blob: 2c98b3af6052a25bd7ce5eeb5a0502d2ac1cca8a [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 Mason6da6aba2007-12-18 16:15:09 -050022#include <linux/version.h>
Chris Mason810191f2007-10-15 16:18:55 -040023#include <linux/mm.h>
24#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040025#include <linux/fs.h>
Josef Bacik58176a92007-08-29 15:47:34 -040026#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040027#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040028#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Stefan Schmidtf8b18082011-01-12 10:30:42 +010030#include <linux/kobject.h>
Chris Mason479965d2007-10-15 16:14:27 -040031#include <asm/kmap_types.h>
Chris Masond1310b22008-01-24 16:13:08 -050032#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040033#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040034#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040035
Chris Masone089f052007-03-16 16:20:31 -040036struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040037struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040038struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040039extern struct kmem_cache *btrfs_trans_handle_cachep;
40extern struct kmem_cache *btrfs_transaction_cachep;
41extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040042extern struct kmem_cache *btrfs_path_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040043struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040044
Chris Mason2a7108a2008-12-02 09:58:02 -050045#define BTRFS_MAGIC "_BHRfS_M"
Chris Masoneb60cea2007-02-02 09:18:22 -050046
Chris Mason4008c042009-02-12 14:09:45 -050047#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040048
Yan Zheng5d4f98a2009-06-10 10:45:14 -040049#define BTRFS_COMPAT_EXTENT_TREE_V0
50
Chris Mason5a3f23d2009-03-31 13:27:11 -040051/*
52 * files bigger than this get some pre-flushing when they are added
53 * to the ordered operations list. That way we limit the total
54 * work done by the commit
55 */
56#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
57
Chris Mason0b86a832008-03-24 15:01:56 -040058/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040059#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040060
61/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040062#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040063
Chris Mason0b86a832008-03-24 15:01:56 -040064/*
65 * chunk tree stores translations from logical -> physical block numbering
66 * the super block points to the chunk tree
67 */
Chris Masone085def2008-03-24 15:02:07 -040068#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040069
70/*
71 * stores information about which areas of a given device are in use.
72 * one per device. The tree of tree roots points to the device tree
73 */
Chris Masone085def2008-03-24 15:02:07 -040074#define BTRFS_DEV_TREE_OBJECTID 4ULL
75
76/* one per subvolume, storing files and directories */
77#define BTRFS_FS_TREE_OBJECTID 5ULL
78
79/* directory objectid inside the root tree */
80#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040081
Chris Masond20f7042008-12-08 16:58:54 -050082/* holds checksums of all the data extents */
83#define BTRFS_CSUM_TREE_OBJECTID 7ULL
84
Josef Bacik7b128762008-07-24 12:17:14 -040085/* orhpan objectid for tracking unlinked/truncated files */
86#define BTRFS_ORPHAN_OBJECTID -5ULL
87
Chris Masone02119d2008-09-05 16:13:11 -040088/* does write ahead logging to speed up fsyncs */
89#define BTRFS_TREE_LOG_OBJECTID -6ULL
90#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
91
Zheng Yane4657682008-09-26 10:04:53 -040092/* for space balancing */
93#define BTRFS_TREE_RELOC_OBJECTID -8ULL
94#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
95
Chris Masond20f7042008-12-08 16:58:54 -050096/*
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
99 * for fsyncs
100 */
101#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
102
Josef Bacik0af3d002010-06-21 14:48:16 -0400103/* For storing free space cache */
104#define BTRFS_FREE_SPACE_OBJECTID -11ULL
105
Zheng Yan31840ae2008-09-23 13:14:14 -0400106/* dummy objectid represents multiple objectids */
107#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
108
Chris Mason0b86a832008-03-24 15:01:56 -0400109/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400110 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400111 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500112#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400113#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400114#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400115
Chris Mason0b86a832008-03-24 15:01:56 -0400116
117/*
118 * the device items go into the chunk tree. The key is in the form
119 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
120 */
121#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
122
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400123#define BTRFS_BTREE_INODE_OBJECTID 1
124
125#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
126
Chris Masonfec577f2007-02-26 10:40:21 -0500127/*
Chris Masone20d96d2007-03-22 12:13:20 -0400128 * we can actually store much bigger names, but lets not confuse the rest
129 * of linux
130 */
131#define BTRFS_NAME_LEN 255
132
Chris Masonf254e522007-03-29 15:15:27 -0400133/* 32 bytes in various csum fields */
134#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500135
136/* csum types */
137#define BTRFS_CSUM_TYPE_CRC32 0
138
139static int btrfs_csum_sizes[] = { 4, 0 };
140
Chris Mason509659c2007-05-10 12:36:17 -0400141/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500142#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400143
Chris Masonfabb5682007-06-07 22:13:21 -0400144#define BTRFS_FT_UNKNOWN 0
145#define BTRFS_FT_REG_FILE 1
146#define BTRFS_FT_DIR 2
147#define BTRFS_FT_CHRDEV 3
148#define BTRFS_FT_BLKDEV 4
149#define BTRFS_FT_FIFO 5
150#define BTRFS_FT_SOCK 6
151#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500152#define BTRFS_FT_XATTR 8
153#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400154
Chris Masone20d96d2007-03-22 12:13:20 -0400155/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400156 * The key defines the order in the tree, and so it also defines (optimal)
157 * block layout.
158 *
159 * objectid corresponds to the inode number.
160 *
161 * type tells us things about the object, and is a kind of stream selector.
162 * so for a given inode, keys with type of 1 might refer to the inode data,
163 * type of 2 may point to file data in the btree and type == 3 may point to
164 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500165 *
166 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400167 *
168 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
169 * in cpu native order. Otherwise they are identical and their sizes
170 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500171 */
Chris Masone2fa7222007-03-12 16:22:34 -0400172struct btrfs_disk_key {
173 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400174 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400175 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400176} __attribute__ ((__packed__));
177
178struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500179 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400180 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400181 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500182} __attribute__ ((__packed__));
183
Chris Mason0b86a832008-03-24 15:01:56 -0400184struct btrfs_mapping_tree {
185 struct extent_map_tree map_tree;
186};
187
Chris Masone17cade2008-04-15 15:41:47 -0400188#define BTRFS_UUID_SIZE 16
Chris Mason0b86a832008-03-24 15:01:56 -0400189struct btrfs_dev_item {
190 /* the internal btrfs device id */
191 __le64 devid;
192
193 /* size of the device */
194 __le64 total_bytes;
195
196 /* bytes used */
197 __le64 bytes_used;
198
199 /* optimal io alignment for this device */
200 __le32 io_align;
201
202 /* optimal io width for this device */
203 __le32 io_width;
204
205 /* minimal io size for this device */
206 __le32 sector_size;
207
Chris Mason0b86a832008-03-24 15:01:56 -0400208 /* type and info about this device */
209 __le64 type;
210
Yan Zheng2b820322008-11-17 21:11:30 -0500211 /* expected generation for this device */
212 __le64 generation;
213
Chris Masonc3027eb2008-12-08 16:40:21 -0500214 /*
215 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400216 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500217 */
218 __le64 start_offset;
219
Chris Masone17cade2008-04-15 15:41:47 -0400220 /* grouping information for allocation decisions */
221 __le32 dev_group;
222
223 /* seek speed 0-100 where 100 is fastest */
224 u8 seek_speed;
225
226 /* bandwidth 0-100 where 100 is fastest */
227 u8 bandwidth;
228
Chris Mason0d81ba52008-03-24 15:02:07 -0400229 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400230 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500231
232 /* uuid of FS who owns this device */
233 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400234} __attribute__ ((__packed__));
235
236struct btrfs_stripe {
237 __le64 devid;
238 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400239 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400240} __attribute__ ((__packed__));
241
242struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400243 /* size of this chunk in bytes */
244 __le64 length;
245
246 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400247 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400248
Chris Mason0b86a832008-03-24 15:01:56 -0400249 __le64 stripe_len;
250 __le64 type;
251
252 /* optimal io alignment for this chunk */
253 __le32 io_align;
254
255 /* optimal io width for this chunk */
256 __le32 io_width;
257
258 /* minimal io size for this chunk */
259 __le32 sector_size;
260
261 /* 2^16 stripes is quite a lot, a second limit is the size of a single
262 * item in the btree
263 */
264 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400265
266 /* sub stripes only matter for raid10 */
267 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400268 struct btrfs_stripe stripe;
269 /* additional stripes go here */
270} __attribute__ ((__packed__));
271
Josef Bacik0af3d002010-06-21 14:48:16 -0400272#define BTRFS_FREE_SPACE_EXTENT 1
273#define BTRFS_FREE_SPACE_BITMAP 2
274
275struct btrfs_free_space_entry {
276 __le64 offset;
277 __le64 bytes;
278 u8 type;
279} __attribute__ ((__packed__));
280
281struct btrfs_free_space_header {
282 struct btrfs_disk_key location;
283 __le64 generation;
284 __le64 num_entries;
285 __le64 num_bitmaps;
286} __attribute__ ((__packed__));
287
Chris Mason0b86a832008-03-24 15:01:56 -0400288static inline unsigned long btrfs_chunk_item_size(int num_stripes)
289{
290 BUG_ON(num_stripes == 0);
291 return sizeof(struct btrfs_chunk) +
292 sizeof(struct btrfs_stripe) * (num_stripes - 1);
293}
294
Chris Mason5f39d392007-10-15 16:14:19 -0400295#define BTRFS_FSID_SIZE 16
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400296#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
297#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
liuboacce9522011-01-06 19:30:25 +0800298
299/*
300 * File system states
301 */
302
303/* Errors detected */
304#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
305
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400306#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
307#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
308
309#define BTRFS_BACKREF_REV_MAX 256
310#define BTRFS_BACKREF_REV_SHIFT 56
311#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
312 BTRFS_BACKREF_REV_SHIFT)
313
314#define BTRFS_OLD_BACKREF_REV 0
315#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400316
Chris Masonfec577f2007-02-26 10:40:21 -0500317/*
318 * every tree block (leaf or node) starts with this header.
319 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400320struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400321 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400322 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400323 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400324 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400325 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400326
327 /* allowed to be different from the super from here on down */
328 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400329 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400330 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400331 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400332 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500333} __attribute__ ((__packed__));
334
Chris Mason5f39d392007-10-15 16:14:19 -0400335#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500336 sizeof(struct btrfs_header)) / \
337 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400338#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400339#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454d2007-04-19 13:37:44 -0400340#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
341 sizeof(struct btrfs_item) - \
342 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000343#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
344 sizeof(struct btrfs_item) -\
345 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500346
Chris Mason0b86a832008-03-24 15:01:56 -0400347
348/*
349 * this is a very generous portion of the super block, giving us
350 * room to translate 14 chunks with 3 stripes each.
