blob: 8fd72331d6008c100e48db1c808566eb382187b2 [file] [log] [blame]
Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
Chris Masoneb60cea2007-02-02 09:18:22 -050021
Chris Mason810191f2007-10-15 16:18:55 -040022#include <linux/mm.h>
23#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040024#include <linux/fs.h>
Arne Jansena2de7332011-03-08 14:14:00 +010025#include <linux/rwsem.h>
Josef Bacik58176a92007-08-29 15:47:34 -040026#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040027#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040028#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Stefan Schmidtf8b18082011-01-12 10:30:42 +010030#include <linux/kobject.h>
liubo1abe9b82011-03-24 11:18:59 +000031#include <trace/events/btrfs.h>
Chris Mason479965d2007-10-15 16:14:27 -040032#include <asm/kmap_types.h>
Josef Bacik3b16a4e2011-09-21 15:05:58 -040033#include <linux/pagemap.h>
Chris Masond1310b22008-01-24 16:13:08 -050034#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040035#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040036#include "async-thread.h"
Arne Jansena2de7332011-03-08 14:14:00 +010037#include "ioctl.h"
Chris Masone20d96d2007-03-22 12:13:20 -040038
Chris Masone089f052007-03-16 16:20:31 -040039struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040040struct btrfs_transaction;
Yan, Zhenga22285a2010-05-16 10:48:46 -040041struct btrfs_pending_snapshot;
Chris Mason35b7e472007-05-02 15:53:43 -040042extern struct kmem_cache *btrfs_trans_handle_cachep;
43extern struct kmem_cache *btrfs_transaction_cachep;
44extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040045extern struct kmem_cache *btrfs_path_cachep;
Josef Bacikdc89e982011-01-28 17:05:48 -050046extern struct kmem_cache *btrfs_free_space_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040047struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040048
Chris Mason2a7108a2008-12-02 09:58:02 -050049#define BTRFS_MAGIC "_BHRfS_M"
Chris Masoneb60cea2007-02-02 09:18:22 -050050
Stefan Behrens94598ba2012-03-27 14:21:26 -040051#define BTRFS_MAX_MIRRORS 2
52
Chris Mason4008c042009-02-12 14:09:45 -050053#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040054
Yan Zheng5d4f98a2009-06-10 10:45:14 -040055#define BTRFS_COMPAT_EXTENT_TREE_V0
56
Chris Mason5a3f23d2009-03-31 13:27:11 -040057/*
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
61 */
62#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
63
Chris Mason0b86a832008-03-24 15:01:56 -040064/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040065#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040066
67/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040068#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040069
Chris Mason0b86a832008-03-24 15:01:56 -040070/*
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
73 */
Chris Masone085def2008-03-24 15:02:07 -040074#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040075
76/*
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
79 */
Chris Masone085def2008-03-24 15:02:07 -040080#define BTRFS_DEV_TREE_OBJECTID 4ULL
81
82/* one per subvolume, storing files and directories */
83#define BTRFS_FS_TREE_OBJECTID 5ULL
84
85/* directory objectid inside the root tree */
86#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040087
Chris Masond20f7042008-12-08 16:58:54 -050088/* holds checksums of all the data extents */
89#define BTRFS_CSUM_TREE_OBJECTID 7ULL
90
Ilya Dryomov0940ebf2012-01-16 22:04:48 +020091/* for storing balance parameters in the root tree */
92#define BTRFS_BALANCE_OBJECTID -4ULL
93
Josef Bacik7b128762008-07-24 12:17:14 -040094/* orhpan objectid for tracking unlinked/truncated files */
95#define BTRFS_ORPHAN_OBJECTID -5ULL
96
Chris Masone02119d2008-09-05 16:13:11 -040097/* does write ahead logging to speed up fsyncs */
98#define BTRFS_TREE_LOG_OBJECTID -6ULL
99#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
100
Zheng Yane4657682008-09-26 10:04:53 -0400101/* for space balancing */
102#define BTRFS_TREE_RELOC_OBJECTID -8ULL
103#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
104
Chris Masond20f7042008-12-08 16:58:54 -0500105/*
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
108 * for fsyncs
109 */
110#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
111
Josef Bacik0af3d002010-06-21 14:48:16 -0400112/* For storing free space cache */
113#define BTRFS_FREE_SPACE_OBJECTID -11ULL
114
Li Zefan82d59022011-04-20 10:33:24 +0800115/*
116 * The inode number assigned to the special inode for sotring
117 * free ino cache
118 */
119#define BTRFS_FREE_INO_OBJECTID -12ULL
120
Zheng Yan31840ae2008-09-23 13:14:14 -0400121/* dummy objectid represents multiple objectids */
122#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
123
Chris Mason0b86a832008-03-24 15:01:56 -0400124/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400125 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400126 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500127#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400128#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400129#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400130
Chris Mason0b86a832008-03-24 15:01:56 -0400131
132/*
133 * the device items go into the chunk tree. The key is in the form
134 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
135 */
136#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
137
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400138#define BTRFS_BTREE_INODE_OBJECTID 1
139
140#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
141
Chris Masonfec577f2007-02-26 10:40:21 -0500142/*
Chris Mason727011e2010-08-06 13:21:20 -0400143 * the max metadata block size. This limit is somewhat artificial,
144 * but the memmove costs go through the roof for larger blocks.
145 */
146#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
147
148/*
Chris Masone20d96d2007-03-22 12:13:20 -0400149 * we can actually store much bigger names, but lets not confuse the rest
150 * of linux
151 */
152#define BTRFS_NAME_LEN 255
153
Chris Masonf254e522007-03-29 15:15:27 -0400154/* 32 bytes in various csum fields */
155#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500156
157/* csum types */
158#define BTRFS_CSUM_TYPE_CRC32 0
159
160static int btrfs_csum_sizes[] = { 4, 0 };
161
Chris Mason509659c2007-05-10 12:36:17 -0400162/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500163#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400164
Chris Masonfabb5682007-06-07 22:13:21 -0400165#define BTRFS_FT_UNKNOWN 0
166#define BTRFS_FT_REG_FILE 1
167#define BTRFS_FT_DIR 2
168#define BTRFS_FT_CHRDEV 3
169#define BTRFS_FT_BLKDEV 4
170#define BTRFS_FT_FIFO 5
171#define BTRFS_FT_SOCK 6
172#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500173#define BTRFS_FT_XATTR 8
174#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400175
Chris Masone20d96d2007-03-22 12:13:20 -0400176/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400177 * The key defines the order in the tree, and so it also defines (optimal)
178 * block layout.
179 *
180 * objectid corresponds to the inode number.
181 *
182 * type tells us things about the object, and is a kind of stream selector.
183 * so for a given inode, keys with type of 1 might refer to the inode data,
184 * type of 2 may point to file data in the btree and type == 3 may point to
185 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500186 *
187 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400188 *
189 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
190 * in cpu native order. Otherwise they are identical and their sizes
191 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500192 */
Chris Masone2fa7222007-03-12 16:22:34 -0400193struct btrfs_disk_key {
194 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400195 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400196 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400197} __attribute__ ((__packed__));
198
199struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500200 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400201 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400202 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500203} __attribute__ ((__packed__));
204
Chris Mason0b86a832008-03-24 15:01:56 -0400205struct btrfs_mapping_tree {
206 struct extent_map_tree map_tree;
207};
208
Chris Mason0b86a832008-03-24 15:01:56 -0400209struct btrfs_dev_item {
210 /* the internal btrfs device id */
211 __le64 devid;
212
213 /* size of the device */
214 __le64 total_bytes;
215
216 /* bytes used */
217 __le64 bytes_used;
218
219 /* optimal io alignment for this device */
220 __le32 io_align;
221
222 /* optimal io width for this device */
223 __le32 io_width;
224
225 /* minimal io size for this device */
226 __le32 sector_size;
227
Chris Mason0b86a832008-03-24 15:01:56 -0400228 /* type and info about this device */
229 __le64 type;
230
Yan Zheng2b820322008-11-17 21:11:30 -0500231 /* expected generation for this device */
232 __le64 generation;
233
Chris Masonc3027eb2008-12-08 16:40:21 -0500234 /*
235 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400236 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500237 */
238 __le64 start_offset;
239
Chris Masone17cade2008-04-15 15:41:47 -0400240 /* grouping information for allocation decisions */
241 __le32 dev_group;
242
243 /* seek speed 0-100 where 100 is fastest */
244 u8 seek_speed;
245
246 /* bandwidth 0-100 where 100 is fastest */
247 u8 bandwidth;
248
Chris Mason0d81ba52008-03-24 15:02:07 -0400249 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400250 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500251
252 /* uuid of FS who owns this device */
253 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400254} __attribute__ ((__packed__));
255
256struct btrfs_stripe {
257 __le64 devid;
258 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400259 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400260} __attribute__ ((__packed__));
261
262struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400263 /* size of this chunk in bytes */
264 __le64 length;
265
266 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400267 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400268
Chris Mason0b86a832008-03-24 15:01:56 -0400269 __le64 stripe_len;
270 __le64 type;
271
272 /* optimal io alignment for this chunk */
273 __le32 io_align;
274
275 /* optimal io width for this chunk */
276 __le32 io_width;
277
278 /* minimal io size for this chunk */
279 __le32 sector_size;
280
281 /* 2^16 stripes is quite a lot, a second limit is the size of a single
282 * item in the btree
283 */
284 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400285
286 /* sub stripes only matter for raid10 */
287 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400288 struct btrfs_stripe stripe;
289 /* additional stripes go here */
290} __attribute__ ((__packed__));
291
Josef Bacik0af3d002010-06-21 14:48:16 -0400292#define BTRFS_FREE_SPACE_EXTENT 1
293#define BTRFS_FREE_SPACE_BITMAP 2
294
295struct btrfs_free_space_entry {
296 __le64 offset;
297 __le64 bytes;
298 u8 type;
299} __attribute__ ((__packed__));
300
301struct btrfs_free_space_header {
302 struct btrfs_disk_key location;
303 __le64 generation;
304 __le64 num_entries;
305 __le64 num_bitmaps;
306} __attribute__ ((__packed__));
307
Chris Mason0b86a832008-03-24 15:01:56 -0400308static inline unsigned long btrfs_chunk_item_size(int num_stripes)
309{
310 BUG_ON(num_stripes == 0);
311 return sizeof(struct btrfs_chunk) +
312 sizeof(struct btrfs_stripe) * (num_stripes - 1);
313}
314
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400315#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
316#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
liuboacce9522011-01-06 19:30:25 +0800317
318/*
319 * File system states
320 */
321
322/* Errors detected */
323#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
324
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400325#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
326#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
327
328#define BTRFS_BACKREF_REV_MAX 256
329#define BTRFS_BACKREF_REV_SHIFT 56
330#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
331 BTRFS_BACKREF_REV_SHIFT)
332
333#define BTRFS_OLD_BACKREF_REV 0
334#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400335
Chris Masonfec577f2007-02-26 10:40:21 -0500336/*
337 * every tree block (leaf or node) starts with this header.
338 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400339struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400340 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400341 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400342 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400343 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400344 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400345
346 /* allowed to be different from the super from here on down */
347 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400348 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400349 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400350 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400351 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500352} __attribute__ ((__packed__));
353
Chris Mason5f39d392007-10-15 16:14:19 -0400354#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500355 sizeof(struct btrfs_header)) / \
356 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400357#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400358#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454d2007-04-19 13:37:44 -0400359#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
360 sizeof(struct btrfs_item) - \
361 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000362#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) -\
364 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500365
Chris Mason0b86a832008-03-24 15:01:56 -0400366
367/*
368 * this is a very generous portion of the super block, giving us
369 * room to translate 14 chunks with 3 stripes each.
370 */
371#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400372#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400373
Chris Masonfec577f2007-02-26 10:40:21 -0500374/*
Chris Masonaf31f5e2011-11-03 15:17:42 -0400375 * just in case we somehow lose the roots and are not able to mount,
376 * we store an array of the roots from previous transactions
377 * in the super.
