Wenruod458b052014-02-28 10:46:19 +08001047 struct btrfs_workqueue *qgroup_rescan_workers;
Jan Schmidt57254b6e2013-05-06 19:14:17 +00001048 struct completion qgroup_rescan_completion;
Jan Schmidtb382a322013-05-28 15:47:24 +00001049 struct btrfs_work qgroup_rescan_work;
Jeff Mahoneyd2c609b2016-08-15 12:10:33 -04001050 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
Jan Schmidt2f232032013-04-25 16:04:51 +00001051
liuboacce9522011-01-06 19:30:25 +08001052 /* filesystem state */
Miao Xie87533c42013-01-29 10:14:48 +00001053 unsigned long fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001054
1055 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001056
Arne Jansen90519d62011-05-23 14:30:00 +02001057 /* readahead tree */
1058 spinlock_t reada_lock;
1059 struct radix_tree_root reada_tree;
Chris Mason531f4b1a2011-11-06 03:05:08 -05001060
Zhao Lei2fefd552016-01-07 18:38:48 +08001061 /* readahead works cnt */
1062 atomic_t reada_works_cnt;
1063
Josef Bacikf28491e2013-12-16 13:24:27 -05001064 /* Extent buffer radix tree */
1065 spinlock_t buffer_lock;
1066 struct radix_tree_root buffer_radix;
1067
Chris Masonaf31f5e2011-11-03 15:17:42 -04001068 /* next backup root to be overwritten */
1069 int backup_root_index;
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02001070
Stefan Behrense922e082012-11-05 17:26:40 +01001071 /* device replace state */
1072 struct btrfs_dev_replace dev_replace;
Stefan Behrens5ac00ad2012-11-05 17:54:08 +01001073
Miao Xiec404e0d2014-01-30 16:46:55 +08001074 struct percpu_counter bio_counter;
1075 wait_queue_head_t replace_wait;
1076
Stefan Behrens803b2f52013-08-15 17:11:21 +02001077 struct semaphore uuid_tree_rescan_sem;
Miao Xie21c7e752014-05-13 17:29:04 -07001078
1079 /* Used to reclaim the metadata space in the background. */
1080 struct work_struct async_reclaim_work;
Josef Bacik47ab2a62014-09-18 11:20:02 -04001081
1082 spinlock_t unused_bgs_lock;
1083 struct list_head unused_bgs;
Filipe Mananad4b450c2015-01-29 19:18:25 +00001084 struct mutex unused_bg_unpin_mutex;
Filipe Manana67c5e7d2015-06-11 00:58:53 +01001085 struct mutex delete_unused_bgs_mutex;
Qu Wenruof667aef2014-09-23 13:40:08 +08001086
1087 /* For btrfs to record security options */
1088 struct security_mnt_opts security_opts;
Filipe Manana04216822014-11-27 21:14:15 +00001089
1090 /*
1091 * Chunks that can't be freed yet (under a trim/discard operation)
1092 * and will be latter freed. Protected by fs_info->chunk_mutex.
1093 */
1094 struct list_head pinned_chunks;
Chris Mason511711a2015-12-30 07:52:35 -08001095
Jeff Mahoneyda170662016-06-15 09:22:56 -04001096 /* Cached block sizes */
1097 u32 nodesize;
1098 u32 sectorsize;
1099 u32 stripesize;
Yan324ae4d2007-11-16 14:57:08 -05001100};
Chris Mason0b86a832008-03-24 15:01:56 -04001101
Jeff Mahoneyda170662016-06-15 09:22:56 -04001102static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1103{
1104 return sb->s_fs_info;
1105}
1106
Miao Xie8257b2d2014-03-06 13:38:19 +08001107struct btrfs_subvolume_writers {
1108 struct percpu_counter counter;
1109 wait_queue_head_t wait;
1110};
1111
Chris Mason62e27492007-03-15 12:56:47 -04001112/*
Miao Xie27cdeb72014-04-02 19:51:05 +08001113 * The state of btrfs root
1114 */
1115/*
1116 * btrfs_record_root_in_trans is a multi-step process,
1117 * and it can race with the balancing code. But the
1118 * race is very small, and only the first time the root
1119 * is added to each transaction. So IN_TRANS_SETUP
1120 * is used to tell us when more checks are required
1121 */
1122#define BTRFS_ROOT_IN_TRANS_SETUP 0
1123#define BTRFS_ROOT_REF_COWS 1
1124#define BTRFS_ROOT_TRACK_DIRTY 2
1125#define BTRFS_ROOT_IN_RADIX 3
Jeff Mahoneyf5ee5c92016-06-21 09:52:41 -04001126#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1127#define BTRFS_ROOT_DEFRAG_RUNNING 5
1128#define BTRFS_ROOT_FORCE_COW 6
1129#define BTRFS_ROOT_MULTI_LOG_TASKS 7
1130#define BTRFS_ROOT_DIRTY 8
Miao Xie27cdeb72014-04-02 19:51:05 +08001131
1132/*
Chris Mason62e27492007-03-15 12:56:47 -04001133 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001134 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001135 */
1136struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001137 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001138
Chris Mason5f39d392007-10-15 16:14:19 -04001139 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001140 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001141 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001142
Miao Xie27cdeb72014-04-02 19:51:05 +08001143 unsigned long state;
Chris Mason62e27492007-03-15 12:56:47 -04001144 struct btrfs_root_item root_item;
1145 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001146 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001147 struct extent_io_tree dirty_log_pages;
1148
Chris Masona2135012008-06-25 16:01:30 -04001149 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001150
Yan, Zhengf0486c62010-05-16 10:46:25 -04001151 spinlock_t accounting_lock;
1152 struct btrfs_block_rsv *block_rsv;
1153
Li Zefan581bb052011-04-20 10:06:11 +08001154 /* free ino cache stuff */
Li Zefan581bb052011-04-20 10:06:11 +08001155 struct btrfs_free_space_ctl *free_ino_ctl;
David Sterba57cdc8d2014-02-05 02:37:48 +01001156 enum btrfs_caching_type ino_cache_state;
1157 spinlock_t ino_cache_lock;
1158 wait_queue_head_t ino_cache_wait;
Li Zefan581bb052011-04-20 10:06:11 +08001159 struct btrfs_free_space_ctl *free_ino_pinned;
David Sterba57cdc8d2014-02-05 02:37:48 +01001160 u64 ino_cache_progress;
1161 struct inode *ino_cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001162
Chris Masone02119d2008-09-05 16:13:11 -04001163 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001164 wait_queue_head_t log_writer_wait;
1165 wait_queue_head_t log_commit_wait[2];
Miao Xie8b050d32014-02-20 18:08:58 +08001166 struct list_head log_ctxs[2];
Yan Zheng7237f182009-01-21 12:54:03 -05001167 atomic_t log_writers;
1168 atomic_t log_commit[2];
Miao Xie2ecb7922012-09-06 04:04:27 -06001169 atomic_t log_batch;
Miao Xiebb14a592014-02-20 18:08:56 +08001170 int log_transid;
Miao Xied1433de2014-02-20 18:08:59 +08001171 /* No matter the commit succeeds or not*/
1172 int log_transid_committed;
1173 /* Just be updated when the commit succeeds. */
Miao Xiebb14a592014-02-20 18:08:56 +08001174 int last_log_commit;
Josef Bacikff782e02009-10-08 15:30:04 -04001175 pid_t log_start_pid;
Chris Masonea8c2812008-08-04 23:17:27 -04001176
Chris Mason0f7d52f2007-04-09 10:42:37 -04001177 u64 objectid;
1178 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001179
Chris Mason9f5fae22007-03-20 14:38:32 -04001180 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001181
1182 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001183
David Sterba05653ef2016-07-15 15:23:37 +02001184#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
Chris Mason0d4cf4e2014-10-07 13:24:20 -07001185 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001186 u64 alloc_bytenr;
David Sterba05653ef2016-07-15 15:23:37 +02001187#endif
Josef Bacikfaa2dbf2014-05-07 17:06:09 -04001188
Chris Mason3f157a22008-06-25 16:01:31 -04001189 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001190 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001191 struct btrfs_key defrag_max;
Josef Bacik58176a92007-08-29 15:47:34 -04001192 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001193
1194 /* the dirty list is only used by non-reference counted roots */
1195 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001196
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001197 struct list_head root_list;
1198
Josef Bacik2ab28f32012-10-12 15:27:49 -04001199 spinlock_t log_extents_lock[2];
1200 struct list_head logged_list[2];
1201
Yan, Zhengd68fc572010-05-16 10:49:58 -04001202 spinlock_t orphan_lock;
Josef Bacik8a35d952012-05-23 14:26:42 -04001203 atomic_t orphan_inodes;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001204 struct btrfs_block_rsv *orphan_block_rsv;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001205 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001206
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001207 spinlock_t inode_lock;
1208 /* red-black tree that keeps track of in-memory inodes */
1209 struct rb_root inode_tree;
1210
Chris Mason3394e162008-11-17 20:42:26 -05001211 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001212 * radix tree that keeps track of delayed nodes of every inode,
1213 * protected by inode_lock
1214 */
1215 struct radix_tree_root delayed_nodes_tree;
1216 /*
Chris Mason3394e162008-11-17 20:42:26 -05001217 * right now this just gets used so that a root has its own devid
1218 * for stat. It may be used for more later
1219 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001220 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001221
Anand Jain5f3ab902012-12-07 09:28:54 +00001222 spinlock_t root_item_lock;
Elena Reshetova0700cea2017-03-03 10:55:18 +02001223 refcount_t refs;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001224
Miao Xie573bfb72014-03-06 13:55:03 +08001225 struct mutex delalloc_mutex;
Miao Xieeb73c1b2013-05-15 07:48:22 +00001226 spinlock_t delalloc_lock;
1227 /*
1228 * all of the inodes that have delalloc bytes. It is possible for
1229 * this list to be empty even when there is still dirty data=ordered
1230 * extents waiting to finish IO.
1231 */
1232 struct list_head delalloc_inodes;
1233 struct list_head delalloc_root;
1234 u64 nr_delalloc_inodes;
Miao Xie31f3d252014-03-06 13:55:02 +08001235
1236 struct mutex ordered_extent_mutex;
Miao Xie199c2a92013-05-15 07:48:23 +00001237 /*
1238 * this is used by the balancing code to wait for all the pending
1239 * ordered extents
1240 */
1241 spinlock_t ordered_extent_lock;
1242
1243 /*
1244 * all of the data=ordered extents pending writeback
1245 * these can span multiple transactions and basically include
1246 * every dirty data page that isn't from nodatacow
1247 */
1248 struct list_head ordered_extents;
1249 struct list_head ordered_root;
1250 u64 nr_ordered_extents;
David Sterba2c686532013-12-16 17:34:17 +01001251
1252 /*
1253 * Number of currently running SEND ioctls to prevent
1254 * manipulation with the read-only status via SUBVOL_SETFLAGS
1255 */
1256 int send_in_progress;
Miao Xie8257b2d2014-03-06 13:38:19 +08001257 struct btrfs_subvolume_writers *subv_writers;
David Sterbaea14b57f2017-06-22 02:19:11 +02001258 atomic_t will_be_snapshotted;
Qu Wenruo55eeaf02015-09-08 17:08:38 +08001259
1260 /* For qgroup metadata space reserve */
Goldwyn Rodriguesce0dcee2017-03-14 05:25:09 -05001261 atomic64_t qgroup_meta_rsv;
Chris Mason62e27492007-03-15 12:56:47 -04001262};
Nikolay Borisov118c7012017-05-22 13:16:11 +03001263
Josef Bacik23b5ec72017-07-24 15:14:25 -04001264struct btrfs_file_private {
1265 struct btrfs_trans_handle *trans;
1266 void *filldir_buf;
1267};
1268
Jeff Mahoneyda170662016-06-15 09:22:56 -04001269static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1270{
1271 return btrfs_sb(inode->i_sb)->sectorsize;
1272}
Chris Mason62e27492007-03-15 12:56:47 -04001273
Jeff Mahoneyda170662016-06-15 09:22:56 -04001274static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001275{
Nikolay Borisov118c7012017-05-22 13:16:11 +03001276
1277 return info->nodesize - sizeof(struct btrfs_header);
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001278}
1279
Nikolay Borisov3d9ec8c2017-05-29 09:43:43 +03001280#define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1281
Jeff Mahoneyda170662016-06-15 09:22:56 -04001282static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001283{
Jeff Mahoneyda170662016-06-15 09:22:56 -04001284 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001285}
1286
Jeff Mahoneyda170662016-06-15 09:22:56 -04001287static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001288{
Jeff Mahoneyda170662016-06-15 09:22:56 -04001289 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001290}
1291
1292#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1293 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
Jeff Mahoneyda170662016-06-15 09:22:56 -04001294static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001295{
Jeff Mahoneyda170662016-06-15 09:22:56 -04001296 return BTRFS_MAX_ITEM_SIZE(info) -
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001297 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1298}
1299
Jeff Mahoneyda170662016-06-15 09:22:56 -04001300static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001301{
Jeff Mahoneyda170662016-06-15 09:22:56 -04001302 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
Jeff Mahoney1db1ff92016-06-15 10:33:06 -04001303}
1304
David Sterba0942caa2011-06-28 15:10:37 +00001305/*
1306 * Flags for mount options.
