blob: eaf286abad1754f8cbc244cecd2a35c91c3f1abd [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>
Chris Mason479965d2007-10-15 16:14:27 -040030#include <asm/kmap_types.h>
Chris Masond1310b22008-01-24 16:13:08 -050031#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040032#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040033#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040034
Chris Masone089f052007-03-16 16:20:31 -040035struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040036struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040037struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040038extern struct kmem_cache *btrfs_trans_handle_cachep;
39extern struct kmem_cache *btrfs_transaction_cachep;
40extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040041extern struct kmem_cache *btrfs_path_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040042struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040043
Chris Mason2a7108a2008-12-02 09:58:02 -050044#define BTRFS_MAGIC "_BHRfS_M"
Chris Masoneb60cea2007-02-02 09:18:22 -050045
Chris Mason4008c042009-02-12 14:09:45 -050046#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040047
Yan Zheng5d4f98a2009-06-10 10:45:14 -040048#define BTRFS_COMPAT_EXTENT_TREE_V0
49
Chris Mason5a3f23d2009-03-31 13:27:11 -040050/*
51 * files bigger than this get some pre-flushing when they are added
52 * to the ordered operations list. That way we limit the total
53 * work done by the commit
54 */
55#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
56
Chris Mason0b86a832008-03-24 15:01:56 -040057/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040058#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040059
60/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040061#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040062
Chris Mason0b86a832008-03-24 15:01:56 -040063/*
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
66 */
Chris Masone085def2008-03-24 15:02:07 -040067#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040068
69/*
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
72 */
Chris Masone085def2008-03-24 15:02:07 -040073#define BTRFS_DEV_TREE_OBJECTID 4ULL
74
75/* one per subvolume, storing files and directories */
76#define BTRFS_FS_TREE_OBJECTID 5ULL
77
78/* directory objectid inside the root tree */
79#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040080
Chris Masond20f7042008-12-08 16:58:54 -050081/* holds checksums of all the data extents */
82#define BTRFS_CSUM_TREE_OBJECTID 7ULL
83
Josef Bacik7b128762008-07-24 12:17:14 -040084/* orhpan objectid for tracking unlinked/truncated files */
85#define BTRFS_ORPHAN_OBJECTID -5ULL
86
Chris Masone02119d2008-09-05 16:13:11 -040087/* does write ahead logging to speed up fsyncs */
88#define BTRFS_TREE_LOG_OBJECTID -6ULL
89#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
90
Zheng Yane4657682008-09-26 10:04:53 -040091/* for space balancing */
92#define BTRFS_TREE_RELOC_OBJECTID -8ULL
93#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94
Chris Masond20f7042008-12-08 16:58:54 -050095/*
96 * extent checksums all have this objectid
97 * this allows them to share the logging tree
98 * for fsyncs
99 */
100#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
101
Zheng Yan31840ae2008-09-23 13:14:14 -0400102/* dummy objectid represents multiple objectids */
103#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
104
Chris Mason0b86a832008-03-24 15:01:56 -0400105/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400106 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400107 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500108#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400109#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400110#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400111
Chris Mason0b86a832008-03-24 15:01:56 -0400112
113/*
114 * the device items go into the chunk tree. The key is in the form
115 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
116 */
117#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
118
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400119#define BTRFS_BTREE_INODE_OBJECTID 1
120
121#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
122
Chris Masonfec577f2007-02-26 10:40:21 -0500123/*
Chris Masone20d96d2007-03-22 12:13:20 -0400124 * we can actually store much bigger names, but lets not confuse the rest
125 * of linux
126 */
127#define BTRFS_NAME_LEN 255
128
Chris Masonf254e522007-03-29 15:15:27 -0400129/* 32 bytes in various csum fields */
130#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500131
132/* csum types */
133#define BTRFS_CSUM_TYPE_CRC32 0
134
135static int btrfs_csum_sizes[] = { 4, 0 };
136
Chris Mason509659c2007-05-10 12:36:17 -0400137/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500138#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400139
Chris Masonfabb5682007-06-07 22:13:21 -0400140#define BTRFS_FT_UNKNOWN 0
141#define BTRFS_FT_REG_FILE 1
142#define BTRFS_FT_DIR 2
143#define BTRFS_FT_CHRDEV 3
144#define BTRFS_FT_BLKDEV 4
145#define BTRFS_FT_FIFO 5
146#define BTRFS_FT_SOCK 6
147#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500148#define BTRFS_FT_XATTR 8
149#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400150
Chris Masone20d96d2007-03-22 12:13:20 -0400151/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400152 * The key defines the order in the tree, and so it also defines (optimal)
153 * block layout.
154 *
155 * objectid corresponds to the inode number.
156 *
157 * type tells us things about the object, and is a kind of stream selector.
158 * so for a given inode, keys with type of 1 might refer to the inode data,
159 * type of 2 may point to file data in the btree and type == 3 may point to
160 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500161 *
162 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400163 *
164 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
165 * in cpu native order. Otherwise they are identical and their sizes
166 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500167 */
Chris Masone2fa7222007-03-12 16:22:34 -0400168struct btrfs_disk_key {
169 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400170 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400171 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400172} __attribute__ ((__packed__));
173
174struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500175 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400176 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400177 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500178} __attribute__ ((__packed__));
179
Chris Mason0b86a832008-03-24 15:01:56 -0400180struct btrfs_mapping_tree {
181 struct extent_map_tree map_tree;
182};
183
Chris Masone17cade2008-04-15 15:41:47 -0400184#define BTRFS_UUID_SIZE 16
Chris Mason0b86a832008-03-24 15:01:56 -0400185struct btrfs_dev_item {
186 /* the internal btrfs device id */
187 __le64 devid;
188
189 /* size of the device */
190 __le64 total_bytes;
191
192 /* bytes used */
193 __le64 bytes_used;
194
195 /* optimal io alignment for this device */
196 __le32 io_align;
197
198 /* optimal io width for this device */
199 __le32 io_width;
200
201 /* minimal io size for this device */
202 __le32 sector_size;
203
Chris Mason0b86a832008-03-24 15:01:56 -0400204 /* type and info about this device */
205 __le64 type;
206
Yan Zheng2b820322008-11-17 21:11:30 -0500207 /* expected generation for this device */
208 __le64 generation;
209
Chris Masonc3027eb2008-12-08 16:40:21 -0500210 /*
211 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400212 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500213 */
214 __le64 start_offset;
215
Chris Masone17cade2008-04-15 15:41:47 -0400216 /* grouping information for allocation decisions */
217 __le32 dev_group;
218
219 /* seek speed 0-100 where 100 is fastest */
220 u8 seek_speed;
221
222 /* bandwidth 0-100 where 100 is fastest */
223 u8 bandwidth;
224
Chris Mason0d81ba52008-03-24 15:02:07 -0400225 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400226 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500227
228 /* uuid of FS who owns this device */
229 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400230} __attribute__ ((__packed__));
231
232struct btrfs_stripe {
233 __le64 devid;
234 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400235 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400236} __attribute__ ((__packed__));
237
238struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400239 /* size of this chunk in bytes */
240 __le64 length;
241
242 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400243 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400244
Chris Mason0b86a832008-03-24 15:01:56 -0400245 __le64 stripe_len;
246 __le64 type;
247
248 /* optimal io alignment for this chunk */
249 __le32 io_align;
250
251 /* optimal io width for this chunk */
252 __le32 io_width;
253
254 /* minimal io size for this chunk */
255 __le32 sector_size;
256
257 /* 2^16 stripes is quite a lot, a second limit is the size of a single
258 * item in the btree
259 */
260 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400261
262 /* sub stripes only matter for raid10 */
263 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400264 struct btrfs_stripe stripe;
265 /* additional stripes go here */
266} __attribute__ ((__packed__));
267
268static inline unsigned long btrfs_chunk_item_size(int num_stripes)
269{
270 BUG_ON(num_stripes == 0);
271 return sizeof(struct btrfs_chunk) +
272 sizeof(struct btrfs_stripe) * (num_stripes - 1);
273}
274
Chris Mason5f39d392007-10-15 16:14:19 -0400275#define BTRFS_FSID_SIZE 16
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400276#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
277#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
278#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
279#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
280
281#define BTRFS_BACKREF_REV_MAX 256
282#define BTRFS_BACKREF_REV_SHIFT 56
283#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
284 BTRFS_BACKREF_REV_SHIFT)
285
286#define BTRFS_OLD_BACKREF_REV 0
287#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400288
Chris Masonfec577f2007-02-26 10:40:21 -0500289/*
290 * every tree block (leaf or node) starts with this header.
291 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400292struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400293 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400294 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400295 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400296 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400297 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400298
299 /* allowed to be different from the super from here on down */
300 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400301 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400302 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400303 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400304 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500305} __attribute__ ((__packed__));
306
Chris Mason5f39d392007-10-15 16:14:19 -0400307#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500308 sizeof(struct btrfs_header)) / \
309 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400310#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400311#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454df2007-04-19 13:37:44 -0400312#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
313 sizeof(struct btrfs_item) - \
314 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000315#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
316 sizeof(struct btrfs_item) -\
317 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500318
Chris Mason0b86a832008-03-24 15:01:56 -0400319
320/*
321 * this is a very generous portion of the super block, giving us
322 * room to translate 14 chunks with 3 stripes each.
323 */
324#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400325#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400326
Chris Masonfec577f2007-02-26 10:40:21 -0500327/*
Chris Masonfec577f2007-02-26 10:40:21 -0500328 * the super block basically lists the main trees of the FS
329 * it currently lacks any block count etc etc
330 */
Chris Mason234b63a2007-03-13 10:46:10 -0400331struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400332 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400333 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500334 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400335 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400336 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400337
338 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400339 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400340 __le64 generation;
341 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400342 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400343 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500344
345 /* this will help find the new super based on the log root */
346 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400347 __le64 total_bytes;
348 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400349 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400350 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400351 __le32 sectorsize;
352 __le32 nodesize;
353 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500354 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400355 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400356 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500357 __le64 compat_flags;
358 __le64 compat_ro_flags;
359 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500360 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400361 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400362 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400363 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400364 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500365
Chris Mason7ae9c092008-04-18 10:29:49 -0400366 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500367
368 /* future expansion */
369 __le64 reserved[32];
Chris Mason0b86a832008-03-24 15:01:56 -0400370 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masoncfaa7292007-02-21 17:04:57 -0500371} __attribute__ ((__packed__));
372
Chris Masonfec577f2007-02-26 10:40:21 -0500373/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500374 * Compat flags that we support. If any incompat flags are set other than the
375 * ones specified below then we will fail to mount
376 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400377#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
Josef Bacik6ef5ed02009-12-11 21:11:29 +0000378#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0)
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400379
380#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
381#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
382#define BTRFS_FEATURE_INCOMPAT_SUPP \
Josef Bacik6ef5ed02009-12-11 21:11:29 +0000383 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
384 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500385
386/*
Chris Mason62e27492007-03-15 12:56:47 -0400387 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500388 * the item in the leaf (relative to the start of the data area)
389 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400390struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400391 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400392 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400393 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500394} __attribute__ ((__packed__));
395
Chris Masonfec577f2007-02-26 10:40:21 -0500396/*
397 * leaves have an item area and a data area:
398 * [item0, item1....itemN] [free space] [dataN...data1, data0]
399 *
400 * The data is separate from the items to get the keys closer together
401 * during searches.