351 */
352#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400353#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400354
Chris Masonfec577f2007-02-26 10:40:21 -0500355/*
Chris Masonfec577f2007-02-26 10:40:21 -0500356 * the super block basically lists the main trees of the FS
357 * it currently lacks any block count etc etc
358 */
Chris Mason234b63a2007-03-13 10:46:10 -0400359struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400360 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400361 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500362 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400363 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400364 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400365
366 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400367 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400368 __le64 generation;
369 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400370 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400371 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500372
373 /* this will help find the new super based on the log root */
374 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400375 __le64 total_bytes;
376 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400377 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400378 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400379 __le32 sectorsize;
380 __le32 nodesize;
381 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500382 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400383 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400384 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500385 __le64 compat_flags;
386 __le64 compat_ro_flags;
387 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500388 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400389 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400390 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400391 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400392 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500393
Chris Mason7ae9c092008-04-18 10:29:49 -0400394 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500395
Josef Bacik0af3d002010-06-21 14:48:16 -0400396 __le64 cache_generation;
397
Chris Masonc3027eb2008-12-08 16:40:21 -0500398 /* future expansion */
Josef Bacik0af3d002010-06-21 14:48:16 -0400399 __le64 reserved[31];
Chris Mason0b86a832008-03-24 15:01:56 -0400400 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masoncfaa7292007-02-21 17:04:57 -0500401} __attribute__ ((__packed__));
402
Chris Masonfec577f2007-02-26 10:40:21 -0500403/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500404 * Compat flags that we support. If any incompat flags are set other than the
405 * ones specified below then we will fail to mount
406 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400407#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
Josef Bacik0af3d002010-06-21 14:48:16 -0400408#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
Josef Bacik67377732010-09-16 16:19:09 -0400409#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
Li Zefana6fa6fa2010-10-25 15:12:26 +0800410#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400411
412#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
413#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
Josef Bacik0af3d002010-06-21 14:48:16 -0400414#define BTRFS_FEATURE_INCOMPAT_SUPP \
415 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
Josef Bacik67377732010-09-16 16:19:09 -0400416 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800417 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
418 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500419
420/*
Chris Mason62e27492007-03-15 12:56:47 -0400421 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500422 * the item in the leaf (relative to the start of the data area)
423 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400424struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400425 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400426 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400427 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500428} __attribute__ ((__packed__));
429
Chris Masonfec577f2007-02-26 10:40:21 -0500430/*
431 * leaves have an item area and a data area:
432 * [item0, item1....itemN] [free space] [dataN...data1, data0]
433 *
434 * The data is separate from the items to get the keys closer together
435 * during searches.
436 */
Chris Mason234b63a2007-03-13 10:46:10 -0400437struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400438 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400439 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500440} __attribute__ ((__packed__));
441
Chris Masonfec577f2007-02-26 10:40:21 -0500442/*
443 * all non-leaf blocks are nodes, they hold only keys and pointers to
444 * other blocks
445 */
Chris Mason123abc82007-03-14 14:14:43 -0400446struct btrfs_key_ptr {
447 struct btrfs_disk_key key;
448 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500449 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400450} __attribute__ ((__packed__));
451
Chris Mason234b63a2007-03-13 10:46:10 -0400452struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400453 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400454 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500455} __attribute__ ((__packed__));
456
Chris Masonfec577f2007-02-26 10:40:21 -0500457/*
Chris Mason234b63a2007-03-13 10:46:10 -0400458 * btrfs_paths remember the path taken from the root down to the leaf.
459 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500460 * to any other levels that are present.
461 *
462 * The slots array records the index of the item or block pointer
463 * used while walking the tree.
464 */
Chris Mason234b63a2007-03-13 10:46:10 -0400465struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400466 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400467 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400468 /* if there is real range locking, this locks field will change */
469 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400470 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400471 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400472 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500473
474 /*
475 * set by btrfs_split_item, tells search_slot to keep all locks
476 * and to force calls to keep space in the nodes
477 */
Chris Masonb9473432009-03-13 11:00:37 -0400478 unsigned int search_for_split:1;
479 unsigned int keep_locks:1;
480 unsigned int skip_locking:1;
481 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400482 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500483};
Chris Mason5de08d72007-02-24 06:24:44 -0500484
Chris Mason62e27492007-03-15 12:56:47 -0400485/*
486 * items in the extent btree are used to record the objectid of the
487 * owner of the block and the number of references
488 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400489
Chris Mason62e27492007-03-15 12:56:47 -0400490struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400491 __le64 refs;
492 __le64 generation;
493 __le64 flags;
494} __attribute__ ((__packed__));
495
496struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400497 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500498} __attribute__ ((__packed__));
499
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400500#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
501 sizeof(struct btrfs_item))
502
503#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
504#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
505
506/* following flags only apply to tree blocks */
507
508/* use full backrefs for extent pointers in the block */
509#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
510
511struct btrfs_tree_block_info {
512 struct btrfs_disk_key key;
513 u8 level;
514} __attribute__ ((__packed__));
515
516struct btrfs_extent_data_ref {
517 __le64 root;
518 __le64 objectid;
519 __le64 offset;
520 __le32 count;
521} __attribute__ ((__packed__));
522
523struct btrfs_shared_data_ref {
524 __le32 count;
525} __attribute__ ((__packed__));
526
527struct btrfs_extent_inline_ref {
528 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400529 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400530} __attribute__ ((__packed__));
531
532/* old style backrefs item */
533struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500534 __le64 root;
535 __le64 generation;
536 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400537 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400538} __attribute__ ((__packed__));
539
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400540
Chris Mason0b86a832008-03-24 15:01:56 -0400541/* dev extents record free space on individual devices. The owner
542 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400543 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400544 */
545struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400546 __le64 chunk_tree;
547 __le64 chunk_objectid;
548 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400549 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400550 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400551} __attribute__ ((__packed__));
552
Chris Mason39544012007-12-12 14:38:19 -0500553struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400554 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500555 __le16 name_len;
556 /* name goes here */
557} __attribute__ ((__packed__));
558
Chris Mason0b86a832008-03-24 15:01:56 -0400559struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400560 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400561 __le32 nsec;
562} __attribute__ ((__packed__));
563
Jan Engelhardt95029d72009-01-21 10:49:16 -0500564enum btrfs_compression_type {
Li Zefan261507a02010-12-17 14:21:50 +0800565 BTRFS_COMPRESS_NONE = 0,
566 BTRFS_COMPRESS_ZLIB = 1,
Li Zefana6fa6fa2010-10-25 15:12:26 +0800567 BTRFS_COMPRESS_LZO = 2,
568 BTRFS_COMPRESS_TYPES = 2,
569 BTRFS_COMPRESS_LAST = 3,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500570};
Chris Masonc8b97812008-10-29 14:49:59 -0400571
Chris Mason1e1d2702007-03-15 19:03:33 -0400572struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400573 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400574 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400575 /* transid that last touched this inode */
576 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400577 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400578 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400579 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400580 __le32 nlink;
581 __le32 uid;
582 __le32 gid;
583 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400584 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500585 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400586
Chris Masonc3027eb2008-12-08 16:40:21 -0500587 /* modification sequence number for NFS */
588 __le64 sequence;
589
590 /*
591 * a little future expansion, for more than this we can
592 * just grow the inode item and version it
593 */
594 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400595 struct btrfs_timespec atime;
596 struct btrfs_timespec ctime;
597 struct btrfs_timespec mtime;
598 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400599} __attribute__ ((__packed__));
600
Chris Masone02119d2008-09-05 16:13:11 -0400601struct btrfs_dir_log_item {
602 __le64 end;
603} __attribute__ ((__packed__));
604
Chris Mason62e27492007-03-15 12:56:47 -0400605struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400606 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400607 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500608 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400609 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400610 u8 type;
611} __attribute__ ((__packed__));
612
Li Zefanb83cc962010-12-20 16:04:08 +0800613#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
614
Chris Mason62e27492007-03-15 12:56:47 -0400615struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400616 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400617 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400618 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400619 __le64 bytenr;
620 __le64 byte_limit;
621 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400622 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500623 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400624 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400625 struct btrfs_disk_key drop_progress;
626 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400627 u8 level;
Chris Mason9f5fae22007-03-20 14:38:32 -0400628} __attribute__ ((__packed__));
629
Chris Mason0660b5a2008-11-17 20:37:39 -0500630/*
631 * this is used for both forward and backward root refs
632 */
633struct btrfs_root_ref {
634 __le64 dirid;
635 __le64 sequence;
636 __le16 name_len;
637} __attribute__ ((__packed__));
638
Yan Zhengd899e052008-10-30 14:25:28 -0400639#define BTRFS_FILE_EXTENT_INLINE 0
640#define BTRFS_FILE_EXTENT_REG 1
641#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454d2007-04-19 13:37:44 -0400642
Chris Mason9f5fae22007-03-20 14:38:32 -0400643struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400644 /*
645 * transaction id that created this extent
646 */
Chris Mason71951f32007-03-27 09:16:29 -0400647 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400648 /*
649 * max number of bytes to hold this extent in ram
650 * when we split a compressed extent we can't know how big
651 * each of the resulting pieces will be. So, this is
652 * an upper limit on the size of the extent in ram instead of
653 * an exact limit.
654 */
655 __le64 ram_bytes;
656
657 /*
658 * 32 bits for the various ways we might encode the data,
659 * including compression and encryption. If any of these
660 * are set to something a given disk format doesn't understand
661 * it is treated like an incompat flag for reading and writing,
662 * but not for stat.