1307 *
1308 * Note: don't forget to add new options to btrfs_show_options()
1309 */
Chris Mason21ad10c2008-01-09 09:23:21 -05001310#define BTRFS_MOUNT_NODATASUM (1 << 0)
1311#define BTRFS_MOUNT_NODATACOW (1 << 1)
1312#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001313#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001314#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001315#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001316#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001317#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001318#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001319#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001320#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05001321#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04001322#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04001323#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04001324#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05001325#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04001326#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04001327#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Qu Wenruo8dcddfa2016-01-19 10:23:02 +08001328#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02001329#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05001330#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1331#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04001332#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Stefan Behrensf420ee12013-08-15 17:11:24 +02001333#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
Josef Bacikd0bd4562015-09-23 14:54:14 -04001334#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1335#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
Chris Masonf7d3d2f2015-12-18 11:11:10 -08001336#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
Qu Wenruo96da0912016-01-19 10:23:03 +08001337#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
Josef Bacikfb592372017-09-29 15:43:48 -04001338#define BTRFS_MOUNT_REF_VERIFY (1 << 28)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001339
David Sterba8b87dc12013-08-01 18:14:52 +02001340#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
David Sterbaf7e98a72015-10-08 14:14:16 +02001341#define BTRFS_DEFAULT_MAX_INLINE (2048)
David Sterba8b87dc12013-08-01 18:14:52 +02001342
Chris Masonb6cda9b2007-12-14 15:30:32 -05001343#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1344#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
Miao Xiedc81cdc2013-02-20 23:32:52 -07001345#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
Jeff Mahoney3cdde222016-06-09 21:38:35 -04001346#define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
Chris Masonb6cda9b2007-12-14 15:30:32 -05001347 BTRFS_MOUNT_##opt)
David Sterba572d9ab2014-02-05 15:26:17 +01001348
Jeff Mahoney3cdde222016-06-09 21:38:35 -04001349#define btrfs_set_and_info(fs_info, opt, fmt, args...) \
Wang Shilong9d89ce62014-04-23 19:33:33 +08001350{ \
Jeff Mahoney3cdde222016-06-09 21:38:35 -04001351 if (!btrfs_test_opt(fs_info, opt)) \
1352 btrfs_info(fs_info, fmt, ##args); \
1353 btrfs_set_opt(fs_info->mount_opt, opt); \
Wang Shilong9d89ce62014-04-23 19:33:33 +08001354}
1355
Jeff Mahoney3cdde222016-06-09 21:38:35 -04001356#define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
Wang Shilong9d89ce62014-04-23 19:33:33 +08001357{ \
Jeff Mahoney3cdde222016-06-09 21:38:35 -04001358 if (btrfs_test_opt(fs_info, opt)) \
1359 btrfs_info(fs_info, fmt, ##args); \
1360 btrfs_clear_opt(fs_info->mount_opt, opt); \
Wang Shilong9d89ce62014-04-23 19:33:33 +08001361}
1362
Josef Bacikd0bd4562015-09-23 14:54:14 -04001363#ifdef CONFIG_BTRFS_DEBUG
1364static inline int
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04001365btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
Josef Bacikd0bd4562015-09-23 14:54:14 -04001366{
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04001367 struct btrfs_fs_info *fs_info = block_group->fs_info;
Jeff Mahoney0b246af2016-06-22 18:54:23 -04001368
1369 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
Josef Bacikd0bd4562015-09-23 14:54:14 -04001370 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
Jeff Mahoney0b246af2016-06-22 18:54:23 -04001371 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
Josef Bacikd0bd4562015-09-23 14:54:14 -04001372 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1373}
1374#endif
1375
Yanb98b6762008-01-08 15:54:37 -05001376/*
David Sterba572d9ab2014-02-05 15:26:17 +01001377 * Requests for changes that need to be done during transaction commit.
1378 *
1379 * Internal mount options that are used for special handling of the real
1380 * mount options (eg. cannot be set during remount and have to be set during
1381 * transaction commit)
1382 */
1383
David Sterba7e1876a2014-02-05 15:26:17 +01001384#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1385#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
David Sterbad51033d2014-11-12 14:24:35 +01001386#define BTRFS_PENDING_COMMIT (2)
David Sterba7e1876a2014-02-05 15:26:17 +01001387
David Sterba572d9ab2014-02-05 15:26:17 +01001388#define btrfs_test_pending(info, opt) \
1389 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1390#define btrfs_set_pending(info, opt) \
1391 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1392#define btrfs_clear_pending(info, opt) \
1393 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1394
1395/*
1396 * Helpers for setting pending mount option changes.
1397 *
1398 * Expects corresponding macros
1399 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1400 */
1401#define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1402do { \
1403 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1404 btrfs_info((info), fmt, ##args); \
1405 btrfs_set_pending((info), SET_##opt); \
1406 btrfs_clear_pending((info), CLEAR_##opt); \
1407 } \
1408} while(0)
1409
1410#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1411do { \
1412 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1413 btrfs_info((info), fmt, ##args); \
1414 btrfs_set_pending((info), CLEAR_##opt); \
1415 btrfs_clear_pending((info), SET_##opt); \
1416 } \
1417} while(0)
1418
1419/*
Yanb98b6762008-01-08 15:54:37 -05001420 * Inode flags
1421 */
Yanfdebe2b2008-01-14 13:26:08 -05001422#define BTRFS_INODE_NODATASUM (1 << 0)
1423#define BTRFS_INODE_NODATACOW (1 << 1)
1424#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001425#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001426#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001427#define BTRFS_INODE_SYNC (1 << 5)
1428#define BTRFS_INODE_IMMUTABLE (1 << 6)
1429#define BTRFS_INODE_APPEND (1 << 7)
1430#define BTRFS_INODE_NODUMP (1 << 8)
1431#define BTRFS_INODE_NOATIME (1 << 9)
1432#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00001433#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001434
Li Zefan08fe4db2011-03-28 02:01:25 +00001435#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1436
Chris Masoncfed81a2012-03-03 07:40:03 -05001437struct btrfs_map_token {
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001438 const struct extent_buffer *eb;
Chris Masoncfed81a2012-03-03 07:40:03 -05001439 char *kaddr;
1440 unsigned long offset;
1441};
1442
Chandan Rajendra2e78c922016-01-21 15:55:53 +05301443#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1444 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1445
Chris Masoncfed81a2012-03-03 07:40:03 -05001446static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1447{
Josef Bacikad914552012-10-15 13:39:33 -04001448 token->kaddr = NULL;
Chris Masoncfed81a2012-03-03 07:40:03 -05001449}
1450
Nicholas D Steeves01327612016-05-19 21:18:45 -04001451/* some macros to generate set/get functions for the struct fields. This
Chris Mason5f39d392007-10-15 16:14:19 -04001452 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1453 * one for u8:
1454 */
1455#define le8_to_cpu(v) (v)
1456#define cpu_to_le8(v) (v)
1457#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001458
Jeff Mahoney62e85572016-09-20 10:05:01 -04001459#define read_eb_member(eb, ptr, type, member, result) (\
Chris Mason5f39d392007-10-15 16:14:19 -04001460 read_extent_buffer(eb, (char *)(result), \
1461 ((unsigned long)(ptr)) + \
1462 offsetof(type, member), \
1463 sizeof(((type *)0)->member)))
1464
Jeff Mahoney62e85572016-09-20 10:05:01 -04001465#define write_eb_member(eb, ptr, type, member, result) (\
Chris Mason5f39d392007-10-15 16:14:19 -04001466 write_extent_buffer(eb, (char *)(result), \
1467 ((unsigned long)(ptr)) + \
1468 offsetof(type, member), \
1469 sizeof(((type *)0)->member)))
1470
Li Zefan18077bb2012-07-09 20:22:35 -06001471#define DECLARE_BTRFS_SETGET_BITS(bits) \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001472u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1473 const void *ptr, unsigned long off, \
1474 struct btrfs_map_token *token); \
1475void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
Li Zefan18077bb2012-07-09 20:22:35 -06001476 unsigned long off, u##bits val, \
1477 struct btrfs_map_token *token); \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001478static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1479 const void *ptr, \
Li Zefan18077bb2012-07-09 20:22:35 -06001480 unsigned long off) \
1481{ \
1482 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1483} \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001484static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
Li Zefan18077bb2012-07-09 20:22:35 -06001485 unsigned long off, u##bits val) \
1486{ \
1487 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1488}
1489
1490DECLARE_BTRFS_SETGET_BITS(8)
1491DECLARE_BTRFS_SETGET_BITS(16)
1492DECLARE_BTRFS_SETGET_BITS(32)
1493DECLARE_BTRFS_SETGET_BITS(64)
1494
Chris Mason5f39d392007-10-15 16:14:19 -04001495#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001496static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1497 const type *s) \
Li Zefan18077bb2012-07-09 20:22:35 -06001498{ \
1499 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1500 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1501} \
1502static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1503 u##bits val) \
1504{ \
1505 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1506 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1507} \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001508static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1509 const type *s, \
Li Zefan18077bb2012-07-09 20:22:35 -06001510 struct btrfs_map_token *token) \
1511{ \
1512 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1513 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1514} \
1515static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1516 type *s, u##bits val, \
1517 struct btrfs_map_token *token) \
1518{ \
1519 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1520 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1521}
Chris Mason9078a3e2007-04-26 16:46:15 -04001522
Chris Mason5f39d392007-10-15 16:14:19 -04001523#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001524static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
Chris Mason5f39d392007-10-15 16:14:19 -04001525{ \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001526 const type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001527 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04001528 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001529} \
1530static inline void btrfs_set_##name(struct extent_buffer *eb, \
1531 u##bits val) \
1532{ \
Chris Mason727011e2010-08-06 13:21:20 -04001533 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001534 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001535}
Chris Mason1e1d2702007-03-15 19:03:33 -04001536
Chris Mason5f39d392007-10-15 16:14:19 -04001537#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001538static inline u##bits btrfs_##name(const type *s) \
Chris Mason5f39d392007-10-15 16:14:19 -04001539{ \
1540 return le##bits##_to_cpu(s->member); \
1541} \
1542static inline void btrfs_set_##name(type *s, u##bits val) \
1543{ \
1544 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001545}
1546
Nikolay Borisoveca152e2017-06-16 14:39:19 +03001547
1548static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1549 struct btrfs_dev_item *s)
1550{
1551 BUILD_BUG_ON(sizeof(u64) !=
1552 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1553 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1554 total_bytes));
1555}
1556static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1557 struct btrfs_dev_item *s,
1558 u64 val)
1559{
1560 BUILD_BUG_ON(sizeof(u64) !=
1561 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
Nikolay Borisov7dfb8be2017-06-16 14:39:20 +03001562 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
Nikolay Borisoveca152e2017-06-16 14:39:19 +03001563 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1564}
1565
1566
Chris Mason0b86a832008-03-24 15:01:56 -04001567BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001568BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1569BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1570BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001571BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1572 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001573BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1574BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001575BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1576BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1577BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001578BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001579
Chris Mason8a4b83c2008-03-24 15:02:07 -04001580BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1581BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1582 total_bytes, 64);
1583BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1584 bytes_used, 64);
1585BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1586 io_align, 32);
1587BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1588 io_width, 32);
1589BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1590 sector_size, 32);
1591BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001592BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1593 dev_group, 32);
1594BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1595 seek_speed, 8);
1596BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1597 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001598BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1599 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001600
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02001601static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
Chris Mason0b86a832008-03-24 15:01:56 -04001602{
Geert Uytterhoeven410ba3a2013-08-20 13:20:11 +02001603 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
Chris Mason0b86a832008-03-24 15:01:56 -04001604}
1605
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02001606static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
Yan Zheng2b820322008-11-17 21:11:30 -05001607{
Geert Uytterhoeven1473b242013-08-20 13:20:12 +02001608 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
Yan Zheng2b820322008-11-17 21:11:30 -05001609}
1610
Chris Masone17cade2008-04-15 15:41:47 -04001611BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001612BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1613BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1614BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1615BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1616BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1617BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1618BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001619BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001620BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1621BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1622
Chris Masone17cade2008-04-15 15:41:47 -04001623static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1624{
1625 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1626}
1627
1628BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001629BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1630BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1631 stripe_len, 64);
1632BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1633 io_align, 32);
1634BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1635 io_width, 32);
1636BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1637 sector_size, 32);
1638BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1639BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1640 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001641BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1642 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001643BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1644BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1645
1646static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1647 int nr)
1648{
1649 unsigned long offset = (unsigned long)c;
1650 offset += offsetof(struct btrfs_chunk, stripe);
1651 offset += nr * sizeof(struct btrfs_stripe);
1652 return (struct btrfs_stripe *)offset;
1653}
1654
Chris Masona4437552008-04-18 10:29:38 -04001655static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1656{
1657 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1658}
1659
Chris Mason0b86a832008-03-24 15:01:56 -04001660static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1661 struct btrfs_chunk *c, int nr)
1662{
1663 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1664}
1665
Chris Mason0b86a832008-03-24 15:01:56 -04001666static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1667 struct btrfs_chunk *c, int nr)
1668{
1669 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1670}
1671
Chris Mason5f39d392007-10-15 16:14:19 -04001672/* struct btrfs_block_group_item */
1673BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1674 used, 64);
1675BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1676 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001677BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1678 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001679
1680BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001681 struct btrfs_block_group_item, chunk_objectid, 64);
1682BTRFS_SETGET_FUNCS(disk_block_group_flags,
1683 struct btrfs_block_group_item, flags, 64);
1684BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1685 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001686
Omar Sandoval208acb82015-09-29 20:50:34 -07001687/* struct btrfs_free_space_info */
1688BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1689 extent_count, 32);
1690BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1691
Chris Mason39544012007-12-12 14:38:19 -05001692/* struct btrfs_inode_ref */
1693BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001694BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001695
Mark Fashehf1863732012-08-08 11:32:27 -07001696/* struct btrfs_inode_extref */
1697BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1698 parent_objectid, 64);
1699BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1700 name_len, 16);
1701BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1702
Chris Mason5f39d392007-10-15 16:14:19 -04001703/* struct btrfs_inode_item */
1704BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001705BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001706BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001707BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001708BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001709BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1710BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1711BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1712BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1713BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04001714BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001715BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08001716BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1717 generation, 64);