402 */
Chris Mason234b63a2007-03-13 10:46:10 -0400403struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400404 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400405 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500406} __attribute__ ((__packed__));
407
Chris Masonfec577f2007-02-26 10:40:21 -0500408/*
409 * all non-leaf blocks are nodes, they hold only keys and pointers to
410 * other blocks
411 */
Chris Mason123abc82007-03-14 14:14:43 -0400412struct btrfs_key_ptr {
413 struct btrfs_disk_key key;
414 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500415 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400416} __attribute__ ((__packed__));
417
Chris Mason234b63a2007-03-13 10:46:10 -0400418struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400419 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400420 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500421} __attribute__ ((__packed__));
422
Chris Masonfec577f2007-02-26 10:40:21 -0500423/*
Chris Mason234b63a2007-03-13 10:46:10 -0400424 * btrfs_paths remember the path taken from the root down to the leaf.
425 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500426 * to any other levels that are present.
427 *
428 * The slots array records the index of the item or block pointer
429 * used while walking the tree.
430 */
Chris Mason234b63a2007-03-13 10:46:10 -0400431struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400432 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400433 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400434 /* if there is real range locking, this locks field will change */
435 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400436 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400437 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400438 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500439
440 /*
441 * set by btrfs_split_item, tells search_slot to keep all locks
442 * and to force calls to keep space in the nodes
443 */
Chris Masonb9473432009-03-13 11:00:37 -0400444 unsigned int search_for_split:1;
445 unsigned int keep_locks:1;
446 unsigned int skip_locking:1;
447 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400448 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500449};
Chris Mason5de08d72007-02-24 06:24:44 -0500450
Chris Mason62e27492007-03-15 12:56:47 -0400451/*
452 * items in the extent btree are used to record the objectid of the
453 * owner of the block and the number of references
454 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400455
Chris Mason62e27492007-03-15 12:56:47 -0400456struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400457 __le64 refs;
458 __le64 generation;
459 __le64 flags;
460} __attribute__ ((__packed__));
461
462struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400463 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500464} __attribute__ ((__packed__));
465
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400466#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
467 sizeof(struct btrfs_item))
468
469#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
470#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
471
472/* following flags only apply to tree blocks */
473
474/* use full backrefs for extent pointers in the block */
475#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
476
477struct btrfs_tree_block_info {
478 struct btrfs_disk_key key;
479 u8 level;
480} __attribute__ ((__packed__));
481
482struct btrfs_extent_data_ref {
483 __le64 root;
484 __le64 objectid;
485 __le64 offset;
486 __le32 count;
487} __attribute__ ((__packed__));
488
489struct btrfs_shared_data_ref {
490 __le32 count;
491} __attribute__ ((__packed__));
492
493struct btrfs_extent_inline_ref {
494 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400495 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400496} __attribute__ ((__packed__));
497
498/* old style backrefs item */
499struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500500 __le64 root;
501 __le64 generation;
502 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400503 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400504} __attribute__ ((__packed__));
505
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400506
Chris Mason0b86a832008-03-24 15:01:56 -0400507/* dev extents record free space on individual devices. The owner
508 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400509 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400510 */
511struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400512 __le64 chunk_tree;
513 __le64 chunk_objectid;
514 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400515 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400516 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400517} __attribute__ ((__packed__));
518
Chris Mason39544012007-12-12 14:38:19 -0500519struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400520 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500521 __le16 name_len;
522 /* name goes here */
523} __attribute__ ((__packed__));
524
Chris Mason0b86a832008-03-24 15:01:56 -0400525struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400526 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400527 __le32 nsec;
528} __attribute__ ((__packed__));
529
Jan Engelhardt95029d72009-01-21 10:49:16 -0500530enum btrfs_compression_type {
Chris Masonc8b97812008-10-29 14:49:59 -0400531 BTRFS_COMPRESS_NONE = 0,
532 BTRFS_COMPRESS_ZLIB = 1,
533 BTRFS_COMPRESS_LAST = 2,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500534};
Chris Masonc8b97812008-10-29 14:49:59 -0400535
Chris Mason1e1d2702007-03-15 19:03:33 -0400536struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400537 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400538 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400539 /* transid that last touched this inode */
540 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400541 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400542 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400543 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400544 __le32 nlink;
545 __le32 uid;
546 __le32 gid;
547 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400548 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500549 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400550
Chris Masonc3027eb2008-12-08 16:40:21 -0500551 /* modification sequence number for NFS */
552 __le64 sequence;
553
554 /*
555 * a little future expansion, for more than this we can
556 * just grow the inode item and version it
557 */
558 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400559 struct btrfs_timespec atime;
560 struct btrfs_timespec ctime;
561 struct btrfs_timespec mtime;
562 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400563} __attribute__ ((__packed__));
564
Chris Masone02119d2008-09-05 16:13:11 -0400565struct btrfs_dir_log_item {
566 __le64 end;
567} __attribute__ ((__packed__));
568
Chris Mason62e27492007-03-15 12:56:47 -0400569struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400570 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400571 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500572 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400573 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400574 u8 type;
575} __attribute__ ((__packed__));
576
577struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400578 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400579 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400580 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400581 __le64 bytenr;
582 __le64 byte_limit;
583 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400584 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500585 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400586 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400587 struct btrfs_disk_key drop_progress;
588 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400589 u8 level;
Chris Mason9f5fae22007-03-20 14:38:32 -0400590} __attribute__ ((__packed__));
591
Chris Mason0660b5a2008-11-17 20:37:39 -0500592/*
593 * this is used for both forward and backward root refs
594 */
595struct btrfs_root_ref {
596 __le64 dirid;
597 __le64 sequence;
598 __le16 name_len;
599} __attribute__ ((__packed__));
600
Yan Zhengd899e052008-10-30 14:25:28 -0400601#define BTRFS_FILE_EXTENT_INLINE 0
602#define BTRFS_FILE_EXTENT_REG 1
603#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454df2007-04-19 13:37:44 -0400604
Chris Mason9f5fae22007-03-20 14:38:32 -0400605struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400606 /*
607 * transaction id that created this extent
608 */
Chris Mason71951f32007-03-27 09:16:29 -0400609 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400610 /*
611 * max number of bytes to hold this extent in ram
612 * when we split a compressed extent we can't know how big
613 * each of the resulting pieces will be. So, this is
614 * an upper limit on the size of the extent in ram instead of
615 * an exact limit.
616 */
617 __le64 ram_bytes;
618
619 /*
620 * 32 bits for the various ways we might encode the data,
621 * including compression and encryption. If any of these
622 * are set to something a given disk format doesn't understand
623 * it is treated like an incompat flag for reading and writing,
624 * but not for stat.
625 */
626 u8 compression;
627 u8 encryption;
628 __le16 other_encoding; /* spare for later use */
629
630 /* are we inline data or a real extent? */
Chris Mason236454df2007-04-19 13:37:44 -0400631 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400632
Chris Mason9f5fae22007-03-20 14:38:32 -0400633 /*
634 * disk space consumed by the extent, checksum blocks are included
635 * in these numbers
636 */
Chris Masondb945352007-10-15 16:15:53 -0400637 __le64 disk_bytenr;
638 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400639 /*
Chris Masondee26a92007-03-26 16:00:06 -0400640 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400641 * this extent record is for. This allows a file extent to point
642 * into the middle of an existing extent on disk, sharing it
643 * between two snapshots (useful if some bytes in the middle of the
644 * extent have changed
645 */
646 __le64 offset;
647 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400648 * the logical number of file blocks (no csums included). This
649 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400650 */
Chris Masondb945352007-10-15 16:15:53 -0400651 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400652
Chris Mason9f5fae22007-03-20 14:38:32 -0400653} __attribute__ ((__packed__));
654
Chris Masonf254e522007-03-29 15:15:27 -0400655struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400656 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400657} __attribute__ ((__packed__));
658
Chris Mason0b86a832008-03-24 15:01:56 -0400659/* different types of block groups (and chunks) */
660#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
661#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
662#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
Chris Mason593060d2008-03-25 16:50:33 -0400663#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
Chris Mason8790d502008-04-03 16:29:03 -0400664#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
Chris Mason611f0e02008-04-03 16:29:03 -0400665#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
Chris Mason321aecc2008-04-16 10:49:51 -0400666#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
Yan, Zhengb742bb82010-05-16 10:46:24 -0400667#define BTRFS_NR_RAID_TYPES 5
Chris Mason1e2677e2007-05-29 16:52:18 -0400668
Chris Mason9078a3e2007-04-26 16:46:15 -0400669struct btrfs_block_group_item {
670 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -0400671 __le64 chunk_objectid;
672 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -0400673} __attribute__ ((__packed__));
674
Chris Mason6324fbf2008-03-24 15:01:59 -0400675struct btrfs_space_info {
676 u64 flags;
Josef Bacik6a632092009-02-20 11:00:09 -0500677
678 u64 total_bytes; /* total bytes in the space */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400679 u64 bytes_used; /* total bytes used,
680 this does't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -0500681 u64 bytes_pinned; /* total bytes pinned, will be freed when the
682 transaction finishes */
683 u64 bytes_reserved; /* total bytes the allocator has reserved for
684 current allocations */
685 u64 bytes_readonly; /* total bytes that are read only */
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400686
Josef Bacik6a632092009-02-20 11:00:09 -0500687 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400688 delalloc/allocations */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400689 u64 disk_used; /* total bytes used on disk */
Josef Bacik6a632092009-02-20 11:00:09 -0500690
691 int full; /* indicates that we cannot allocate any more
692 chunks for this space */
693 int force_alloc; /* set if we need to force a chunk alloc for
694 this space */
695
Chris Mason6324fbf2008-03-24 15:01:59 -0400696 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400697
698 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400699 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -0400700 spinlock_t lock;
Josef Bacik80eb2342008-10-29 14:49:05 -0400701 struct rw_semaphore groups_sem;
Josef Bacik817d52f2009-07-13 21:29:25 -0400702 atomic_t caching_threads;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400703};
704
Yan, Zhengf0486c62010-05-16 10:46:25 -0400705struct btrfs_block_rsv {
706 u64 size;
707 u64 reserved;
708 u64 freed[2];
709 struct btrfs_space_info *space_info;
710 struct list_head list;
711 spinlock_t lock;
712 atomic_t usage;
713 unsigned int priority:8;
714 unsigned int durable:1;
715 unsigned int refill_used:1;
716 unsigned int full:1;
717};
718
Chris Masonfa9c0d792009-04-03 09:47:43 -0400719/*
720 * free clusters are used to claim free space in relatively large chunks,
721 * allowing us to do less seeky writes. They are used for all metadata
722 * allocations and data allocations in ssd mode.