663 */
664 u8 compression;
665 u8 encryption;
666 __le16 other_encoding; /* spare for later use */
667
668 /* are we inline data or a real extent? */
Chris Mason236454d2007-04-19 13:37:44 -0400669 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400670
Chris Mason9f5fae22007-03-20 14:38:32 -0400671 /*
672 * disk space consumed by the extent, checksum blocks are included
673 * in these numbers
674 */
Chris Masondb945352007-10-15 16:15:53 -0400675 __le64 disk_bytenr;
676 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400677 /*
Chris Masondee26a92007-03-26 16:00:06 -0400678 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400679 * this extent record is for. This allows a file extent to point
680 * into the middle of an existing extent on disk, sharing it
681 * between two snapshots (useful if some bytes in the middle of the
682 * extent have changed
683 */
684 __le64 offset;
685 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400686 * the logical number of file blocks (no csums included). This
687 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400688 */
Chris Masondb945352007-10-15 16:15:53 -0400689 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400690
Chris Mason9f5fae22007-03-20 14:38:32 -0400691} __attribute__ ((__packed__));
692
Chris Masonf254e522007-03-29 15:15:27 -0400693struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400694 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400695} __attribute__ ((__packed__));
696
Chris Mason0b86a832008-03-24 15:01:56 -0400697/* different types of block groups (and chunks) */
698#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
699#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
700#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
Chris Mason593060d2008-03-25 16:50:33 -0400701#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
Chris Mason8790d502008-04-03 16:29:03 -0400702#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
Chris Mason611f0e02008-04-03 16:29:03 -0400703#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
Chris Mason321aecc2008-04-16 10:49:51 -0400704#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
Yan, Zhengb742bb82010-05-16 10:46:24 -0400705#define BTRFS_NR_RAID_TYPES 5
Chris Mason1e2677e2007-05-29 16:52:18 -0400706
Chris Mason9078a3e2007-04-26 16:46:15 -0400707struct btrfs_block_group_item {
708 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -0400709 __le64 chunk_objectid;
710 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -0400711} __attribute__ ((__packed__));
712
Chris Mason6324fbf2008-03-24 15:01:59 -0400713struct btrfs_space_info {
714 u64 flags;
Josef Bacik6a632092009-02-20 11:00:09 -0500715
Josef Bacik89a55892010-10-14 14:52:27 -0400716 u64 total_bytes; /* total bytes in the space,
717 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400718 u64 bytes_used; /* total bytes used,
719 this does't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -0500720 u64 bytes_pinned; /* total bytes pinned, will be freed when the
721 transaction finishes */
722 u64 bytes_reserved; /* total bytes the allocator has reserved for
723 current allocations */
724 u64 bytes_readonly; /* total bytes that are read only */
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400725
Josef Bacik6a632092009-02-20 11:00:09 -0500726 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400727 delalloc/allocations */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400728 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -0400729 u64 disk_total; /* total bytes on disk, takes mirrors into
730 account */
Josef Bacik6a632092009-02-20 11:00:09 -0500731
732 int full; /* indicates that we cannot allocate any more
733 chunks for this space */
734 int force_alloc; /* set if we need to force a chunk alloc for
735 this space */
736
Chris Mason6324fbf2008-03-24 15:01:59 -0400737 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400738
739 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400740 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -0400741 spinlock_t lock;
Josef Bacik80eb2342008-10-29 14:49:05 -0400742 struct rw_semaphore groups_sem;
Josef Bacik817d52f2009-07-13 21:29:25 -0400743 atomic_t caching_threads;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400744};
745
Yan, Zhengf0486c62010-05-16 10:46:25 -0400746struct btrfs_block_rsv {
747 u64 size;
748 u64 reserved;
749 u64 freed[2];
750 struct btrfs_space_info *space_info;
751 struct list_head list;
752 spinlock_t lock;
753 atomic_t usage;
754 unsigned int priority:8;
755 unsigned int durable:1;
756 unsigned int refill_used:1;
757 unsigned int full:1;
758};
759
Chris Masonfa9c0d72009-04-03 09:47:43 -0400760/*
761 * free clusters are used to claim free space in relatively large chunks,
762 * allowing us to do less seeky writes. They are used for all metadata
763 * allocations and data allocations in ssd mode.
764 */
765struct btrfs_free_cluster {
766 spinlock_t lock;
767 spinlock_t refill_lock;
768 struct rb_root root;
769
770 /* largest extent in this cluster */
771 u64 max_size;
772
773 /* first extent starting offset */
774 u64 window_start;
775
Josef Bacik96303082009-07-13 21:29:25 -0400776 /* if this cluster simply points at a bitmap in the block group */
777 bool points_to_bitmap;
778
Chris Masonfa9c0d72009-04-03 09:47:43 -0400779 struct btrfs_block_group_cache *block_group;
780 /*
781 * when a cluster is allocated from a block group, we put the
782 * cluster onto a list in the block group so that it can
783 * be freed before the block group is freed.
784 */
785 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -0400786};
787
Josef Bacik817d52f2009-07-13 21:29:25 -0400788enum btrfs_caching_type {
789 BTRFS_CACHE_NO = 0,
790 BTRFS_CACHE_STARTED = 1,
791 BTRFS_CACHE_FINISHED = 2,
792};
793
Josef Bacik0af3d002010-06-21 14:48:16 -0400794enum btrfs_disk_cache_state {
795 BTRFS_DC_WRITTEN = 0,
796 BTRFS_DC_ERROR = 1,
797 BTRFS_DC_CLEAR = 2,
798 BTRFS_DC_SETUP = 3,
799 BTRFS_DC_NEED_WRITE = 4,
800};
801
Yan Zheng11833d62009-09-11 16:11:19 -0400802struct btrfs_caching_control {
803 struct list_head list;
804 struct mutex mutex;
805 wait_queue_head_t wait;
806 struct btrfs_block_group_cache *block_group;
807 u64 progress;
808 atomic_t count;
809};
810
Chris Mason9078a3e2007-04-26 16:46:15 -0400811struct btrfs_block_group_cache {
812 struct btrfs_key key;
813 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -0400814 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -0400815 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -0400816 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -0500817 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -0400818 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400819 u64 reserved_pinned;
Josef Bacik1b2da372009-09-11 16:11:20 -0400820 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -0400821 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -0400822 u64 sectorsize;
823 int extents_thresh;
824 int free_extents;
825 int total_bitmaps;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +0000826 unsigned int ro:1;
827 unsigned int dirty:1;
828 unsigned int iref:1;
Josef Bacik0af3d002010-06-21 14:48:16 -0400829
830 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400831
Josef Bacik817d52f2009-07-13 21:29:25 -0400832 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -0400833 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -0400834 struct btrfs_caching_control *caching_ctl;
835 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -0400836
Josef Bacik0f9dd462008-09-23 13:14:11 -0400837 struct btrfs_space_info *space_info;
838
839 /* free space cache stuff */
Josef Bacik6226cb02009-04-03 10:14:18 -0400840 spinlock_t tree_lock;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400841 struct rb_root free_space_offset;
Josef Bacik817d52f2009-07-13 21:29:25 -0400842 u64 free_space;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400843
844 /* block group cache stuff */
845 struct rb_node cache_node;
846
847 /* for block groups in the same raid type */
848 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -0500849
850 /* usage count */
851 atomic_t count;
Chris Masonfa9c0d72009-04-03 09:47:43 -0400852
853 /* List of struct btrfs_free_clusters for this block group.
854 * Today it will only have one thing on it, but that may change
855 */
856 struct list_head cluster_list;
Chris Mason9078a3e2007-04-26 16:46:15 -0400857};
Chris Mason0b86a832008-03-24 15:01:56 -0400858
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400859struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -0400860struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400861struct btrfs_fs_devices;
Chris Mason9f5fae22007-03-20 14:38:32 -0400862struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -0400863 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -0400864 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -0400865 struct btrfs_root *extent_root;
866 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -0400867 struct btrfs_root *chunk_root;
868 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -0500869 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -0500870 struct btrfs_root *csum_root;
Chris Masone02119d2008-09-05 16:13:11 -0400871
872 /* the log root tree is a directory of all the other log roots */
873 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400874
875 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -0400876 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -0400877
Josef Bacik0f9dd462008-09-23 13:14:11 -0400878 /* block group cache stuff */
879 spinlock_t block_group_cache_lock;
880 struct rb_root block_group_cache_tree;
881
Yan Zheng11833d62009-09-11 16:11:19 -0400882 struct extent_io_tree freed_extents[2];
883 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -0400884
Chris Mason0b86a832008-03-24 15:01:56 -0400885 /* logical->physical extent mapping */
886 struct btrfs_mapping_tree mapping_tree;
887
Yan, Zhengf0486c62010-05-16 10:46:25 -0400888 /* block reservation for extent, checksum and root tree */
889 struct btrfs_block_rsv global_block_rsv;
890 /* block reservation for delay allocation */
891 struct btrfs_block_rsv delalloc_block_rsv;
892 /* block reservation for metadata operations */
893 struct btrfs_block_rsv trans_block_rsv;
894 /* block reservation for chunk tree */
895 struct btrfs_block_rsv chunk_block_rsv;
896
897 struct btrfs_block_rsv empty_block_rsv;
898
899 /* list of block reservations that cross multiple transactions */
900 struct list_head durable_block_rsv_list;
901
902 struct mutex durable_block_rsv_mutex;
903
Chris Mason293ffd52007-03-20 15:57:25 -0400904 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400905 u64 last_trans_committed;
Chris Mason12fcfd22009-03-24 10:24:20 -0400906
907 /*
908 * this is updated to the current trans every time a full commit
909 * is required instead of the faster short fsync log commits
910 */
911 u64 last_trans_log_full_commit;
Sage Weil9ca9ee02008-08-04 10:41:27 -0400912 u64 open_ioctl_trans;
Li Zefan261507a02010-12-17 14:21:50 +0800913 unsigned long mount_opt:20;
914 unsigned long compress_type:4;
Chris Mason6f568d32008-01-29 16:03:38 -0500915 u64 max_inline;
Chris Mason8f662a72008-01-02 10:01:11 -0500916 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -0400917 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400918 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -0400919 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -0400920 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -0500921 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -0400922
Chris Mason4b52dff2007-06-26 10:06:50 -0400923 struct btrfs_super_block super_copy;
Chris Masona061fc82008-05-07 11:43:44 -0400924 struct btrfs_super_block super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -0400925 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -0400926 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -0400927 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -0400928 struct backing_dev_info bdi;
Chris Mason79154b12007-03-22 15:59:16 -0400929 struct mutex trans_mutex;
Chris Masone02119d2008-09-05 16:13:11 -0400930 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -0400931 struct mutex transaction_kthread_mutex;
932 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -0400933 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -0400934 struct mutex volume_mutex;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400935 /*
936 * this protects the ordered operations list only while we are
937 * processing all of the entries on it. This way we make
938 * sure the commit code doesn't find the list temporarily empty
939 * because another function happens to be doing non-waiting preflush
940 * before jumping into the main commit.
941 */
942 struct mutex ordered_operations_mutex;
Yan Zheng11833d62009-09-11 16:11:19 -0400943 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400944
Yan, Zhengc71bf092009-11-12 09:34:40 +0000945 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400946
Yan, Zhengc71bf092009-11-12 09:34:40 +0000947 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400948 struct srcu_struct subvol_srcu;
949
Chris Mason8fd17792007-04-19 21:01:03 -0400950 struct list_head trans_list;
Chris Mason19c00dd2007-10-15 16:19:22 -0400951 struct list_head hashers;
Chris Masonfacda1e2007-06-08 18:11:48 -0400952 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -0400953 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -0400954
Yan, Zheng24bbcf02009-11-12 09:36:34 +0000955 spinlock_t delayed_iput_lock;
956 struct list_head delayed_iputs;
957
Chris Masoncb03c742008-05-15 16:15:45 -0400958 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -0400959 atomic_t async_submit_draining;
Chris Mason0986fe92008-08-15 15:34:15 -0400960 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -0500961 atomic_t async_delalloc_pages;
Chris Masonce9adaa2008-04-09 16:28:12 -0400962
Chris Mason8b712842008-06-11 16:50:36 -0400963 /*
Chris Mason3eaa2882008-07-24 11:57:52 -0400964 * this is used by the balancing code to wait for all the pending
965 * ordered extents
966 */
967 spinlock_t ordered_extent_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400968
969 /*
970 * all of the data=ordered extents pending writeback
971 * these can span multiple transactions and basically include
972 * every dirty data page that isn't from nodatacow
973 */
Chris Mason3eaa2882008-07-24 11:57:52 -0400974 struct list_head ordered_extents;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400975
976 /*
977 * all of the inodes that have delalloc bytes. It is possible for
978 * this list to be empty even when there is still dirty data=ordered
979 * extents waiting to finish IO.