378 */
379#define BTRFS_NUM_BACKUP_ROOTS 4
380struct btrfs_root_backup {
381 __le64 tree_root;
382 __le64 tree_root_gen;
383
384 __le64 chunk_root;
385 __le64 chunk_root_gen;
386
387 __le64 extent_root;
388 __le64 extent_root_gen;
389
390 __le64 fs_root;
391 __le64 fs_root_gen;
392
393 __le64 dev_root;
394 __le64 dev_root_gen;
395
396 __le64 csum_root;
397 __le64 csum_root_gen;
398
399 __le64 total_bytes;
400 __le64 bytes_used;
401 __le64 num_devices;
402 /* future */
403 __le64 unsed_64[4];
404
405 u8 tree_root_level;
406 u8 chunk_root_level;
407 u8 extent_root_level;
408 u8 fs_root_level;
409 u8 dev_root_level;
410 u8 csum_root_level;
411 /* future and to align */
412 u8 unused_8[10];
413} __attribute__ ((__packed__));
414
415/*
Chris Masonfec577f2007-02-26 10:40:21 -0500416 * the super block basically lists the main trees of the FS
417 * it currently lacks any block count etc etc
418 */
Chris Mason234b63a2007-03-13 10:46:10 -0400419struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400420 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400421 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500422 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400423 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400424 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400425
426 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400427 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400428 __le64 generation;
429 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400430 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400431 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500432
433 /* this will help find the new super based on the log root */
434 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400435 __le64 total_bytes;
436 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400437 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400438 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400439 __le32 sectorsize;
440 __le32 nodesize;
441 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500442 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400443 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400444 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500445 __le64 compat_flags;
446 __le64 compat_ro_flags;
447 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500448 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400449 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400450 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400451 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400452 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500453
Chris Mason7ae9c092008-04-18 10:29:49 -0400454 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500455
Josef Bacik0af3d002010-06-21 14:48:16 -0400456 __le64 cache_generation;
457
Chris Masonc3027eb2008-12-08 16:40:21 -0500458 /* future expansion */
Josef Bacik0af3d002010-06-21 14:48:16 -0400459 __le64 reserved[31];
Chris Mason0b86a832008-03-24 15:01:56 -0400460 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masonaf31f5e2011-11-03 15:17:42 -0400461 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
Chris Masoncfaa7292007-02-21 17:04:57 -0500462} __attribute__ ((__packed__));
463
Chris Masonfec577f2007-02-26 10:40:21 -0500464/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500465 * Compat flags that we support. If any incompat flags are set other than the
466 * ones specified below then we will fail to mount
467 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400468#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
Josef Bacik0af3d002010-06-21 14:48:16 -0400469#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
Josef Bacik67377732010-09-16 16:19:09 -0400470#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
Li Zefana6fa6fa2010-10-25 15:12:26 +0800471#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
Chris Mason727011e2010-08-06 13:21:20 -0400472/*
473 * some patches floated around with a second compression method
474 * lets save that incompat here for when they do get in
475 * Note we don't actually support it, we're just reserving the
476 * number
477 */
478#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
479
480/*
481 * older kernels tried to do bigger metadata blocks, but the
482 * code was pretty buggy. Lets not let them try anymore.
483 */
484#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400485
486#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
487#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
Josef Bacik0af3d002010-06-21 14:48:16 -0400488#define BTRFS_FEATURE_INCOMPAT_SUPP \
489 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
Josef Bacik67377732010-09-16 16:19:09 -0400490 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800491 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
Chris Mason727011e2010-08-06 13:21:20 -0400492 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
Li Zefana6fa6fa2010-10-25 15:12:26 +0800493 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
Josef Bacikf2b636e2008-12-02 06:36:08 -0500494
495/*
Chris Mason62e27492007-03-15 12:56:47 -0400496 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500497 * the item in the leaf (relative to the start of the data area)
498 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400499struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400500 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400501 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400502 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500503} __attribute__ ((__packed__));
504
Chris Masonfec577f2007-02-26 10:40:21 -0500505/*
506 * leaves have an item area and a data area:
507 * [item0, item1....itemN] [free space] [dataN...data1, data0]
508 *
509 * The data is separate from the items to get the keys closer together
510 * during searches.
511 */
Chris Mason234b63a2007-03-13 10:46:10 -0400512struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400513 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400514 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500515} __attribute__ ((__packed__));
516
Chris Masonfec577f2007-02-26 10:40:21 -0500517/*
518 * all non-leaf blocks are nodes, they hold only keys and pointers to
519 * other blocks
520 */
Chris Mason123abc82007-03-14 14:14:43 -0400521struct btrfs_key_ptr {
522 struct btrfs_disk_key key;
523 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500524 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400525} __attribute__ ((__packed__));
526
Chris Mason234b63a2007-03-13 10:46:10 -0400527struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400528 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400529 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500530} __attribute__ ((__packed__));
531
Chris Masonfec577f2007-02-26 10:40:21 -0500532/*
Chris Mason234b63a2007-03-13 10:46:10 -0400533 * btrfs_paths remember the path taken from the root down to the leaf.
534 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500535 * to any other levels that are present.
536 *
537 * The slots array records the index of the item or block pointer
538 * used while walking the tree.
539 */
Chris Mason234b63a2007-03-13 10:46:10 -0400540struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400541 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400542 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400543 /* if there is real range locking, this locks field will change */
544 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400545 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400546 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400547 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500548
549 /*
550 * set by btrfs_split_item, tells search_slot to keep all locks
551 * and to force calls to keep space in the nodes
552 */
Chris Masonb9473432009-03-13 11:00:37 -0400553 unsigned int search_for_split:1;
554 unsigned int keep_locks:1;
555 unsigned int skip_locking:1;
556 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400557 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500558};
Chris Mason5de08d72007-02-24 06:24:44 -0500559
Chris Mason62e27492007-03-15 12:56:47 -0400560/*
561 * items in the extent btree are used to record the objectid of the
562 * owner of the block and the number of references
563 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400564
Chris Mason62e27492007-03-15 12:56:47 -0400565struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400566 __le64 refs;
567 __le64 generation;
568 __le64 flags;
569} __attribute__ ((__packed__));
570
571struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400572 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500573} __attribute__ ((__packed__));
574
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400575#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
576 sizeof(struct btrfs_item))
577
578#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
579#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
580
581/* following flags only apply to tree blocks */
582
583/* use full backrefs for extent pointers in the block */
584#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
585
Arne Jansena2de7332011-03-08 14:14:00 +0100586/*
587 * this flag is only used internally by scrub and may be changed at any time
588 * it is only declared here to avoid collisions
589 */
590#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
591
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400592struct btrfs_tree_block_info {
593 struct btrfs_disk_key key;
594 u8 level;
595} __attribute__ ((__packed__));
596
597struct btrfs_extent_data_ref {
598 __le64 root;
599 __le64 objectid;
600 __le64 offset;
601 __le32 count;
602} __attribute__ ((__packed__));
603
604struct btrfs_shared_data_ref {
605 __le32 count;
606} __attribute__ ((__packed__));
607
608struct btrfs_extent_inline_ref {
609 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400610 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400611} __attribute__ ((__packed__));
612
613/* old style backrefs item */
614struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500615 __le64 root;
616 __le64 generation;
617 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400618 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400619} __attribute__ ((__packed__));
620
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400621
Chris Mason0b86a832008-03-24 15:01:56 -0400622/* dev extents record free space on individual devices. The owner
623 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400624 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400625 */
626struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400627 __le64 chunk_tree;
628 __le64 chunk_objectid;
629 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400630 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400631 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400632} __attribute__ ((__packed__));
633
Chris Mason39544012007-12-12 14:38:19 -0500634struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400635 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500636 __le16 name_len;
637 /* name goes here */
638} __attribute__ ((__packed__));
639
Chris Mason0b86a832008-03-24 15:01:56 -0400640struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400641 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400642 __le32 nsec;
643} __attribute__ ((__packed__));
644
Jan Engelhardt95029d72009-01-21 10:49:16 -0500645enum btrfs_compression_type {
Li Zefan261507a02010-12-17 14:21:50 +0800646 BTRFS_COMPRESS_NONE = 0,
647 BTRFS_COMPRESS_ZLIB = 1,
Li Zefana6fa6fa2010-10-25 15:12:26 +0800648 BTRFS_COMPRESS_LZO = 2,
649 BTRFS_COMPRESS_TYPES = 2,
650 BTRFS_COMPRESS_LAST = 3,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500651};
Chris Masonc8b97812008-10-29 14:49:59 -0400652
Chris Mason1e1d2702007-03-15 19:03:33 -0400653struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400654 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400655 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400656 /* transid that last touched this inode */
657 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400658 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400659 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400660 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400661 __le32 nlink;
662 __le32 uid;
663 __le32 gid;
664 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400665 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500666 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400667
Chris Masonc3027eb2008-12-08 16:40:21 -0500668 /* modification sequence number for NFS */
669 __le64 sequence;
670
671 /*
672 * a little future expansion, for more than this we can
673 * just grow the inode item and version it
674 */
675 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400676 struct btrfs_timespec atime;
677 struct btrfs_timespec ctime;
678 struct btrfs_timespec mtime;
679 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400680} __attribute__ ((__packed__));
681
Chris Masone02119d2008-09-05 16:13:11 -0400682struct btrfs_dir_log_item {
683 __le64 end;
684} __attribute__ ((__packed__));
685
Chris Mason62e27492007-03-15 12:56:47 -0400686struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400687 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400688 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500689 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400690 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400691 u8 type;
692} __attribute__ ((__packed__));
693
Li Zefanb83cc962010-12-20 16:04:08 +0800694#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
695
Chris Mason62e27492007-03-15 12:56:47 -0400696struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400697 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400698 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400699 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400700 __le64 bytenr;
701 __le64 byte_limit;
702 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400703 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500704 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400705 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400706 struct btrfs_disk_key drop_progress;
707 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400708 u8 level;
Chris Mason9f5fae22007-03-20 14:38:32 -0400709} __attribute__ ((__packed__));
710
Chris Mason0660b5a2008-11-17 20:37:39 -0500711/*
712 * this is used for both forward and backward root refs
713 */
714struct btrfs_root_ref {
715 __le64 dirid;
716 __le64 sequence;
717 __le16 name_len;
718} __attribute__ ((__packed__));
719
Ilya Dryomov0940ebf2012-01-16 22:04:48 +0200720struct btrfs_disk_balance_args {
721 /*
722 * profiles to operate on, single is denoted by
723 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
724 */
725 __le64 profiles;
726
727 /* usage filter */
728 __le64 usage;
729
730 /* devid filter */
731 __le64 devid;
732
733 /* devid subset filter [pstart..pend) */
734 __le64 pstart;
735 __le64 pend;
736
737 /* btrfs virtual address space subset filter [vstart..vend) */
738 __le64 vstart;
739 __le64 vend;
740
741 /*
742 * profile to convert to, single is denoted by
743 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
744 */
745 __le64 target;
746
747 /* BTRFS_BALANCE_ARGS_* */
748 __le64 flags;
749
750 __le64 unused[8];
751} __attribute__ ((__packed__));
752
753/*
754 * store balance parameters to disk so that balance can be properly
755 * resumed after crash or unmount
756 */
757struct btrfs_balance_item {
758 /* BTRFS_BALANCE_* */
759 __le64 flags;
760
761 struct btrfs_disk_balance_args data;
762 struct btrfs_disk_balance_args meta;
763 struct btrfs_disk_balance_args sys;
764
765 __le64 unused[4];
766} __attribute__ ((__packed__));
767
Yan Zhengd899e052008-10-30 14:25:28 -0400768#define BTRFS_FILE_EXTENT_INLINE 0
769#define BTRFS_FILE_EXTENT_REG 1
770#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454d2007-04-19 13:37:44 -0400771
Chris Mason9f5fae22007-03-20 14:38:32 -0400772struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400773 /*
774 * transaction id that created this extent
775 */
Chris Mason71951f32007-03-27 09:16:29 -0400776 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400777 /*
778 * max number of bytes to hold this extent in ram
779 * when we split a compressed extent we can't know how big
780 * each of the resulting pieces will be. So, this is
781 * an upper limit on the size of the extent in ram instead of
782 * an exact limit.