723 */
724struct btrfs_free_cluster {
725 spinlock_t lock;
726 spinlock_t refill_lock;
727 struct rb_root root;
728
729 /* largest extent in this cluster */
730 u64 max_size;
731
732 /* first extent starting offset */
733 u64 window_start;
734
Josef Bacik96303082009-07-13 21:29:25 -0400735 /* if this cluster simply points at a bitmap in the block group */
736 bool points_to_bitmap;
737
Chris Masonfa9c0d792009-04-03 09:47:43 -0400738 struct btrfs_block_group_cache *block_group;
739 /*
740 * when a cluster is allocated from a block group, we put the
741 * cluster onto a list in the block group so that it can
742 * be freed before the block group is freed.
743 */
744 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -0400745};
746
Josef Bacik817d52f2009-07-13 21:29:25 -0400747enum btrfs_caching_type {
748 BTRFS_CACHE_NO = 0,
749 BTRFS_CACHE_STARTED = 1,
750 BTRFS_CACHE_FINISHED = 2,
751};
752
Yan Zheng11833d62009-09-11 16:11:19 -0400753struct btrfs_caching_control {
754 struct list_head list;
755 struct mutex mutex;
756 wait_queue_head_t wait;
757 struct btrfs_block_group_cache *block_group;
758 u64 progress;
759 atomic_t count;
760};
761
Chris Mason9078a3e2007-04-26 16:46:15 -0400762struct btrfs_block_group_cache {
763 struct btrfs_key key;
764 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -0400765 struct btrfs_fs_info *fs_info;
Chris Masonc286ac42008-07-22 23:06:41 -0400766 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -0500767 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -0400768 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400769 u64 reserved_pinned;
Josef Bacik1b2da372009-09-11 16:11:20 -0400770 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -0400771 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -0400772 u64 sectorsize;
773 int extents_thresh;
774 int free_extents;
775 int total_bitmaps;
Chris Mason8f18cf12008-04-25 16:53:30 -0400776 int ro;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400777 int dirty;
778
Josef Bacik817d52f2009-07-13 21:29:25 -0400779 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -0400780 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -0400781 struct btrfs_caching_control *caching_ctl;
782 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -0400783
Josef Bacik0f9dd462008-09-23 13:14:11 -0400784 struct btrfs_space_info *space_info;
785
786 /* free space cache stuff */
Josef Bacik6226cb0a2009-04-03 10:14:18 -0400787 spinlock_t tree_lock;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400788 struct rb_root free_space_offset;
Josef Bacik817d52f2009-07-13 21:29:25 -0400789 u64 free_space;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400790
791 /* block group cache stuff */
792 struct rb_node cache_node;
793
794 /* for block groups in the same raid type */
795 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -0500796
797 /* usage count */
798 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -0400799
800 /* List of struct btrfs_free_clusters for this block group.
801 * Today it will only have one thing on it, but that may change
802 */
803 struct list_head cluster_list;
Chris Mason9078a3e2007-04-26 16:46:15 -0400804};
Chris Mason0b86a832008-03-24 15:01:56 -0400805
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400806struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -0400807struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400808struct btrfs_fs_devices;
Chris Mason9f5fae22007-03-20 14:38:32 -0400809struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -0400810 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -0400811 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -0400812 struct btrfs_root *extent_root;
813 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -0400814 struct btrfs_root *chunk_root;
815 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -0500816 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -0500817 struct btrfs_root *csum_root;
Chris Masone02119d2008-09-05 16:13:11 -0400818
819 /* the log root tree is a directory of all the other log roots */
820 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400821
822 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -0400823 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -0400824
Josef Bacik0f9dd462008-09-23 13:14:11 -0400825 /* block group cache stuff */
826 spinlock_t block_group_cache_lock;
827 struct rb_root block_group_cache_tree;
828
Yan Zheng11833d62009-09-11 16:11:19 -0400829 struct extent_io_tree freed_extents[2];
830 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -0400831
Chris Mason0b86a832008-03-24 15:01:56 -0400832 /* logical->physical extent mapping */
833 struct btrfs_mapping_tree mapping_tree;
834
Yan, Zhengf0486c62010-05-16 10:46:25 -0400835 /* block reservation for extent, checksum and root tree */
836 struct btrfs_block_rsv global_block_rsv;
837 /* block reservation for delay allocation */
838 struct btrfs_block_rsv delalloc_block_rsv;
839 /* block reservation for metadata operations */
840 struct btrfs_block_rsv trans_block_rsv;
841 /* block reservation for chunk tree */
842 struct btrfs_block_rsv chunk_block_rsv;
843
844 struct btrfs_block_rsv empty_block_rsv;
845
846 /* list of block reservations that cross multiple transactions */
847 struct list_head durable_block_rsv_list;
848
849 struct mutex durable_block_rsv_mutex;
850
Chris Mason293ffd52007-03-20 15:57:25 -0400851 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400852 u64 last_trans_committed;
Chris Mason12fcfd22009-03-24 10:24:20 -0400853
854 /*
855 * this is updated to the current trans every time a full commit
856 * is required instead of the faster short fsync log commits
857 */
858 u64 last_trans_log_full_commit;
Sage Weil9ca9ee02008-08-04 10:41:27 -0400859 u64 open_ioctl_trans;
Chris Masonb6cda9b2007-12-14 15:30:32 -0500860 unsigned long mount_opt;
Chris Mason6f568d32008-01-29 16:03:38 -0500861 u64 max_inline;
Chris Mason8f662a72008-01-02 10:01:11 -0500862 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -0400863 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400864 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -0400865 wait_queue_head_t transaction_wait;
Chris Mason771ed682008-11-06 22:02:51 -0500866 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -0400867
Chris Mason4b52dff2007-06-26 10:06:50 -0400868 struct btrfs_super_block super_copy;
Chris Masona061fc82008-05-07 11:43:44 -0400869 struct btrfs_super_block super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -0400870 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -0400871 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -0400872 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -0400873 struct backing_dev_info bdi;
Chris Mason79154b12007-03-22 15:59:16 -0400874 struct mutex trans_mutex;
Chris Masone02119d2008-09-05 16:13:11 -0400875 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -0400876 struct mutex transaction_kthread_mutex;
877 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -0400878 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -0400879 struct mutex volume_mutex;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400880 /*
881 * this protects the ordered operations list only while we are
882 * processing all of the entries on it. This way we make
883 * sure the commit code doesn't find the list temporarily empty
884 * because another function happens to be doing non-waiting preflush
885 * before jumping into the main commit.
886 */
887 struct mutex ordered_operations_mutex;
Yan Zheng11833d62009-09-11 16:11:19 -0400888 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400889
Yan, Zhengc71bf092009-11-12 09:34:40 +0000890 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400891
Yan, Zhengc71bf092009-11-12 09:34:40 +0000892 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400893 struct srcu_struct subvol_srcu;
894
Chris Mason8fd17792007-04-19 21:01:03 -0400895 struct list_head trans_list;
Chris Mason19c00dd2007-10-15 16:19:22 -0400896 struct list_head hashers;
Chris Masonfacda1e2007-06-08 18:11:48 -0400897 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -0400898 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -0400899
Yan, Zheng24bbcf02009-11-12 09:36:34 +0000900 spinlock_t delayed_iput_lock;
901 struct list_head delayed_iputs;
902
Chris Masoncb03c742008-05-15 16:15:45 -0400903 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -0400904 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -0400905 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -0500906 atomic_t async_delalloc_pages;
Chris Masonce9adaa2008-04-09 16:28:12 -0400907
Chris Mason8b712842008-06-11 16:50:36 -0400908 /*
Chris Mason3eaa2882008-07-24 11:57:52 -0400909 * this is used by the balancing code to wait for all the pending
910 * ordered extents
911 */
912 spinlock_t ordered_extent_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400913
914 /*
915 * all of the data=ordered extents pending writeback
916 * these can span multiple transactions and basically include
917 * every dirty data page that isn't from nodatacow
918 */
Chris Mason3eaa2882008-07-24 11:57:52 -0400919 struct list_head ordered_extents;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400920
921 /*
922 * all of the inodes that have delalloc bytes. It is possible for
923 * this list to be empty even when there is still dirty data=ordered
924 * extents waiting to finish IO.
925 */
Chris Masonea8c2812008-08-04 23:17:27 -0400926 struct list_head delalloc_inodes;
Chris Mason3eaa2882008-07-24 11:57:52 -0400927
928 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -0400929 * special rename and truncate targets that must be on disk before
930 * we're allowed to commit. This is basically the ext3 style
931 * data=ordered list.