980 */
Chris Masonea8c2812008-08-04 23:17:27 -0400981 struct list_head delalloc_inodes;
Chris Mason3eaa2882008-07-24 11:57:52 -0400982
983 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -0400984 * special rename and truncate targets that must be on disk before
985 * we're allowed to commit. This is basically the ext3 style
986 * data=ordered list.
987 */
988 struct list_head ordered_operations;
989
990 /*
Chris Mason8b712842008-06-11 16:50:36 -0400991 * there is a pool of worker threads for checksumming during writes
992 * and a pool for checksumming after reads. This is because readers
993 * can run with FS locks held, and the writers may be waiting for
994 * those locks. We don't want ordering in the pending list to cause
995 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -0400996 *
997 * A third pool does submit_bio to avoid deadlocking with the other
998 * two
Chris Mason8b712842008-06-11 16:50:36 -0400999 */
Chris Mason61d92c32009-10-02 19:11:56 -04001000 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -04001001 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -05001002 struct btrfs_workers delalloc_workers;
Chris Mason8b712842008-06-11 16:50:36 -04001003 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -05001004 struct btrfs_workers endio_meta_workers;
Chris Masoncad321a2008-12-17 14:51:42 -05001005 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001006 struct btrfs_workers endio_write_workers;
Josef Bacik0cb59c92010-07-02 12:14:14 -04001007 struct btrfs_workers endio_freespace_worker;
Chris Mason1cc127b2008-06-12 14:46:17 -04001008 struct btrfs_workers submit_workers;
Chris Mason247e7432008-07-17 12:53:51 -04001009 /*
1010 * fixup workers take dirty pages that didn't properly go through
1011 * the cow mechanism and make them safe to write. It happens
1012 * for the sys_munmap function call path
1013 */
1014 struct btrfs_workers fixup_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001015 struct task_struct *transaction_kthread;
1016 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001017 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001018
Josef Bacik58176a92007-08-29 15:47:34 -04001019 struct kobject super_kobj;
1020 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -04001021 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001022 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001023 int log_root_recovering;
Yan, Zhenga22285a2010-05-16 10:48:46 -04001024 int enospc_unlink;
Chris Mason62e27492007-03-15 12:56:47 -04001025
Yan324ae4d2007-11-16 14:57:08 -05001026 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001027
1028 /* protected by the delalloc lock, used to keep from writing
1029 * metadata until there is a nice batch
1030 */
1031 u64 dirty_metadata_bytes;
Chris Mason0b86a832008-03-24 15:01:56 -04001032 struct list_head dirty_cowonly_roots;
1033
Chris Mason8a4b83c2008-03-24 15:02:07 -04001034 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001035
1036 /*
1037 * the space_info list is almost entirely read only. It only changes
1038 * when we add a new raid type to the FS, and that happens
1039 * very rarely. RCU is used to protect it.
1040 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001041 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001042
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001043 struct reloc_control *reloc_ctl;
1044
Chris Mason1832a6d2007-12-21 16:27:21 -05001045 spinlock_t delalloc_lock;
Chris Masoncee36a02008-01-15 08:40:48 -05001046 spinlock_t new_trans_lock;
Chris Mason1832a6d2007-12-21 16:27:21 -05001047 u64 delalloc_bytes;
Chris Masonfa9c0d72009-04-03 09:47:43 -04001048
1049 /* data_alloc_cluster is only used in ssd mode */
1050 struct btrfs_free_cluster data_alloc_cluster;
1051
1052 /* all metadata allocations go through this cluster */
1053 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001054
Yan Zheng31153d82008-07-28 15:32:19 -04001055 spinlock_t ref_cache_lock;
1056 u64 total_ref_cache_size;
Yan Zheng31153d82008-07-28 15:32:19 -04001057
Chris Masond18a2c42008-04-04 15:40:00 -04001058 u64 avail_data_alloc_bits;
1059 u64 avail_metadata_alloc_bits;
1060 u64 avail_system_alloc_bits;
1061 u64 data_alloc_profile;
1062 u64 metadata_alloc_profile;
1063 u64 system_alloc_profile;
Chris Mason788f20e2008-04-28 15:29:42 -04001064
Josef Bacik97e728d2009-04-21 17:40:57 -04001065 unsigned data_chunk_allocations;
1066 unsigned metadata_ratio;
1067
Chris Mason788f20e2008-04-28 15:29:42 -04001068 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001069
1070 /* filesystem state */
1071 u64 fs_state;
Yan324ae4d2007-11-16 14:57:08 -05001072};
Chris Mason0b86a832008-03-24 15:01:56 -04001073
Chris Mason62e27492007-03-15 12:56:47 -04001074/*
1075 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001076 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001077 */
1078struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001079 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001080
1081 /* the node lock is held while changing the node pointer */
1082 spinlock_t node_lock;
1083
Chris Mason5f39d392007-10-15 16:14:19 -04001084 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001085 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001086 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001087
Chris Mason62e27492007-03-15 12:56:47 -04001088 struct btrfs_root_item root_item;
1089 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001090 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001091 struct extent_io_tree dirty_log_pages;
1092
Josef Bacik58176a92007-08-29 15:47:34 -04001093 struct kobject root_kobj;
1094 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001095 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001096
Yan, Zhengf0486c62010-05-16 10:46:25 -04001097 spinlock_t accounting_lock;
1098 struct btrfs_block_rsv *block_rsv;
1099
Chris Masone02119d2008-09-05 16:13:11 -04001100 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001101 wait_queue_head_t log_writer_wait;
1102 wait_queue_head_t log_commit_wait[2];
1103 atomic_t log_writers;
1104 atomic_t log_commit[2];
1105 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001106 unsigned long last_log_commit;
Yan Zheng7237f182009-01-21 12:54:03 -05001107 unsigned long log_batch;
Josef Bacikff782e02009-10-08 15:30:04 -04001108 pid_t log_start_pid;
1109 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001110
Chris Mason0f7d52f2007-04-09 10:42:37 -04001111 u64 objectid;
1112 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001113
1114 /* data allocations are done in sectorsize units */
1115 u32 sectorsize;
1116
1117 /* node allocations are done in nodesize units */
1118 u32 nodesize;
1119
1120 /* leaf allocations are done in leafsize units */
1121 u32 leafsize;
1122
Chris Mason87ee04e2007-11-30 11:30:34 -05001123 u32 stripesize;
1124
Chris Mason9f5fae22007-03-20 14:38:32 -04001125 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001126
1127 u64 highest_objectid;
Chris Mason9f3a7422007-08-07 15:52:19 -04001128 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001129 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001130 int in_radix;
1131
Chris Mason3f157a22008-06-25 16:01:31 -04001132 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001133 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001134 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001135 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001136 char *name;
Chris Mason4313b392008-01-03 09:08:48 -05001137 int in_sysfs;
Chris Mason0b86a832008-03-24 15:01:56 -04001138
1139 /* the dirty list is only used by non-reference counted roots */
1140 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001141
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001142 struct list_head root_list;
1143
Yan, Zhengd68fc572010-05-16 10:49:58 -04001144 spinlock_t orphan_lock;
Josef Bacik7b128762008-07-24 12:17:14 -04001145 struct list_head orphan_list;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001146 struct btrfs_block_rsv *orphan_block_rsv;
1147 int orphan_item_inserted;
1148 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001149
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001150 spinlock_t inode_lock;
1151 /* red-black tree that keeps track of in-memory inodes */
1152 struct rb_root inode_tree;
1153
Chris Mason3394e162008-11-17 20:42:26 -05001154 /*
1155 * right now this just gets used so that a root has its own devid
1156 * for stat. It may be used for more later
1157 */
1158 struct super_block anon_super;
Chris Mason62e27492007-03-15 12:56:47 -04001159};
1160
Chris Mason1e1d2702007-03-15 19:03:33 -04001161/*
1162 * inode items have the data typically returned from stat and store other
1163 * info about object characteristics. There is one for every file and dir in
1164 * the FS
1165 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001166#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001167#define BTRFS_INODE_REF_KEY 12
1168#define BTRFS_XATTR_ITEM_KEY 24
1169#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001170/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001171
1172/*
1173 * dir items are the name -> inode pointers in a directory. There is one
1174 * for every name in a directory.