1718BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1719 sequence, 64);
1720BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1721 transid, 64);
1722BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1723BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1724 nbytes, 64);
1725BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1726 block_group, 64);
1727BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1728BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1729BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1730BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1731BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1732BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001733BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1734BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08001735BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1736BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001737
Chris Mason0b86a832008-03-24 15:01:56 -04001738/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04001739BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1740 chunk_tree, 64);
1741BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1742 chunk_objectid, 64);
1743BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1744 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001745BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1746
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02001747static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
Chris Masone17cade2008-04-15 15:41:47 -04001748{
1749 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
Geert Uytterhoeven231e88f2013-08-20 13:20:13 +02001750 return (unsigned long)dev + ptr;
Chris Masone17cade2008-04-15 15:41:47 -04001751}
1752
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001753BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1754BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1755 generation, 64);
1756BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001757
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001758BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001759
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001760
1761BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1762
1763static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1764 struct btrfs_tree_block_info *item,
1765 struct btrfs_disk_key *key)
1766{
1767 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1768}
1769
1770static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1771 struct btrfs_tree_block_info *item,
1772 struct btrfs_disk_key *key)
1773{
1774 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1775}
1776
1777BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1778 root, 64);
1779BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1780 objectid, 64);
1781BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1782 offset, 64);
1783BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1784 count, 32);
1785
1786BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1787 count, 32);
1788
1789BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1790 type, 8);
1791BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1792 offset, 64);
1793
1794static inline u32 btrfs_extent_inline_ref_size(int type)
1795{
1796 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1797 type == BTRFS_SHARED_BLOCK_REF_KEY)
1798 return sizeof(struct btrfs_extent_inline_ref);
1799 if (type == BTRFS_SHARED_DATA_REF_KEY)
1800 return sizeof(struct btrfs_shared_data_ref) +
1801 sizeof(struct btrfs_extent_inline_ref);
1802 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1803 return sizeof(struct btrfs_extent_data_ref) +
1804 offsetof(struct btrfs_extent_inline_ref, offset);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001805 return 0;
1806}
1807
1808BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1809BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1810 generation, 64);
1811BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1812BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001813
1814/* struct btrfs_node */
1815BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001816BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08001817BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1818 blockptr, 64);
1819BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1820 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001821
1822static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001823{
Chris Mason5f39d392007-10-15 16:14:19 -04001824 unsigned long ptr;
1825 ptr = offsetof(struct btrfs_node, ptrs) +
1826 sizeof(struct btrfs_key_ptr) * nr;
1827 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001828}
1829
Chris Mason5f39d392007-10-15 16:14:19 -04001830static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1831 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04001832{
Chris Mason5f39d392007-10-15 16:14:19 -04001833 unsigned long ptr;
1834 ptr = offsetof(struct btrfs_node, ptrs) +
1835 sizeof(struct btrfs_key_ptr) * nr;
1836 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04001837}
1838
Chris Mason74493f72007-12-11 09:25:06 -05001839static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1840{
1841 unsigned long ptr;
1842 ptr = offsetof(struct btrfs_node, ptrs) +
1843 sizeof(struct btrfs_key_ptr) * nr;
1844 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1845}
1846
1847static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1848 int nr, u64 val)
1849{
1850 unsigned long ptr;
1851 ptr = offsetof(struct btrfs_node, ptrs) +
1852 sizeof(struct btrfs_key_ptr) * nr;
1853 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1854}
1855
Chris Mason810191f2007-10-15 16:18:55 -04001856static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04001857{
Chris Mason5f39d392007-10-15 16:14:19 -04001858 return offsetof(struct btrfs_node, ptrs) +
1859 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04001860}
1861
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001862void btrfs_node_key(const struct extent_buffer *eb,
Chris Masone644d022007-11-06 15:09:29 -05001863 struct btrfs_disk_key *disk_key, int nr);
1864
Chris Mason5f39d392007-10-15 16:14:19 -04001865static inline void btrfs_set_node_key(struct extent_buffer *eb,
1866 struct btrfs_disk_key *disk_key, int nr)
1867{
1868 unsigned long ptr;
1869 ptr = btrfs_node_key_ptr_offset(nr);
1870 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1871 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001872}
1873
Chris Mason5f39d392007-10-15 16:14:19 -04001874/* struct btrfs_item */
1875BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1876BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
Qu Wenruo3cae2102013-07-16 11:19:18 +08001877BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1878BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001879
1880static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001881{
Chris Mason5f39d392007-10-15 16:14:19 -04001882 return offsetof(struct btrfs_leaf, items) +
1883 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001884}
1885
Ross Kirkdd3cc162013-09-16 15:58:09 +01001886static inline struct btrfs_item *btrfs_item_nr(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001887{
Chris Mason5f39d392007-10-15 16:14:19 -04001888 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001889}
1890
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001891static inline u32 btrfs_item_end(const struct extent_buffer *eb,
Chris Mason5f39d392007-10-15 16:14:19 -04001892 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001893{
Chris Mason5f39d392007-10-15 16:14:19 -04001894 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04001895}
1896
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001897static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001898{
Ross Kirkdd3cc162013-09-16 15:58:09 +01001899 return btrfs_item_end(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001900}
1901
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001902static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001903{
Ross Kirkdd3cc162013-09-16 15:58:09 +01001904 return btrfs_item_offset(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001905}
1906
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001907static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001908{
Ross Kirkdd3cc162013-09-16 15:58:09 +01001909 return btrfs_item_size(eb, btrfs_item_nr(nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001910}
1911
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001912static inline void btrfs_item_key(const struct extent_buffer *eb,
Chris Mason5f39d392007-10-15 16:14:19 -04001913 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001914{
Ross Kirkdd3cc162013-09-16 15:58:09 +01001915 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04001916 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001917}
1918
Chris Mason5f39d392007-10-15 16:14:19 -04001919static inline void btrfs_set_item_key(struct extent_buffer *eb,
1920 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001921{
Ross Kirkdd3cc162013-09-16 15:58:09 +01001922 struct btrfs_item *item = btrfs_item_nr(nr);
Chris Mason5f39d392007-10-15 16:14:19 -04001923 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001924}
1925
Chris Masone02119d2008-09-05 16:13:11 -04001926BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1927
Chris Mason0660b5a2008-11-17 20:37:39 -05001928/*
1929 * struct btrfs_root_ref
1930 */
1931BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1932BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1933BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1934
Chris Mason5f39d392007-10-15 16:14:19 -04001935/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05001936BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04001937BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1938BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04001939BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08001940BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1941BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1942 data_len, 16);
1943BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1944 name_len, 16);
1945BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1946 transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001947
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001948static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1949 const struct btrfs_dir_item *item,
Chris Mason5f39d392007-10-15 16:14:19 -04001950 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001951{
Chris Mason5f39d392007-10-15 16:14:19 -04001952 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001953}
1954
Chris Mason5f39d392007-10-15 16:14:19 -04001955static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1956 struct btrfs_dir_item *item,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001957 const struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001958{
Chris Mason5f39d392007-10-15 16:14:19 -04001959 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001960}
1961
Josef Bacik0af3d002010-06-21 14:48:16 -04001962BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1963 num_entries, 64);
1964BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1965 num_bitmaps, 64);
1966BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1967 generation, 64);
1968
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001969static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1970 const struct btrfs_free_space_header *h,
Josef Bacik0af3d002010-06-21 14:48:16 -04001971 struct btrfs_disk_key *key)
1972{
1973 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1974}
1975
1976static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1977 struct btrfs_free_space_header *h,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06001978 const struct btrfs_disk_key *key)
Josef Bacik0af3d002010-06-21 14:48:16 -04001979{
1980 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1981}
1982
Chris Mason5f39d392007-10-15 16:14:19 -04001983/* struct btrfs_disk_key */
1984BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1985 objectid, 64);
1986BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1987BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04001988
Chris Masone2fa7222007-03-12 16:22:34 -04001989static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
Omar Sandoval310712b2017-01-17 23:24:37 -08001990 const struct btrfs_disk_key *disk)
Chris Masone2fa7222007-03-12 16:22:34 -04001991{
1992 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001993 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001994 cpu->objectid = le64_to_cpu(disk->objectid);
1995}
1996
1997static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
Omar Sandoval310712b2017-01-17 23:24:37 -08001998 const struct btrfs_key *cpu)
Chris Masone2fa7222007-03-12 16:22:34 -04001999{
2000 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002001 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002002 disk->objectid = cpu_to_le64(cpu->objectid);
2003}
2004
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002005static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2006 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002007{
Chris Mason5f39d392007-10-15 16:14:19 -04002008 struct btrfs_disk_key disk_key;
2009 btrfs_node_key(eb, &disk_key, nr);
2010 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002011}
2012
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002013static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2014 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002015{
Chris Mason5f39d392007-10-15 16:14:19 -04002016 struct btrfs_disk_key disk_key;
2017 btrfs_item_key(eb, &disk_key, nr);
2018 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002019}
2020
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002021static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2022 const struct btrfs_dir_item *item,
2023 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002024{
Chris Mason5f39d392007-10-15 16:14:19 -04002025 struct btrfs_disk_key disk_key;
2026 btrfs_dir_item_key(eb, item, &disk_key);
2027 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002028}
2029
Omar Sandoval310712b2017-01-17 23:24:37 -08002030static inline u8 btrfs_key_type(const struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002031{
Chris Mason5f39d392007-10-15 16:14:19 -04002032 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002033}
2034
Chris Mason5f39d392007-10-15 16:14:19 -04002035static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002036{
Chris Mason5f39d392007-10-15 16:14:19 -04002037 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002038}
2039
Chris Mason5f39d392007-10-15 16:14:19 -04002040/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002041BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002042BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2043 generation, 64);
2044BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2045BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002046BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002047BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002048BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2049 generation, 64);
2050BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2051BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2052 nritems, 32);
2053BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002054
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002055static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
Chris Mason63b10fc2008-04-01 11:21:32 -04002056{
2057 return (btrfs_header_flags(eb) & flag) == flag;
2058}
2059
2060static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2061{
2062 u64 flags = btrfs_header_flags(eb);
2063 btrfs_set_header_flags(eb, flags | flag);
2064 return (flags & flag) == flag;
2065}
2066
2067static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2068{
2069 u64 flags = btrfs_header_flags(eb);
2070 btrfs_set_header_flags(eb, flags & ~flag);
2071 return (flags & flag) == flag;
2072}
2073
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002074static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002075{
2076 u64 flags = btrfs_header_flags(eb);
2077 return flags >> BTRFS_BACKREF_REV_SHIFT;
2078}
2079
2080static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2081 int rev)
2082{
2083 u64 flags = btrfs_header_flags(eb);
2084 flags &= ~BTRFS_BACKREF_REV_MASK;
2085 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2086 btrfs_set_header_flags(eb, flags);
2087}
2088
Ross Kirk0a4e5582013-09-24 10:12:38 +01002089static inline unsigned long btrfs_header_fsid(void)
Chris Masone2fa7222007-03-12 16:22:34 -04002090{
Geert Uytterhoevenfba6aa72013-08-20 13:20:14 +02002091 return offsetof(struct btrfs_header, fsid);
Chris Masone2fa7222007-03-12 16:22:34 -04002092}
2093
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002094static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
Chris Masone17cade2008-04-15 15:41:47 -04002095{
Geert Uytterhoevenb308bc22013-08-20 13:20:15 +02002096 return offsetof(struct btrfs_header, chunk_tree_uuid);
Chris Masone17cade2008-04-15 15:41:47 -04002097}
2098
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002099static inline int btrfs_is_leaf(const struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002100{
Chris Masond3977122009-01-05 21:25:51 -05002101 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002102}
2103
Chris Mason5f39d392007-10-15 16:14:19 -04002104/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002105BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2106 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002107BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002108BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2109BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002110
Yan Zheng84234f32008-10-29 14:49:05 -04002111BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2112 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002113BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2114BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002115BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2116BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002117BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002118BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2119BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002120BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2121 last_snapshot, 64);
Alexander Block8ea05e32012-07-25 17:35:53 +02002122BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2123 generation_v2, 64);
2124BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2125 ctransid, 64);
2126BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2127 otransid, 64);
2128BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2129 stransid, 64);
2130BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2131 rtransid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002132
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002133static inline bool btrfs_root_readonly(const struct btrfs_root *root)
Li Zefanb83cc962010-12-20 16:04:08 +08002134{
Al Viro6ed3cf2c2012-04-13 11:49:04 -04002135 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002136}
2137
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002138static inline bool btrfs_root_dead(const struct btrfs_root *root)
David Sterba521e0542014-04-15 16:41:44 +02002139{
2140 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2141}
2142
Chris Masonaf31f5e2011-11-03 15:17:42 -04002143/* struct btrfs_root_backup */
2144BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2145 tree_root, 64);
2146BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2147 tree_root_gen, 64);
2148BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2149 tree_root_level, 8);
2150
2151BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2152 chunk_root, 64);