932 */
933 struct list_head ordered_operations;
934
935 /*
Chris Mason8b712842008-06-11 16:50:36 -0400936 * there is a pool of worker threads for checksumming during writes
937 * and a pool for checksumming after reads. This is because readers
938 * can run with FS locks held, and the writers may be waiting for
939 * those locks. We don't want ordering in the pending list to cause
940 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -0400941 *
942 * A third pool does submit_bio to avoid deadlocking with the other
943 * two
Chris Mason8b712842008-06-11 16:50:36 -0400944 */
Chris Mason61d92c32009-10-02 19:11:56 -0400945 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -0400946 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -0500947 struct btrfs_workers delalloc_workers;
Chris Mason8b712842008-06-11 16:50:36 -0400948 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -0500949 struct btrfs_workers endio_meta_workers;
Chris Masoncad321a2008-12-17 14:51:42 -0500950 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400951 struct btrfs_workers endio_write_workers;
Chris Mason1cc127b2008-06-12 14:46:17 -0400952 struct btrfs_workers submit_workers;
Chris Mason247e7432008-07-17 12:53:51 -0400953 /*
954 * fixup workers take dirty pages that didn't properly go through
955 * the cow mechanism and make them safe to write. It happens
956 * for the sys_munmap function call path
957 */
958 struct btrfs_workers fixup_workers;
Chris Masona74a4b92008-06-25 16:01:31 -0400959 struct task_struct *transaction_kthread;
960 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -0400961 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -0400962
Josef Bacik58176a92007-08-29 15:47:34 -0400963 struct kobject super_kobj;
964 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -0400965 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -0400966 int closing;
Chris Masone02119d2008-09-05 16:13:11 -0400967 int log_root_recovering;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400968 int enospc_unlink;
Chris Mason62e27492007-03-15 12:56:47 -0400969
Yan324ae4d2007-11-16 14:57:08 -0500970 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -0400971
972 /* protected by the delalloc lock, used to keep from writing
973 * metadata until there is a nice batch
974 */
975 u64 dirty_metadata_bytes;
Chris Mason0b86a832008-03-24 15:01:56 -0400976 struct list_head dirty_cowonly_roots;
977
Chris Mason8a4b83c2008-03-24 15:02:07 -0400978 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -0400979
980 /*
981 * the space_info list is almost entirely read only. It only changes
982 * when we add a new raid type to the FS, and that happens
983 * very rarely. RCU is used to protect it.
984 */
Chris Mason6324fbf2008-03-24 15:01:59 -0400985 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -0400986
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400987 struct reloc_control *reloc_ctl;
988
Chris Mason1832a6d2007-12-21 16:27:21 -0500989 spinlock_t delalloc_lock;
Chris Masoncee36a02008-01-15 08:40:48 -0500990 spinlock_t new_trans_lock;
Chris Mason1832a6d2007-12-21 16:27:21 -0500991 u64 delalloc_bytes;
Chris Masonfa9c0d792009-04-03 09:47:43 -0400992
993 /* data_alloc_cluster is only used in ssd mode */
994 struct btrfs_free_cluster data_alloc_cluster;
995
996 /* all metadata allocations go through this cluster */
997 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -0400998
Yan Zheng31153d82008-07-28 15:32:19 -0400999 spinlock_t ref_cache_lock;
1000 u64 total_ref_cache_size;
Yan Zheng31153d82008-07-28 15:32:19 -04001001
Chris Masond18a2c42008-04-04 15:40:00 -04001002 u64 avail_data_alloc_bits;
1003 u64 avail_metadata_alloc_bits;
1004 u64 avail_system_alloc_bits;
1005 u64 data_alloc_profile;
1006 u64 metadata_alloc_profile;
1007 u64 system_alloc_profile;
Chris Mason788f20e2008-04-28 15:29:42 -04001008
Josef Bacik97e728d2009-04-21 17:40:57 -04001009 unsigned data_chunk_allocations;
1010 unsigned metadata_ratio;
1011
Chris Mason788f20e2008-04-28 15:29:42 -04001012 void *bdev_holder;
Yan324ae4d2007-11-16 14:57:08 -05001013};
Chris Mason0b86a832008-03-24 15:01:56 -04001014
Chris Mason62e27492007-03-15 12:56:47 -04001015/*
1016 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001017 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001018 */
1019struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001020 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001021
1022 /* the node lock is held while changing the node pointer */
1023 spinlock_t node_lock;
1024
Chris Mason5f39d392007-10-15 16:14:19 -04001025 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001026 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001027 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001028
Chris Mason62e27492007-03-15 12:56:47 -04001029 struct btrfs_root_item root_item;
1030 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001031 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001032 struct extent_io_tree dirty_log_pages;
1033
Josef Bacik58176a92007-08-29 15:47:34 -04001034 struct kobject root_kobj;
1035 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001036 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001037
Yan, Zhengf0486c62010-05-16 10:46:25 -04001038 spinlock_t accounting_lock;
1039 struct btrfs_block_rsv *block_rsv;
1040
Chris Masone02119d2008-09-05 16:13:11 -04001041 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001042 wait_queue_head_t log_writer_wait;
1043 wait_queue_head_t log_commit_wait[2];
1044 atomic_t log_writers;
1045 atomic_t log_commit[2];
1046 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001047 unsigned long last_log_commit;
Yan Zheng7237f182009-01-21 12:54:03 -05001048 unsigned long log_batch;
Josef Bacikff782e02009-10-08 15:30:04 -04001049 pid_t log_start_pid;
1050 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001051
Chris Mason0f7d52f2007-04-09 10:42:37 -04001052 u64 objectid;
1053 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001054
1055 /* data allocations are done in sectorsize units */
1056 u32 sectorsize;
1057
1058 /* node allocations are done in nodesize units */
1059 u32 nodesize;
1060
1061 /* leaf allocations are done in leafsize units */
1062 u32 leafsize;
1063
Chris Mason87ee04e2007-11-30 11:30:34 -05001064 u32 stripesize;
1065
Chris Mason9f5fae22007-03-20 14:38:32 -04001066 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001067
1068 u64 highest_objectid;
Chris Mason9f3a7422007-08-07 15:52:19 -04001069 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001070 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001071 int in_radix;
1072
Chris Mason3f157a22008-06-25 16:01:31 -04001073 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001074 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001075 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001076 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001077 char *name;
Chris Mason4313b392008-01-03 09:08:48 -05001078 int in_sysfs;
Chris Mason0b86a832008-03-24 15:01:56 -04001079
1080 /* the dirty list is only used by non-reference counted roots */
1081 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001082
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001083 struct list_head root_list;
1084
Yan, Zhengd68fc572010-05-16 10:49:58 -04001085 spinlock_t orphan_lock;
Josef Bacik7b128762008-07-24 12:17:14 -04001086 struct list_head orphan_list;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001087 struct btrfs_block_rsv *orphan_block_rsv;
1088 int orphan_item_inserted;
1089 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001090
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001091 spinlock_t inode_lock;
1092 /* red-black tree that keeps track of in-memory inodes */
1093 struct rb_root inode_tree;
1094
Chris Mason3394e162008-11-17 20:42:26 -05001095 /*
1096 * right now this just gets used so that a root has its own devid
1097 * for stat. It may be used for more later
1098 */
1099 struct super_block anon_super;
Chris Mason62e27492007-03-15 12:56:47 -04001100};
1101
Chris Mason1e1d2702007-03-15 19:03:33 -04001102/*
1103 * inode items have the data typically returned from stat and store other
1104 * info about object characteristics. There is one for every file and dir in
1105 * the FS
1106 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001107#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001108#define BTRFS_INODE_REF_KEY 12
1109#define BTRFS_XATTR_ITEM_KEY 24
1110#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001111/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001112
1113/*
1114 * dir items are the name -> inode pointers in a directory. There is one
1115 * for every name in a directory.
1116 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001117#define BTRFS_DIR_LOG_ITEM_KEY 60
1118#define BTRFS_DIR_LOG_INDEX_KEY 72
1119#define BTRFS_DIR_ITEM_KEY 84
1120#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001121/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001122 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001123 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001124#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001125
Chris Mason1e1d2702007-03-15 19:03:33 -04001126/*
Chris Masond20f7042008-12-08 16:58:54 -05001127 * extent csums are stored in a separate tree and hold csums for
1128 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001129 */
Chris Masond20f7042008-12-08 16:58:54 -05001130#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001131
1132/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001133 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001134 * tree used by the super block to find all the other trees
1135 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001136#define BTRFS_ROOT_ITEM_KEY 132
1137
1138/*
1139 * root backrefs tie subvols and snapshots to the directory entries that
1140 * reference them
1141 */
1142#define BTRFS_ROOT_BACKREF_KEY 144
1143
1144/*
1145 * root refs make a fast index for listing all of the snapshots and
1146 * subvolumes referenced by a given root. They point directly to the
1147 * directory item in the root that references the subvol
1148 */
1149#define BTRFS_ROOT_REF_KEY 156
1150
Chris Mason1e1d2702007-03-15 19:03:33 -04001151/*
1152 * extent items are in the extent map tree. These record which blocks
1153 * are used, and how many references there are to each block
1154 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001155#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001156
1157#define BTRFS_TREE_BLOCK_REF_KEY 176
1158
1159#define BTRFS_EXTENT_DATA_REF_KEY 178
1160
1161#define BTRFS_EXTENT_REF_V0_KEY 180
1162
1163#define BTRFS_SHARED_BLOCK_REF_KEY 182
1164
1165#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001166
1167/*
1168 * block groups give us hints into the extent allocation trees. Which
1169 * blocks are free etc etc
1170 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001171#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001172
Chris Mason0660b5a2008-11-17 20:37:39 -05001173#define BTRFS_DEV_EXTENT_KEY 204
1174#define BTRFS_DEV_ITEM_KEY 216
1175#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001176
Chris Mason9f5fae22007-03-20 14:38:32 -04001177/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001178 * string items are for debugging. They just store a short string of
1179 * data in the FS
1180 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001181#define BTRFS_STRING_ITEM_KEY 253
1182
Chris Mason21ad10c2008-01-09 09:23:21 -05001183#define BTRFS_MOUNT_NODATASUM (1 << 0)
1184#define BTRFS_MOUNT_NODATACOW (1 << 1)
1185#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001186#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001187#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001188#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001189#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001190#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001191#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001192#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001193#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05001194#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001195
1196#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1197#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1198#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1199 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05001200/*
1201 * Inode flags
1202 */
Yanfdebe2b2008-01-14 13:26:08 -05001203#define BTRFS_INODE_NODATASUM (1 << 0)
1204#define BTRFS_INODE_NODATACOW (1 << 1)
1205#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001206#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001207#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001208#define BTRFS_INODE_SYNC (1 << 5)
1209#define BTRFS_INODE_IMMUTABLE (1 << 6)
1210#define BTRFS_INODE_APPEND (1 << 7)
1211#define BTRFS_INODE_NODUMP (1 << 8)
1212#define BTRFS_INODE_NOATIME (1 << 9)
1213#define BTRFS_INODE_DIRSYNC (1 << 10)
1214
Chris Mason5f39d392007-10-15 16:14:19 -04001215/* some macros to generate set/get funcs for the struct fields. This
1216 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1217 * one for u8:
1218 */
1219#define le8_to_cpu(v) (v)
1220#define cpu_to_le8(v) (v)
1221#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001222
Chris Mason5f39d392007-10-15 16:14:19 -04001223#define read_eb_member(eb, ptr, type, member, result) ( \
1224 read_extent_buffer(eb, (char *)(result), \
1225 ((unsigned long)(ptr)) + \
1226 offsetof(type, member), \
1227 sizeof(((type *)0)->member)))
1228
1229#define write_eb_member(eb, ptr, type, member, result) ( \
1230 write_extent_buffer(eb, (char *)(result), \
1231 ((unsigned long)(ptr)) + \
1232 offsetof(type, member), \
1233 sizeof(((type *)0)->member)))
1234
Chris Mason0f827312007-10-15 16:18:56 -04001235#ifndef BTRFS_SETGET_FUNCS
Chris Mason5f39d392007-10-15 16:14:19 -04001236#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Chris Mason0f827312007-10-15 16:18:56 -04001237u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1238void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1239#endif
Chris Mason9078a3e2007-04-26 16:46:15 -04001240
Chris Mason5f39d392007-10-15 16:14:19 -04001241#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1242static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1243{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001244 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1245 u##bits res = le##bits##_to_cpu(p->member); \
1246 kunmap_atomic(p, KM_USER0); \
Chris Mason810191f2007-10-15 16:18:55 -04001247 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001248} \
1249static inline void btrfs_set_##name(struct extent_buffer *eb, \
1250 u##bits val) \
1251{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001252 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1253 p->member = cpu_to_le##bits(val); \