1175 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001176#define BTRFS_DIR_LOG_ITEM_KEY 60
1177#define BTRFS_DIR_LOG_INDEX_KEY 72
1178#define BTRFS_DIR_ITEM_KEY 84
1179#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001180/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001181 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001182 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001183#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001184
Chris Mason1e1d2702007-03-15 19:03:33 -04001185/*
Chris Masond20f7042008-12-08 16:58:54 -05001186 * extent csums are stored in a separate tree and hold csums for
1187 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001188 */
Chris Masond20f7042008-12-08 16:58:54 -05001189#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001190
1191/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001192 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001193 * tree used by the super block to find all the other trees
1194 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001195#define BTRFS_ROOT_ITEM_KEY 132
1196
1197/*
1198 * root backrefs tie subvols and snapshots to the directory entries that
1199 * reference them
1200 */
1201#define BTRFS_ROOT_BACKREF_KEY 144
1202
1203/*
1204 * root refs make a fast index for listing all of the snapshots and
1205 * subvolumes referenced by a given root. They point directly to the
1206 * directory item in the root that references the subvol
1207 */
1208#define BTRFS_ROOT_REF_KEY 156
1209
Chris Mason1e1d2702007-03-15 19:03:33 -04001210/*
1211 * extent items are in the extent map tree. These record which blocks
1212 * are used, and how many references there are to each block
1213 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001214#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001215
1216#define BTRFS_TREE_BLOCK_REF_KEY 176
1217
1218#define BTRFS_EXTENT_DATA_REF_KEY 178
1219
1220#define BTRFS_EXTENT_REF_V0_KEY 180
1221
1222#define BTRFS_SHARED_BLOCK_REF_KEY 182
1223
1224#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001225
1226/*
1227 * block groups give us hints into the extent allocation trees. Which
1228 * blocks are free etc etc
1229 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001230#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001231
Chris Mason0660b5a2008-11-17 20:37:39 -05001232#define BTRFS_DEV_EXTENT_KEY 204
1233#define BTRFS_DEV_ITEM_KEY 216
1234#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001235
Chris Mason9f5fae22007-03-20 14:38:32 -04001236/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001237 * string items are for debugging. They just store a short string of
1238 * data in the FS
1239 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001240#define BTRFS_STRING_ITEM_KEY 253
1241
Chris Mason21ad10c2008-01-09 09:23:21 -05001242#define BTRFS_MOUNT_NODATASUM (1 << 0)
1243#define BTRFS_MOUNT_NODATACOW (1 << 1)
1244#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001245#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001246#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001247#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001248#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001249#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001250#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001251#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001252#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05001253#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04001254#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04001255#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04001256#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001257
1258#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1259#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1260#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1261 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05001262/*
1263 * Inode flags
1264 */
Yanfdebe2b2008-01-14 13:26:08 -05001265#define BTRFS_INODE_NODATASUM (1 << 0)
1266#define BTRFS_INODE_NODATACOW (1 << 1)
1267#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001268#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001269#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001270#define BTRFS_INODE_SYNC (1 << 5)
1271#define BTRFS_INODE_IMMUTABLE (1 << 6)
1272#define BTRFS_INODE_APPEND (1 << 7)
1273#define BTRFS_INODE_NODUMP (1 << 8)
1274#define BTRFS_INODE_NOATIME (1 << 9)
1275#define BTRFS_INODE_DIRSYNC (1 << 10)
1276
Chris Mason5f39d392007-10-15 16:14:19 -04001277/* some macros to generate set/get funcs for the struct fields. This
1278 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1279 * one for u8:
1280 */
1281#define le8_to_cpu(v) (v)
1282#define cpu_to_le8(v) (v)
1283#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001284
Chris Mason5f39d392007-10-15 16:14:19 -04001285#define read_eb_member(eb, ptr, type, member, result) ( \
1286 read_extent_buffer(eb, (char *)(result), \
1287 ((unsigned long)(ptr)) + \
1288 offsetof(type, member), \
1289 sizeof(((type *)0)->member)))
1290
1291#define write_eb_member(eb, ptr, type, member, result) ( \
1292 write_extent_buffer(eb, (char *)(result), \
1293 ((unsigned long)(ptr)) + \
1294 offsetof(type, member), \
1295 sizeof(((type *)0)->member)))
1296
Chris Mason0f827312007-10-15 16:18:56 -04001297#ifndef BTRFS_SETGET_FUNCS
Chris Mason5f39d392007-10-15 16:14:19 -04001298#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Chris Mason0f827312007-10-15 16:18:56 -04001299u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1300void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1301#endif
Chris Mason9078a3e2007-04-26 16:46:15 -04001302
Chris Mason5f39d392007-10-15 16:14:19 -04001303#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1304static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1305{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001306 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1307 u##bits res = le##bits##_to_cpu(p->member); \
1308 kunmap_atomic(p, KM_USER0); \
Chris Mason810191f2007-10-15 16:18:55 -04001309 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001310} \
1311static inline void btrfs_set_##name(struct extent_buffer *eb, \
1312 u##bits val) \
1313{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001314 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1315 p->member = cpu_to_le##bits(val); \
1316 kunmap_atomic(p, KM_USER0); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001317}
Chris Mason1e1d2702007-03-15 19:03:33 -04001318
Chris Mason5f39d392007-10-15 16:14:19 -04001319#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1320static inline u##bits btrfs_##name(type *s) \
1321{ \
1322 return le##bits##_to_cpu(s->member); \
1323} \
1324static inline void btrfs_set_##name(type *s, u##bits val) \
1325{ \
1326 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001327}
1328
Chris Mason0b86a832008-03-24 15:01:56 -04001329BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1330BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1331BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1332BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1333BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001334BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1335 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001336BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1337BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001338BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1339BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1340BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001341BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001342
Chris Mason8a4b83c2008-03-24 15:02:07 -04001343BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1344BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1345 total_bytes, 64);
1346BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1347 bytes_used, 64);
1348BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1349 io_align, 32);
1350BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1351 io_width, 32);
1352BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1353 sector_size, 32);
1354BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001355BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1356 dev_group, 32);
1357BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1358 seek_speed, 8);
1359BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1360 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001361BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1362 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001363
Chris Mason0b86a832008-03-24 15:01:56 -04001364static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1365{
1366 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1367}
1368
Yan Zheng2b820322008-11-17 21:11:30 -05001369static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1370{
1371 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1372}
1373
Chris Masone17cade2008-04-15 15:41:47 -04001374BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001375BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1376BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1377BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1378BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1379BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1380BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1381BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001382BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001383BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1384BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1385
Chris Masone17cade2008-04-15 15:41:47 -04001386static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1387{
1388 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1389}
1390
1391BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001392BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1393BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1394 stripe_len, 64);
1395BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1396 io_align, 32);
1397BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1398 io_width, 32);
1399BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1400 sector_size, 32);
1401BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1402BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1403 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001404BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1405 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001406BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1407BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1408
1409static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1410 int nr)
1411{
1412 unsigned long offset = (unsigned long)c;
1413 offset += offsetof(struct btrfs_chunk, stripe);
1414 offset += nr * sizeof(struct btrfs_stripe);
1415 return (struct btrfs_stripe *)offset;
1416}
1417
Chris Masona4437552008-04-18 10:29:38 -04001418static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1419{
1420 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1421}
1422
Chris Mason0b86a832008-03-24 15:01:56 -04001423static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1424 struct btrfs_chunk *c, int nr)
1425{
1426 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1427}
1428
1429static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1430 struct btrfs_chunk *c, int nr,
1431 u64 val)
1432{
1433 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1434}
1435
1436static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1437 struct btrfs_chunk *c, int nr)
1438{
1439 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1440}
1441
1442static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1443 struct btrfs_chunk *c, int nr,
1444 u64 val)
1445{
1446 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1447}
1448
Chris Mason5f39d392007-10-15 16:14:19 -04001449/* struct btrfs_block_group_item */
1450BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1451 used, 64);
1452BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1453 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001454BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1455 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001456
1457BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001458 struct btrfs_block_group_item, chunk_objectid, 64);
1459BTRFS_SETGET_FUNCS(disk_block_group_flags,
1460 struct btrfs_block_group_item, flags, 64);
1461BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1462 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001463
Chris Mason39544012007-12-12 14:38:19 -05001464/* struct btrfs_inode_ref */
1465BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001466BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001467
Chris Mason5f39d392007-10-15 16:14:19 -04001468/* struct btrfs_inode_item */
1469BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001470BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001471BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001472BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001473BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001474BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1475BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1476BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1477BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1478BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04001479BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001480BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001481
Chris Mason0b86a832008-03-24 15:01:56 -04001482static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001483btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001484{
Chris Mason5f39d392007-10-15 16:14:19 -04001485 unsigned long ptr = (unsigned long)inode_item;
1486 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04001487 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001488}
1489
Chris Mason0b86a832008-03-24 15:01:56 -04001490static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001491btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001492{
Chris Mason5f39d392007-10-15 16:14:19 -04001493 unsigned long ptr = (unsigned long)inode_item;
1494 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04001495 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001496}
1497
Chris Mason0b86a832008-03-24 15:01:56 -04001498static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001499btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001500{
Chris Mason5f39d392007-10-15 16:14:19 -04001501 unsigned long ptr = (unsigned long)inode_item;
1502 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04001503 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001504}
1505
Chris Mason0b86a832008-03-24 15:01:56 -04001506static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001507btrfs_inode_otime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001508{
Chris Mason5f39d392007-10-15 16:14:19 -04001509 unsigned long ptr = (unsigned long)inode_item;
1510 ptr += offsetof(struct btrfs_inode_item, otime);
Chris Mason0b86a832008-03-24 15:01:56 -04001511 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001512}
1513
Chris Mason0b86a832008-03-24 15:01:56 -04001514BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1515BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001516
Chris Mason0b86a832008-03-24 15:01:56 -04001517/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04001518BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1519 chunk_tree, 64);
1520BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1521 chunk_objectid, 64);
1522BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1523 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001524BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1525
Chris Masone17cade2008-04-15 15:41:47 -04001526static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1527{
1528 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1529 return (u8 *)((unsigned long)dev + ptr);
1530}
1531
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001532BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1533BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1534 generation, 64);
1535BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001536
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001537BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001538
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001539
1540BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1541
1542static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1543 struct btrfs_tree_block_info *item,
1544 struct btrfs_disk_key *key)
1545{
1546 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1547}
1548
1549static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1550 struct btrfs_tree_block_info *item,
1551 struct btrfs_disk_key *key)
1552{
1553 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1554}
1555
1556BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1557 root, 64);
1558BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1559 objectid, 64);
1560BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1561 offset, 64);
1562BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1563 count, 32);
1564
1565BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1566 count, 32);
1567
1568BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1569 type, 8);
1570BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1571 offset, 64);
1572
1573static inline u32 btrfs_extent_inline_ref_size(int type)
1574{
1575 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1576 type == BTRFS_SHARED_BLOCK_REF_KEY)
1577 return sizeof(struct btrfs_extent_inline_ref);
1578 if (type == BTRFS_SHARED_DATA_REF_KEY)
1579 return sizeof(struct btrfs_shared_data_ref) +
1580 sizeof(struct btrfs_extent_inline_ref);
1581 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1582 return sizeof(struct btrfs_extent_data_ref) +
1583 offsetof(struct btrfs_extent_inline_ref, offset);
1584 BUG();
1585 return 0;
1586}
1587
1588BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1589BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1590 generation, 64);
1591BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1592BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001593
1594/* struct btrfs_node */
1595BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001596BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001597
1598static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001599{