2153BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2154 chunk_root_gen, 64);
2155BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2156 chunk_root_level, 8);
2157
2158BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2159 extent_root, 64);
2160BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2161 extent_root_gen, 64);
2162BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2163 extent_root_level, 8);
2164
2165BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2166 fs_root, 64);
2167BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2168 fs_root_gen, 64);
2169BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2170 fs_root_level, 8);
2171
2172BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2173 dev_root, 64);
2174BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2175 dev_root_gen, 64);
2176BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2177 dev_root_level, 8);
2178
2179BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2180 csum_root, 64);
2181BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2182 csum_root_gen, 64);
2183BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2184 csum_root_level, 8);
2185BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2186 total_bytes, 64);
2187BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2188 bytes_used, 64);
2189BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2190 num_devices, 64);
2191
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002192/* struct btrfs_balance_item */
2193BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002194
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002195static inline void btrfs_balance_data(const struct extent_buffer *eb,
2196 const struct btrfs_balance_item *bi,
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002197 struct btrfs_disk_balance_args *ba)
2198{
2199 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2200}
2201
2202static inline void btrfs_set_balance_data(struct extent_buffer *eb,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002203 struct btrfs_balance_item *bi,
2204 const struct btrfs_disk_balance_args *ba)
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002205{
2206 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2207}
2208
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002209static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2210 const struct btrfs_balance_item *bi,
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002211 struct btrfs_disk_balance_args *ba)
2212{
2213 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2214}
2215
2216static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002217 struct btrfs_balance_item *bi,
2218 const struct btrfs_disk_balance_args *ba)
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002219{
2220 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2221}
2222
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002223static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2224 const struct btrfs_balance_item *bi,
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002225 struct btrfs_disk_balance_args *ba)
2226{
2227 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2228}
2229
2230static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002231 struct btrfs_balance_item *bi,
2232 const struct btrfs_disk_balance_args *ba)
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002233{
2234 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2235}
2236
2237static inline void
2238btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002239 const struct btrfs_disk_balance_args *disk)
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002240{
2241 memset(cpu, 0, sizeof(*cpu));
2242
2243 cpu->profiles = le64_to_cpu(disk->profiles);
2244 cpu->usage = le64_to_cpu(disk->usage);
2245 cpu->devid = le64_to_cpu(disk->devid);
2246 cpu->pstart = le64_to_cpu(disk->pstart);
2247 cpu->pend = le64_to_cpu(disk->pend);
2248 cpu->vstart = le64_to_cpu(disk->vstart);
2249 cpu->vend = le64_to_cpu(disk->vend);
2250 cpu->target = le64_to_cpu(disk->target);
2251 cpu->flags = le64_to_cpu(disk->flags);
David Sterba7d824b62014-05-07 17:37:51 +02002252 cpu->limit = le64_to_cpu(disk->limit);
David Sterbaed0df612016-11-01 14:21:23 +01002253 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2254 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002255}
2256
2257static inline void
2258btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002259 const struct btrfs_balance_args *cpu)
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002260{
2261 memset(disk, 0, sizeof(*disk));
2262
2263 disk->profiles = cpu_to_le64(cpu->profiles);
2264 disk->usage = cpu_to_le64(cpu->usage);
2265 disk->devid = cpu_to_le64(cpu->devid);
2266 disk->pstart = cpu_to_le64(cpu->pstart);
2267 disk->pend = cpu_to_le64(cpu->pend);
2268 disk->vstart = cpu_to_le64(cpu->vstart);
2269 disk->vend = cpu_to_le64(cpu->vend);
2270 disk->target = cpu_to_le64(cpu->target);
2271 disk->flags = cpu_to_le64(cpu->flags);
David Sterba7d824b62014-05-07 17:37:51 +02002272 disk->limit = cpu_to_le64(cpu->limit);
David Sterbaed0df612016-11-01 14:21:23 +01002273 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2274 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002275}
2276
2277/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04002278BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04002279BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002280BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2281 generation, 64);
2282BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002283BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2284 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04002285BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2286 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002287BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2288 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04002289BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2290 chunk_root, 64);
2291BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04002292 chunk_root_level, 8);
2293BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2294 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002295BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2296 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002297BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2298 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04002299BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2300 total_bytes, 64);
2301BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2302 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002303BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2304 sectorsize, 32);
2305BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2306 nodesize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05002307BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2308 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002309BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2310 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002311BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2312 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002313BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2314 compat_flags, 64);
2315BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00002316 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002317BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2318 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002319BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2320 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04002321BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2322 cache_generation, 64);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002323BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
Stefan Behrens26432792013-08-15 17:11:22 +02002324BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2325 uuid_tree_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002326
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002327static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
Josef Bacik607d4322008-12-02 07:17:45 -05002328{
David Sterba1104a882013-03-06 15:57:46 +01002329 u16 t = btrfs_super_csum_type(s);
2330 /*
2331 * csum type is validated at mount time
2332 */
Josef Bacik607d4322008-12-02 07:17:45 -05002333 return btrfs_csum_sizes[t];
2334}
Chris Mason5f39d392007-10-15 16:14:19 -04002335
Chris Mason7f5c1512007-03-23 15:56:19 -04002336
Liu Bo851cd172016-09-23 13:44:44 -07002337/*
2338 * The leaf data grows from end-to-front in the node.
2339 * this returns the address of the start of the last item,
2340 * which is the stop of the leaf data stack
2341 */
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002342static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2343 const struct extent_buffer *leaf)
Liu Bo851cd172016-09-23 13:44:44 -07002344{
2345 u32 nr = btrfs_header_nritems(leaf);
2346
2347 if (nr == 0)
Jeff Mahoney0b246af2016-06-22 18:54:23 -04002348 return BTRFS_LEAF_DATA_SIZE(fs_info);
Liu Bo851cd172016-09-23 13:44:44 -07002349 return btrfs_item_offset_nr(leaf, nr - 1);
2350}
2351
Chris Mason5f39d392007-10-15 16:14:19 -04002352/* struct btrfs_file_extent_item */
2353BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Qu Wenruo3cae2102013-07-16 11:19:18 +08002354BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2355 struct btrfs_file_extent_item, disk_bytenr, 64);
2356BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2357 struct btrfs_file_extent_item, offset, 64);
2358BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2359 struct btrfs_file_extent_item, generation, 64);
2360BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2361 struct btrfs_file_extent_item, num_bytes, 64);
Josef Bacike20d6c52013-11-13 21:11:49 -05002362BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2363 struct btrfs_file_extent_item, disk_num_bytes, 64);
2364BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2365 struct btrfs_file_extent_item, compression, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04002366
Chris Masond3977122009-01-05 21:25:51 -05002367static inline unsigned long
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002368btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
Chris Mason236454d2007-04-19 13:37:44 -04002369{
David Sterba7ec20af2014-07-24 17:34:58 +02002370 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Mason236454d2007-04-19 13:37:44 -04002371}
2372
2373static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2374{
David Sterba7ec20af2014-07-24 17:34:58 +02002375 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
Chris Mason236454d2007-04-19 13:37:44 -04002376}
2377
Chris Masondb945352007-10-15 16:15:53 -04002378BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2379 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002380BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2381 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002382BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2383 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002384BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2385 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04002386BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2387 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04002388BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2389 ram_bytes, 64);
2390BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2391 compression, 8);
2392BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2393 encryption, 8);
2394BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2395 other_encoding, 16);
2396
Chris Masonc8b97812008-10-29 14:49:59 -04002397/*
2398 * this returns the number of bytes used by the item on disk, minus the
2399 * size of any extent headers. If a file is compressed on disk, this is
2400 * the compressed size
2401 */
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002402static inline u32 btrfs_file_extent_inline_item_len(
2403 const struct extent_buffer *eb,
2404 struct btrfs_item *e)
Chris Masonc8b97812008-10-29 14:49:59 -04002405{
David Sterba7ec20af2014-07-24 17:34:58 +02002406 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
Chris Masonc8b97812008-10-29 14:49:59 -04002407}
Chris Mason9f5fae22007-03-20 14:38:32 -04002408
Chris Mason514ac8a2014-01-03 21:07:00 -08002409/* this returns the number of file bytes represented by the inline item.
2410 * If an item is compressed, this is the uncompressed size
2411 */
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002412static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
2413 int slot,
2414 const struct btrfs_file_extent_item *fi)
Chris Mason514ac8a2014-01-03 21:07:00 -08002415{
2416 struct btrfs_map_token token;
2417
2418 btrfs_init_map_token(&token);
2419 /*
2420 * return the space used on disk if this item isn't
2421 * compressed or encoded
2422 */
2423 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2424 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2425 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2426 return btrfs_file_extent_inline_item_len(eb,
2427 btrfs_item_nr(slot));
2428 }
2429
2430 /* otherwise use the ram bytes field */
2431 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2432}
2433
2434
Stefan Behrens733f4fb2012-05-25 16:06:10 +02002435/* btrfs_dev_stats_item */
Jeff Mahoney1cbb1f42017-06-28 21:56:53 -06002436static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2437 const struct btrfs_dev_stats_item *ptr,
Stefan Behrens733f4fb2012-05-25 16:06:10 +02002438 int index)
2439{
2440 u64 val;
2441
2442 read_extent_buffer(eb, &val,
2443 offsetof(struct btrfs_dev_stats_item, values) +
2444 ((unsigned long)ptr) + (index * sizeof(u64)),
2445 sizeof(val));
2446 return val;
2447}
2448
2449static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2450 struct btrfs_dev_stats_item *ptr,
2451 int index, u64 val)
2452{
2453 write_extent_buffer(eb, &val,
2454 offsetof(struct btrfs_dev_stats_item, values) +
2455 ((unsigned long)ptr) + (index * sizeof(u64)),
2456 sizeof(val));
2457}
2458
Arne Jansen630dc772011-09-13 11:06:07 +02002459/* btrfs_qgroup_status_item */
2460BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2461 generation, 64);
2462BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2463 version, 64);
2464BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2465 flags, 64);
Jan Schmidt2f232032013-04-25 16:04:51 +00002466BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2467 rescan, 64);
Arne Jansen630dc772011-09-13 11:06:07 +02002468
2469/* btrfs_qgroup_info_item */
2470BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2471 generation, 64);
2472BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2473BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2474 rfer_cmpr, 64);
2475BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2476BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2477 excl_cmpr, 64);
2478
2479BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2480 struct btrfs_qgroup_info_item, generation, 64);
2481BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2482 rfer, 64);
2483BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2484 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2485BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2486 excl, 64);
2487BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2488 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2489
2490/* btrfs_qgroup_limit_item */
2491BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2492 flags, 64);
2493BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2494 max_rfer, 64);
2495BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2496 max_excl, 64);
2497BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2498 rsv_rfer, 64);
2499BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2500 rsv_excl, 64);
2501
Stefan Behrensa2bff642012-11-05 17:32:20 +01002502/* btrfs_dev_replace_item */
2503BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2504 struct btrfs_dev_replace_item, src_devid, 64);
2505BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2506 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2507 64);
2508BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2509 replace_state, 64);
2510BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2511 time_started, 64);
2512BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2513 time_stopped, 64);
2514BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2515 num_write_errors, 64);
2516BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2517 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2518 64);
2519BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2520 cursor_left, 64);
2521BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2522 cursor_right, 64);
2523
2524BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2525 struct btrfs_dev_replace_item, src_devid, 64);
2526BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2527 struct btrfs_dev_replace_item,
2528 cont_reading_from_srcdev_mode, 64);
2529BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2530 struct btrfs_dev_replace_item, replace_state, 64);
2531BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2532 struct btrfs_dev_replace_item, time_started, 64);
2533BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2534 struct btrfs_dev_replace_item, time_stopped, 64);
2535BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2536 struct btrfs_dev_replace_item, num_write_errors, 64);
2537BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2538 struct btrfs_dev_replace_item,
2539 num_uncorrectable_read_errors, 64);
2540BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2541 struct btrfs_dev_replace_item, cursor_left, 64);
2542BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2543 struct btrfs_dev_replace_item, cursor_right, 64);
2544
Chris Mason4beb1b82007-03-14 10:31:29 -04002545/* helper function to cast into the data area of the leaf. */
2546#define btrfs_item_ptr(leaf, slot, type) \
Nikolay Borisov3d9ec8c2017-05-29 09:43:43 +03002547 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
Chris Mason5f39d392007-10-15 16:14:19 -04002548 btrfs_item_offset_nr(leaf, slot)))
2549
2550#define btrfs_item_ptr_offset(leaf, slot) \
Nikolay Borisov3d9ec8c2017-05-29 09:43:43 +03002551 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
Chris Mason5f39d392007-10-15 16:14:19 -04002552 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04002553
Josef Bacik67377732010-09-16 16:19:09 -04002554static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2555{
2556 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2557 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2558}
2559
Josef Bacik3b16a4e2011-09-21 15:05:58 -04002560static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2561{
Michal Hockoc62d2552015-11-06 16:28:49 -08002562 return mapping_gfp_constraint(mapping, ~__GFP_FS);
Josef Bacik3b16a4e2011-09-21 15:05:58 -04002563}
2564
Chris Masonb18c6682007-04-17 13:26:50 -04002565/* extent-tree.c */
Chris Mason28f75a02015-02-04 06:59:29 -08002566
Liu Bo167ce952017-08-18 15:15:18 -06002567enum btrfs_inline_ref_type {
2568 BTRFS_REF_TYPE_INVALID = 0,
2569 BTRFS_REF_TYPE_BLOCK = 1,
2570 BTRFS_REF_TYPE_DATA = 2,
2571 BTRFS_REF_TYPE_ANY = 3,
2572};
2573
2574int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2575 struct btrfs_extent_inline_ref *iref,
2576 enum btrfs_inline_ref_type is_data);
2577
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002578u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
Chris Mason28f75a02015-02-04 06:59:29 -08002579
Jeff Mahoney27965b62016-06-16 11:07:27 -04002580static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
Josef Bacik9e0baf62011-07-15 15:16:44 +00002581 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08002582{
Omar Sandoval70e7af22017-06-02 01:20:01 -07002583 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
Miao Xie16cdcec2011-04-22 18:12:22 +08002584}
2585
Josef Bacik07127182011-08-19 10:29:59 -04002586/*
2587 * Doing a truncate won't result in new nodes or leaves, just what we need for
2588 * COW.