783 */
784 __le64 ram_bytes;
785
786 /*
787 * 32 bits for the various ways we might encode the data,
788 * including compression and encryption. If any of these
789 * are set to something a given disk format doesn't understand
790 * it is treated like an incompat flag for reading and writing,
791 * but not for stat.
792 */
793 u8 compression;
794 u8 encryption;
795 __le16 other_encoding; /* spare for later use */
796
797 /* are we inline data or a real extent? */
Chris Mason236454d2007-04-19 13:37:44 -0400798 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400799
Chris Mason9f5fae22007-03-20 14:38:32 -0400800 /*
801 * disk space consumed by the extent, checksum blocks are included
802 * in these numbers
803 */
Chris Masondb945352007-10-15 16:15:53 -0400804 __le64 disk_bytenr;
805 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400806 /*
Chris Masondee26a92007-03-26 16:00:06 -0400807 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400808 * this extent record is for. This allows a file extent to point
809 * into the middle of an existing extent on disk, sharing it
810 * between two snapshots (useful if some bytes in the middle of the
811 * extent have changed
812 */
813 __le64 offset;
814 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400815 * the logical number of file blocks (no csums included). This
816 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400817 */
Chris Masondb945352007-10-15 16:15:53 -0400818 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400819
Chris Mason9f5fae22007-03-20 14:38:32 -0400820} __attribute__ ((__packed__));
821
Chris Masonf254e522007-03-29 15:15:27 -0400822struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400823 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400824} __attribute__ ((__packed__));
825
Chris Mason0b86a832008-03-24 15:01:56 -0400826/* different types of block groups (and chunks) */
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200827#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
828#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
829#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
830#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
831#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
832#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
833#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200834#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200835#define BTRFS_NR_RAID_TYPES 5
Chris Mason1e2677e2007-05-29 16:52:18 -0400836
Ilya Dryomov52ba6922012-01-16 22:04:47 +0200837#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
838 BTRFS_BLOCK_GROUP_SYSTEM | \
839 BTRFS_BLOCK_GROUP_METADATA)
840
841#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
842 BTRFS_BLOCK_GROUP_RAID1 | \
843 BTRFS_BLOCK_GROUP_DUP | \
844 BTRFS_BLOCK_GROUP_RAID10)
Ilya Dryomova46d11a2012-01-16 22:04:47 +0200845/*
846 * We need a bit for restriper to be able to tell when chunks of type
847 * SINGLE are available. This "extended" profile format is used in
848 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
849 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
850 * to avoid remappings between two formats in future.
851 */
852#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
853
Ilya Dryomov899c81e2012-03-27 17:09:16 +0300854#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
855 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
856
857static inline u64 chunk_to_extended(u64 flags)
858{
859 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
860 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
861
862 return flags;
863}
864static inline u64 extended_to_chunk(u64 flags)
865{
866 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
867}
868
Chris Mason9078a3e2007-04-26 16:46:15 -0400869struct btrfs_block_group_item {
870 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -0400871 __le64 chunk_objectid;
872 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -0400873} __attribute__ ((__packed__));
874
Chris Mason6324fbf2008-03-24 15:01:59 -0400875struct btrfs_space_info {
876 u64 flags;
Josef Bacik6a632092009-02-20 11:00:09 -0500877
Josef Bacik89a55892010-10-14 14:52:27 -0400878 u64 total_bytes; /* total bytes in the space,
879 this doesn't take mirrors into account */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400880 u64 bytes_used; /* total bytes used,
Lucas De Marchie9c54992011-04-26 23:28:26 -0700881 this doesn't take mirrors into account */
Josef Bacik6a632092009-02-20 11:00:09 -0500882 u64 bytes_pinned; /* total bytes pinned, will be freed when the
883 transaction finishes */
884 u64 bytes_reserved; /* total bytes the allocator has reserved for
885 current allocations */
886 u64 bytes_readonly; /* total bytes that are read only */
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400887
Josef Bacik6a632092009-02-20 11:00:09 -0500888 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400889 delalloc/allocations */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400890 u64 disk_used; /* total bytes used on disk */
Josef Bacik89a55892010-10-14 14:52:27 -0400891 u64 disk_total; /* total bytes on disk, takes mirrors into
892 account */
Josef Bacik6a632092009-02-20 11:00:09 -0500893
Chris Mason36e39c42011-03-12 07:08:42 -0500894 /*
895 * we bump reservation progress every time we decrement
896 * bytes_reserved. This way people waiting for reservations
897 * know something good has happened and they can check
898 * for progress. The number here isn't to be trusted, it
899 * just shows reclaim activity
900 */
901 unsigned long reservation_progress;
902
David Sterba4ea02882011-05-12 18:13:12 +0200903 unsigned int full:1; /* indicates that we cannot allocate any more
Josef Bacik6a632092009-02-20 11:00:09 -0500904 chunks for this space */
David Sterba4ea02882011-05-12 18:13:12 +0200905 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
Josef Bacik6d741192011-04-11 20:20:11 -0400906
Josef Bacikfdb5eff2011-06-07 16:07:44 -0400907 unsigned int flush:1; /* set if we are trying to make space */
908
David Sterba4ea02882011-05-12 18:13:12 +0200909 unsigned int force_alloc; /* set if we need to force a chunk
910 alloc for this space */
Josef Bacik6a632092009-02-20 11:00:09 -0500911
Chris Mason6324fbf2008-03-24 15:01:59 -0400912 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400913
914 /* for block groups in our same type */
Yan, Zhengb742bb82010-05-16 10:46:24 -0400915 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
Josef Bacik0f9dd462008-09-23 13:14:11 -0400916 spinlock_t lock;
Josef Bacik80eb2342008-10-29 14:49:05 -0400917 struct rw_semaphore groups_sem;
Josef Bacikfdb5eff2011-06-07 16:07:44 -0400918 wait_queue_head_t wait;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400919};
920
Yan, Zhengf0486c62010-05-16 10:46:25 -0400921struct btrfs_block_rsv {
922 u64 size;
923 u64 reserved;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400924 struct btrfs_space_info *space_info;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400925 spinlock_t lock;
David Sterbac08782d2012-01-26 15:01:12 -0500926 unsigned int full;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400927};
928
Chris Masonfa9c0d72009-04-03 09:47:43 -0400929/*
930 * free clusters are used to claim free space in relatively large chunks,
931 * allowing us to do less seeky writes. They are used for all metadata
932 * allocations and data allocations in ssd mode.
933 */
934struct btrfs_free_cluster {
935 spinlock_t lock;
936 spinlock_t refill_lock;
937 struct rb_root root;
938
939 /* largest extent in this cluster */
940 u64 max_size;
941
942 /* first extent starting offset */
943 u64 window_start;
944
945 struct btrfs_block_group_cache *block_group;
946 /*
947 * when a cluster is allocated from a block group, we put the
948 * cluster onto a list in the block group so that it can
949 * be freed before the block group is freed.
950 */
951 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -0400952};
953
Josef Bacik817d52f2009-07-13 21:29:25 -0400954enum btrfs_caching_type {
955 BTRFS_CACHE_NO = 0,
956 BTRFS_CACHE_STARTED = 1,
Josef Bacik291c7d22011-11-14 13:52:14 -0500957 BTRFS_CACHE_FAST = 2,
958 BTRFS_CACHE_FINISHED = 3,
Josef Bacik817d52f2009-07-13 21:29:25 -0400959};
960
Josef Bacik0af3d002010-06-21 14:48:16 -0400961enum btrfs_disk_cache_state {
962 BTRFS_DC_WRITTEN = 0,
963 BTRFS_DC_ERROR = 1,
964 BTRFS_DC_CLEAR = 2,
965 BTRFS_DC_SETUP = 3,
966 BTRFS_DC_NEED_WRITE = 4,
967};
968
Yan Zheng11833d62009-09-11 16:11:19 -0400969struct btrfs_caching_control {
970 struct list_head list;
971 struct mutex mutex;
972 wait_queue_head_t wait;
Josef Bacikbab39bf2011-06-30 14:42:28 -0400973 struct btrfs_work work;
Yan Zheng11833d62009-09-11 16:11:19 -0400974 struct btrfs_block_group_cache *block_group;
975 u64 progress;
976 atomic_t count;
977};
978
Chris Mason9078a3e2007-04-26 16:46:15 -0400979struct btrfs_block_group_cache {
980 struct btrfs_key key;
981 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -0400982 struct btrfs_fs_info *fs_info;
Josef Bacik0af3d002010-06-21 14:48:16 -0400983 struct inode *inode;
Chris Masonc286ac42008-07-22 23:06:41 -0400984 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -0500985 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -0400986 u64 reserved;
Josef Bacik1b2da372009-09-11 16:11:20 -0400987 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -0400988 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -0400989 u64 sectorsize;
Josef Bacik5b0e95b2011-10-06 08:58:24 -0400990 u64 cache_generation;
Mariusz Kozlowski0410c942010-11-20 12:03:07 +0000991 unsigned int ro:1;
992 unsigned int dirty:1;
993 unsigned int iref:1;
Josef Bacik0af3d002010-06-21 14:48:16 -0400994
995 int disk_cache_state;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400996
Josef Bacik817d52f2009-07-13 21:29:25 -0400997 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -0400998 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -0400999 struct btrfs_caching_control *caching_ctl;
1000 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -04001001
Josef Bacik0f9dd462008-09-23 13:14:11 -04001002 struct btrfs_space_info *space_info;
1003
1004 /* free space cache stuff */
Li Zefan34d52cb2011-03-29 13:46:06 +08001005 struct btrfs_free_space_ctl *free_space_ctl;
Josef Bacik0f9dd462008-09-23 13:14:11 -04001006
1007 /* block group cache stuff */
1008 struct rb_node cache_node;
1009
1010 /* for block groups in the same raid type */
1011 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -05001012
1013 /* usage count */
1014 atomic_t count;
Chris Masonfa9c0d72009-04-03 09:47:43 -04001015
1016 /* List of struct btrfs_free_clusters for this block group.