1254 kunmap_atomic(p, KM_USER0); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001255}
Chris Mason1e1d2702007-03-15 19:03:33 -04001256
Chris Mason5f39d392007-10-15 16:14:19 -04001257#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1258static inline u##bits btrfs_##name(type *s) \
1259{ \
1260 return le##bits##_to_cpu(s->member); \
1261} \
1262static inline void btrfs_set_##name(type *s, u##bits val) \
1263{ \
1264 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001265}
1266
Chris Mason0b86a832008-03-24 15:01:56 -04001267BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1268BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1269BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1270BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1271BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001272BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1273 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001274BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1275BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001276BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1277BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1278BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001279BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001280
Chris Mason8a4b83c2008-03-24 15:02:07 -04001281BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1282BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1283 total_bytes, 64);
1284BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1285 bytes_used, 64);
1286BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1287 io_align, 32);
1288BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1289 io_width, 32);
1290BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1291 sector_size, 32);
1292BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001293BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1294 dev_group, 32);
1295BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1296 seek_speed, 8);
1297BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1298 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001299BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1300 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001301
Chris Mason0b86a832008-03-24 15:01:56 -04001302static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1303{
1304 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1305}
1306
Yan Zheng2b820322008-11-17 21:11:30 -05001307static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1308{
1309 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1310}
1311
Chris Masone17cade2008-04-15 15:41:47 -04001312BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001313BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1314BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1315BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1316BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1317BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1318BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1319BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001320BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001321BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1322BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1323
Chris Masone17cade2008-04-15 15:41:47 -04001324static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1325{
1326 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1327}
1328
1329BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001330BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1331BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1332 stripe_len, 64);
1333BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1334 io_align, 32);
1335BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1336 io_width, 32);
1337BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1338 sector_size, 32);
1339BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1340BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1341 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001342BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1343 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001344BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1345BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1346
1347static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1348 int nr)
1349{
1350 unsigned long offset = (unsigned long)c;
1351 offset += offsetof(struct btrfs_chunk, stripe);
1352 offset += nr * sizeof(struct btrfs_stripe);
1353 return (struct btrfs_stripe *)offset;
1354}
1355
Chris Masona4437552008-04-18 10:29:38 -04001356static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1357{
1358 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1359}
1360
Chris Mason0b86a832008-03-24 15:01:56 -04001361static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1362 struct btrfs_chunk *c, int nr)
1363{
1364 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1365}
1366
1367static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1368 struct btrfs_chunk *c, int nr,
1369 u64 val)
1370{
1371 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1372}
1373
1374static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1375 struct btrfs_chunk *c, int nr)
1376{
1377 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1378}
1379
1380static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1381 struct btrfs_chunk *c, int nr,
1382 u64 val)
1383{
1384 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1385}
1386
Chris Mason5f39d392007-10-15 16:14:19 -04001387/* struct btrfs_block_group_item */
1388BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1389 used, 64);
1390BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1391 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001392BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1393 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001394
1395BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001396 struct btrfs_block_group_item, chunk_objectid, 64);
1397BTRFS_SETGET_FUNCS(disk_block_group_flags,
1398 struct btrfs_block_group_item, flags, 64);
1399BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1400 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001401
Chris Mason39544012007-12-12 14:38:19 -05001402/* struct btrfs_inode_ref */
1403BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001404BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001405
Chris Mason5f39d392007-10-15 16:14:19 -04001406/* struct btrfs_inode_item */
1407BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001408BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001409BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001410BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001411BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001412BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1413BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1414BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1415BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1416BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04001417BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001418BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001419
Chris Mason0b86a832008-03-24 15:01:56 -04001420static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001421btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001422{
Chris Mason5f39d392007-10-15 16:14:19 -04001423 unsigned long ptr = (unsigned long)inode_item;
1424 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04001425 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001426}
1427
Chris Mason0b86a832008-03-24 15:01:56 -04001428static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001429btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001430{
Chris Mason5f39d392007-10-15 16:14:19 -04001431 unsigned long ptr = (unsigned long)inode_item;
1432 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04001433 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001434}
1435
Chris Mason0b86a832008-03-24 15:01:56 -04001436static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001437btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001438{
Chris Mason5f39d392007-10-15 16:14:19 -04001439 unsigned long ptr = (unsigned long)inode_item;
1440 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04001441 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001442}
1443
Chris Mason0b86a832008-03-24 15:01:56 -04001444static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001445btrfs_inode_otime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001446{
Chris Mason5f39d392007-10-15 16:14:19 -04001447 unsigned long ptr = (unsigned long)inode_item;
1448 ptr += offsetof(struct btrfs_inode_item, otime);
Chris Mason0b86a832008-03-24 15:01:56 -04001449 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001450}
1451
Chris Mason0b86a832008-03-24 15:01:56 -04001452BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1453BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001454
Chris Mason0b86a832008-03-24 15:01:56 -04001455/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04001456BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1457 chunk_tree, 64);
1458BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1459 chunk_objectid, 64);
1460BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1461 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001462BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1463
Chris Masone17cade2008-04-15 15:41:47 -04001464static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1465{
1466 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1467 return (u8 *)((unsigned long)dev + ptr);
1468}
1469
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001470BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1471BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1472 generation, 64);
1473BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001474
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001475BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001476
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001477
1478BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1479
1480static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1481 struct btrfs_tree_block_info *item,
1482 struct btrfs_disk_key *key)
1483{
1484 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1485}
1486
1487static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1488 struct btrfs_tree_block_info *item,
1489 struct btrfs_disk_key *key)
1490{
1491 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1492}
1493
1494BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1495 root, 64);
1496BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1497 objectid, 64);
1498BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1499 offset, 64);
1500BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1501 count, 32);
1502
1503BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1504 count, 32);
1505
1506BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1507 type, 8);
1508BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1509 offset, 64);
1510
1511static inline u32 btrfs_extent_inline_ref_size(int type)
1512{
1513 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1514 type == BTRFS_SHARED_BLOCK_REF_KEY)
1515 return sizeof(struct btrfs_extent_inline_ref);
1516 if (type == BTRFS_SHARED_DATA_REF_KEY)
1517 return sizeof(struct btrfs_shared_data_ref) +
1518 sizeof(struct btrfs_extent_inline_ref);
1519 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1520 return sizeof(struct btrfs_extent_data_ref) +
1521 offsetof(struct btrfs_extent_inline_ref, offset);
1522 BUG();
1523 return 0;
1524}
1525
1526BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1527BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1528 generation, 64);
1529BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1530BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001531
1532/* struct btrfs_node */
1533BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001534BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001535
1536static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001537{
Chris Mason5f39d392007-10-15 16:14:19 -04001538 unsigned long ptr;
1539 ptr = offsetof(struct btrfs_node, ptrs) +
1540 sizeof(struct btrfs_key_ptr) * nr;
1541 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001542}
1543
Chris Mason5f39d392007-10-15 16:14:19 -04001544static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1545 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04001546{
Chris Mason5f39d392007-10-15 16:14:19 -04001547 unsigned long ptr;
1548 ptr = offsetof(struct btrfs_node, ptrs) +
1549 sizeof(struct btrfs_key_ptr) * nr;
1550 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04001551}
1552
Chris Mason74493f72007-12-11 09:25:06 -05001553static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1554{
1555 unsigned long ptr;
1556 ptr = offsetof(struct btrfs_node, ptrs) +
1557 sizeof(struct btrfs_key_ptr) * nr;
1558 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1559}
1560
1561static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1562 int nr, u64 val)
1563{
1564 unsigned long ptr;
1565 ptr = offsetof(struct btrfs_node, ptrs) +
1566 sizeof(struct btrfs_key_ptr) * nr;
1567 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1568}
1569
Chris Mason810191f2007-10-15 16:18:55 -04001570static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04001571{
Chris Mason5f39d392007-10-15 16:14:19 -04001572 return offsetof(struct btrfs_node, ptrs) +
1573 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04001574}
1575
Chris Masone644d022007-11-06 15:09:29 -05001576void btrfs_node_key(struct extent_buffer *eb,
1577 struct btrfs_disk_key *disk_key, int nr);
1578
Chris Mason5f39d392007-10-15 16:14:19 -04001579static inline void btrfs_set_node_key(struct extent_buffer *eb,
1580 struct btrfs_disk_key *disk_key, int nr)
1581{
1582 unsigned long ptr;
1583 ptr = btrfs_node_key_ptr_offset(nr);
1584 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1585 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001586}
1587
Chris Mason5f39d392007-10-15 16:14:19 -04001588/* struct btrfs_item */
1589BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1590BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1591
1592static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001593{
Chris Mason5f39d392007-10-15 16:14:19 -04001594 return offsetof(struct btrfs_leaf, items) +
1595 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001596}
1597
Chris Mason5f39d392007-10-15 16:14:19 -04001598static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1599 int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001600{
Chris Mason5f39d392007-10-15 16:14:19 -04001601 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001602}