Chris Mason5f39d392007-10-15 16:14:19 -04001600 unsigned long ptr;
1601 ptr = offsetof(struct btrfs_node, ptrs) +
1602 sizeof(struct btrfs_key_ptr) * nr;
1603 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001604}
1605
Chris Mason5f39d392007-10-15 16:14:19 -04001606static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1607 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04001608{
Chris Mason5f39d392007-10-15 16:14:19 -04001609 unsigned long ptr;
1610 ptr = offsetof(struct btrfs_node, ptrs) +
1611 sizeof(struct btrfs_key_ptr) * nr;
1612 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04001613}
1614
Chris Mason74493f72007-12-11 09:25:06 -05001615static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1616{
1617 unsigned long ptr;
1618 ptr = offsetof(struct btrfs_node, ptrs) +
1619 sizeof(struct btrfs_key_ptr) * nr;
1620 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1621}
1622
1623static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1624 int nr, u64 val)
1625{
1626 unsigned long ptr;
1627 ptr = offsetof(struct btrfs_node, ptrs) +
1628 sizeof(struct btrfs_key_ptr) * nr;
1629 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1630}
1631
Chris Mason810191f2007-10-15 16:18:55 -04001632static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04001633{
Chris Mason5f39d392007-10-15 16:14:19 -04001634 return offsetof(struct btrfs_node, ptrs) +
1635 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04001636}
1637
Chris Masone644d022007-11-06 15:09:29 -05001638void btrfs_node_key(struct extent_buffer *eb,
1639 struct btrfs_disk_key *disk_key, int nr);
1640
Chris Mason5f39d392007-10-15 16:14:19 -04001641static inline void btrfs_set_node_key(struct extent_buffer *eb,
1642 struct btrfs_disk_key *disk_key, int nr)
1643{
1644 unsigned long ptr;
1645 ptr = btrfs_node_key_ptr_offset(nr);
1646 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1647 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001648}
1649
Chris Mason5f39d392007-10-15 16:14:19 -04001650/* struct btrfs_item */
1651BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1652BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1653
1654static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001655{
Chris Mason5f39d392007-10-15 16:14:19 -04001656 return offsetof(struct btrfs_leaf, items) +
1657 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001658}
1659
Chris Mason5f39d392007-10-15 16:14:19 -04001660static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1661 int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001662{
Chris Mason5f39d392007-10-15 16:14:19 -04001663 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001664}
1665
Chris Mason5f39d392007-10-15 16:14:19 -04001666static inline u32 btrfs_item_end(struct extent_buffer *eb,
1667 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001668{
Chris Mason5f39d392007-10-15 16:14:19 -04001669 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04001670}
1671
Chris Mason5f39d392007-10-15 16:14:19 -04001672static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001673{
Chris Mason5f39d392007-10-15 16:14:19 -04001674 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001675}
1676
Chris Mason5f39d392007-10-15 16:14:19 -04001677static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001678{
Chris Mason5f39d392007-10-15 16:14:19 -04001679 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001680}
1681
Chris Mason5f39d392007-10-15 16:14:19 -04001682static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001683{
Chris Mason5f39d392007-10-15 16:14:19 -04001684 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001685}
1686
Chris Mason5f39d392007-10-15 16:14:19 -04001687static inline void btrfs_item_key(struct extent_buffer *eb,
1688 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001689{
Chris Mason5f39d392007-10-15 16:14:19 -04001690 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1691 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001692}
1693
Chris Mason5f39d392007-10-15 16:14:19 -04001694static inline void btrfs_set_item_key(struct extent_buffer *eb,
1695 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001696{
Chris Mason5f39d392007-10-15 16:14:19 -04001697 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1698 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001699}
1700
Chris Masone02119d2008-09-05 16:13:11 -04001701BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1702
Chris Mason0660b5a2008-11-17 20:37:39 -05001703/*
1704 * struct btrfs_root_ref
1705 */
1706BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1707BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1708BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1709
Chris Mason5f39d392007-10-15 16:14:19 -04001710/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05001711BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04001712BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1713BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04001714BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001715
1716static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1717 struct btrfs_dir_item *item,
1718 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001719{
Chris Mason5f39d392007-10-15 16:14:19 -04001720 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001721}
1722
Chris Mason5f39d392007-10-15 16:14:19 -04001723static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1724 struct btrfs_dir_item *item,
1725 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001726{
Chris Mason5f39d392007-10-15 16:14:19 -04001727 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001728}
1729
Josef Bacik0af3d002010-06-21 14:48:16 -04001730BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1731 num_entries, 64);
1732BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1733 num_bitmaps, 64);
1734BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1735 generation, 64);
1736
1737static inline void btrfs_free_space_key(struct extent_buffer *eb,
1738 struct btrfs_free_space_header *h,
1739 struct btrfs_disk_key *key)
1740{
1741 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1742}
1743
1744static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1745 struct btrfs_free_space_header *h,
1746 struct btrfs_disk_key *key)
1747{
1748 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1749}
1750
Chris Mason5f39d392007-10-15 16:14:19 -04001751/* struct btrfs_disk_key */
1752BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1753 objectid, 64);
1754BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1755BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04001756
Chris Masone2fa7222007-03-12 16:22:34 -04001757static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1758 struct btrfs_disk_key *disk)
1759{
1760 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001761 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001762 cpu->objectid = le64_to_cpu(disk->objectid);
1763}
1764
1765static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1766 struct btrfs_key *cpu)
1767{
1768 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001769 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001770 disk->objectid = cpu_to_le64(cpu->objectid);
1771}
1772
Chris Mason5f39d392007-10-15 16:14:19 -04001773static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1774 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001775{
Chris Mason5f39d392007-10-15 16:14:19 -04001776 struct btrfs_disk_key disk_key;
1777 btrfs_node_key(eb, &disk_key, nr);
1778 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001779}
1780
Chris Mason5f39d392007-10-15 16:14:19 -04001781static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1782 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001783{
Chris Mason5f39d392007-10-15 16:14:19 -04001784 struct btrfs_disk_key disk_key;
1785 btrfs_item_key(eb, &disk_key, nr);
1786 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001787}
1788
Chris Mason5f39d392007-10-15 16:14:19 -04001789static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1790 struct btrfs_dir_item *item,
1791 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001792{
Chris Mason5f39d392007-10-15 16:14:19 -04001793 struct btrfs_disk_key disk_key;
1794 btrfs_dir_item_key(eb, item, &disk_key);
1795 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001796}
1797
Chris Mason5f39d392007-10-15 16:14:19 -04001798
1799static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001800{
Chris Mason5f39d392007-10-15 16:14:19 -04001801 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001802}
1803
Chris Mason5f39d392007-10-15 16:14:19 -04001804static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04001805{
Chris Mason5f39d392007-10-15 16:14:19 -04001806 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04001807}
1808
Chris Mason5f39d392007-10-15 16:14:19 -04001809/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04001810BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001811BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1812 generation, 64);
1813BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1814BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04001815BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001816BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1817
Chris Mason63b10fc2008-04-01 11:21:32 -04001818static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1819{
1820 return (btrfs_header_flags(eb) & flag) == flag;
1821}
1822
1823static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1824{
1825 u64 flags = btrfs_header_flags(eb);
1826 btrfs_set_header_flags(eb, flags | flag);
1827 return (flags & flag) == flag;
1828}
1829
1830static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1831{
1832 u64 flags = btrfs_header_flags(eb);
1833 btrfs_set_header_flags(eb, flags & ~flag);
1834 return (flags & flag) == flag;
1835}
1836
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001837static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1838{
1839 u64 flags = btrfs_header_flags(eb);
1840 return flags >> BTRFS_BACKREF_REV_SHIFT;
1841}
1842
1843static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1844 int rev)
1845{
1846 u64 flags = btrfs_header_flags(eb);
1847 flags &= ~BTRFS_BACKREF_REV_MASK;
1848 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1849 btrfs_set_header_flags(eb, flags);
1850}
1851
Chris Mason5f39d392007-10-15 16:14:19 -04001852static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
Chris Masone2fa7222007-03-12 16:22:34 -04001853{
Chris Mason5f39d392007-10-15 16:14:19 -04001854 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1855 return (u8 *)ptr;
Chris Masone2fa7222007-03-12 16:22:34 -04001856}
1857
Chris Masone17cade2008-04-15 15:41:47 -04001858static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1859{
1860 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1861 return (u8 *)ptr;
1862}
1863
Chris Mason5f39d392007-10-15 16:14:19 -04001864static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001865{
Chris Mason5f39d392007-10-15 16:14:19 -04001866 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1867 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001868}
1869
Chris Mason5f39d392007-10-15 16:14:19 -04001870static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001871{
Chris Mason5f39d392007-10-15 16:14:19 -04001872 unsigned long ptr = offsetof(struct btrfs_header, csum);
1873 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001874}
1875
Chris Mason5f39d392007-10-15 16:14:19 -04001876static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001877{
Chris Mason5f39d392007-10-15 16:14:19 -04001878 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001879}
1880
Chris Mason5f39d392007-10-15 16:14:19 -04001881static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001882{
Chris Mason5f39d392007-10-15 16:14:19 -04001883 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001884}
1885
Chris Mason5f39d392007-10-15 16:14:19 -04001886static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001887{
Chris Mason5f39d392007-10-15 16:14:19 -04001888 return NULL;
Chris Mason7518a232007-03-12 12:01:18 -04001889}
1890
Chris Mason5f39d392007-10-15 16:14:19 -04001891static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001892{
Chris Masond3977122009-01-05 21:25:51 -05001893 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04001894}
1895
Chris Mason5f39d392007-10-15 16:14:19 -04001896/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04001897BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1898 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001899BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04001900BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1901BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001902
Yan Zheng84234f32008-10-29 14:49:05 -04001903BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1904 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001905BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1906BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001907BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1908BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001909BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04001910BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1911BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04001912BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1913 last_snapshot, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001914
Li Zefanb83cc962010-12-20 16:04:08 +08001915static inline bool btrfs_root_readonly(struct btrfs_root *root)
1916{
1917 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1918}
1919
Chris Mason5f39d392007-10-15 16:14:19 -04001920/* struct btrfs_super_block */
Josef Bacik607d4322008-12-02 07:17:45 -05001921
Chris Masondb945352007-10-15 16:15:53 -04001922BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04001923BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001924BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1925 generation, 64);
1926BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001927BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1928 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04001929BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1930 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001931BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1932 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04001933BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1934 chunk_root, 64);
1935BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04001936 chunk_root_level, 8);
1937BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1938 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001939BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1940 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001941BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1942 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04001943BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1944 total_bytes, 64);
1945BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1946 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001947BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1948 sectorsize, 32);
1949BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1950 nodesize, 32);
1951BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1952 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05001953BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1954 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001955BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1956 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001957BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1958 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001959BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1960 compat_flags, 64);
1961BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00001962 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001963BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1964 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05001965BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1966 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04001967BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1968 cache_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05001969
1970static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1971{
1972 int t = btrfs_super_csum_type(s);
1973 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1974 return btrfs_csum_sizes[t];
1975}
Chris Mason5f39d392007-10-15 16:14:19 -04001976
1977static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04001978{
Chris Mason5f39d392007-10-15 16:14:19 -04001979 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04001980}
1981
Chris Mason5f39d392007-10-15 16:14:19 -04001982/* struct btrfs_file_extent_item */
1983BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04001984
Chris Masond3977122009-01-05 21:25:51 -05001985static inline unsigned long
1986btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454d2007-04-19 13:37:44 -04001987{
Chris Mason5f39d392007-10-15 16:14:19 -04001988 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04001989 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04001990 return offset;
Chris Mason236454d2007-04-19 13:37:44 -04001991}
1992
1993static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1994{
Chris Masondb945352007-10-15 16:15:53 -04001995 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454d2007-04-19 13:37:44 -04001996}
1997
Chris Masondb945352007-10-15 16:15:53 -04001998BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1999 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002000BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2001 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002002BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2003 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002004BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2005 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04002006BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2007 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04002008BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2009 ram_bytes, 64);
2010BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2011 compression, 8);
2012BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2013 encryption, 8);
2014BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2015 other_encoding, 16);
2016
2017/* this returns the number of file bytes represented by the inline item.