1017 * Today it will only have one thing on it, but that may change
1018 */
1019 struct list_head cluster_list;
Chris Mason9078a3e2007-04-26 16:46:15 -04001020};
Chris Mason0b86a832008-03-24 15:01:56 -04001021
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001022struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -04001023struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -04001024struct btrfs_fs_devices;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001025struct btrfs_balance_control;
Miao Xie16cdcec2011-04-22 18:12:22 +08001026struct btrfs_delayed_root;
Chris Mason9f5fae22007-03-20 14:38:32 -04001027struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -04001028 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -04001029 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -04001030 struct btrfs_root *extent_root;
1031 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -04001032 struct btrfs_root *chunk_root;
1033 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -05001034 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -05001035 struct btrfs_root *csum_root;
Chris Masone02119d2008-09-05 16:13:11 -04001036
1037 /* the log root tree is a directory of all the other log roots */
1038 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001039
1040 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -04001041 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -04001042
Josef Bacik0f9dd462008-09-23 13:14:11 -04001043 /* block group cache stuff */
1044 spinlock_t block_group_cache_lock;
1045 struct rb_root block_group_cache_tree;
1046
Josef Bacik2bf64752011-09-26 17:12:22 -04001047 /* keep track of unallocated space */
1048 spinlock_t free_chunk_lock;
1049 u64 free_chunk_space;
1050
Yan Zheng11833d62009-09-11 16:11:19 -04001051 struct extent_io_tree freed_extents[2];
1052 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -04001053
Chris Mason0b86a832008-03-24 15:01:56 -04001054 /* logical->physical extent mapping */
1055 struct btrfs_mapping_tree mapping_tree;
1056
Miao Xie16cdcec2011-04-22 18:12:22 +08001057 /*
1058 * block reservation for extent, checksum, root tree and
1059 * delayed dir index item
1060 */
Yan, Zhengf0486c62010-05-16 10:46:25 -04001061 struct btrfs_block_rsv global_block_rsv;
1062 /* block reservation for delay allocation */
1063 struct btrfs_block_rsv delalloc_block_rsv;
1064 /* block reservation for metadata operations */
1065 struct btrfs_block_rsv trans_block_rsv;
1066 /* block reservation for chunk tree */
1067 struct btrfs_block_rsv chunk_block_rsv;
Josef Bacik6d668dd2011-11-03 22:54:25 -04001068 /* block reservation for delayed operations */
1069 struct btrfs_block_rsv delayed_block_rsv;
Yan, Zhengf0486c62010-05-16 10:46:25 -04001070
1071 struct btrfs_block_rsv empty_block_rsv;
1072
Chris Mason293ffd52007-03-20 15:57:25 -04001073 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -04001074 u64 last_trans_committed;
Chris Mason12fcfd22009-03-24 10:24:20 -04001075
1076 /*
1077 * this is updated to the current trans every time a full commit
1078 * is required instead of the faster short fsync log commits
1079 */
1080 u64 last_trans_log_full_commit;
Stefan Behrens25cd9992012-03-30 13:58:32 +02001081 unsigned long mount_opt;
Li Zefan261507a02010-12-17 14:21:50 +08001082 unsigned long compress_type:4;
Chris Mason6f568d32008-01-29 16:03:38 -05001083 u64 max_inline;
Chris Mason8f662a72008-01-02 10:01:11 -05001084 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -04001085 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001086 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -04001087 wait_queue_head_t transaction_wait;
Sage Weilbb9c12c2010-10-29 15:37:34 -04001088 wait_queue_head_t transaction_blocked_wait;
Chris Mason771ed682008-11-06 22:02:51 -05001089 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -04001090
David Sterba6c417612011-04-13 15:41:04 +02001091 struct btrfs_super_block *super_copy;
1092 struct btrfs_super_block *super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -04001093 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -04001094 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -04001095 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -04001096 struct backing_dev_info bdi;
Chris Masone02119d2008-09-05 16:13:11 -04001097 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -04001098 struct mutex transaction_kthread_mutex;
1099 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -04001100 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -04001101 struct mutex volume_mutex;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001102 /*
1103 * this protects the ordered operations list only while we are
1104 * processing all of the entries on it. This way we make
1105 * sure the commit code doesn't find the list temporarily empty
1106 * because another function happens to be doing non-waiting preflush
1107 * before jumping into the main commit.
1108 */
1109 struct mutex ordered_operations_mutex;
Yan Zheng11833d62009-09-11 16:11:19 -04001110 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001111
Yan, Zhengc71bf092009-11-12 09:34:40 +00001112 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001113
Yan, Zhengc71bf092009-11-12 09:34:40 +00001114 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -04001115 struct srcu_struct subvol_srcu;
1116
Josef Bacika4abeea2011-04-11 17:25:13 -04001117 spinlock_t trans_lock;
Chris Mason75857172011-06-13 20:00:16 -04001118 /*
1119 * the reloc mutex goes with the trans lock, it is taken
1120 * during commit to protect us from the relocation code
1121 */
1122 struct mutex reloc_mutex;
1123
Chris Mason8fd17792007-04-19 21:01:03 -04001124 struct list_head trans_list;
Chris Mason19c00dd2007-10-15 16:19:22 -04001125 struct list_head hashers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001126 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -04001127 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -04001128
Yan, Zheng24bbcf02009-11-12 09:36:34 +00001129 spinlock_t delayed_iput_lock;
1130 struct list_head delayed_iputs;
1131
Chris Masoncb03c742008-05-15 16:15:45 -04001132 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -04001133 atomic_t async_submit_draining;
Chris Mason0986fe92008-08-15 15:34:15 -04001134 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -05001135 atomic_t async_delalloc_pages;
Josef Bacika4abeea2011-04-11 17:25:13 -04001136 atomic_t open_ioctl_trans;
Chris Masonce9adaa2008-04-09 16:28:12 -04001137
Chris Mason8b712842008-06-11 16:50:36 -04001138 /*
Chris Mason3eaa2882008-07-24 11:57:52 -04001139 * this is used by the balancing code to wait for all the pending
1140 * ordered extents
1141 */
1142 spinlock_t ordered_extent_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001143
1144 /*
1145 * all of the data=ordered extents pending writeback
1146 * these can span multiple transactions and basically include
1147 * every dirty data page that isn't from nodatacow
1148 */
Chris Mason3eaa2882008-07-24 11:57:52 -04001149 struct list_head ordered_extents;
Chris Mason5a3f23d2009-03-31 13:27:11 -04001150
1151 /*
1152 * all of the inodes that have delalloc bytes. It is possible for
1153 * this list to be empty even when there is still dirty data=ordered
1154 * extents waiting to finish IO.
1155 */
Chris Masonea8c2812008-08-04 23:17:27 -04001156 struct list_head delalloc_inodes;
Chris Mason3eaa2882008-07-24 11:57:52 -04001157
1158 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -04001159 * special rename and truncate targets that must be on disk before
1160 * we're allowed to commit. This is basically the ext3 style
1161 * data=ordered list.
1162 */
1163 struct list_head ordered_operations;
1164
1165 /*
Chris Mason8b712842008-06-11 16:50:36 -04001166 * there is a pool of worker threads for checksumming during writes
1167 * and a pool for checksumming after reads. This is because readers
1168 * can run with FS locks held, and the writers may be waiting for
1169 * those locks. We don't want ordering in the pending list to cause
1170 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -04001171 *
1172 * A third pool does submit_bio to avoid deadlocking with the other
1173 * two
Chris Mason8b712842008-06-11 16:50:36 -04001174 */
Chris Mason61d92c32009-10-02 19:11:56 -04001175 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -04001176 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -05001177 struct btrfs_workers delalloc_workers;
Chris Mason8b712842008-06-11 16:50:36 -04001178 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -05001179 struct btrfs_workers endio_meta_workers;
Chris Masoncad321a2008-12-17 14:51:42 -05001180 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -04001181 struct btrfs_workers endio_write_workers;
Josef Bacik0cb59c92010-07-02 12:14:14 -04001182 struct btrfs_workers endio_freespace_worker;
Chris Mason1cc127b2008-06-12 14:46:17 -04001183 struct btrfs_workers submit_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001184 struct btrfs_workers caching_workers;
Arne Jansen90519d62011-05-23 14:30:00 +02001185 struct btrfs_workers readahead_workers;
Josef Bacikbab39bf2011-06-30 14:42:28 -04001186
Chris Mason247e7432008-07-17 12:53:51 -04001187 /*
1188 * fixup workers take dirty pages that didn't properly go through
1189 * the cow mechanism and make them safe to write. It happens
1190 * for the sys_munmap function call path
1191 */
1192 struct btrfs_workers fixup_workers;
Miao Xie16cdcec2011-04-22 18:12:22 +08001193 struct btrfs_workers delayed_workers;
Chris Masona74a4b92008-06-25 16:01:31 -04001194 struct task_struct *transaction_kthread;
1195 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -04001196 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -04001197
Josef Bacik58176a92007-08-29 15:47:34 -04001198 struct kobject super_kobj;
1199 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -04001200 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -04001201 int closing;
Chris Masone02119d2008-09-05 16:13:11 -04001202 int log_root_recovering;
Yan, Zhenga22285a2010-05-16 10:48:46 -04001203 int enospc_unlink;
Josef Bacika4abeea2011-04-11 17:25:13 -04001204 int trans_no_join;
Chris Mason62e27492007-03-15 12:56:47 -04001205
Yan324ae4d2007-11-16 14:57:08 -05001206 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -04001207
1208 /* protected by the delalloc lock, used to keep from writing
1209 * metadata until there is a nice batch
1210 */
1211 u64 dirty_metadata_bytes;
Chris Mason0b86a832008-03-24 15:01:56 -04001212 struct list_head dirty_cowonly_roots;
1213
Chris Mason8a4b83c2008-03-24 15:02:07 -04001214 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -04001215
1216 /*
1217 * the space_info list is almost entirely read only. It only changes
1218 * when we add a new raid type to the FS, and that happens
1219 * very rarely. RCU is used to protect it.