1603
Chris Mason5f39d392007-10-15 16:14:19 -04001604static inline u32 btrfs_item_end(struct extent_buffer *eb,
1605 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001606{
Chris Mason5f39d392007-10-15 16:14:19 -04001607 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04001608}
1609
Chris Mason5f39d392007-10-15 16:14:19 -04001610static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001611{
Chris Mason5f39d392007-10-15 16:14:19 -04001612 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001613}
1614
Chris Mason5f39d392007-10-15 16:14:19 -04001615static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001616{
Chris Mason5f39d392007-10-15 16:14:19 -04001617 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001618}
1619
Chris Mason5f39d392007-10-15 16:14:19 -04001620static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001621{
Chris Mason5f39d392007-10-15 16:14:19 -04001622 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001623}
1624
Chris Mason5f39d392007-10-15 16:14:19 -04001625static inline void btrfs_item_key(struct extent_buffer *eb,
1626 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001627{
Chris Mason5f39d392007-10-15 16:14:19 -04001628 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1629 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001630}
1631
Chris Mason5f39d392007-10-15 16:14:19 -04001632static inline void btrfs_set_item_key(struct extent_buffer *eb,
1633 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001634{
Chris Mason5f39d392007-10-15 16:14:19 -04001635 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1636 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001637}
1638
Chris Masone02119d2008-09-05 16:13:11 -04001639BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1640
Chris Mason0660b5a2008-11-17 20:37:39 -05001641/*
1642 * struct btrfs_root_ref
1643 */
1644BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1645BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1646BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1647
Chris Mason5f39d392007-10-15 16:14:19 -04001648/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05001649BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04001650BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1651BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04001652BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001653
1654static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1655 struct btrfs_dir_item *item,
1656 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001657{
Chris Mason5f39d392007-10-15 16:14:19 -04001658 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001659}
1660
Chris Mason5f39d392007-10-15 16:14:19 -04001661static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1662 struct btrfs_dir_item *item,
1663 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001664{
Chris Mason5f39d392007-10-15 16:14:19 -04001665 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001666}
1667
Chris Mason5f39d392007-10-15 16:14:19 -04001668/* struct btrfs_disk_key */
1669BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1670 objectid, 64);
1671BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1672BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04001673
Chris Masone2fa7222007-03-12 16:22:34 -04001674static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1675 struct btrfs_disk_key *disk)
1676{
1677 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001678 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001679 cpu->objectid = le64_to_cpu(disk->objectid);
1680}
1681
1682static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1683 struct btrfs_key *cpu)
1684{
1685 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001686 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001687 disk->objectid = cpu_to_le64(cpu->objectid);
1688}
1689
Chris Mason5f39d392007-10-15 16:14:19 -04001690static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1691 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001692{
Chris Mason5f39d392007-10-15 16:14:19 -04001693 struct btrfs_disk_key disk_key;
1694 btrfs_node_key(eb, &disk_key, nr);
1695 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001696}
1697
Chris Mason5f39d392007-10-15 16:14:19 -04001698static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1699 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001700{
Chris Mason5f39d392007-10-15 16:14:19 -04001701 struct btrfs_disk_key disk_key;
1702 btrfs_item_key(eb, &disk_key, nr);
1703 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001704}
1705
Chris Mason5f39d392007-10-15 16:14:19 -04001706static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1707 struct btrfs_dir_item *item,
1708 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001709{
Chris Mason5f39d392007-10-15 16:14:19 -04001710 struct btrfs_disk_key disk_key;
1711 btrfs_dir_item_key(eb, item, &disk_key);
1712 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001713}
1714
Chris Mason5f39d392007-10-15 16:14:19 -04001715
1716static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001717{
Chris Mason5f39d392007-10-15 16:14:19 -04001718 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001719}
1720
Chris Mason5f39d392007-10-15 16:14:19 -04001721static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04001722{
Chris Mason5f39d392007-10-15 16:14:19 -04001723 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04001724}
1725
Chris Mason5f39d392007-10-15 16:14:19 -04001726/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04001727BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001728BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1729 generation, 64);
1730BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1731BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04001732BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001733BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1734
Chris Mason63b10fc2008-04-01 11:21:32 -04001735static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1736{
1737 return (btrfs_header_flags(eb) & flag) == flag;
1738}
1739
1740static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1741{
1742 u64 flags = btrfs_header_flags(eb);
1743 btrfs_set_header_flags(eb, flags | flag);
1744 return (flags & flag) == flag;
1745}
1746
1747static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1748{
1749 u64 flags = btrfs_header_flags(eb);
1750 btrfs_set_header_flags(eb, flags & ~flag);
1751 return (flags & flag) == flag;
1752}
1753
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001754static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1755{
1756 u64 flags = btrfs_header_flags(eb);
1757 return flags >> BTRFS_BACKREF_REV_SHIFT;
1758}
1759
1760static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1761 int rev)
1762{
1763 u64 flags = btrfs_header_flags(eb);
1764 flags &= ~BTRFS_BACKREF_REV_MASK;
1765 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1766 btrfs_set_header_flags(eb, flags);
1767}
1768
Chris Mason5f39d392007-10-15 16:14:19 -04001769static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
Chris Masone2fa7222007-03-12 16:22:34 -04001770{
Chris Mason5f39d392007-10-15 16:14:19 -04001771 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1772 return (u8 *)ptr;
Chris Masone2fa7222007-03-12 16:22:34 -04001773}
1774
Chris Masone17cade2008-04-15 15:41:47 -04001775static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1776{
1777 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1778 return (u8 *)ptr;
1779}
1780
Chris Mason5f39d392007-10-15 16:14:19 -04001781static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001782{
Chris Mason5f39d392007-10-15 16:14:19 -04001783 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1784 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001785}
1786
Chris Mason5f39d392007-10-15 16:14:19 -04001787static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001788{
Chris Mason5f39d392007-10-15 16:14:19 -04001789 unsigned long ptr = offsetof(struct btrfs_header, csum);
1790 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001791}
1792
Chris Mason5f39d392007-10-15 16:14:19 -04001793static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001794{
Chris Mason5f39d392007-10-15 16:14:19 -04001795 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001796}
1797
Chris Mason5f39d392007-10-15 16:14:19 -04001798static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001799{
Chris Mason5f39d392007-10-15 16:14:19 -04001800 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001801}
1802
Chris Mason5f39d392007-10-15 16:14:19 -04001803static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001804{
Chris Mason5f39d392007-10-15 16:14:19 -04001805 return NULL;
Chris Mason7518a232007-03-12 12:01:18 -04001806}
1807
Chris Mason5f39d392007-10-15 16:14:19 -04001808static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001809{
Chris Masond3977122009-01-05 21:25:51 -05001810 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04001811}
1812
Chris Mason5f39d392007-10-15 16:14:19 -04001813/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04001814BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1815 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001816BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04001817BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1818BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001819
Yan Zheng84234f32008-10-29 14:49:05 -04001820BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1821 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001822BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1823BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001824BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1825BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001826BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04001827BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1828BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04001829BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1830 last_snapshot, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001831
1832/* struct btrfs_super_block */
Josef Bacik607d4322008-12-02 07:17:45 -05001833
Chris Masondb945352007-10-15 16:15:53 -04001834BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04001835BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001836BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1837 generation, 64);
1838BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001839BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1840 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04001841BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1842 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001843BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1844 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04001845BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1846 chunk_root, 64);
1847BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04001848 chunk_root_level, 8);
1849BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1850 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001851BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1852 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001853BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1854 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04001855BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1856 total_bytes, 64);
1857BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1858 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001859BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1860 sectorsize, 32);
1861BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1862 nodesize, 32);
1863BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1864 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05001865BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1866 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001867BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1868 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001869BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1870 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001871BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1872 compat_flags, 64);
1873BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00001874 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001875BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1876 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05001877BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1878 csum_type, 16);
1879
1880static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1881{
1882 int t = btrfs_super_csum_type(s);
1883 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1884 return btrfs_csum_sizes[t];
1885}
Chris Mason5f39d392007-10-15 16:14:19 -04001886
1887static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04001888{
Chris Mason5f39d392007-10-15 16:14:19 -04001889 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04001890}
1891
Chris Mason5f39d392007-10-15 16:14:19 -04001892/* struct btrfs_file_extent_item */
1893BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04001894
Chris Masond3977122009-01-05 21:25:51 -05001895static inline unsigned long
1896btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454df2007-04-19 13:37:44 -04001897{
Chris Mason5f39d392007-10-15 16:14:19 -04001898 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04001899 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04001900 return offset;
Chris Mason236454df2007-04-19 13:37:44 -04001901}
1902
1903static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1904{
Chris Masondb945352007-10-15 16:15:53 -04001905 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454df2007-04-19 13:37:44 -04001906}
1907
Chris Masondb945352007-10-15 16:15:53 -04001908BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1909 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001910BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1911 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001912BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1913 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001914BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1915 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04001916BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1917 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04001918BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1919 ram_bytes, 64);
1920BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1921 compression, 8);
1922BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1923 encryption, 8);
1924BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1925 other_encoding, 16);
1926
1927/* this returns the number of file bytes represented by the inline item.