2589 */
Jeff Mahoney27965b62016-06-16 11:07:27 -04002590static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
Josef Bacik07127182011-08-19 10:29:59 -04002591 unsigned num_items)
2592{
Omar Sandoval70e7af22017-06-02 01:20:01 -07002593 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
Josef Bacik07127182011-08-19 10:29:59 -04002594}
2595
Josef Bacik1be41b72013-06-12 13:56:06 -04002596int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002597 struct btrfs_fs_info *fs_info);
Josef Bacik0a2b2a82014-01-23 10:54:11 -05002598int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002599 struct btrfs_fs_info *fs_info);
Filipe Manana9cfa3e32016-04-26 15:39:32 +01002600void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2601 const u64 start);
2602void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
Filipe Mananaf78c4362016-05-09 13:15:41 +01002603bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2604void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2605void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
Chris Masonfa9c0d792009-04-03 09:47:43 -04002606void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04002607int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002608 struct btrfs_fs_info *fs_info, unsigned long count);
2609int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
Josef Bacik31b96552016-04-11 17:37:40 -04002610 unsigned long count, u64 transid, int wait);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002611int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002612int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002613 struct btrfs_fs_info *fs_info, u64 bytenr,
Josef Bacik3173a182013-03-07 14:22:04 -05002614 u64 offset, int metadata, u64 *refs, u64 *flags);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002615int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
Yan Zheng11833d62009-09-11 16:11:19 -04002616 u64 bytenr, u64 num, int reserved);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002617int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
Chris Masone688b7252011-10-31 20:52:39 -04002618 u64 bytenr, u64 num_bytes);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002619int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
Josef Bacik8c2a1a32013-06-06 13:19:32 -04002620 struct extent_buffer *eb);
Liu Boe4c3b2d2017-01-30 12:25:28 -08002621int btrfs_cross_ref_exist(struct btrfs_root *root,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002622 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05002623struct btrfs_block_group_cache *btrfs_lookup_block_group(
2624 struct btrfs_fs_info *info,
2625 u64 bytenr);
Filipe Manana758f2df2015-11-19 11:45:48 +00002626void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002627void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Jeff Mahoney6ab0a202013-11-01 13:07:04 -04002628int get_block_group_index(struct btrfs_block_group_cache *cache);
David Sterba4d75f8a2014-06-15 01:54:12 +02002629struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
Omar Sandoval310712b2017-01-17 23:24:37 -08002630 struct btrfs_root *root,
2631 u64 parent, u64 root_objectid,
2632 const struct btrfs_disk_key *key,
2633 int level, u64 hint,
2634 u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002635void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2636 struct btrfs_root *root,
2637 struct extent_buffer *buf,
Jan Schmidt5581a512012-05-16 17:04:52 +02002638 u64 parent, int last_ref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002639int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
Josef Bacik84f7d8e2017-09-29 15:43:49 -04002640 struct btrfs_root *root, u64 owner,
Qu Wenruo5846a3c2015-10-26 14:11:18 +08002641 u64 offset, u64 ram_bytes,
2642 struct btrfs_key *ins);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002643int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002644 struct btrfs_fs_info *fs_info,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002645 u64 root_objectid, u64 owner, u64 offset,
2646 struct btrfs_key *ins);
Wang Xiaoguang18513092016-07-25 15:51:40 +08002647int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
Josef Bacik00361582013-08-14 14:02:47 -04002648 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
Miao Xiee570fd22014-06-19 10:42:50 +08002649 struct btrfs_key *ins, int is_data, int delalloc);
Chris Masone089f052007-03-16 16:20:31 -04002650int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07002651 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002652int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Josef Bacike339a6b2014-07-02 10:54:25 -07002653 struct extent_buffer *buf, int full_backref);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002654int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002655 struct btrfs_fs_info *fs_info,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002656 u64 bytenr, u64 num_bytes, u64 flags,
Josef Bacikb1c79e02013-05-09 13:49:30 -04002657 int level, int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002658int btrfs_free_extent(struct btrfs_trans_handle *trans,
Josef Bacik84f7d8e2017-09-29 15:43:49 -04002659 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002660 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
Filipe Mananab06c4bf2015-10-23 07:52:54 +01002661 u64 owner, u64 offset);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002662
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002663int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2664 u64 start, u64 len, int delalloc);
2665int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
Chris Masone688b7252011-10-31 20:52:39 -04002666 u64 start, u64 len);
David Sterba8b74c032017-02-10 19:20:56 +01002667void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
Chris Masonccd467d2007-06-28 15:57:36 -04002668int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002669 struct btrfs_fs_info *fs_info);
Chris Masonb18c6682007-04-17 13:26:50 -04002670int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Josef Bacik84f7d8e2017-09-29 15:43:49 -04002671 struct btrfs_root *root,
Zheng Yan31840ae2008-09-23 13:14:14 -04002672 u64 bytenr, u64 num_bytes, u64 parent,
Filipe Mananab06c4bf2015-10-23 07:52:54 +01002673 u64 root_objectid, u64 owner, u64 offset);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002674
Chris Mason1bbc6212015-04-06 12:46:08 -07002675int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002676 struct btrfs_fs_info *fs_info);
Chris Mason9078a3e2007-04-26 16:46:15 -04002677int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002678 struct btrfs_fs_info *fs_info);
Josef Bacikdcdf7f62015-03-02 16:37:31 -05002679int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002680 struct btrfs_fs_info *fs_info);
2681int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002682int btrfs_free_block_groups(struct btrfs_fs_info *info);
Jeff Mahoney5b4aace2016-06-21 10:40:19 -04002683int btrfs_read_block_groups(struct btrfs_fs_info *info);
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04002684int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002685int btrfs_make_block_group(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002686 struct btrfs_fs_info *fs_info, u64 bytes_used,
Nikolay Borisov01744842017-07-27 14:22:11 +03002687 u64 type, u64 chunk_offset, u64 size);
Filipe Manana8eab77f2015-11-13 23:57:16 +00002688struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
Filipe Manana7fd01182015-11-13 23:57:17 +00002689 struct btrfs_fs_info *fs_info,
2690 const u64 chunk_offset);
Zheng Yan1a40e232008-09-26 10:09:34 -04002691int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04002692 struct btrfs_fs_info *fs_info, u64 group_start,
Filipe Manana04216822014-11-27 21:14:15 +00002693 struct extent_map *em);
Josef Bacik47ab2a62014-09-18 11:20:02 -04002694void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04002695void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2696void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
Josef Bacikea658ba2012-09-11 16:57:25 -04002697void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002698 struct btrfs_fs_info *fs_info);
Jeff Mahoney1b868262017-05-17 11:38:35 -04002699u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2700u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2701u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
Chris Mason4184ea72009-03-10 12:39:20 -04002702void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Miao Xie08e007d2012-10-16 11:33:38 +00002703
2704enum btrfs_reserve_flush_enum {
2705 /* If we are in the transaction, we can't flush anything.*/
2706 BTRFS_RESERVE_NO_FLUSH,
2707 /*
2708 * Flushing delalloc may cause deadlock somewhere, in this
2709 * case, use FLUSH LIMIT
2710 */
2711 BTRFS_RESERVE_FLUSH_LIMIT,
2712 BTRFS_RESERVE_FLUSH_ALL,
2713};
2714
Josef Bacikf376df22016-03-25 13:25:56 -04002715enum btrfs_flush_state {
2716 FLUSH_DELAYED_ITEMS_NR = 1,
2717 FLUSH_DELAYED_ITEMS = 2,
2718 FLUSH_DELALLOC = 3,
2719 FLUSH_DELALLOC_WAIT = 4,
2720 ALLOC_CHUNK = 5,
2721 COMMIT_TRANS = 6,
2722};
2723
Nikolay Borisov04f4f912017-02-20 13:50:36 +02002724int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
Qu Wenruo364ecf32017-02-27 15:10:38 +08002725int btrfs_check_data_free_space(struct inode *inode,
2726 struct extent_changeset **reserved, u64 start, u64 len);
Qu Wenruobc42bda2017-02-27 15:10:39 +08002727void btrfs_free_reserved_data_space(struct inode *inode,
2728 struct extent_changeset *reserved, u64 start, u64 len);
2729void btrfs_delalloc_release_space(struct inode *inode,
2730 struct extent_changeset *reserved, u64 start, u64 len);
Qu Wenruo51773be2015-10-08 18:19:37 +08002731void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2732 u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002733void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002734 struct btrfs_fs_info *fs_info);
Filipe Manana4fbcdf62015-05-20 14:01:54 +01002735void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002736int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
Nikolay Borisov8ed7a2a2017-02-20 13:50:39 +02002737 struct btrfs_inode *inode);
Nikolay Borisov703b3912017-02-20 13:50:40 +02002738void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
Miao Xied5c12072013-02-28 10:04:33 +00002739int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2740 struct btrfs_block_rsv *rsv,
2741 int nitems,
Jeff Mahoneyee3441b2013-07-09 16:37:21 -04002742 u64 *qgroup_reserved, bool use_global_rsv);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002743void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
David Sterba7775c812017-02-10 19:18:18 +01002744 struct btrfs_block_rsv *rsv);
Nikolay Borisov9f3db422017-02-20 13:50:41 +02002745int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
Nikolay Borisov691fa052017-02-20 13:50:42 +02002746void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes);
Qu Wenruo364ecf32017-02-27 15:10:38 +08002747int btrfs_delalloc_reserve_space(struct inode *inode,
2748 struct extent_changeset **reserved, u64 start, u64 len);
Miao Xie66d8f3d2012-09-06 04:02:28 -06002749void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002750struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
Miao Xie66d8f3d2012-09-06 04:02:28 -06002751 unsigned short type);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002752void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002753 struct btrfs_block_rsv *rsv);
Chris Masoncdfb0802015-04-06 18:17:00 -07002754void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04002755int btrfs_block_rsv_add(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00002756 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2757 enum btrfs_reserve_flush_enum flush);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002758int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
Josef Bacik36ba0222011-10-18 12:15:48 -04002759int btrfs_block_rsv_refill(struct btrfs_root *root,
Miao Xie08e007d2012-10-16 11:33:38 +00002760 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2761 enum btrfs_reserve_flush_enum flush);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002762int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
Josef Bacik25d609f2016-03-25 13:25:48 -04002763 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2764 int update_size);
Josef Bacikd52be812013-05-29 14:54:47 -04002765int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2766 struct btrfs_block_rsv *dest, u64 num_bytes,
2767 int min_factor);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002768void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002769 struct btrfs_block_rsv *block_rsv,
2770 u64 num_bytes);
Jeff Mahoney5e00f192017-02-15 16:28:29 -05002771int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002772 struct btrfs_block_group_cache *cache);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002773void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04002774void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00002775u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002776int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
liuboacce9522011-01-06 19:30:25 +08002777 u64 start, u64 end);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002778int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
Filipe Manana1edb647b2014-12-08 14:01:12 +00002779 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05002780int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002781 struct btrfs_fs_info *fs_info, u64 type);
2782int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08002783
liuboc59021f2011-03-07 02:13:14 +00002784int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Arne Jansenbed92ea2012-06-28 18:03:02 +02002785int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2786 struct btrfs_fs_info *fs_info);
Liu Bo31e50222012-11-21 14:18:10 +00002787int __get_raid_index(u64 flags);
David Sterbaea14b57f2017-06-22 02:19:11 +02002788int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2789void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
Zhao Lei0bc19f902016-01-06 18:56:36 +08002790void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
Filipe Manana39c2d7f2015-05-20 14:01:55 +01002791void check_system_chunk(struct btrfs_trans_handle *trans,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002792 struct btrfs_fs_info *fs_info, const u64 type);
Omar Sandovala5ed9182015-09-29 20:50:35 -07002793u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2794 struct btrfs_fs_info *info, u64 start, u64 end);
2795
Chris Masondee26a92007-03-26 16:00:06 -04002796/* ctree.c */
Omar Sandoval310712b2017-01-17 23:24:37 -08002797int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002798 int level, int *slot);
Omar Sandoval310712b2017-01-17 23:24:37 -08002799int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002800int btrfs_previous_item(struct btrfs_root *root,
2801 struct btrfs_path *path, u64 min_objectid,
2802 int type);
Wang Shilongade2e0b2014-01-12 21:38:33 +08002803int btrfs_previous_extent_item(struct btrfs_root *root,
2804 struct btrfs_path *path, u64 min_objectid);
Daniel Dresslerb7a03652014-11-12 13:43:09 +09002805void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2806 struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002807 const struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002808struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2809struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Josef Bacik84f7d8e2017-09-29 15:43:49 -04002810struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002811int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002812 struct btrfs_key *key, int lowest_level,
Eric Sandeende78b512013-01-31 18:21:12 +00002813 u64 min_trans);
Chris Mason3f157a22008-06-25 16:01:31 -04002814int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Eric Sandeende78b512013-01-31 18:21:12 +00002815 struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002816 u64 min_trans);
Alexander Block70698302012-06-05 21:07:48 +02002817enum btrfs_compare_tree_result {
2818 BTRFS_COMPARE_TREE_NEW,
2819 BTRFS_COMPARE_TREE_DELETED,
2820 BTRFS_COMPARE_TREE_CHANGED,
Josef Bacikba5e8f22013-08-16 16:52:55 -04002821 BTRFS_COMPARE_TREE_SAME,
Alexander Block70698302012-06-05 21:07:48 +02002822};
Nikolay Borisovee8c4942017-08-21 12:43:45 +03002823typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
Alexander Block70698302012-06-05 21:07:48 +02002824 struct btrfs_path *right_path,
2825 struct btrfs_key *key,
2826 enum btrfs_compare_tree_result result,
2827 void *ctx);
2828int btrfs_compare_trees(struct btrfs_root *left_root,
2829 struct btrfs_root *right_root,
2830 btrfs_changed_cb_t cb, void *ctx);
Chris Mason5f39d392007-10-15 16:14:19 -04002831int btrfs_cow_block(struct btrfs_trans_handle *trans,
2832 struct btrfs_root *root, struct extent_buffer *buf,
2833 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002834 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002835int btrfs_copy_root(struct btrfs_trans_handle *trans,
2836 struct btrfs_root *root,
2837 struct extent_buffer *buf,
2838 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002839int btrfs_block_can_be_shared(struct btrfs_root *root,
2840 struct extent_buffer *buf);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002841void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