1220 */
Chris Mason6324fbf2008-03-24 15:01:59 -04001221 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -04001222
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001223 struct reloc_control *reloc_ctl;
1224
Chris Mason1832a6d2007-12-21 16:27:21 -05001225 spinlock_t delalloc_lock;
1226 u64 delalloc_bytes;
Chris Masonfa9c0d72009-04-03 09:47:43 -04001227
1228 /* data_alloc_cluster is only used in ssd mode */
1229 struct btrfs_free_cluster data_alloc_cluster;
1230
1231 /* all metadata allocations go through this cluster */
1232 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -04001233
Chris Mason4cb53002011-05-24 15:35:30 -04001234 /* auto defrag inodes go here */
1235 spinlock_t defrag_inodes_lock;
1236 struct rb_root defrag_inodes;
1237 atomic_t defrag_running;
1238
Yan Zheng31153d82008-07-28 15:32:19 -04001239 spinlock_t ref_cache_lock;
1240 u64 total_ref_cache_size;
Yan Zheng31153d82008-07-28 15:32:19 -04001241
Ilya Dryomova46d11a2012-01-16 22:04:47 +02001242 /*
1243 * these three are in extended format (availability of single
1244 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1245 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1246 */
Chris Masond18a2c42008-04-04 15:40:00 -04001247 u64 avail_data_alloc_bits;
1248 u64 avail_metadata_alloc_bits;
1249 u64 avail_system_alloc_bits;
Chris Mason788f20e2008-04-28 15:29:42 -04001250
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001251 /* restriper state */
1252 spinlock_t balance_lock;
1253 struct mutex balance_mutex;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001254 atomic_t balance_running;
1255 atomic_t balance_pause_req;
Ilya Dryomova7e99c62012-01-16 22:04:49 +02001256 atomic_t balance_cancel_req;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001257 struct btrfs_balance_control *balance_ctl;
Ilya Dryomov837d5b62012-01-16 22:04:49 +02001258 wait_queue_head_t balance_wait_q;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +02001259
Josef Bacik97e728d2009-04-21 17:40:57 -04001260 unsigned data_chunk_allocations;
1261 unsigned metadata_ratio;
1262
Chris Mason788f20e2008-04-28 15:29:42 -04001263 void *bdev_holder;
liuboacce9522011-01-06 19:30:25 +08001264
Arne Jansena2de7332011-03-08 14:14:00 +01001265 /* private scrub information */
1266 struct mutex scrub_lock;
1267 atomic_t scrubs_running;
1268 atomic_t scrub_pause_req;
1269 atomic_t scrubs_paused;
1270 atomic_t scrub_cancel_req;
1271 wait_queue_head_t scrub_pause_wait;
1272 struct rw_semaphore scrub_super_lock;
1273 int scrub_workers_refcnt;
1274 struct btrfs_workers scrub_workers;
1275
Stefan Behrens21adbd52011-11-09 13:44:05 +01001276#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1277 u32 check_integrity_print_mask;
1278#endif
1279
liuboacce9522011-01-06 19:30:25 +08001280 /* filesystem state */
1281 u64 fs_state;
Miao Xie16cdcec2011-04-22 18:12:22 +08001282
1283 struct btrfs_delayed_root *delayed_root;
Chris Masonaf31f5e2011-11-03 15:17:42 -04001284
Arne Jansen90519d62011-05-23 14:30:00 +02001285 /* readahead tree */
1286 spinlock_t reada_lock;
1287 struct radix_tree_root reada_tree;
Chris Mason531f4b12011-11-06 03:05:08 -05001288
Chris Masonaf31f5e2011-11-03 15:17:42 -04001289 /* next backup root to be overwritten */
1290 int backup_root_index;
Yan324ae4d2007-11-16 14:57:08 -05001291};
Chris Mason0b86a832008-03-24 15:01:56 -04001292
Chris Mason62e27492007-03-15 12:56:47 -04001293/*
1294 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -04001295 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -04001296 */
1297struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -04001298 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -04001299
Chris Mason5f39d392007-10-15 16:14:19 -04001300 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001301 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001302 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001303
Chris Mason62e27492007-03-15 12:56:47 -04001304 struct btrfs_root_item root_item;
1305 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001306 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001307 struct extent_io_tree dirty_log_pages;
1308
Josef Bacik58176a92007-08-29 15:47:34 -04001309 struct kobject root_kobj;
1310 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001311 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001312
Yan, Zhengf0486c62010-05-16 10:46:25 -04001313 spinlock_t accounting_lock;
1314 struct btrfs_block_rsv *block_rsv;
1315
Li Zefan581bb052011-04-20 10:06:11 +08001316 /* free ino cache stuff */
1317 struct mutex fs_commit_mutex;
1318 struct btrfs_free_space_ctl *free_ino_ctl;
1319 enum btrfs_caching_type cached;
1320 spinlock_t cache_lock;
1321 wait_queue_head_t cache_wait;
1322 struct btrfs_free_space_ctl *free_ino_pinned;
1323 u64 cache_progress;
Li Zefan82d59022011-04-20 10:33:24 +08001324 struct inode *cache_inode;
Li Zefan581bb052011-04-20 10:06:11 +08001325
Chris Masone02119d2008-09-05 16:13:11 -04001326 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001327 wait_queue_head_t log_writer_wait;
1328 wait_queue_head_t log_commit_wait[2];
1329 atomic_t log_writers;
1330 atomic_t log_commit[2];
1331 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001332 unsigned long last_log_commit;
Yan Zheng7237f182009-01-21 12:54:03 -05001333 unsigned long log_batch;
Josef Bacikff782e02009-10-08 15:30:04 -04001334 pid_t log_start_pid;
1335 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001336
Chris Mason0f7d52f2007-04-09 10:42:37 -04001337 u64 objectid;
1338 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001339
1340 /* data allocations are done in sectorsize units */
1341 u32 sectorsize;
1342
1343 /* node allocations are done in nodesize units */
1344 u32 nodesize;
1345
1346 /* leaf allocations are done in leafsize units */
1347 u32 leafsize;
1348
Chris Mason87ee04e2007-11-30 11:30:34 -05001349 u32 stripesize;
1350
Chris Mason9f5fae22007-03-20 14:38:32 -04001351 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001352
1353 u64 highest_objectid;
Chris Mason75857172011-06-13 20:00:16 -04001354
1355 /* btrfs_record_root_in_trans is a multi-step process,
1356 * and it can race with the balancing code. But the
1357 * race is very small, and only the first time the root
1358 * is added to each transaction. So in_trans_setup
1359 * is used to tell us when more checks are required
1360 */
1361 unsigned long in_trans_setup;
Chris Mason9f3a7422007-08-07 15:52:19 -04001362 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001363 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001364 int in_radix;
1365
Chris Mason3f157a22008-06-25 16:01:31 -04001366 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001367 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001368 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001369 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001370 char *name;
Chris Mason0b86a832008-03-24 15:01:56 -04001371
1372 /* the dirty list is only used by non-reference counted roots */
1373 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001374
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001375 struct list_head root_list;
1376
Yan, Zhengd68fc572010-05-16 10:49:58 -04001377 spinlock_t orphan_lock;
Josef Bacik7b128762008-07-24 12:17:14 -04001378 struct list_head orphan_list;
Yan, Zhengd68fc572010-05-16 10:49:58 -04001379 struct btrfs_block_rsv *orphan_block_rsv;
1380 int orphan_item_inserted;
1381 int orphan_cleanup_state;
Chris Mason3394e162008-11-17 20:42:26 -05001382
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001383 spinlock_t inode_lock;
1384 /* red-black tree that keeps track of in-memory inodes */
1385 struct rb_root inode_tree;
1386
Chris Mason3394e162008-11-17 20:42:26 -05001387 /*
Miao Xie16cdcec2011-04-22 18:12:22 +08001388 * radix tree that keeps track of delayed nodes of every inode,
1389 * protected by inode_lock
1390 */
1391 struct radix_tree_root delayed_nodes_tree;
1392 /*
Chris Mason3394e162008-11-17 20:42:26 -05001393 * right now this just gets used so that a root has its own devid
1394 * for stat. It may be used for more later
1395 */
Al Viro0ee5dc62011-07-07 15:44:25 -04001396 dev_t anon_dev;
Liu Bof1ebcc72011-11-14 20:48:06 -05001397
1398 int force_cow;
Chris Mason62e27492007-03-15 12:56:47 -04001399};
1400
Chris Mason4cb53002011-05-24 15:35:30 -04001401struct btrfs_ioctl_defrag_range_args {
1402 /* start of the defrag operation */
1403 __u64 start;
1404
1405 /* number of bytes to defrag, use (u64)-1 to say all */
1406 __u64 len;
1407
1408 /*
1409 * flags for the operation, which can include turning
1410 * on compression for this one defrag
1411 */
1412 __u64 flags;
1413
1414 /*
1415 * any extent bigger than this will be considered
1416 * already defragged. Use 0 to take the kernel default
1417 * Use 1 to say every single extent must be rewritten
1418 */
1419 __u32 extent_thresh;
1420
1421 /*
1422 * which compression method to use if turning on compression
1423 * for this defrag operation. If unspecified, zlib will
1424 * be used
1425 */
1426 __u32 compress_type;
1427
1428 /* spare for later */
1429 __u32 unused[4];
1430};
1431
1432
Chris Mason1e1d2702007-03-15 19:03:33 -04001433/*
1434 * inode items have the data typically returned from stat and store other
1435 * info about object characteristics. There is one for every file and dir in
1436 * the FS
1437 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001438#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001439#define BTRFS_INODE_REF_KEY 12
1440#define BTRFS_XATTR_ITEM_KEY 24
1441#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001442/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001443
1444/*
1445 * dir items are the name -> inode pointers in a directory. There is one
1446 * for every name in a directory.
1447 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001448#define BTRFS_DIR_LOG_ITEM_KEY 60
1449#define BTRFS_DIR_LOG_INDEX_KEY 72
1450#define BTRFS_DIR_ITEM_KEY 84
1451#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001452/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001453 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001454 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001455#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001456
Chris Mason1e1d2702007-03-15 19:03:33 -04001457/*
Chris Masond20f7042008-12-08 16:58:54 -05001458 * extent csums are stored in a separate tree and hold csums for
1459 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001460 */
Chris Masond20f7042008-12-08 16:58:54 -05001461#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001462
1463/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001464 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001465 * tree used by the super block to find all the other trees
1466 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001467#define BTRFS_ROOT_ITEM_KEY 132
1468
1469/*
1470 * root backrefs tie subvols and snapshots to the directory entries that
1471 * reference them
1472 */
1473#define BTRFS_ROOT_BACKREF_KEY 144
1474
1475/*
1476 * root refs make a fast index for listing all of the snapshots and
1477 * subvolumes referenced by a given root. They point directly to the
1478 * directory item in the root that references the subvol
1479 */
1480#define BTRFS_ROOT_REF_KEY 156
1481
Chris Mason1e1d2702007-03-15 19:03:33 -04001482/*
1483 * extent items are in the extent map tree. These record which blocks
1484 * are used, and how many references there are to each block
1485 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001486#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001487
1488#define BTRFS_TREE_BLOCK_REF_KEY 176
1489
1490#define BTRFS_EXTENT_DATA_REF_KEY 178
1491
1492#define BTRFS_EXTENT_REF_V0_KEY 180
1493
1494#define BTRFS_SHARED_BLOCK_REF_KEY 182
1495
1496#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001497
1498/*
1499 * block groups give us hints into the extent allocation trees. Which
1500 * blocks are free etc etc
1501 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001502#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001503
Chris Mason0660b5a2008-11-17 20:37:39 -05001504#define BTRFS_DEV_EXTENT_KEY 204
1505#define BTRFS_DEV_ITEM_KEY 216
1506#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001507
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02001508#define BTRFS_BALANCE_ITEM_KEY 248
1509
Chris Mason9f5fae22007-03-20 14:38:32 -04001510/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001511 * string items are for debugging. They just store a short string of
1512 * data in the FS
1513 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001514#define BTRFS_STRING_ITEM_KEY 253
1515
David Sterba0942caa2011-06-28 15:10:37 +00001516/*
1517 * Flags for mount options.