2018 * If an item is compressed, this is the uncompressed size
2019 */
2020static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2021 struct btrfs_file_extent_item *e)
2022{
2023 return btrfs_file_extent_ram_bytes(eb, e);
2024}
2025
2026/*
2027 * this returns the number of bytes used by the item on disk, minus the
2028 * size of any extent headers. If a file is compressed on disk, this is
2029 * the compressed size
2030 */
2031static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2032 struct btrfs_item *e)
2033{
2034 unsigned long offset;
2035 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2036 return btrfs_item_size(eb, e) - offset;
2037}
Chris Mason9f5fae22007-03-20 14:38:32 -04002038
Chris Masone20d96d2007-03-22 12:13:20 -04002039static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2040{
2041 return sb->s_fs_info;
2042}
2043
Josef Bacik58176a92007-08-29 15:47:34 -04002044static inline int btrfs_set_root_name(struct btrfs_root *root,
2045 const char *name, int len)
2046{
2047 /* if we already have a name just free it */
Chris Masond3977122009-01-05 21:25:51 -05002048 kfree(root->name);
Josef Bacik58176a92007-08-29 15:47:34 -04002049
2050 root->name = kmalloc(len+1, GFP_KERNEL);
2051 if (!root->name)
2052 return -ENOMEM;
2053
2054 memcpy(root->name, name, len);
Chris Masond3977122009-01-05 21:25:51 -05002055 root->name[len] = '\0';
Josef Bacik58176a92007-08-29 15:47:34 -04002056
2057 return 0;
2058}
2059
Chris Masond3977122009-01-05 21:25:51 -05002060static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2061{
Chris Masondb945352007-10-15 16:15:53 -04002062 if (level == 0)
2063 return root->leafsize;
2064 return root->nodesize;
2065}
2066
Chris Mason4beb1b82007-03-14 10:31:29 -04002067/* helper function to cast into the data area of the leaf. */
2068#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04002069 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04002070 btrfs_item_offset_nr(leaf, slot)))
2071
2072#define btrfs_item_ptr_offset(leaf, slot) \
2073 ((unsigned long)(btrfs_leaf_data(leaf) + \
2074 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04002075
Chris Mason2b1f55b2008-09-24 11:48:04 -04002076static inline struct dentry *fdentry(struct file *file)
2077{
Chris Mason6da6aba2007-12-18 16:15:09 -05002078 return file->f_path.dentry;
Chris Mason6da6aba2007-12-18 16:15:09 -05002079}
2080
Josef Bacik67377732010-09-16 16:19:09 -04002081static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2082{
2083 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2084 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2085}
2086
Chris Masonb18c6682007-04-17 13:26:50 -04002087/* extent-tree.c */
Chris Masonfa9c0d72009-04-03 09:47:43 -04002088void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04002089int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2090 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04002091int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002092int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root, u64 bytenr,
2094 u64 num_bytes, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04002095int btrfs_pin_extent(struct btrfs_root *root,
2096 u64 bytenr, u64 num, int reserved);
Chris Masone02119d2008-09-05 16:13:11 -04002097int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2098 struct btrfs_root *root, struct extent_buffer *leaf);
Yan Zheng80ff3852008-10-30 14:20:02 -04002099int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002100 struct btrfs_root *root,
2101 u64 objectid, u64 offset, u64 bytenr);
Chris Masond1310b22008-01-24 16:13:08 -05002102int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
Chris Masond3977122009-01-05 21:25:51 -05002103struct btrfs_block_group_cache *btrfs_lookup_block_group(
2104 struct btrfs_fs_info *info,
2105 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002106void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002107u64 btrfs_find_block_group(struct btrfs_root *root,
2108 u64 search_start, u64 search_hint, int owner);
Chris Mason5f39d392007-10-15 16:14:19 -04002109struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002110 struct btrfs_root *root, u32 blocksize,
2111 u64 parent, u64 root_objectid,
2112 struct btrfs_disk_key *key, int level,
2113 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002114void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2115 struct btrfs_root *root,
2116 struct extent_buffer *buf,
2117 u64 parent, int last_ref);
Chris Mason65b51a02008-08-01 15:11:20 -04002118struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2119 struct btrfs_root *root,
Chris Mason4008c042009-02-12 14:09:45 -05002120 u64 bytenr, u32 blocksize,
2121 int level);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002122int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2123 struct btrfs_root *root,
2124 u64 root_objectid, u64 owner,
2125 u64 offset, struct btrfs_key *ins);
2126int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2127 struct btrfs_root *root,
2128 u64 root_objectid, u64 owner, u64 offset,
2129 struct btrfs_key *ins);
Chris Masone6dcd2d2008-07-17 12:53:50 -04002130int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2131 struct btrfs_root *root,
2132 u64 num_bytes, u64 min_alloc_size,
2133 u64 empty_size, u64 hint_byte,
2134 u64 search_end, struct btrfs_key *ins,
2135 u64 data);
Chris Masone089f052007-03-16 16:20:31 -04002136int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002137 struct extent_buffer *buf, int full_backref);
2138int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2139 struct extent_buffer *buf, int full_backref);
2140int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2141 struct btrfs_root *root,
2142 u64 bytenr, u64 num_bytes, u64 flags,
2143 int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002144int btrfs_free_extent(struct btrfs_trans_handle *trans,
2145 struct btrfs_root *root,
2146 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002147 u64 root_objectid, u64 owner, u64 offset);
2148
Chris Mason65b51a02008-08-01 15:11:20 -04002149int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Yan Zheng11833d62009-09-11 16:11:19 -04002150int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2151 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04002152int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04002153 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04002154int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04002155 struct btrfs_root *root,
2156 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002157 u64 root_objectid, u64 owner, u64 offset);
2158
Chris Mason9078a3e2007-04-26 16:46:15 -04002159int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2160 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002161int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002162int btrfs_free_block_groups(struct btrfs_fs_info *info);
2163int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04002164int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002165int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2166 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04002167 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04002168 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04002169int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2170 struct btrfs_root *root, u64 group_start);
Yan Zheng2b820322008-11-17 21:11:30 -05002171u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
Miao Xie6d07bce2011-01-05 10:07:31 +00002172u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Josef Bacik6a632092009-02-20 11:00:09 -05002173void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
Chris Mason4184ea72009-03-10 12:39:20 -04002174void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002175int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2176void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002177int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
Josef Bacik8bb8ab22010-10-15 16:52:49 -04002179 int num_items);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002180void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2181 struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002182int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2183 struct inode *inode);
2184void btrfs_orphan_release_metadata(struct inode *inode);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002185int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2186 struct btrfs_pending_snapshot *pending);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002187int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2188void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2189int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2190void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002191void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2192struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2193void btrfs_free_block_rsv(struct btrfs_root *root,
2194 struct btrfs_block_rsv *rsv);
2195void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2196 struct btrfs_block_rsv *rsv);
2197int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2198 struct btrfs_root *root,
2199 struct btrfs_block_rsv *block_rsv,
Josef Bacik8bb8ab22010-10-15 16:52:49 -04002200 u64 num_bytes);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002201int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2202 struct btrfs_root *root,
2203 struct btrfs_block_rsv *block_rsv,
2204 u64 min_reserved, int min_factor);
2205int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2206 struct btrfs_block_rsv *dst_rsv,
2207 u64 num_bytes);
2208void btrfs_block_rsv_release(struct btrfs_root *root,
2209 struct btrfs_block_rsv *block_rsv,
2210 u64 num_bytes);
2211int btrfs_set_block_group_ro(struct btrfs_root *root,
2212 struct btrfs_block_group_cache *cache);
2213int btrfs_set_block_group_rw(struct btrfs_root *root,
2214 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04002215void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00002216u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08002217int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2218 u64 start, u64 end);
2219int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2220 u64 num_bytes);
2221
Chris Masondee26a92007-03-26 16:00:06 -04002222/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002223int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2224 int level, int *slot);
2225int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002226int btrfs_previous_item(struct btrfs_root *root,
2227 struct btrfs_path *path, u64 min_objectid,
2228 int type);
Zheng Yan31840ae2008-09-23 13:14:14 -04002229int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2230 struct btrfs_root *root, struct btrfs_path *path,
2231 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002232struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2233struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002234int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002235 struct btrfs_key *key, int lowest_level,
2236 int cache_only, u64 min_trans);
2237int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Chris Masone02119d2008-09-05 16:13:11 -04002238 struct btrfs_key *max_key,
Chris Mason3f157a22008-06-25 16:01:31 -04002239 struct btrfs_path *path, int cache_only,
2240 u64 min_trans);
Chris Mason5f39d392007-10-15 16:14:19 -04002241int btrfs_cow_block(struct btrfs_trans_handle *trans,
2242 struct btrfs_root *root, struct extent_buffer *buf,
2243 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002244 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002245int btrfs_copy_root(struct btrfs_trans_handle *trans,
2246 struct btrfs_root *root,
2247 struct extent_buffer *buf,
2248 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002249int btrfs_block_can_be_shared(struct btrfs_root *root,
2250 struct extent_buffer *buf);
Chris Mason6567e832007-04-16 09:22:45 -04002251int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2252 *root, struct btrfs_path *path, u32 data_size);
Chris Masonb18c6682007-04-17 13:26:50 -04002253int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2254 struct btrfs_root *root,
2255 struct btrfs_path *path,
Chris Mason179e29e2007-11-01 11:28:41 -04002256 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002257int btrfs_split_item(struct btrfs_trans_handle *trans,
2258 struct btrfs_root *root,
2259 struct btrfs_path *path,
2260 struct btrfs_key *new_key,
2261 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002262int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2263 struct btrfs_root *root,
2264 struct btrfs_path *path,
2265 struct btrfs_key *new_key);
Chris Masone089f052007-03-16 16:20:31 -04002266int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2267 *root, struct btrfs_key *key, struct btrfs_path *p, int
2268 ins_len, int cow);
Chris Mason6702ed42007-08-07 16:15:09 -04002269int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002270 struct btrfs_root *root, struct extent_buffer *parent,
Chris Masona6b6e752007-10-15 16:22:39 -04002271 int start_slot, int cache_only, u64 *last_ret,
2272 struct btrfs_key *progress);
Chris Mason234b63a2007-03-13 10:46:10 -04002273void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04002274struct btrfs_path *btrfs_alloc_path(void);
2275void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002276void btrfs_set_path_blocking(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002277void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2278
Chris Mason85e21ba2008-01-29 15:11:36 -05002279int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2280 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05002281static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2282 struct btrfs_root *root,
2283 struct btrfs_path *path)
2284{
2285 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2286}
2287
Chris Masone089f052007-03-16 16:20:31 -04002288int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2289 *root, struct btrfs_key *key, void *data, u32 data_size);
Josef Bacikf3465ca2008-11-12 14:19:50 -05002290int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2291 struct btrfs_root *root,
2292 struct btrfs_path *path,
2293 struct btrfs_key *cpu_key, u32 *data_size,
2294 int nr);
Chris Mason9c583092008-01-29 15:15:18 -05002295int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2296 struct btrfs_root *root,
2297 struct btrfs_path *path,
2298 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2299
2300static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2301 struct btrfs_root *root,
2302 struct btrfs_path *path,
2303 struct btrfs_key *key,
2304 u32 data_size)
2305{
2306 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2307}
2308
Chris Mason234b63a2007-03-13 10:46:10 -04002309int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason7bb86312007-12-11 09:25:06 -05002310int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason5f39d392007-10-15 16:14:19 -04002311int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Yan, Zheng3fd0a552010-05-16 10:49:59 -04002312int btrfs_drop_snapshot(struct btrfs_root *root,
2313 struct btrfs_block_rsv *block_rsv, int update_ref);
Yan Zhengf82d02d2008-10-29 14:49:05 -04002314int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2315 struct btrfs_root *root,
2316 struct extent_buffer *node,
2317 struct extent_buffer *parent);
Chris Masondee26a92007-03-26 16:00:06 -04002318/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05002319int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002320 struct btrfs_path *path,