Jeff Mahoney143bede2012-03-01 14:56:26 +01002842 u32 data_size);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002843void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2844 struct btrfs_path *path, u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002845int btrfs_split_item(struct btrfs_trans_handle *trans,
2846 struct btrfs_root *root,
2847 struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002848 const struct btrfs_key *new_key,
Chris Mason459931e2008-12-10 09:10:46 -05002849 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002850int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2851 struct btrfs_root *root,
2852 struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002853 const struct btrfs_key *new_key);
Kelley Nielsene33d5c32013-11-04 19:33:33 -08002854int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2855 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
Omar Sandoval310712b2017-01-17 23:24:37 -08002856int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2857 const struct btrfs_key *key, struct btrfs_path *p,
2858 int ins_len, int cow);
2859int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
Jan Schmidt5d9e75c42012-05-16 18:25:47 +02002860 struct btrfs_path *p, u64 time_seq);
Arne Jansen2f38b3e2011-09-13 11:18:10 +02002861int btrfs_search_slot_for_read(struct btrfs_root *root,
Omar Sandoval310712b2017-01-17 23:24:37 -08002862 const struct btrfs_key *key,
2863 struct btrfs_path *p, int find_higher,
2864 int return_any);
Chris Mason6702ed42007-08-07 16:15:09 -04002865int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002866 struct btrfs_root *root, struct extent_buffer *parent,
Eric Sandeende78b512013-01-31 18:21:12 +00002867 int start_slot, u64 *last_ret,
Chris Masona6b6e752007-10-15 16:22:39 -04002868 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02002869void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04002870struct btrfs_path *btrfs_alloc_path(void);
2871void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002872void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08002873void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04002874 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002875void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2876
Chris Mason85e21ba2008-01-29 15:11:36 -05002877int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2878 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05002879static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2880 struct btrfs_root *root,
2881 struct btrfs_path *path)
2882{
2883 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2884}
2885
Tsutomu Itohafe5fea2013-04-16 05:18:22 +00002886void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002887 const struct btrfs_key *cpu_key, u32 *data_size,
Jeff Mahoney143bede2012-03-01 14:56:26 +01002888 u32 total_data, u32 total_size, int nr);
Omar Sandoval310712b2017-01-17 23:24:37 -08002889int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2890 const struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05002891int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2892 struct btrfs_root *root,
2893 struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002894 const struct btrfs_key *cpu_key, u32 *data_size,
2895 int nr);
Chris Mason9c583092008-01-29 15:15:18 -05002896
2897static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2898 struct btrfs_root *root,
2899 struct btrfs_path *path,
Omar Sandoval310712b2017-01-17 23:24:37 -08002900 const struct btrfs_key *key,
Chris Mason9c583092008-01-29 15:15:18 -05002901 u32 data_size)
2902{
2903 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2904}
2905
Chris Mason234b63a2007-03-13 10:46:10 -04002906int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Josef Bacik16e75492013-10-22 12:18:51 -04002907int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidt3d7806e2012-06-11 08:29:29 +02002908int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2909 u64 time_seq);
Alexander Block1c8f52a2012-06-19 07:42:25 -06002910static inline int btrfs_next_old_item(struct btrfs_root *root,
2911 struct btrfs_path *p, u64 time_seq)
Jan Schmidtc7d22a32011-11-22 15:14:33 +01002912{
2913 ++p->slots[0];
2914 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
Alexander Block1c8f52a2012-06-19 07:42:25 -06002915 return btrfs_next_old_leaf(root, p, time_seq);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01002916 return 0;
2917}
Alexander Block1c8f52a2012-06-19 07:42:25 -06002918static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2919{
2920 return btrfs_next_old_item(root, p, 0);
2921}
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002922int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2923 struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04002924int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2925 struct btrfs_block_rsv *block_rsv,
2926 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04002927int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2928 struct btrfs_root *root,
2929 struct extent_buffer *node,
2930 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02002931static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2932{
2933 /*
Josef Bacikafcdd122016-09-02 15:40:02 -04002934 * Do it this way so we only ever do one test_bit in the normal case.
David Sterba7841cb22011-05-31 18:07:27 +02002935 */
Josef Bacikafcdd122016-09-02 15:40:02 -04002936 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2937 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2938 return 2;
2939 return 1;
2940 }
2941 return 0;
David Sterba7841cb22011-05-31 18:07:27 +02002942}
Miao Xiebabbf1702013-05-14 10:20:43 +00002943
2944/*
2945 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2946 * anything except sleeping. This function is used to check the status of
2947 * the fs.
2948 */
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002949static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
Miao Xiebabbf1702013-05-14 10:20:43 +00002950{
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04002951 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info);
Miao Xiebabbf1702013-05-14 10:20:43 +00002952}
2953
David Sterba6c417612011-04-13 15:41:04 +02002954static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2955{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02002956 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02002957 kfree(fs_info->delayed_root);
2958 kfree(fs_info->extent_root);
2959 kfree(fs_info->tree_root);
2960 kfree(fs_info->chunk_root);
2961 kfree(fs_info->dev_root);
2962 kfree(fs_info->csum_root);
Arne Jansenbcef60f2011-09-13 15:23:30 +02002963 kfree(fs_info->quota_root);
Filipe David Borba Mananad8f98032013-08-24 19:51:06 +01002964 kfree(fs_info->uuid_root);
Omar Sandoval70f6d822015-09-29 20:50:38 -07002965 kfree(fs_info->free_space_root);
David Sterba6c417612011-04-13 15:41:04 +02002966 kfree(fs_info->super_copy);
2967 kfree(fs_info->super_for_commit);
Qu Wenruof667aef2014-09-23 13:40:08 +08002968 security_free_mnt_opts(&fs_info->security_opts);
David Sterba6c417612011-04-13 15:41:04 +02002969 kfree(fs_info);
2970}
David Sterba7841cb22011-05-31 18:07:27 +02002971
Jan Schmidt097b8a72012-06-21 11:08:04 +02002972/* tree mod log functions from ctree.c */
2973u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2974 struct seq_list *elem);
2975void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2976 struct seq_list *elem);
Jan Schmidt5b6602e2012-10-23 11:28:27 +02002977int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
Jan Schmidt097b8a72012-06-21 11:08:04 +02002978
Chris Masondee26a92007-03-26 16:00:06 -04002979/* root-item.c */
Chris Mason0660b5a2008-11-17 20:37:39 -05002980int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04002981 struct btrfs_fs_info *fs_info,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002982 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2983 const char *name, int name_len);
2984int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04002985 struct btrfs_fs_info *fs_info,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002986 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05002987 const char *name, int name_len);
Jeff Mahoney1cd54472017-08-17 10:25:11 -04002988int btrfs_del_root(struct btrfs_trans_handle *trans,
2989 struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
Omar Sandoval310712b2017-01-17 23:24:37 -08002990int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2991 const struct btrfs_key *key,
2992 struct btrfs_root_item *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04002993int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2994 struct btrfs_root *root,
2995 struct btrfs_key *key,
2996 struct btrfs_root_item *item);
Omar Sandoval310712b2017-01-17 23:24:37 -08002997int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
Miao Xiecb517ea2013-05-15 07:48:19 +00002998 struct btrfs_path *path, struct btrfs_root_item *root_item,
2999 struct btrfs_key *root_key);
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04003000int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00003001void btrfs_set_root_node(struct btrfs_root_item *item,
3002 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00003003void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
Alexander Block8ea05e32012-07-25 17:35:53 +02003004void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root);
Li Zefan08fe4db2011-03-28 02:01:25 +00003006
Stefan Behrens07b30a42013-08-15 17:11:17 +02003007/* uuid-tree.c */
3008int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04003009 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
Stefan Behrens07b30a42013-08-15 17:11:17 +02003010 u64 subid);
3011int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04003012 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
Stefan Behrens07b30a42013-08-15 17:11:17 +02003013 u64 subid);
Stefan Behrens70f80172013-08-15 17:11:23 +02003014int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3015 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3016 u64));
Stefan Behrens07b30a42013-08-15 17:11:17 +02003017
Chris Masondee26a92007-03-26 16:00:06 -04003018/* dir-item.c */
Chris Mason9c520572012-12-17 14:26:57 -05003019int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3020 const char *name, int name_len);
Chris Masond3977122009-01-05 21:25:51 -05003021int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3022 struct btrfs_root *root, const char *name,
Nikolay Borisov8e7611c2017-02-20 13:50:31 +02003023 int name_len, struct btrfs_inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04003024 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04003025struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct btrfs_path *path, u64 dir,
3028 const char *name, int name_len,
3029 int mod);
3030struct btrfs_dir_item *
3031btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3032 struct btrfs_root *root,
3033 struct btrfs_path *path, u64 dir,
3034 u64 objectid, const char *name, int name_len,
3035 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003036struct btrfs_dir_item *
3037btrfs_search_dir_index_item(struct btrfs_root *root,
3038 struct btrfs_path *path, u64 dirid,
3039 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04003040int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3041 struct btrfs_root *root,
3042 struct btrfs_path *path,
3043 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05003044int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003045 struct btrfs_root *root,
3046 struct btrfs_path *path, u64 objectid,
3047 const char *name, u16 name_len,
3048 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05003049struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3050 struct btrfs_root *root,
3051 struct btrfs_path *path, u64 dir,
3052 const char *name, u16 name_len,
3053 int mod);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003054int verify_dir_item(struct btrfs_fs_info *fs_info,
Su Yuee79a3322017-06-06 17:57:01 +08003055 struct extent_buffer *leaf, int slot,
Josef Bacik22a94d42011-03-16 16:47:17 -04003056 struct btrfs_dir_item *dir_item);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003057struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
Filipe Manana5f5bc6b2014-11-09 08:38:39 +00003058 struct btrfs_path *path,
3059 const char *name,
3060 int name_len);
Su Yue19c6dcb2017-06-06 17:57:00 +08003061bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot,
3062 unsigned long start, u16 name_len);
Josef Bacik7b128762008-07-24 12:17:14 -04003063
3064/* orphan.c */
3065int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root, u64 offset);
3067int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3068 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003069int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04003070
Chris Masondee26a92007-03-26 16:00:06 -04003071/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05003072int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3073 struct btrfs_root *root,
3074 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003075 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05003076int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3077 struct btrfs_root *root,
3078 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04003079 u64 inode_objectid, u64 ref_objectid, u64 *index);
Chris Mason5f39d392007-10-15 16:14:19 -04003080int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *root,
3082 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04003083int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04003084 *root, struct btrfs_path *path,
3085 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04003086
Mark Fashehf1863732012-08-08 11:32:27 -07003087struct btrfs_inode_extref *
3088btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3089 struct btrfs_root *root,
3090 struct btrfs_path *path,
3091 const char *name, int name_len,
3092 u64 inode_objectid, u64 ref_objectid, int ins_len,
3093 int cow);
3094
3095int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3096 u64 ref_objectid, const char *name,
3097 int name_len,
3098 struct btrfs_inode_extref **extref_ret);
3099
Chris Masondee26a92007-03-26 16:00:06 -04003100/* file-item.c */
Miao Xiefacc8a222013-07-25 19:22:34 +08003101struct btrfs_dio_private;
Chris Mason459931e2008-12-10 09:10:46 -05003102int btrfs_del_csums(struct btrfs_trans_handle *trans,
Jeff Mahoney5b4aace2016-06-21 10:40:19 -04003103 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
Christoph Hellwig4e4cbee2017-06-03 09:38:06 +02003104blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3105blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003106 u64 logical_offset);
Chris Masonb18c6682007-04-17 13:26:50 -04003107int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04003108 struct btrfs_root *root,
3109 u64 objectid, u64 pos,
3110 u64 disk_offset, u64 disk_num_bytes,
3111 u64 num_bytes, u64 offset, u64 ram_bytes,
3112 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04003113int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04003116 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05003117int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05003118 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04003119 struct btrfs_ordered_sum *sums);
Christoph Hellwig4e4cbee2017-06-03 09:38:06 +02003120blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003121 u64 file_start, int contig);
Arne Jansena2de7332011-03-08 14:14:00 +01003122int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3123 struct list_head *list, int search_commit);
Nikolay Borisov9cdc5122017-02-20 13:51:02 +02003124void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
Filipe Manana7ffbb592014-06-09 03:48:05 +01003125 const struct btrfs_path *path,
3126 struct btrfs_file_extent_item *fi,
3127 const bool new_inline,
3128 struct extent_map *em);
3129
Chris Mason39279cc2007-06-12 06:35:45 -04003130/* inode.c */
Miao Xie8ccf6f192012-10-25 09:28:04 +00003131struct btrfs_delalloc_work {
3132 struct inode *inode;
Miao Xie8ccf6f192012-10-25 09:28:04 +00003133 int delay_iput;
3134 struct completion completion;
3135 struct list_head list;
3136 struct btrfs_work work;
3137};
3138
3139struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
David Sterba651d4942015-11-27 19:24:16 +01003140 int delay_iput);
Miao Xie8ccf6f192012-10-25 09:28:04 +00003141void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3142
Nikolay Borisovfc4f21b12017-02-20 13:51:06 +02003143struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3144 struct page *page, size_t pg_offset, u64 start,
3145 u64 len, int create);
Josef Bacik00361582013-08-14 14:02:47 -04003146noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
Josef Bacik7ee9e442013-06-21 16:37:03 -04003147 u64 *orig_start, u64 *orig_block_len,
3148 u64 *ram_bytes);
Chris Mason4881ee52008-07-24 09:51:08 -04003149
Chris Mason3de45862008-11-17 21:02:50 -05003150struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
Nikolay Borisov70ddc552017-02-20 13:50:35 +02003151int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04003152int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
Nikolay Borisov4ec59342017-01-18 00:31:44 +02003154 struct btrfs_inode *dir, struct btrfs_inode *inode,
Chris Masone02119d2008-09-05 16:13:11 -04003155 const char *name, int name_len);
3156int btrfs_add_link(struct btrfs_trans_handle *trans,
Nikolay Borisovdb0a6692017-02-20 13:51:08 +02003157 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
Chris Masone02119d2008-09-05 16:13:11 -04003158 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04003159int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3160 struct btrfs_root *root,