1518 *
1519 * Note: don't forget to add new options to btrfs_show_options()
1520 */
Chris Mason21ad10c2008-01-09 09:23:21 -05001521#define BTRFS_MOUNT_NODATASUM (1 << 0)
1522#define BTRFS_MOUNT_NODATACOW (1 << 1)
1523#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001524#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001525#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001526#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001527#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001528#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001529#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001530#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001531#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masona555f812010-01-28 16:18:15 -05001532#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
Josef Bacik0af3d002010-06-21 14:48:16 -04001533#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
Josef Bacik88c2ba32010-09-21 14:21:34 -04001534#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
Sage Weil4260f7c2010-10-29 15:46:43 -04001535#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
Chris Mason91435652011-02-16 13:10:41 -05001536#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
Chris Mason4cb53002011-05-24 15:35:30 -04001537#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
Chris Mason4b9465c2011-06-03 09:36:29 -04001538#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
Chris Masonaf31f5e2011-11-03 15:17:42 -04001539#define BTRFS_MOUNT_RECOVERY (1 << 18)
Ilya Dryomov9555c6c2012-01-16 22:04:48 +02001540#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
Chris Masonc126dea2012-01-16 15:27:58 -05001541#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1542#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
Jeff Mahoney8c342932011-10-03 23:22:31 -04001543#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001544
1545#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1546#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1547#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1548 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05001549/*
1550 * Inode flags
1551 */
Yanfdebe2b2008-01-14 13:26:08 -05001552#define BTRFS_INODE_NODATASUM (1 << 0)
1553#define BTRFS_INODE_NODATACOW (1 << 1)
1554#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001555#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001556#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001557#define BTRFS_INODE_SYNC (1 << 5)
1558#define BTRFS_INODE_IMMUTABLE (1 << 6)
1559#define BTRFS_INODE_APPEND (1 << 7)
1560#define BTRFS_INODE_NODUMP (1 << 8)
1561#define BTRFS_INODE_NOATIME (1 << 9)
1562#define BTRFS_INODE_DIRSYNC (1 << 10)
Liu Bo75e7cb72011-03-22 10:12:20 +00001563#define BTRFS_INODE_COMPRESS (1 << 11)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001564
Li Zefan08fe4db2011-03-28 02:01:25 +00001565#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1566
Chris Masoncfed81a2012-03-03 07:40:03 -05001567struct btrfs_map_token {
1568 struct extent_buffer *eb;
1569 char *kaddr;
1570 unsigned long offset;
1571};
1572
1573static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1574{
1575 memset(token, 0, sizeof(*token));
1576}
1577
Chris Mason5f39d392007-10-15 16:14:19 -04001578/* some macros to generate set/get funcs for the struct fields. This
1579 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1580 * one for u8:
1581 */
1582#define le8_to_cpu(v) (v)
1583#define cpu_to_le8(v) (v)
1584#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001585
Chris Mason5f39d392007-10-15 16:14:19 -04001586#define read_eb_member(eb, ptr, type, member, result) ( \
1587 read_extent_buffer(eb, (char *)(result), \
1588 ((unsigned long)(ptr)) + \
1589 offsetof(type, member), \
1590 sizeof(((type *)0)->member)))
1591
1592#define write_eb_member(eb, ptr, type, member, result) ( \
1593 write_extent_buffer(eb, (char *)(result), \
1594 ((unsigned long)(ptr)) + \
1595 offsetof(type, member), \
1596 sizeof(((type *)0)->member)))
1597
Chris Mason0f827312007-10-15 16:18:56 -04001598#ifndef BTRFS_SETGET_FUNCS
Chris Mason5f39d392007-10-15 16:14:19 -04001599#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Chris Mason0f827312007-10-15 16:18:56 -04001600u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
Chris Masoncfed81a2012-03-03 07:40:03 -05001601u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1602void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
Chris Mason0f827312007-10-15 16:18:56 -04001603void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1604#endif
Chris Mason9078a3e2007-04-26 16:46:15 -04001605
Chris Mason5f39d392007-10-15 16:14:19 -04001606#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1607static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1608{ \
Chris Mason727011e2010-08-06 13:21:20 -04001609 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001610 u##bits res = le##bits##_to_cpu(p->member); \
Chris Mason810191f2007-10-15 16:18:55 -04001611 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001612} \
1613static inline void btrfs_set_##name(struct extent_buffer *eb, \
1614 u##bits val) \
1615{ \
Chris Mason727011e2010-08-06 13:21:20 -04001616 type *p = page_address(eb->pages[0]); \
David Millerdf68b8a2008-02-15 10:40:52 -05001617 p->member = cpu_to_le##bits(val); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001618}
Chris Mason1e1d2702007-03-15 19:03:33 -04001619
Chris Mason5f39d392007-10-15 16:14:19 -04001620#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1621static inline u##bits btrfs_##name(type *s) \
1622{ \
1623 return le##bits##_to_cpu(s->member); \
1624} \
1625static inline void btrfs_set_##name(type *s, u##bits val) \
1626{ \
1627 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001628}
1629
Chris Mason0b86a832008-03-24 15:01:56 -04001630BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1631BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1632BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1633BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1634BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001635BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1636 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001637BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1638BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001639BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1640BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1641BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001642BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001643
Chris Mason8a4b83c2008-03-24 15:02:07 -04001644BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1645BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1646 total_bytes, 64);
1647BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1648 bytes_used, 64);
1649BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1650 io_align, 32);
1651BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1652 io_width, 32);
1653BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1654 sector_size, 32);
1655BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001656BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1657 dev_group, 32);
1658BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1659 seek_speed, 8);
1660BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1661 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001662BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1663 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001664
Chris Mason0b86a832008-03-24 15:01:56 -04001665static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1666{
1667 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1668}
1669
Yan Zheng2b820322008-11-17 21:11:30 -05001670static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1671{
1672 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1673}
1674
Chris Masone17cade2008-04-15 15:41:47 -04001675BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001676BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1677BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1678BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1679BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1680BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1681BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1682BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001683BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001684BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1685BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1686
Chris Masone17cade2008-04-15 15:41:47 -04001687static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1688{
1689 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1690}
1691
1692BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001693BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1694BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1695 stripe_len, 64);
1696BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1697 io_align, 32);
1698BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1699 io_width, 32);
1700BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1701 sector_size, 32);
1702BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1703BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1704 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001705BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1706 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001707BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1708BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1709
1710static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1711 int nr)
1712{
1713 unsigned long offset = (unsigned long)c;
1714 offset += offsetof(struct btrfs_chunk, stripe);
1715 offset += nr * sizeof(struct btrfs_stripe);
1716 return (struct btrfs_stripe *)offset;
1717}
1718
Chris Masona4437552008-04-18 10:29:38 -04001719static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1720{
1721 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1722}
1723
Chris Mason0b86a832008-03-24 15:01:56 -04001724static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1725 struct btrfs_chunk *c, int nr)
1726{
1727 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1728}
1729
Chris Mason0b86a832008-03-24 15:01:56 -04001730static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1731 struct btrfs_chunk *c, int nr)
1732{
1733 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1734}
1735
Chris Mason5f39d392007-10-15 16:14:19 -04001736/* struct btrfs_block_group_item */
1737BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1738 used, 64);
1739BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1740 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001741BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1742 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001743
1744BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001745 struct btrfs_block_group_item, chunk_objectid, 64);
1746BTRFS_SETGET_FUNCS(disk_block_group_flags,
1747 struct btrfs_block_group_item, flags, 64);
1748BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1749 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001750
Chris Mason39544012007-12-12 14:38:19 -05001751/* struct btrfs_inode_ref */
1752BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001753BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001754
Chris Mason5f39d392007-10-15 16:14:19 -04001755/* struct btrfs_inode_item */
1756BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001757BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001758BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001759BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001760BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001761BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1762BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1763BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1764BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1765BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04001766BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001767BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001768
Chris Mason0b86a832008-03-24 15:01:56 -04001769static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001770btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001771{
Chris Mason5f39d392007-10-15 16:14:19 -04001772 unsigned long ptr = (unsigned long)inode_item;
1773 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04001774 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001775}
1776
Chris Mason0b86a832008-03-24 15:01:56 -04001777static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001778btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001779{
Chris Mason5f39d392007-10-15 16:14:19 -04001780 unsigned long ptr = (unsigned long)inode_item;
1781 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04001782 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001783}
1784
Chris Mason0b86a832008-03-24 15:01:56 -04001785static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001786btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001787{
Chris Mason5f39d392007-10-15 16:14:19 -04001788 unsigned long ptr = (unsigned long)inode_item;
1789 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04001790 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001791}
1792
Chris Mason0b86a832008-03-24 15:01:56 -04001793BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1794BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001795
Chris Mason0b86a832008-03-24 15:01:56 -04001796/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04001797BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1798 chunk_tree, 64);
1799BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1800 chunk_objectid, 64);
1801BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1802 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001803BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1804
Chris Masone17cade2008-04-15 15:41:47 -04001805static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1806{
1807 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1808 return (u8 *)((unsigned long)dev + ptr);
1809}
1810
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001811BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1812BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1813 generation, 64);
1814BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001815
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001816BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001817
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001818
1819BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1820
1821static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1822 struct btrfs_tree_block_info *item,
1823 struct btrfs_disk_key *key)
1824{
1825 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1826}
1827
1828static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1829 struct btrfs_tree_block_info *item,
1830 struct btrfs_disk_key *key)
1831{
1832 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1833}
1834
1835BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1836 root, 64);
1837BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1838 objectid, 64);
1839BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1840 offset, 64);
1841BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1842 count, 32);
1843
1844BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1845 count, 32);
1846
1847BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1848 type, 8);
1849BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1850 offset, 64);
1851
1852static inline u32 btrfs_extent_inline_ref_size(int type)
1853{
1854 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1855 type == BTRFS_SHARED_BLOCK_REF_KEY)
1856 return sizeof(struct btrfs_extent_inline_ref);
1857 if (type == BTRFS_SHARED_DATA_REF_KEY)
1858 return sizeof(struct btrfs_shared_data_ref) +
1859 sizeof(struct btrfs_extent_inline_ref);
1860 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1861 return sizeof(struct btrfs_extent_data_ref) +
1862 offsetof(struct btrfs_extent_inline_ref, offset);
1863 BUG();
1864 return 0;
1865}
1866
1867BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1868BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1869 generation, 64);
1870BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1871BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001872
1873/* struct btrfs_node */
1874BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001875BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001876
1877static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001878{
Chris Mason5f39d392007-10-15 16:14:19 -04001879 unsigned long ptr;
1880 ptr = offsetof(struct btrfs_node, ptrs) +
1881 sizeof(struct btrfs_key_ptr) * nr;
1882 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001883}
1884
Chris Mason5f39d392007-10-15 16:14:19 -04001885static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1886 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04001887{
Chris Mason5f39d392007-10-15 16:14:19 -04001888 unsigned long ptr;
1889 ptr = offsetof(struct btrfs_node, ptrs) +
1890 sizeof(struct btrfs_key_ptr) * nr;
1891 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04001892}
1893
Chris Mason74493f72007-12-11 09:25:06 -05001894static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1895{
1896 unsigned long ptr;
1897 ptr = offsetof(struct btrfs_node, ptrs) +
1898 sizeof(struct btrfs_key_ptr) * nr;
1899 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1900}
1901
1902static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1903 int nr, u64 val)
1904{
1905 unsigned long ptr;
1906 ptr = offsetof(struct btrfs_node, ptrs) +
1907 sizeof(struct btrfs_key_ptr) * nr;
1908 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1909}
1910
Chris Mason810191f2007-10-15 16:18:55 -04001911static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04001912{
Chris Mason5f39d392007-10-15 16:14:19 -04001913 return offsetof(struct btrfs_node, ptrs) +
1914 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04001915}
1916
Chris Masone644d022007-11-06 15:09:29 -05001917void btrfs_node_key(struct extent_buffer *eb,
1918 struct btrfs_disk_key *disk_key, int nr);
1919
Chris Mason5f39d392007-10-15 16:14:19 -04001920static inline void btrfs_set_node_key(struct extent_buffer *eb,
1921 struct btrfs_disk_key *disk_key, int nr)
1922{
1923 unsigned long ptr;
1924 ptr = btrfs_node_key_ptr_offset(nr);
1925 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1926 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001927}
1928
Chris Mason5f39d392007-10-15 16:14:19 -04001929/* struct btrfs_item */
1930BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1931BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1932
1933static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001934{
Chris Mason5f39d392007-10-15 16:14:19 -04001935 return offsetof(struct btrfs_leaf, items) +
1936 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001937}
1938
Chris Mason5f39d392007-10-15 16:14:19 -04001939static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1940 int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001941{