1928 * If an item is compressed, this is the uncompressed size
1929 */
1930static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1931 struct btrfs_file_extent_item *e)
1932{
1933 return btrfs_file_extent_ram_bytes(eb, e);
1934}
1935
1936/*
1937 * this returns the number of bytes used by the item on disk, minus the
1938 * size of any extent headers. If a file is compressed on disk, this is
1939 * the compressed size
1940 */
1941static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1942 struct btrfs_item *e)
1943{
1944 unsigned long offset;
1945 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1946 return btrfs_item_size(eb, e) - offset;
1947}
Chris Mason9f5fae22007-03-20 14:38:32 -04001948
Chris Masone20d96d2007-03-22 12:13:20 -04001949static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1950{
1951 return sb->s_fs_info;
1952}
1953
Josef Bacik58176a92007-08-29 15:47:34 -04001954static inline int btrfs_set_root_name(struct btrfs_root *root,
1955 const char *name, int len)
1956{
1957 /* if we already have a name just free it */
Chris Masond3977122009-01-05 21:25:51 -05001958 kfree(root->name);
Josef Bacik58176a92007-08-29 15:47:34 -04001959
1960 root->name = kmalloc(len+1, GFP_KERNEL);
1961 if (!root->name)
1962 return -ENOMEM;
1963
1964 memcpy(root->name, name, len);
Chris Masond3977122009-01-05 21:25:51 -05001965 root->name[len] = '\0';
Josef Bacik58176a92007-08-29 15:47:34 -04001966
1967 return 0;
1968}
1969
Chris Masond3977122009-01-05 21:25:51 -05001970static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1971{
Chris Masondb945352007-10-15 16:15:53 -04001972 if (level == 0)
1973 return root->leafsize;
1974 return root->nodesize;
1975}
1976
Chris Mason4beb1b82007-03-14 10:31:29 -04001977/* helper function to cast into the data area of the leaf. */
1978#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04001979 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04001980 btrfs_item_offset_nr(leaf, slot)))
1981
1982#define btrfs_item_ptr_offset(leaf, slot) \
1983 ((unsigned long)(btrfs_leaf_data(leaf) + \
1984 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04001985
Chris Mason2b1f55b2008-09-24 11:48:04 -04001986static inline struct dentry *fdentry(struct file *file)
1987{
Chris Mason6da6aba2007-12-18 16:15:09 -05001988 return file->f_path.dentry;
Chris Mason6da6aba2007-12-18 16:15:09 -05001989}
1990
Chris Masonb18c6682007-04-17 13:26:50 -04001991/* extent-tree.c */
Chris Masonfa9c0d792009-04-03 09:47:43 -04001992void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04001993int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1994 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04001995int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04001996int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1997 struct btrfs_root *root, u64 bytenr,
1998 u64 num_bytes, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04001999int btrfs_pin_extent(struct btrfs_root *root,
2000 u64 bytenr, u64 num, int reserved);
Chris Masone02119d2008-09-05 16:13:11 -04002001int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2002 struct btrfs_root *root, struct extent_buffer *leaf);
Yan Zheng80ff3852008-10-30 14:20:02 -04002003int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002004 struct btrfs_root *root,
2005 u64 objectid, u64 offset, u64 bytenr);
Chris Masond1310b22008-01-24 16:13:08 -05002006int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
Chris Masond3977122009-01-05 21:25:51 -05002007struct btrfs_block_group_cache *btrfs_lookup_block_group(
2008 struct btrfs_fs_info *info,
2009 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002010void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002011u64 btrfs_find_block_group(struct btrfs_root *root,
2012 u64 search_start, u64 search_hint, int owner);
Chris Mason5f39d392007-10-15 16:14:19 -04002013struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002014 struct btrfs_root *root, u32 blocksize,
2015 u64 parent, u64 root_objectid,
2016 struct btrfs_disk_key *key, int level,
2017 u64 hint, u64 empty_size);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002018void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2019 struct btrfs_root *root,
2020 struct extent_buffer *buf,
2021 u64 parent, int last_ref);
Chris Mason65b51a02008-08-01 15:11:20 -04002022struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2023 struct btrfs_root *root,
Chris Mason4008c042009-02-12 14:09:45 -05002024 u64 bytenr, u32 blocksize,
2025 int level);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002026int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2027 struct btrfs_root *root,
2028 u64 root_objectid, u64 owner,
2029 u64 offset, struct btrfs_key *ins);
2030int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2031 struct btrfs_root *root,
2032 u64 root_objectid, u64 owner, u64 offset,
2033 struct btrfs_key *ins);
Chris Masone6dcd2d2008-07-17 12:53:50 -04002034int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2035 struct btrfs_root *root,
2036 u64 num_bytes, u64 min_alloc_size,
2037 u64 empty_size, u64 hint_byte,
2038 u64 search_end, struct btrfs_key *ins,
2039 u64 data);
Chris Masone089f052007-03-16 16:20:31 -04002040int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002041 struct extent_buffer *buf, int full_backref);
2042int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2043 struct extent_buffer *buf, int full_backref);
2044int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2045 struct btrfs_root *root,
2046 u64 bytenr, u64 num_bytes, u64 flags,
2047 int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002048int btrfs_free_extent(struct btrfs_trans_handle *trans,
2049 struct btrfs_root *root,
2050 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002051 u64 root_objectid, u64 owner, u64 offset);
2052
Chris Mason65b51a02008-08-01 15:11:20 -04002053int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Yan Zheng11833d62009-09-11 16:11:19 -04002054int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2055 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04002056int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04002057 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04002058int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04002059 struct btrfs_root *root,
2060 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002061 u64 root_objectid, u64 owner, u64 offset);
2062
Chris Mason9078a3e2007-04-26 16:46:15 -04002063int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2064 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002065int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002066int btrfs_free_block_groups(struct btrfs_fs_info *info);
2067int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04002068int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002069int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2070 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04002071 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04002072 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04002073int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2074 struct btrfs_root *root, u64 group_start);
Yan Zheng2b820322008-11-17 21:11:30 -05002075u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
Josef Bacik6a632092009-02-20 11:00:09 -05002076void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
Chris Mason4184ea72009-03-10 12:39:20 -04002077void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002078int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2079void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002080int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2081 struct btrfs_root *root,
2082 int num_items, int *retries);
2083void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2084 struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002085int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2086 struct inode *inode);
2087void btrfs_orphan_release_metadata(struct inode *inode);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002088int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2089 struct btrfs_pending_snapshot *pending);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002090int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2091void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2092int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2093void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002094void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2095struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2096void btrfs_free_block_rsv(struct btrfs_root *root,
2097 struct btrfs_block_rsv *rsv);
2098void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2099 struct btrfs_block_rsv *rsv);
2100int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2101 struct btrfs_root *root,
2102 struct btrfs_block_rsv *block_rsv,
2103 u64 num_bytes, int *retries);
2104int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2105 struct btrfs_root *root,
2106 struct btrfs_block_rsv *block_rsv,
2107 u64 min_reserved, int min_factor);
2108int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2109 struct btrfs_block_rsv *dst_rsv,
2110 u64 num_bytes);
2111void btrfs_block_rsv_release(struct btrfs_root *root,
2112 struct btrfs_block_rsv *block_rsv,
2113 u64 num_bytes);
2114int btrfs_set_block_group_ro(struct btrfs_root *root,
2115 struct btrfs_block_group_cache *cache);
2116int btrfs_set_block_group_rw(struct btrfs_root *root,
2117 struct btrfs_block_group_cache *cache);
Chris Masondee26a92007-03-26 16:00:06 -04002118/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002119int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2120 int level, int *slot);
2121int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002122int btrfs_previous_item(struct btrfs_root *root,
2123 struct btrfs_path *path, u64 min_objectid,
2124 int type);
Zheng Yan31840ae2008-09-23 13:14:14 -04002125int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2126 struct btrfs_root *root, struct btrfs_path *path,
2127 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002128struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2129struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002130int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002131 struct btrfs_key *key, int lowest_level,
2132 int cache_only, u64 min_trans);
2133int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Chris Masone02119d2008-09-05 16:13:11 -04002134 struct btrfs_key *max_key,
Chris Mason3f157a22008-06-25 16:01:31 -04002135 struct btrfs_path *path, int cache_only,
2136 u64 min_trans);
Chris Mason5f39d392007-10-15 16:14:19 -04002137int btrfs_cow_block(struct btrfs_trans_handle *trans,
2138 struct btrfs_root *root, struct extent_buffer *buf,
2139 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002140 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002141int btrfs_copy_root(struct btrfs_trans_handle *trans,
2142 struct btrfs_root *root,
2143 struct extent_buffer *buf,
2144 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002145int btrfs_block_can_be_shared(struct btrfs_root *root,
2146 struct extent_buffer *buf);
Chris Mason6567e832007-04-16 09:22:45 -04002147int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2148 *root, struct btrfs_path *path, u32 data_size);
Chris Masonb18c6682007-04-17 13:26:50 -04002149int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2150 struct btrfs_root *root,
2151 struct btrfs_path *path,
Chris Mason179e29e2007-11-01 11:28:41 -04002152 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002153int btrfs_split_item(struct btrfs_trans_handle *trans,
2154 struct btrfs_root *root,
2155 struct btrfs_path *path,
2156 struct btrfs_key *new_key,
2157 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002158int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2159 struct btrfs_root *root,
2160 struct btrfs_path *path,
2161 struct btrfs_key *new_key);
Chris Masone089f052007-03-16 16:20:31 -04002162int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2163 *root, struct btrfs_key *key, struct btrfs_path *p, int
2164 ins_len, int cow);
Chris Mason6702ed42007-08-07 16:15:09 -04002165int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002166 struct btrfs_root *root, struct extent_buffer *parent,
Chris Masona6b6e752007-10-15 16:22:39 -04002167 int start_slot, int cache_only, u64 *last_ret,
2168 struct btrfs_key *progress);
Chris Mason234b63a2007-03-13 10:46:10 -04002169void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04002170struct btrfs_path *btrfs_alloc_path(void);
2171void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002172void btrfs_set_path_blocking(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002173void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2174
Chris Mason85e21ba2008-01-29 15:11:36 -05002175int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2176 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05002177static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
2179 struct btrfs_path *path)
2180{
2181 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2182}
2183
Chris Masone089f052007-03-16 16:20:31 -04002184int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2185 *root, struct btrfs_key *key, void *data, u32 data_size);
Josef Bacikf3465ca2008-11-12 14:19:50 -05002186int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2187 struct btrfs_root *root,
2188 struct btrfs_path *path,
2189 struct btrfs_key *cpu_key, u32 *data_size,
2190 int nr);
Chris Mason9c583092008-01-29 15:15:18 -05002191int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2192 struct btrfs_root *root,
2193 struct btrfs_path *path,
2194 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2195
2196static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *root,
2198 struct btrfs_path *path,
2199 struct btrfs_key *key,
2200 u32 data_size)
2201{
2202 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2203}
2204
Chris Mason234b63a2007-03-13 10:46:10 -04002205int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason7bb86312007-12-11 09:25:06 -05002206int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason5f39d392007-10-15 16:14:19 -04002207int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Yan, Zheng3fd0a552010-05-16 10:49:59 -04002208int btrfs_drop_snapshot(struct btrfs_root *root,
2209 struct btrfs_block_rsv *block_rsv, int update_ref);
Yan Zhengf82d02d2008-10-29 14:49:05 -04002210int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2211 struct btrfs_root *root,
2212 struct extent_buffer *node,
2213 struct extent_buffer *parent);
Chris Masondee26a92007-03-26 16:00:06 -04002214/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05002215int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002216 struct btrfs_path *path,
2217 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05002218int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2219 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002220 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2221 const char *name, int name_len);