3161 struct inode *dir, u64 objectid,
3162 const char *name, int name_len);
Chandan Rajendra9703fef2016-01-21 15:55:56 +05303163int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
Josef Bacik2aaa6652012-08-29 14:27:18 -04003164 int front);
Chris Masone02119d2008-09-05 16:13:11 -04003165int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3166 struct btrfs_root *root,
3167 struct inode *inode, u64 new_size,
3168 u32 min_type);
3169
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003170int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Miao Xie6c255e62014-03-06 13:55:01 +08003171int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3172 int nr);
Josef Bacik2ac55d42010-02-03 19:33:23 +00003173int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
Qu Wenruoba8b04c2016-07-19 16:50:36 +08003174 struct extent_state **cached_state, int dedupe);
Yan Zhengd2fb3432008-12-11 16:30:39 -05003175int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Filipe David Borba Manana63541922014-01-07 11:47:46 +00003176 struct btrfs_root *new_root,
3177 struct btrfs_root *parent_root,
3178 u64 new_dirid);
Mike Christie81a75f672016-06-05 14:31:54 -05003179int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
David Woodhouse64a16702009-07-15 23:29:37 +01003180 size_t size, struct bio *bio,
3181 unsigned long bio_flags);
Josef Bacikc6100a42017-05-05 11:57:13 -04003182void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
Dave Jiang11bac802017-02-24 14:56:41 -08003183int btrfs_page_mkwrite(struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04003184int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04003185void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01003186int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04003187struct inode *btrfs_alloc_inode(struct super_block *sb);
3188void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04003189int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04003190int btrfs_init_cachep(void);
3191void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04003192long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05303193struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00003194 struct btrfs_root *root, int *was_new);
Nikolay Borisovfc4f21b12017-02-20 13:51:06 +02003195struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3196 struct page *page, size_t pg_offset,
3197 u64 start, u64 end, int create);
Chris Masona52d9a82007-08-27 16:49:44 -04003198int btrfs_update_inode(struct btrfs_trans_handle *trans,
3199 struct btrfs_root *root,
3200 struct inode *inode);
Josef Bacikbe6aef62012-10-22 15:43:12 -04003201int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, struct inode *inode);
Nikolay Borisov73f2e542017-02-20 13:50:59 +02003203int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3204 struct btrfs_inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05003205int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04003206void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05003208int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003209void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00003210void btrfs_add_delayed_iput(struct inode *inode);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003211void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
Yan, Zhengefa56462010-05-16 10:49:59 -04003212int btrfs_prealloc_file_range(struct inode *inode, int mode,
3213 u64 start, u64 num_bytes, u64 min_size,
3214 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04003215int btrfs_prealloc_file_range_trans(struct inode *inode,
3216 struct btrfs_trans_handle *trans, int mode,
3217 u64 start, u64 num_bytes, u64 min_size,
3218 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04003219extern const struct dentry_operations btrfs_dentry_operations;
Josef Bacik6a3891c2015-03-16 17:38:52 -04003220#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3221void btrfs_test_inode_set_ops(struct inode *inode);
3222#endif
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04003223
3224/* ioctl.c */
3225long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Luke Dashjr4c63c242015-10-29 08:22:21 +00003226long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
David Sterbad5131b62016-02-17 15:26:27 +01003227int btrfs_ioctl_get_supported_features(void __user *arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02003228void btrfs_update_iflags(struct inode *inode);
Stefan Behrensdd5f9612013-08-15 17:11:20 +02003229int btrfs_is_empty_uuid(u8 *uuid);
Chris Mason4cb53002011-05-24 15:35:30 -04003230int btrfs_defrag_file(struct inode *inode, struct file *file,
3231 struct btrfs_ioctl_defrag_range_args *range,
3232 u64 newer_than, unsigned long max_pages);
Stefan Behrens5af3e8c2012-08-01 18:56:49 +02003233void btrfs_get_block_group_info(struct list_head *groups_list,
3234 struct btrfs_ioctl_space_info *space);
Stefan Behrens35a36212013-08-14 18:12:25 +02003235void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3236 struct btrfs_ioctl_balance_args *bargs);
Darrick J. Wong2b3909f2015-12-19 00:56:05 -08003237ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3238 struct file *dst_file, u64 dst_loff);
Stefan Behrens35a36212013-08-14 18:12:25 +02003239
Chris Mason39279cc2007-06-12 06:35:45 -04003240/* file.c */
Miao Xie9247f312012-11-26 09:24:43 +00003241int btrfs_auto_defrag_init(void);
3242void btrfs_auto_defrag_exit(void);
Chris Mason4cb53002011-05-24 15:35:30 -04003243int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
Nikolay Borisov6158e1c2017-02-20 13:50:43 +02003244 struct btrfs_inode *inode);
Chris Mason4cb53002011-05-24 15:35:30 -04003245int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Miao Xie26176e72012-11-26 09:26:20 +00003246void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04003247int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Nikolay Borisovdcdbc052017-02-20 13:50:45 +02003248void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
Josef Bacik7014cdb2012-08-30 20:06:49 -04003249 int skip_pinned);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07003250extern const struct file_operations btrfs_file_operations;
Josef Bacik5dc562c2012-08-17 13:14:17 -04003251int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3252 struct btrfs_root *root, struct inode *inode,
3253 struct btrfs_path *path, u64 start, u64 end,
Filipe David Borba Manana1acae572014-01-07 11:42:27 +00003254 u64 *drop_end, int drop_cache,
3255 int replace_extent,
3256 u32 extent_item_size,
3257 int *key_inserted);
Josef Bacik5dc562c2012-08-17 13:14:17 -04003258int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3259 struct btrfs_root *root, struct inode *inode, u64 start,
Josef Bacik26714852012-08-29 12:24:27 -04003260 u64 end, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04003261int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Nikolay Borisov7a6d7062017-02-20 13:50:48 +02003262 struct btrfs_inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04003263int btrfs_release_file(struct inode *inode, struct file *file);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003264int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3265 size_t num_pages, loff_t pos, size_t write_bytes,
Josef Bacikbe1a12a2011-04-06 13:05:22 -04003266 struct extent_state **cached);
Filipe Manana728404d2014-10-10 09:43:11 +01003267int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
Christoph Hellwig04b38d62015-12-03 12:59:50 +01003268int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3269 struct file *file_out, loff_t pos_out, u64 len);
Sage Weil6bf13c02008-06-10 10:07:39 -04003270
Chris Mason6702ed42007-08-07 16:15:09 -04003271/* tree-defrag.c */
3272int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
Eric Sandeende78b512013-01-31 18:21:12 +00003273 struct btrfs_root *root);
Josef Bacik58176a92007-08-29 15:47:34 -04003274
3275/* sysfs.c */
3276int btrfs_init_sysfs(void);
3277void btrfs_exit_sysfs(void);
Anand Jain96f31362015-08-14 18:32:46 +08003278int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
Anand Jain6618a592015-08-14 18:32:47 +08003279void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
Josef Bacik58176a92007-08-29 15:47:34 -04003280
Josef Bacik5103e942007-11-16 11:45:54 -05003281/* xattr.c */
3282ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04003283
Chris Masonedbd8d42007-12-21 16:27:24 -05003284/* super.c */
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003285int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
Qu Wenruo96da0912016-01-19 10:23:03 +08003286 unsigned long new_flags);
Sage Weil6bf13c02008-06-10 10:07:39 -04003287int btrfs_sync_fs(struct super_block *sb, int wait);
Joe Perches533574c2012-07-30 14:40:13 -07003288
Arnd Bergmann2fd57fc2016-09-23 18:05:21 +02003289static inline __printf(2, 3)
3290void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3291{
3292}
3293
Joe Perches533574c2012-07-30 14:40:13 -07003294#ifdef CONFIG_PRINTK
3295__printf(2, 3)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003296void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
Joe Perches533574c2012-07-30 14:40:13 -07003297#else
Arnd Bergmann2fd57fc2016-09-23 18:05:21 +02003298#define btrfs_printk(fs_info, fmt, args...) \
3299 btrfs_no_printk(fs_info, fmt, ##args)
Joe Perches533574c2012-07-30 14:40:13 -07003300#endif
3301
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003302#define btrfs_emerg(fs_info, fmt, args...) \
3303 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3304#define btrfs_alert(fs_info, fmt, args...) \
3305 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3306#define btrfs_crit(fs_info, fmt, args...) \
3307 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3308#define btrfs_err(fs_info, fmt, args...) \
3309 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3310#define btrfs_warn(fs_info, fmt, args...) \
3311 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3312#define btrfs_notice(fs_info, fmt, args...) \
3313 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3314#define btrfs_info(fs_info, fmt, args...) \
3315 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05003316
David Sterba08a84e22015-10-08 08:48:52 +02003317/*
3318 * Wrappers that use printk_in_rcu
3319 */
3320#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3322#define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3324#define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3326#define btrfs_err_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3328#define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3330#define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3332#define btrfs_info_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3334
David Sterba24aa6b42015-10-08 10:27:02 +02003335/*
3336 * Wrappers that use a ratelimited printk_in_rcu
3337 */
3338#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3339 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3340#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3341 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3342#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3343 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3344#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3345 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3346#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3347 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3348#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3349 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3350#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3351 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3352
David Sterba1dd6d7c2015-10-08 10:51:11 +02003353/*
3354 * Wrappers that use a ratelimited printk
3355 */
3356#define btrfs_emerg_rl(fs_info, fmt, args...) \
3357 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3358#define btrfs_alert_rl(fs_info, fmt, args...) \
3359 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3360#define btrfs_crit_rl(fs_info, fmt, args...) \
3361 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3362#define btrfs_err_rl(fs_info, fmt, args...) \
3363 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3364#define btrfs_warn_rl(fs_info, fmt, args...) \
3365 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3366#define btrfs_notice_rl(fs_info, fmt, args...) \
3367 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3368#define btrfs_info_rl(fs_info, fmt, args...) \
3369 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
Jeff Mahoney897a41b2016-08-31 23:55:33 -04003370
3371#if defined(CONFIG_DYNAMIC_DEBUG)
3372#define btrfs_debug(fs_info, fmt, args...) \
3373do { \
3374 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3375 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3376 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3377} while (0)
3378#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3379do { \
3380 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3381 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3382 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3383} while (0)
3384#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3385do { \
3386 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3387 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3388 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3389 ##args);\
3390} while (0)
3391#define btrfs_debug_rl(fs_info, fmt, args...) \
3392do { \
3393 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3394 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3395 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3396 ##args); \
3397} while (0)
3398#elif defined(DEBUG)
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003399#define btrfs_debug(fs_info, fmt, args...) \
3400 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
David Sterba08a84e22015-10-08 08:48:52 +02003401#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3402 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
David Sterba24aa6b42015-10-08 10:27:02 +02003403#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3404 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
David Sterba1dd6d7c2015-10-08 10:51:11 +02003405#define btrfs_debug_rl(fs_info, fmt, args...) \
3406 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05003407#else
3408#define btrfs_debug(fs_info, fmt, args...) \
Jeff Mahoneyc01f5f92016-09-21 12:17:37 -04003409 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
David Sterba08a84e22015-10-08 08:48:52 +02003410#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
Jeff Mahoneyc01f5f92016-09-21 12:17:37 -04003411 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
David Sterba24aa6b42015-10-08 10:27:02 +02003412#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
Jeff Mahoneyc01f5f92016-09-21 12:17:37 -04003413 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
David Sterba1dd6d7c2015-10-08 10:51:11 +02003414#define btrfs_debug_rl(fs_info, fmt, args...) \
Jeff Mahoneyc01f5f92016-09-21 12:17:37 -04003415 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
Frank Holton27a0dd62013-11-12 19:22:53 -05003416#endif
Simon Kirbyc2cf52e2013-03-19 22:41:23 +00003417
David Sterba08a84e22015-10-08 08:48:52 +02003418#define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3419do { \
3420 rcu_read_lock(); \
3421 btrfs_printk(fs_info, fmt, ##args); \
3422 rcu_read_unlock(); \
3423} while (0)
3424
David Sterba24aa6b42015-10-08 10:27:02 +02003425#define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3426do { \
3427 static DEFINE_RATELIMIT_STATE(_rs, \
3428 DEFAULT_RATELIMIT_INTERVAL, \
3429 DEFAULT_RATELIMIT_BURST); \
3430 if (__ratelimit(&_rs)) \
3431 btrfs_printk(fs_info, fmt, ##args); \
3432} while (0)
3433
3434#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3435do { \
3436 rcu_read_lock(); \
3437 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3438 rcu_read_unlock(); \
3439} while (0)
3440
Josef Bacik2e17c7c62013-08-26 16:53:15 -04003441#ifdef CONFIG_BTRFS_ASSERT
3442
David Sterbac0d19e22015-04-24 19:11:57 +02003443__cold
Josef Bacik2e17c7c62013-08-26 16:53:15 -04003444static inline void assfail(char *expr, char *file, int line)
3445{
Jeff Mahoneyab8d0fc2016-09-20 10:05:02 -04003446 pr_err("assertion failed: %s, file: %s, line: %d\n",
Josef Bacik2e17c7c62013-08-26 16:53:15 -04003447 expr, file, line);
3448 BUG();
3449}
3450
3451#define ASSERT(expr) \
3452 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3453#else
3454#define ASSERT(expr) ((void)0)
3455#endif
3456
Joe Perches533574c2012-07-30 14:40:13 -07003457__printf(5, 6)
David Sterbac0d19e22015-04-24 19:11:57 +02003458__cold
Anand Jain34d97002016-03-16 16:43:06 +08003459void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01003460 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08003461
Jeff Mahoneye33e17e2015-06-15 09:41:19 -04003462const char *btrfs_decode_error(int errno);
Joe Perches533574c2012-07-30 14:40:13 -07003463
David Sterbac0d19e22015-04-24 19:11:57 +02003464__cold
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003465void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
Jeff Mahoney66642832016-06-10 18:19:25 -04003466 const char *function,
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003467 unsigned int line, int errno);
3468
Anand Jainc5f4ccb2016-03-16 16:43:08 +08003469/*
3470 * Call btrfs_abort_transaction as early as possible when an error condition is
3471 * detected, that way the exact line number is reported.