Chris Mason5f39d392007-10-15 16:14:19 -04001942 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001943}
1944
Chris Mason5f39d392007-10-15 16:14:19 -04001945static inline u32 btrfs_item_end(struct extent_buffer *eb,
1946 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001947{
Chris Mason5f39d392007-10-15 16:14:19 -04001948 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04001949}
1950
Chris Mason5f39d392007-10-15 16:14:19 -04001951static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001952{
Chris Mason5f39d392007-10-15 16:14:19 -04001953 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001954}
1955
Chris Mason5f39d392007-10-15 16:14:19 -04001956static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001957{
Chris Mason5f39d392007-10-15 16:14:19 -04001958 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001959}
1960
Chris Mason5f39d392007-10-15 16:14:19 -04001961static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001962{
Chris Mason5f39d392007-10-15 16:14:19 -04001963 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001964}
1965
Chris Mason5f39d392007-10-15 16:14:19 -04001966static inline void btrfs_item_key(struct extent_buffer *eb,
1967 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001968{
Chris Mason5f39d392007-10-15 16:14:19 -04001969 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1970 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001971}
1972
Chris Mason5f39d392007-10-15 16:14:19 -04001973static inline void btrfs_set_item_key(struct extent_buffer *eb,
1974 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001975{
Chris Mason5f39d392007-10-15 16:14:19 -04001976 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1977 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001978}
1979
Chris Masone02119d2008-09-05 16:13:11 -04001980BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1981
Chris Mason0660b5a2008-11-17 20:37:39 -05001982/*
1983 * struct btrfs_root_ref
1984 */
1985BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1986BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1987BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1988
Chris Mason5f39d392007-10-15 16:14:19 -04001989/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05001990BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04001991BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1992BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04001993BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001994
1995static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1996 struct btrfs_dir_item *item,
1997 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001998{
Chris Mason5f39d392007-10-15 16:14:19 -04001999 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002000}
2001
Chris Mason5f39d392007-10-15 16:14:19 -04002002static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2003 struct btrfs_dir_item *item,
2004 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04002005{
Chris Mason5f39d392007-10-15 16:14:19 -04002006 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04002007}
2008
Josef Bacik0af3d002010-06-21 14:48:16 -04002009BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2010 num_entries, 64);
2011BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2012 num_bitmaps, 64);
2013BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2014 generation, 64);
2015
2016static inline void btrfs_free_space_key(struct extent_buffer *eb,
2017 struct btrfs_free_space_header *h,
2018 struct btrfs_disk_key *key)
2019{
2020 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2021}
2022
2023static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2024 struct btrfs_free_space_header *h,
2025 struct btrfs_disk_key *key)
2026{
2027 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2028}
2029
Chris Mason5f39d392007-10-15 16:14:19 -04002030/* struct btrfs_disk_key */
2031BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2032 objectid, 64);
2033BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2034BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04002035
Chris Masone2fa7222007-03-12 16:22:34 -04002036static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2037 struct btrfs_disk_key *disk)
2038{
2039 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002040 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002041 cpu->objectid = le64_to_cpu(disk->objectid);
2042}
2043
2044static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2045 struct btrfs_key *cpu)
2046{
2047 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04002048 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002049 disk->objectid = cpu_to_le64(cpu->objectid);
2050}
2051
Chris Mason5f39d392007-10-15 16:14:19 -04002052static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2053 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002054{
Chris Mason5f39d392007-10-15 16:14:19 -04002055 struct btrfs_disk_key disk_key;
2056 btrfs_node_key(eb, &disk_key, nr);
2057 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002058}
2059
Chris Mason5f39d392007-10-15 16:14:19 -04002060static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2061 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04002062{
Chris Mason5f39d392007-10-15 16:14:19 -04002063 struct btrfs_disk_key disk_key;
2064 btrfs_item_key(eb, &disk_key, nr);
2065 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002066}
2067
Chris Mason5f39d392007-10-15 16:14:19 -04002068static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2069 struct btrfs_dir_item *item,
2070 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002071{
Chris Mason5f39d392007-10-15 16:14:19 -04002072 struct btrfs_disk_key disk_key;
2073 btrfs_dir_item_key(eb, item, &disk_key);
2074 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04002075}
2076
Chris Mason5f39d392007-10-15 16:14:19 -04002077
2078static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04002079{
Chris Mason5f39d392007-10-15 16:14:19 -04002080 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04002081}
2082
Chris Mason5f39d392007-10-15 16:14:19 -04002083static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04002084{
Chris Mason5f39d392007-10-15 16:14:19 -04002085 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04002086}
2087
Chris Mason5f39d392007-10-15 16:14:19 -04002088/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04002089BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002090BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2091 generation, 64);
2092BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2093BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04002094BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002095BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2096
Chris Mason63b10fc2008-04-01 11:21:32 -04002097static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2098{
2099 return (btrfs_header_flags(eb) & flag) == flag;
2100}
2101
2102static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2103{
2104 u64 flags = btrfs_header_flags(eb);
2105 btrfs_set_header_flags(eb, flags | flag);
2106 return (flags & flag) == flag;
2107}
2108
2109static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2110{
2111 u64 flags = btrfs_header_flags(eb);
2112 btrfs_set_header_flags(eb, flags & ~flag);
2113 return (flags & flag) == flag;
2114}
2115
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002116static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2117{
2118 u64 flags = btrfs_header_flags(eb);
2119 return flags >> BTRFS_BACKREF_REV_SHIFT;
2120}
2121
2122static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2123 int rev)
2124{
2125 u64 flags = btrfs_header_flags(eb);
2126 flags &= ~BTRFS_BACKREF_REV_MASK;
2127 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2128 btrfs_set_header_flags(eb, flags);
2129}
2130
Chris Mason5f39d392007-10-15 16:14:19 -04002131static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
Chris Masone2fa7222007-03-12 16:22:34 -04002132{
Chris Mason5f39d392007-10-15 16:14:19 -04002133 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2134 return (u8 *)ptr;
Chris Masone2fa7222007-03-12 16:22:34 -04002135}
2136
Chris Masone17cade2008-04-15 15:41:47 -04002137static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2138{
2139 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2140 return (u8 *)ptr;
2141}
2142
Chris Mason5f39d392007-10-15 16:14:19 -04002143static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04002144{
Chris Masond3977122009-01-05 21:25:51 -05002145 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04002146}
2147
Chris Mason5f39d392007-10-15 16:14:19 -04002148/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04002149BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2150 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002151BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04002152BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2153BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002154
Yan Zheng84234f32008-10-29 14:49:05 -04002155BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2156 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002157BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2158BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04002159BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2160BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002161BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04002162BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2163BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04002164BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2165 last_snapshot, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002166
Li Zefanb83cc962010-12-20 16:04:08 +08002167static inline bool btrfs_root_readonly(struct btrfs_root *root)
2168{
Al Viro6ed3cf22012-04-13 11:49:04 -04002169 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
Li Zefanb83cc962010-12-20 16:04:08 +08002170}
2171
Chris Masonaf31f5e2011-11-03 15:17:42 -04002172/* struct btrfs_root_backup */
2173BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2174 tree_root, 64);
2175BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2176 tree_root_gen, 64);
2177BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2178 tree_root_level, 8);
2179
2180BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2181 chunk_root, 64);
2182BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2183 chunk_root_gen, 64);
2184BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2185 chunk_root_level, 8);
2186
2187BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2188 extent_root, 64);
2189BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2190 extent_root_gen, 64);
2191BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2192 extent_root_level, 8);
2193
2194BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2195 fs_root, 64);
2196BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2197 fs_root_gen, 64);
2198BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2199 fs_root_level, 8);
2200
2201BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2202 dev_root, 64);
2203BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2204 dev_root_gen, 64);
2205BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2206 dev_root_level, 8);
2207
2208BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2209 csum_root, 64);
2210BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2211 csum_root_gen, 64);
2212BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2213 csum_root_level, 8);
2214BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2215 total_bytes, 64);
2216BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2217 bytes_used, 64);
2218BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2219 num_devices, 64);
2220
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002221/* struct btrfs_balance_item */
2222BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002223
Ilya Dryomov0940ebf2012-01-16 22:04:48 +02002224static inline void btrfs_balance_data(struct extent_buffer *eb,
2225 struct btrfs_balance_item *bi,
2226 struct btrfs_disk_balance_args *ba)
2227{
2228 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2229}
2230
2231static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2232 struct btrfs_balance_item *bi,
2233 struct btrfs_disk_balance_args *ba)
2234{
2235 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2236}
2237
2238static inline void btrfs_balance_meta(struct extent_buffer *eb,
2239 struct btrfs_balance_item *bi,
2240 struct btrfs_disk_balance_args *ba)
2241{
2242 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2243}
2244
2245static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2246 struct btrfs_balance_item *bi,
2247 struct btrfs_disk_balance_args *ba)
2248{
2249 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2250}
2251
2252static inline void btrfs_balance_sys(struct extent_buffer *eb,
2253 struct btrfs_balance_item *bi,
2254 struct btrfs_disk_balance_args *ba)
2255{
2256 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2257}
2258
2259static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2260 struct btrfs_balance_item *bi,
2261 struct btrfs_disk_balance_args *ba)
2262{
2263 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2264}
2265
2266static inline void
2267btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2268 struct btrfs_disk_balance_args *disk)
2269{
2270 memset(cpu, 0, sizeof(*cpu));
2271
2272 cpu->profiles = le64_to_cpu(disk->profiles);
2273 cpu->usage = le64_to_cpu(disk->usage);
2274 cpu->devid = le64_to_cpu(disk->devid);
2275 cpu->pstart = le64_to_cpu(disk->pstart);
2276 cpu->pend = le64_to_cpu(disk->pend);
2277 cpu->vstart = le64_to_cpu(disk->vstart);
2278 cpu->vend = le64_to_cpu(disk->vend);
2279 cpu->target = le64_to_cpu(disk->target);
2280 cpu->flags = le64_to_cpu(disk->flags);
2281}
2282
2283static inline void
2284btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2285 struct btrfs_balance_args *cpu)
2286{
2287 memset(disk, 0, sizeof(*disk));
2288
2289 disk->profiles = cpu_to_le64(cpu->profiles);
2290 disk->usage = cpu_to_le64(cpu->usage);
2291 disk->devid = cpu_to_le64(cpu->devid);
2292 disk->pstart = cpu_to_le64(cpu->pstart);
2293 disk->pend = cpu_to_le64(cpu->pend);
2294 disk->vstart = cpu_to_le64(cpu->vstart);
2295 disk->vend = cpu_to_le64(cpu->vend);
2296 disk->target = cpu_to_le64(cpu->target);
2297 disk->flags = cpu_to_le64(cpu->flags);
2298}
2299
2300/* struct btrfs_super_block */
Chris Masondb945352007-10-15 16:15:53 -04002301BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04002302BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002303BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2304 generation, 64);
2305BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04002306BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2307 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04002308BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2309 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002310BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2311 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04002312BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2313 chunk_root, 64);
2314BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04002315 chunk_root_level, 8);
2316BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2317 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05002318BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2319 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04002320BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2321 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04002322BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2323 total_bytes, 64);
2324BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2325 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002326BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2327 sectorsize, 32);
2328BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2329 nodesize, 32);
2330BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2331 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05002332BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2333 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04002334BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2335 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04002336BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2337 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002338BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2339 compat_flags, 64);
2340BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
Josef Bacik12534832009-12-17 21:32:27 +00002341 compat_ro_flags, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05002342BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2343 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002344BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2345 csum_type, 16);
Josef Bacik0af3d002010-06-21 14:48:16 -04002346BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2347 cache_generation, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05002348
2349static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2350{
2351 int t = btrfs_super_csum_type(s);
2352 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2353 return btrfs_csum_sizes[t];
2354}
Chris Mason5f39d392007-10-15 16:14:19 -04002355
2356static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04002357{
Chris Mason5f39d392007-10-15 16:14:19 -04002358 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04002359}
2360
Chris Mason5f39d392007-10-15 16:14:19 -04002361/* struct btrfs_file_extent_item */
2362BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04002363
Chris Masond3977122009-01-05 21:25:51 -05002364static inline unsigned long
2365btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454d2007-04-19 13:37:44 -04002366{
Chris Mason5f39d392007-10-15 16:14:19 -04002367 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04002368 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04002369 return offset;
Chris Mason236454d2007-04-19 13:37:44 -04002370}
2371
2372static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2373{
Chris Masondb945352007-10-15 16:15:53 -04002374 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454d2007-04-19 13:37:44 -04002375}
2376
Chris Masondb945352007-10-15 16:15:53 -04002377BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2378 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002379BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2380 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04002381BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2382 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04002383BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2384 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04002385BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2386 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04002387BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2388 ram_bytes, 64);
2389BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2390 compression, 8);
2391BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2392 encryption, 8);
2393BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2394 other_encoding, 16);
2395
2396/* this returns the number of file bytes represented by the inline item.