2222int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2223 struct btrfs_root *tree_root,
2224 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05002225 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04002226int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2227 struct btrfs_key *key);
2228int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2229 *root, struct btrfs_key *key, struct btrfs_root_item
2230 *item);
2231int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2232 *root, struct btrfs_key *key, struct btrfs_root_item
2233 *item);
2234int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2235 btrfs_root_item *item, struct btrfs_key *key);
Chris Masonbf4ef672008-05-08 13:26:18 -04002236int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2237 u64 *found_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002238int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
Yan, Zheng76dda932009-09-21 16:00:26 -04002239int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002240int btrfs_set_root_node(struct btrfs_root_item *item,
2241 struct extent_buffer *node);
Chris Masondee26a92007-03-26 16:00:06 -04002242/* dir-item.c */
Chris Masond3977122009-01-05 21:25:51 -05002243int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2244 struct btrfs_root *root, const char *name,
2245 int name_len, u64 dir,
Josef Bacikaec74772008-07-24 12:12:38 -04002246 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04002247struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2248 struct btrfs_root *root,
2249 struct btrfs_path *path, u64 dir,
2250 const char *name, int name_len,
2251 int mod);
2252struct btrfs_dir_item *
2253btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2254 struct btrfs_root *root,
2255 struct btrfs_path *path, u64 dir,
2256 u64 objectid, const char *name, int name_len,
2257 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002258struct btrfs_dir_item *
2259btrfs_search_dir_index_item(struct btrfs_root *root,
2260 struct btrfs_path *path, u64 dirid,
2261 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002262struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2263 struct btrfs_path *path,
Chris Mason7f5c1512007-03-23 15:56:19 -04002264 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002265int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2266 struct btrfs_root *root,
2267 struct btrfs_path *path,
2268 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05002269int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002270 struct btrfs_root *root,
2271 struct btrfs_path *path, u64 objectid,
2272 const char *name, u16 name_len,
2273 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05002274struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2275 struct btrfs_root *root,
2276 struct btrfs_path *path, u64 dir,
2277 const char *name, u16 name_len,
2278 int mod);
Josef Bacik7b128762008-07-24 12:17:14 -04002279
2280/* orphan.c */
2281int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2282 struct btrfs_root *root, u64 offset);
2283int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002285int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04002286
Chris Masondee26a92007-03-26 16:00:06 -04002287/* inode-map.c */
Chris Mason9f5fae22007-03-20 14:38:32 -04002288int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2289 struct btrfs_root *fs_root,
2290 u64 dirid, u64 *objectid);
Chris Mason5be6f7f2007-04-05 13:35:25 -04002291int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2292
Chris Masondee26a92007-03-26 16:00:06 -04002293/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05002294int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2295 struct btrfs_root *root,
2296 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002297 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05002298int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2299 struct btrfs_root *root,
2300 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002301 u64 inode_objectid, u64 ref_objectid, u64 *index);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002302struct btrfs_inode_ref *
2303btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2304 struct btrfs_root *root,
2305 struct btrfs_path *path,
2306 const char *name, int name_len,
2307 u64 inode_objectid, u64 ref_objectid, int mod);
Chris Mason5f39d392007-10-15 16:14:19 -04002308int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04002311int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04002312 *root, struct btrfs_path *path,
2313 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04002314
2315/* file-item.c */
Chris Mason459931e2008-12-10 09:10:46 -05002316int btrfs_del_csums(struct btrfs_trans_handle *trans,
2317 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04002318int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002319 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04002320int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2321 struct bio *bio, u64 logical_offset, u32 *dst);
Chris Masonb18c6682007-04-17 13:26:50 -04002322int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04002323 struct btrfs_root *root,
2324 u64 objectid, u64 pos,
2325 u64 disk_offset, u64 disk_num_bytes,
2326 u64 num_bytes, u64 offset, u64 ram_bytes,
2327 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04002328int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2329 struct btrfs_root *root,
2330 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04002331 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05002332int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05002333 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04002334 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04002335int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002336 struct bio *bio, u64 file_start, int contig);
Chris Masonc8b97812008-10-29 14:49:59 -04002337int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2338 u64 start, unsigned long len);
Chris Masonb18c6682007-04-17 13:26:50 -04002339struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2340 struct btrfs_root *root,
2341 struct btrfs_path *path,
Chris Masond20f7042008-12-08 16:58:54 -05002342 u64 bytenr, int cow);
Chris Mason1de037a2007-05-29 15:17:08 -04002343int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root, struct btrfs_path *path,
2345 u64 isize);
Yan Zheng17d217f2008-12-12 10:03:38 -05002346int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2347 u64 end, struct list_head *list);
Chris Mason39279cc2007-06-12 06:35:45 -04002348/* inode.c */
Chris Mason4881ee52008-07-24 09:51:08 -04002349
2350/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04002351#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04002352#define ClearPageChecked ClearPageFsMisc
2353#define SetPageChecked SetPageFsMisc
2354#define PageChecked PageFsMisc
2355#endif
2356
Chris Mason3de45862008-11-17 21:02:50 -05002357struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2358int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04002359int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2360 struct btrfs_root *root,
2361 struct inode *dir, struct inode *inode,
2362 const char *name, int name_len);
2363int btrfs_add_link(struct btrfs_trans_handle *trans,
2364 struct inode *parent_inode, struct inode *inode,
2365 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002366int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2367 struct btrfs_root *root,
2368 struct inode *dir, u64 objectid,
2369 const char *name, int name_len);
Chris Masone02119d2008-09-05 16:13:11 -04002370int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2371 struct btrfs_root *root,
2372 struct inode *inode, u64 new_size,
2373 u32 min_type);
2374
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002375int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Yan, Zheng5da9d012010-05-16 10:46:25 -04002376int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput);
Josef Bacik2ac55d42010-02-03 19:33:23 +00002377int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2378 struct extent_state **cached_state);
Chris Masonf4219502008-07-22 11:18:09 -04002379int btrfs_writepages(struct address_space *mapping,
2380 struct writeback_control *wbc);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002381int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Yan, Zheng76dda932009-09-21 16:00:26 -04002382 struct btrfs_root *new_root,
Yan Zhengd2fb3432008-12-11 16:30:39 -05002383 u64 new_dirid, u64 alloc_hint);
Chris Mason239b14b2008-03-24 15:02:07 -04002384int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -04002385 size_t size, struct bio *bio, unsigned long bio_flags);
Chris Mason239b14b2008-03-24 15:02:07 -04002386
Chris Masonedbd8d42007-12-21 16:27:24 -05002387unsigned long btrfs_force_ra(struct address_space *mapping,
2388 struct file_ra_state *ra, struct file *file,
2389 pgoff_t offset, pgoff_t last_index);
Nick Pigginc2ec1752009-03-31 15:23:21 -07002390int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04002391int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04002392void btrfs_evict_inode(struct inode *inode);
Chris Mason2da98f02008-01-16 11:44:43 -05002393void btrfs_put_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01002394int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Chris Mason39279cc2007-06-12 06:35:45 -04002395void btrfs_dirty_inode(struct inode *inode);
2396struct inode *btrfs_alloc_inode(struct super_block *sb);
2397void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04002398int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04002399int btrfs_init_cachep(void);
2400void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04002401long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05302402struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00002403 struct btrfs_root *root, int *was_new);
Chris Mason39279cc2007-06-12 06:35:45 -04002404int btrfs_commit_write(struct file *file, struct page *page,
2405 unsigned from, unsigned to);
Chris Masona52d9a82007-08-27 16:49:44 -04002406struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2407 size_t page_offset, u64 start, u64 end,
2408 int create);
2409int btrfs_update_inode(struct btrfs_trans_handle *trans,
2410 struct btrfs_root *root,
2411 struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002412int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2413int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2414void btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002415void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2416 struct btrfs_pending_snapshot *pending,
2417 u64 *bytes_to_reserve);
2418void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2419 struct btrfs_pending_snapshot *pending);
2420void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root);
Yan Zheng9036c102008-10-30 14:19:41 -04002422int btrfs_cont_expand(struct inode *inode, loff_t size);
Yan, Zheng76dda932009-09-21 16:00:26 -04002423int btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002424void btrfs_add_delayed_iput(struct inode *inode);
2425void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04002426int btrfs_prealloc_file_range(struct inode *inode, int mode,
2427 u64 start, u64 num_bytes, u64 min_size,
2428 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04002429extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002430
2431/* ioctl.c */
2432long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002433void btrfs_update_iflags(struct inode *inode);
2434void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002435
Chris Mason39279cc2007-06-12 06:35:45 -04002436/* file.c */
Christoph Hellwig7ea80852010-05-26 17:53:25 +02002437int btrfs_sync_file(struct file *file, int datasync);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002438int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2439 int skip_pinned);
Chris Mason5f564062008-01-22 16:47:59 -05002440int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07002441extern const struct file_operations btrfs_file_operations;
Yan, Zheng920bbbf2009-11-12 09:34:08 +00002442int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2443 u64 start, u64 end, u64 *hint_byte, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04002444int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04002445 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04002446int btrfs_release_file(struct inode *inode, struct file *file);
2447
Chris Mason6702ed42007-08-07 16:15:09 -04002448/* tree-defrag.c */
2449int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root, int cache_only);
Josef Bacik58176a92007-08-29 15:47:34 -04002451
2452/* sysfs.c */
2453int btrfs_init_sysfs(void);
2454void btrfs_exit_sysfs(void);
2455int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2456int btrfs_sysfs_add_root(struct btrfs_root *root);
2457void btrfs_sysfs_del_root(struct btrfs_root *root);
2458void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2459
Josef Bacik5103e942007-11-16 11:45:54 -05002460/* xattr.c */
2461ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04002462
Chris Masonedbd8d42007-12-21 16:27:24 -05002463/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04002464int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04002465int btrfs_sync_fs(struct super_block *sb, int wait);
Josef Bacik33268ea2008-07-24 12:16:36 -04002466
2467/* acl.c */
Chris Mason0eda2942009-10-13 13:50:18 -04002468#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Josef Bacik33268ea2008-07-24 12:16:36 -04002469int btrfs_check_acl(struct inode *inode, int mask);
Al Viro7df336e2009-06-10 11:36:43 -04002470#else
2471#define btrfs_check_acl NULL
2472#endif
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002473int btrfs_init_acl(struct btrfs_trans_handle *trans,
2474 struct inode *inode, struct inode *dir);
Josef Bacik33268ea2008-07-24 12:16:36 -04002475int btrfs_acl_chmod(struct inode *inode);
Josef Bacik0f9dd462008-09-23 13:14:11 -04002476
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002477/* relocation.c */
2478int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2479int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2480 struct btrfs_root *root);
2481int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root);
2483int btrfs_recover_relocation(struct btrfs_root *root);
2484int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Yan, Zheng3fd0a552010-05-16 10:49:59 -04002485void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root, struct extent_buffer *buf,
2487 struct extent_buffer *cow);
2488void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2489 struct btrfs_pending_snapshot *pending,
2490 u64 *bytes_to_reserve);
2491void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2492 struct btrfs_pending_snapshot *pending);
Chris Masoneb60cea2007-02-02 09:18:22 -05002493#endif