3472 */
Jeff Mahoney66642832016-06-10 18:19:25 -04003473#define btrfs_abort_transaction(trans, errno) \
Anand Jainc5f4ccb2016-03-16 16:43:08 +08003474do { \
3475 /* Report first abort since mount */ \
3476 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
Jeff Mahoney66642832016-06-10 18:19:25 -04003477 &((trans)->fs_info->fs_state))) { \
Chris Masone5d6b122016-12-09 05:56:33 -08003478 if ((errno) != -EIO) { \
3479 WARN(1, KERN_DEBUG \
3480 "BTRFS: Transaction aborted (error %d)\n", \
3481 (errno)); \
3482 } else { \
Jeff Mahoney71367b32017-02-15 16:28:34 -05003483 btrfs_debug((trans)->fs_info, \
3484 "Transaction aborted (error %d)", \
Chris Masone5d6b122016-12-09 05:56:33 -08003485 (errno)); \
3486 } \
Anand Jainc5f4ccb2016-03-16 16:43:08 +08003487 } \
Jeff Mahoney66642832016-06-10 18:19:25 -04003488 __btrfs_abort_transaction((trans), __func__, \
Anand Jainc5f4ccb2016-03-16 16:43:08 +08003489 __LINE__, (errno)); \
3490} while (0)
3491
3492#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3493do { \
3494 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3495 (errno), fmt, ##args); \
3496} while (0)
3497
3498__printf(5, 6)
3499__cold
3500void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3501 unsigned int line, int errno, const char *fmt, ...);
3502/*
3503 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3504 * will panic(). Otherwise we BUG() here.
3505 */
3506#define btrfs_panic(fs_info, errno, fmt, args...) \
3507do { \
3508 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3509 BUG(); \
3510} while (0)
3511
3512
3513/* compatibility and incompatibility defines */
3514
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06003515#define btrfs_set_fs_incompat(__fs_info, opt) \
3516 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3517
3518static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3519 u64 flag)
3520{
3521 struct btrfs_super_block *disk_super;
3522 u64 features;
3523
3524 disk_super = fs_info->super_copy;
3525 features = btrfs_super_incompat_flags(disk_super);
3526 if (!(features & flag)) {
Miao Xieceda0862013-04-11 10:30:16 +00003527 spin_lock(&fs_info->super_lock);
3528 features = btrfs_super_incompat_flags(disk_super);
3529 if (!(features & flag)) {
3530 features |= flag;
3531 btrfs_set_super_incompat_flags(disk_super, features);
Frank Holtonefe120a2013-12-20 11:37:06 -05003532 btrfs_info(fs_info, "setting %llu feature flag",
Miao Xieceda0862013-04-11 10:30:16 +00003533 flag);
3534 }
3535 spin_unlock(&fs_info->super_lock);
Mitch Harder2b0ce2c2012-07-24 11:58:43 -06003536 }
3537}
3538
Omar Sandoval1abfbcd2015-09-29 20:50:32 -07003539#define btrfs_clear_fs_incompat(__fs_info, opt) \
3540 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3541
3542static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3543 u64 flag)
3544{
3545 struct btrfs_super_block *disk_super;
3546 u64 features;
3547
3548 disk_super = fs_info->super_copy;
3549 features = btrfs_super_incompat_flags(disk_super);
3550 if (features & flag) {
3551 spin_lock(&fs_info->super_lock);
3552 features = btrfs_super_incompat_flags(disk_super);
3553 if (features & flag) {
3554 features &= ~flag;
3555 btrfs_set_super_incompat_flags(disk_super, features);
3556 btrfs_info(fs_info, "clearing %llu feature flag",
3557 flag);
3558 }
3559 spin_unlock(&fs_info->super_lock);
3560 }
3561}
3562
Josef Bacik3173a182013-03-07 14:22:04 -05003563#define btrfs_fs_incompat(fs_info, opt) \
3564 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3565
Alexandru Moise9780c492015-10-18 21:35:41 +00003566static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
Josef Bacik3173a182013-03-07 14:22:04 -05003567{
3568 struct btrfs_super_block *disk_super;
3569 disk_super = fs_info->super_copy;
3570 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3571}
3572
Omar Sandoval1abfbcd2015-09-29 20:50:32 -07003573#define btrfs_set_fs_compat_ro(__fs_info, opt) \
3574 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3575
3576static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3577 u64 flag)
3578{
3579 struct btrfs_super_block *disk_super;
3580 u64 features;
3581
3582 disk_super = fs_info->super_copy;
3583 features = btrfs_super_compat_ro_flags(disk_super);
3584 if (!(features & flag)) {
3585 spin_lock(&fs_info->super_lock);
3586 features = btrfs_super_compat_ro_flags(disk_super);
3587 if (!(features & flag)) {
3588 features |= flag;
3589 btrfs_set_super_compat_ro_flags(disk_super, features);
3590 btrfs_info(fs_info, "setting %llu ro feature flag",
3591 flag);
3592 }
3593 spin_unlock(&fs_info->super_lock);
3594 }
3595}
3596
3597#define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3598 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3599
3600static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3601 u64 flag)
3602{
3603 struct btrfs_super_block *disk_super;
3604 u64 features;
3605
3606 disk_super = fs_info->super_copy;
3607 features = btrfs_super_compat_ro_flags(disk_super);
3608 if (features & flag) {
3609 spin_lock(&fs_info->super_lock);
3610 features = btrfs_super_compat_ro_flags(disk_super);
3611 if (features & flag) {
3612 features &= ~flag;
3613 btrfs_set_super_compat_ro_flags(disk_super, features);
3614 btrfs_info(fs_info, "clearing %llu ro feature flag",
3615 flag);
3616 }
3617 spin_unlock(&fs_info->super_lock);
3618 }
3619}
3620
3621#define btrfs_fs_compat_ro(fs_info, opt) \
3622 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3623
3624static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3625{
3626 struct btrfs_super_block *disk_super;
3627 disk_super = fs_info->super_copy;
3628 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3629}
3630
Josef Bacik33268ea2008-07-24 12:16:36 -04003631/* acl.c */
Chris Mason0eda2942009-10-13 13:50:18 -04003632#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02003633struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Christoph Hellwig996a7102013-12-20 05:16:43 -08003634int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
Yan, Zhengf34f57a2009-11-12 09:35:27 +00003635int btrfs_init_acl(struct btrfs_trans_handle *trans,
3636 struct inode *inode, struct inode *dir);
Li Zefan9b89d952011-07-14 03:17:39 +00003637#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10003638#define btrfs_get_acl NULL
Christoph Hellwig996a7102013-12-20 05:16:43 -08003639#define btrfs_set_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00003640static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3641 struct inode *inode, struct inode *dir)
3642{
3643 return 0;
3644}
Li Zefan9b89d952011-07-14 03:17:39 +00003645#endif
Josef Bacik0f9dd462008-09-23 13:14:11 -04003646
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003647/* relocation.c */
Jeff Mahoney6bccf3a2016-06-21 21:16:51 -04003648int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04003649int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3650 struct btrfs_root *root);
3651int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3652 struct btrfs_root *root);
3653int btrfs_recover_relocation(struct btrfs_root *root);
3654int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Josef Bacik83d4cfd2013-08-30 15:09:51 -04003655int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3656 struct btrfs_root *root, struct extent_buffer *buf,
3657 struct extent_buffer *cow);
Zhaolei147d2562015-08-06 20:58:11 +08003658void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
Yan, Zheng3fd0a552010-05-16 10:49:59 -04003659 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003660int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Yan, Zheng3fd0a552010-05-16 10:49:59 -04003661 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01003662
3663/* scrub.c */
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01003664int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3665 u64 end, struct btrfs_scrub_progress *progress,
Stefan Behrens63a212a2012-11-05 18:29:28 +01003666 int readonly, int is_dev_replace);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003667void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3668void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +01003669int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3670int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3671 struct btrfs_device *dev);
Jeff Mahoney2ff7e612016-06-22 18:54:24 -04003672int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
Arne Jansena2de7332011-03-08 14:14:00 +01003673 struct btrfs_scrub_progress *progress);
Qu Wenruo0966a7b2017-04-14 08:35:54 +08003674static inline void btrfs_init_full_stripe_locks_tree(
3675 struct btrfs_full_stripe_locks_tree *locks_root)
3676{
3677 locks_root->root = RB_ROOT;
3678 mutex_init(&locks_root->lock);
3679}
Arne Jansena2de7332011-03-08 14:14:00 +01003680
Miao Xiec404e0d2014-01-30 16:46:55 +08003681/* dev-replace.c */
3682void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3683void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
Miao Xie42452152014-11-25 16:39:28 +08003684void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3685
3686static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3687{
3688 btrfs_bio_counter_sub(fs_info, 1);
3689}
Miao Xiec404e0d2014-01-30 16:46:55 +08003690
Arne Jansen7414a032011-05-23 14:33:49 +02003691/* reada.c */
3692struct reada_control {
Jeff Mahoneyc28f1582016-06-22 18:56:44 -04003693 struct btrfs_fs_info *fs_info; /* tree to prefetch */
Arne Jansen7414a032011-05-23 14:33:49 +02003694 struct btrfs_key key_start;
3695 struct btrfs_key key_end; /* exclusive */
3696 atomic_t elems;
3697 struct kref refcnt;
3698 wait_queue_head_t wait;
3699};
3700struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3701 struct btrfs_key *start, struct btrfs_key *end);
3702int btrfs_reada_wait(void *handle);
3703void btrfs_reada_detach(void *handle);
David Sterbad48d71a2017-03-02 19:43:30 +01003704int btree_readahead_hook(struct extent_buffer *eb, int err);
Arne Jansen7414a032011-05-23 14:33:49 +02003705
Jan Schmidt95a06072012-05-29 17:06:54 +02003706static inline int is_fstree(u64 rootid)
3707{
3708 if (rootid == BTRFS_FS_TREE_OBJECTID ||
Qu Wenruoe09fe2d2015-02-27 16:24:23 +08003709 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3710 !btrfs_qgroup_level(rootid)))
Jan Schmidt95a06072012-05-29 17:06:54 +02003711 return 1;
3712 return 0;
3713}
David Sterba210549e2013-02-09 23:38:06 +00003714
3715static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3716{
3717 return signal_pending(current);
3718}
3719
Josef Bacikaaedb552013-10-11 14:44:09 -04003720/* Sanity test specific functions */
3721#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3722void btrfs_test_destroy_inode(struct inode *inode);
3723#endif
David Sterba210549e2013-02-09 23:38:06 +00003724
Jeff Mahoneyf5ee5c92016-06-21 09:52:41 -04003725static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
David Sterbafccb84c2014-09-29 23:53:21 +02003726{
3727#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
Jeff Mahoneyf5ee5c92016-06-21 09:52:41 -04003728 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3729 &fs_info->fs_state)))
David Sterbafccb84c2014-09-29 23:53:21 +02003730 return 1;
3731#endif
3732 return 0;
3733}
Chris Masoneb60cea2007-02-02 09:18:22 -05003734#endif