2321 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05002322int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002324 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2325 const char *name, int name_len);
2326int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2327 struct btrfs_root *tree_root,
2328 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05002329 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04002330int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2331 struct btrfs_key *key);
2332int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2333 *root, struct btrfs_key *key, struct btrfs_root_item
2334 *item);
2335int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2336 *root, struct btrfs_key *key, struct btrfs_root_item
2337 *item);
2338int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2339 btrfs_root_item *item, struct btrfs_key *key);
Chris Masonbf4ef672008-05-08 13:26:18 -04002340int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2341 u64 *found_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002342int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
Yan, Zheng76dda932009-09-21 16:00:26 -04002343int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002344int btrfs_set_root_node(struct btrfs_root_item *item,
2345 struct extent_buffer *node);
Chris Masondee26a92007-03-26 16:00:06 -04002346/* dir-item.c */
Chris Masond3977122009-01-05 21:25:51 -05002347int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2348 struct btrfs_root *root, const char *name,
2349 int name_len, u64 dir,
Josef Bacikaec74772008-07-24 12:12:38 -04002350 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04002351struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root,
2353 struct btrfs_path *path, u64 dir,
2354 const char *name, int name_len,
2355 int mod);
2356struct btrfs_dir_item *
2357btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2358 struct btrfs_root *root,
2359 struct btrfs_path *path, u64 dir,
2360 u64 objectid, const char *name, int name_len,
2361 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002362struct btrfs_dir_item *
2363btrfs_search_dir_index_item(struct btrfs_root *root,
2364 struct btrfs_path *path, u64 dirid,
2365 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002366struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2367 struct btrfs_path *path,
Chris Mason7f5c1512007-03-23 15:56:19 -04002368 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002369int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2370 struct btrfs_root *root,
2371 struct btrfs_path *path,
2372 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05002373int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002374 struct btrfs_root *root,
2375 struct btrfs_path *path, u64 objectid,
2376 const char *name, u16 name_len,
2377 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05002378struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2379 struct btrfs_root *root,
2380 struct btrfs_path *path, u64 dir,
2381 const char *name, u16 name_len,
2382 int mod);
Josef Bacik7b128762008-07-24 12:17:14 -04002383
2384/* orphan.c */
2385int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2386 struct btrfs_root *root, u64 offset);
2387int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002389int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04002390
Chris Masondee26a92007-03-26 16:00:06 -04002391/* inode-map.c */
Chris Mason9f5fae22007-03-20 14:38:32 -04002392int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2393 struct btrfs_root *fs_root,
2394 u64 dirid, u64 *objectid);
Chris Mason5be6f7f2007-04-05 13:35:25 -04002395int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2396
Chris Masondee26a92007-03-26 16:00:06 -04002397/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05002398int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2399 struct btrfs_root *root,
2400 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002401 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05002402int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2403 struct btrfs_root *root,
2404 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002405 u64 inode_objectid, u64 ref_objectid, u64 *index);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002406struct btrfs_inode_ref *
2407btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2408 struct btrfs_root *root,
2409 struct btrfs_path *path,
2410 const char *name, int name_len,
2411 u64 inode_objectid, u64 ref_objectid, int mod);
Chris Mason5f39d392007-10-15 16:14:19 -04002412int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04002415int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04002416 *root, struct btrfs_path *path,
2417 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04002418
2419/* file-item.c */
Chris Mason459931e2008-12-10 09:10:46 -05002420int btrfs_del_csums(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04002422int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002423 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04002424int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2425 struct bio *bio, u64 logical_offset, u32 *dst);
Chris Masonb18c6682007-04-17 13:26:50 -04002426int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04002427 struct btrfs_root *root,
2428 u64 objectid, u64 pos,
2429 u64 disk_offset, u64 disk_num_bytes,
2430 u64 num_bytes, u64 offset, u64 ram_bytes,
2431 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04002432int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root,
2434 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04002435 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05002436int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05002437 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04002438 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04002439int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002440 struct bio *bio, u64 file_start, int contig);
Chris Masonc8b97812008-10-29 14:49:59 -04002441int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2442 u64 start, unsigned long len);
Chris Masonb18c6682007-04-17 13:26:50 -04002443struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2444 struct btrfs_root *root,
2445 struct btrfs_path *path,
Chris Masond20f7042008-12-08 16:58:54 -05002446 u64 bytenr, int cow);
Chris Mason1de037a2007-05-29 15:17:08 -04002447int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2448 struct btrfs_root *root, struct btrfs_path *path,
2449 u64 isize);
Yan Zheng17d217f2008-12-12 10:03:38 -05002450int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2451 u64 end, struct list_head *list);
Chris Mason39279cc2007-06-12 06:35:45 -04002452/* inode.c */
Chris Mason4881ee52008-07-24 09:51:08 -04002453
2454/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04002455#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04002456#define ClearPageChecked ClearPageFsMisc
2457#define SetPageChecked SetPageFsMisc
2458#define PageChecked PageFsMisc
2459#endif
2460
Chris Mason3de45862008-11-17 21:02:50 -05002461struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2462int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04002463int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2464 struct btrfs_root *root,
2465 struct inode *dir, struct inode *inode,
2466 const char *name, int name_len);
2467int btrfs_add_link(struct btrfs_trans_handle *trans,
2468 struct inode *parent_inode, struct inode *inode,
2469 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002470int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 struct inode *dir, u64 objectid,
2473 const char *name, int name_len);
Chris Masone02119d2008-09-05 16:13:11 -04002474int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2475 struct btrfs_root *root,
2476 struct inode *inode, u64 new_size,
2477 u32 min_type);
2478
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002479int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Josef Bacik0019f102010-10-15 15:18:40 -04002480int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
2481 int sync);
Josef Bacik2ac55d42010-02-03 19:33:23 +00002482int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2483 struct extent_state **cached_state);
Chris Masonf4219502008-07-22 11:18:09 -04002484int btrfs_writepages(struct address_space *mapping,
2485 struct writeback_control *wbc);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002486int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Yan, Zheng76dda932009-09-21 16:00:26 -04002487 struct btrfs_root *new_root,
Yan Zhengd2fb3432008-12-11 16:30:39 -05002488 u64 new_dirid, u64 alloc_hint);
Chris Mason239b14b2008-03-24 15:02:07 -04002489int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -04002490 size_t size, struct bio *bio, unsigned long bio_flags);
Chris Mason239b14b2008-03-24 15:02:07 -04002491
Chris Masonedbd8d42007-12-21 16:27:24 -05002492unsigned long btrfs_force_ra(struct address_space *mapping,
2493 struct file_ra_state *ra, struct file *file,
2494 pgoff_t offset, pgoff_t last_index);
Nick Pigginc2ec1752009-03-31 15:23:21 -07002495int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04002496int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04002497void btrfs_evict_inode(struct inode *inode);
Chris Mason2da98f02008-01-16 11:44:43 -05002498void btrfs_put_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01002499int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04002500void btrfs_dirty_inode(struct inode *inode);
2501struct inode *btrfs_alloc_inode(struct super_block *sb);
2502void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04002503int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04002504int btrfs_init_cachep(void);
2505void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04002506long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05302507struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00002508 struct btrfs_root *root, int *was_new);
Chris Mason39279cc2007-06-12 06:35:45 -04002509int btrfs_commit_write(struct file *file, struct page *page,
2510 unsigned from, unsigned to);
Chris Masona52d9a82007-08-27 16:49:44 -04002511struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2512 size_t page_offset, u64 start, u64 end,
2513 int create);
2514int btrfs_update_inode(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root,
2516 struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002517int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2518int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2519void btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002520void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2521 struct btrfs_pending_snapshot *pending,
2522 u64 *bytes_to_reserve);
2523void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2524 struct btrfs_pending_snapshot *pending);
2525void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root);
Yan Zheng9036c102008-10-30 14:19:41 -04002527int btrfs_cont_expand(struct inode *inode, loff_t size);
Yan, Zheng76dda932009-09-21 16:00:26 -04002528int btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002529void btrfs_add_delayed_iput(struct inode *inode);
2530void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04002531int btrfs_prealloc_file_range(struct inode *inode, int mode,
2532 u64 start, u64 num_bytes, u64 min_size,
2533 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04002534int btrfs_prealloc_file_range_trans(struct inode *inode,
2535 struct btrfs_trans_handle *trans, int mode,
2536 u64 start, u64 num_bytes, u64 min_size,
2537 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04002538extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002539
2540/* ioctl.c */
2541long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002542void btrfs_update_iflags(struct inode *inode);
2543void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002544
Chris Mason39279cc2007-06-12 06:35:45 -04002545/* file.c */
Christoph Hellwig7ea80852010-05-26 17:53:25 +02002546int btrfs_sync_file(struct file *file, int datasync);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002547int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2548 int skip_pinned);
Chris Mason5f564062008-01-22 16:47:59 -05002549int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07002550extern const struct file_operations btrfs_file_operations;
Yan, Zheng920bbbf2009-11-12 09:34:08 +00002551int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2552 u64 start, u64 end, u64 *hint_byte, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04002553int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04002554 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04002555int btrfs_release_file(struct inode *inode, struct file *file);
2556
Chris Mason6702ed42007-08-07 16:15:09 -04002557/* tree-defrag.c */
2558int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root, int cache_only);
Josef Bacik58176a92007-08-29 15:47:34 -04002560
2561/* sysfs.c */
2562int btrfs_init_sysfs(void);
2563void btrfs_exit_sysfs(void);
2564int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2565int btrfs_sysfs_add_root(struct btrfs_root *root);
2566void btrfs_sysfs_del_root(struct btrfs_root *root);
2567void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2568
Josef Bacik5103e942007-11-16 11:45:54 -05002569/* xattr.c */
2570ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04002571
Chris Masonedbd8d42007-12-21 16:27:24 -05002572/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04002573int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04002574int btrfs_sync_fs(struct super_block *sb, int wait);
liuboacce9522011-01-06 19:30:25 +08002575void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2576 unsigned int line, int errno);
2577
2578#define btrfs_std_error(fs_info, errno) \
2579do { \
2580 if ((errno)) \
2581 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2582} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04002583
2584/* acl.c */
Chris Mason0eda2942009-10-13 13:50:18 -04002585#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Nick Pigginb74c79e2011-01-07 17:49:58 +11002586int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
Al Viro7df336e2009-06-10 11:36:43 -04002587#else
2588#define btrfs_check_acl NULL
2589#endif
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002590int btrfs_init_acl(struct btrfs_trans_handle *trans,
2591 struct inode *inode, struct inode *dir);
Josef Bacik33268ea2008-07-24 12:16:36 -04002592int btrfs_acl_chmod(struct inode *inode);
Josef Bacik0f9dd462008-09-23 13:14:11 -04002593
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002594/* relocation.c */
2595int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2596int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root);
2598int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root);
2600int btrfs_recover_relocation(struct btrfs_root *root);
2601int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Yan, Zheng3fd0a552010-05-16 10:49:59 -04002602void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2603 struct btrfs_root *root, struct extent_buffer *buf,
2604 struct extent_buffer *cow);
2605void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2606 struct btrfs_pending_snapshot *pending,
2607 u64 *bytes_to_reserve);
2608void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2609 struct btrfs_pending_snapshot *pending);
Chris Masoneb60cea2007-02-02 09:18:22 -05002610#endif