2397 * If an item is compressed, this is the uncompressed size
2398 */
2399static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2400 struct btrfs_file_extent_item *e)
2401{
2402 return btrfs_file_extent_ram_bytes(eb, e);
2403}
2404
2405/*
2406 * this returns the number of bytes used by the item on disk, minus the
2407 * size of any extent headers. If a file is compressed on disk, this is
2408 * the compressed size
2409 */
2410static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2411 struct btrfs_item *e)
2412{
2413 unsigned long offset;
2414 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2415 return btrfs_item_size(eb, e) - offset;
2416}
Chris Mason9f5fae22007-03-20 14:38:32 -04002417
Al Viro815745c2011-11-17 15:40:49 -05002418static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
Chris Masone20d96d2007-03-22 12:13:20 -04002419{
2420 return sb->s_fs_info;
2421}
2422
Chris Masond3977122009-01-05 21:25:51 -05002423static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2424{
Chris Masondb945352007-10-15 16:15:53 -04002425 if (level == 0)
2426 return root->leafsize;
2427 return root->nodesize;
2428}
2429
Chris Mason4beb1b82007-03-14 10:31:29 -04002430/* helper function to cast into the data area of the leaf. */
2431#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04002432 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04002433 btrfs_item_offset_nr(leaf, slot)))
2434
2435#define btrfs_item_ptr_offset(leaf, slot) \
2436 ((unsigned long)(btrfs_leaf_data(leaf) + \
2437 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04002438
Chris Mason2b1f55b2008-09-24 11:48:04 -04002439static inline struct dentry *fdentry(struct file *file)
2440{
Chris Mason6da6aba2007-12-18 16:15:09 -05002441 return file->f_path.dentry;
Chris Mason6da6aba2007-12-18 16:15:09 -05002442}
2443
Josef Bacik67377732010-09-16 16:19:09 -04002444static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2445{
2446 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2447 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2448}
2449
Josef Bacik3b16a4e2011-09-21 15:05:58 -04002450static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2451{
2452 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2453}
2454
Chris Masonb18c6682007-04-17 13:26:50 -04002455/* extent-tree.c */
Miao Xie16cdcec2011-04-22 18:12:22 +08002456static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
Josef Bacik9e0baf62011-07-15 15:16:44 +00002457 unsigned num_items)
Miao Xie16cdcec2011-04-22 18:12:22 +08002458{
2459 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2460 3 * num_items;
2461}
2462
Josef Bacik07127182011-08-19 10:29:59 -04002463/*
2464 * Doing a truncate won't result in new nodes or leaves, just what we need for
2465 * COW.
2466 */
2467static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2468 unsigned num_items)
2469{
2470 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2471 num_items;
2472}
2473
Chris Masonfa9c0d72009-04-03 09:47:43 -04002474void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04002475int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04002477int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002478int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2479 struct btrfs_root *root, u64 bytenr,
2480 u64 num_bytes, u64 *refs, u64 *flags);
Yan Zheng11833d62009-09-11 16:11:19 -04002481int btrfs_pin_extent(struct btrfs_root *root,
2482 u64 bytenr, u64 num, int reserved);
Chris Masone688b722011-10-31 20:52:39 -04002483int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2484 struct btrfs_root *root,
2485 u64 bytenr, u64 num_bytes);
Yan Zheng80ff3852008-10-30 14:20:02 -04002486int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002487 struct btrfs_root *root,
2488 u64 objectid, u64 offset, u64 bytenr);
Chris Masond3977122009-01-05 21:25:51 -05002489struct btrfs_block_group_cache *btrfs_lookup_block_group(
2490 struct btrfs_fs_info *info,
2491 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002492void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002493u64 btrfs_find_block_group(struct btrfs_root *root,
2494 u64 search_start, u64 search_hint, int owner);
Chris Mason5f39d392007-10-15 16:14:19 -04002495struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002496 struct btrfs_root *root, u32 blocksize,
2497 u64 parent, u64 root_objectid,
2498 struct btrfs_disk_key *key, int level,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002499 u64 hint, u64 empty_size, int for_cow);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002500void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2501 struct btrfs_root *root,
2502 struct extent_buffer *buf,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002503 u64 parent, int last_ref, int for_cow);
Chris Mason65b51a02008-08-01 15:11:20 -04002504struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2505 struct btrfs_root *root,
Chris Mason4008c042009-02-12 14:09:45 -05002506 u64 bytenr, u32 blocksize,
2507 int level);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002508int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2509 struct btrfs_root *root,
2510 u64 root_objectid, u64 owner,
2511 u64 offset, struct btrfs_key *ins);
2512int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2513 struct btrfs_root *root,
2514 u64 root_objectid, u64 owner, u64 offset,
2515 struct btrfs_key *ins);
Chris Masone6dcd2d2008-07-17 12:53:50 -04002516int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2517 struct btrfs_root *root,
2518 u64 num_bytes, u64 min_alloc_size,
2519 u64 empty_size, u64 hint_byte,
Josef Bacik81c9ad22012-01-18 10:56:06 -05002520 struct btrfs_key *ins, u64 data);
Chris Masone089f052007-03-16 16:20:31 -04002521int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002522 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002523int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002524 struct extent_buffer *buf, int full_backref, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002525int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root,
2527 u64 bytenr, u64 num_bytes, u64 flags,
2528 int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002529int btrfs_free_extent(struct btrfs_trans_handle *trans,
2530 struct btrfs_root *root,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002531 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2532 u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002533
Chris Mason65b51a02008-08-01 15:11:20 -04002534int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Chris Masone688b722011-10-31 20:52:39 -04002535int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2536 u64 start, u64 len);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002537void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2538 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04002539int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04002540 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04002541int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04002542 struct btrfs_root *root,
2543 u64 bytenr, u64 num_bytes, u64 parent,
Arne Jansen66d7e7f2011-09-12 15:26:38 +02002544 u64 root_objectid, u64 owner, u64 offset, int for_cow);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002545
Chris Mason9078a3e2007-04-26 16:46:15 -04002546int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002548int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002549int btrfs_free_block_groups(struct btrfs_fs_info *info);
2550int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04002551int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002552int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2553 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04002554 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04002555 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04002556int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root, u64 group_start);
Yan Zheng2b820322008-11-17 21:11:30 -05002558u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
Miao Xie6d07bce2011-01-05 10:07:31 +00002559u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
Josef Bacik6a632092009-02-20 11:00:09 -05002560void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
Chris Mason4184ea72009-03-10 12:39:20 -04002561void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002562int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2563void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002564void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002566int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2567 struct inode *inode);
2568void btrfs_orphan_release_metadata(struct inode *inode);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002569int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2570 struct btrfs_pending_snapshot *pending);
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -04002571int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2572void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2573int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2574void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002575void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2576struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2577void btrfs_free_block_rsv(struct btrfs_root *root,
2578 struct btrfs_block_rsv *rsv);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04002579int btrfs_block_rsv_add(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002580 struct btrfs_block_rsv *block_rsv,
Josef Bacik8bb8ab22010-10-15 16:52:49 -04002581 u64 num_bytes);
Josef Bacikc06a0e12011-11-04 19:56:02 -04002582int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2583 struct btrfs_block_rsv *block_rsv,
2584 u64 num_bytes);
Josef Bacik4a92b1b2011-08-30 12:34:28 -04002585int btrfs_block_rsv_check(struct btrfs_root *root,
Josef Bacik36ba0222011-10-18 12:15:48 -04002586 struct btrfs_block_rsv *block_rsv, int min_factor);
2587int btrfs_block_rsv_refill(struct btrfs_root *root,
Yan, Zhengf0486c62010-05-16 10:46:25 -04002588 struct btrfs_block_rsv *block_rsv,
Josef Bacik36ba0222011-10-18 12:15:48 -04002589 u64 min_reserved);
Miao Xieaa38a712011-11-18 17:43:00 +08002590int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2591 struct btrfs_block_rsv *block_rsv,
2592 u64 min_reserved);
Yan, Zhengf0486c62010-05-16 10:46:25 -04002593int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2594 struct btrfs_block_rsv *dst_rsv,
2595 u64 num_bytes);
2596void btrfs_block_rsv_release(struct btrfs_root *root,
2597 struct btrfs_block_rsv *block_rsv,
2598 u64 num_bytes);
2599int btrfs_set_block_group_ro(struct btrfs_root *root,
2600 struct btrfs_block_group_cache *cache);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002601void btrfs_set_block_group_rw(struct btrfs_root *root,
2602 struct btrfs_block_group_cache *cache);
Josef Bacik0af3d002010-06-21 14:48:16 -04002603void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
Miao Xie6d07bce2011-01-05 10:07:31 +00002604u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
liuboacce9522011-01-06 19:30:25 +08002605int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2606 u64 start, u64 end);
2607int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
Li Dongyang5378e602011-03-24 10:24:27 +00002608 u64 num_bytes, u64 *actual_bytes);
Chris Masonc87f08c2011-02-16 13:57:04 -05002609int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2610 struct btrfs_root *root, u64 type);
Li Dongyangf7039b12011-03-24 10:24:28 +00002611int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
liuboacce9522011-01-06 19:30:25 +08002612
liuboc59021f2011-03-07 02:13:14 +00002613int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
Chris Masondee26a92007-03-26 16:00:06 -04002614/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002615int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2616 int level, int *slot);
2617int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002618int btrfs_previous_item(struct btrfs_root *root,
2619 struct btrfs_path *path, u64 min_objectid,
2620 int type);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002621void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2622 struct btrfs_root *root, struct btrfs_path *path,
2623 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002624struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2625struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002626int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002627 struct btrfs_key *key, int lowest_level,
2628 int cache_only, u64 min_trans);
2629int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Chris Masone02119d2008-09-05 16:13:11 -04002630 struct btrfs_key *max_key,
Chris Mason3f157a22008-06-25 16:01:31 -04002631 struct btrfs_path *path, int cache_only,
2632 u64 min_trans);
Chris Mason5f39d392007-10-15 16:14:19 -04002633int btrfs_cow_block(struct btrfs_trans_handle *trans,
2634 struct btrfs_root *root, struct extent_buffer *buf,
2635 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002636 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002637int btrfs_copy_root(struct btrfs_trans_handle *trans,
2638 struct btrfs_root *root,
2639 struct extent_buffer *buf,
2640 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002641int btrfs_block_can_be_shared(struct btrfs_root *root,
2642 struct extent_buffer *buf);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002643void btrfs_extend_item(struct btrfs_trans_handle *trans,
2644 struct btrfs_root *root, struct btrfs_path *path,
2645 u32 data_size);
2646void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2647 struct btrfs_root *root,
2648 struct btrfs_path *path,
2649 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002650int btrfs_split_item(struct btrfs_trans_handle *trans,
2651 struct btrfs_root *root,
2652 struct btrfs_path *path,
2653 struct btrfs_key *new_key,
2654 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002655int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2656 struct btrfs_root *root,
2657 struct btrfs_path *path,
2658 struct btrfs_key *new_key);
Chris Masone089f052007-03-16 16:20:31 -04002659int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2660 *root, struct btrfs_key *key, struct btrfs_path *p, int
2661 ins_len, int cow);
Chris Mason6702ed42007-08-07 16:15:09 -04002662int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002663 struct btrfs_root *root, struct extent_buffer *parent,
Chris Masona6b6e752007-10-15 16:22:39 -04002664 int start_slot, int cache_only, u64 *last_ret,
2665 struct btrfs_key *progress);
David Sterbab3b4aa72011-04-21 01:20:15 +02002666void btrfs_release_path(struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04002667struct btrfs_path *btrfs_alloc_path(void);
2668void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002669void btrfs_set_path_blocking(struct btrfs_path *p);
Miao Xie16cdcec2011-04-22 18:12:22 +08002670void btrfs_clear_path_blocking(struct btrfs_path *p,
Chris Masonbd681512011-07-16 15:23:14 -04002671 struct extent_buffer *held, int held_rw);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002672void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2673
Chris Mason85e21ba2008-01-29 15:11:36 -05002674int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2675 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05002676static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2677 struct btrfs_root *root,
2678 struct btrfs_path *path)
2679{
2680 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2681}
2682
Jeff Mahoney143bede2012-03-01 14:56:26 +01002683void setup_items_for_insert(struct btrfs_trans_handle *trans,
2684 struct btrfs_root *root, struct btrfs_path *path,
2685 struct btrfs_key *cpu_key, u32 *data_size,
2686 u32 total_data, u32 total_size, int nr);
Chris Masone089f052007-03-16 16:20:31 -04002687int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2688 *root, struct btrfs_key *key, void *data, u32 data_size);
Chris Mason9c583092008-01-29 15:15:18 -05002689int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2690 struct btrfs_root *root,
2691 struct btrfs_path *path,
2692 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2693
2694static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2695 struct btrfs_root *root,
2696 struct btrfs_path *path,
2697 struct btrfs_key *key,
2698 u32 data_size)
2699{
2700 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2701}
2702
Chris Mason234b63a2007-03-13 10:46:10 -04002703int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Jan Schmidtc7d22a32011-11-22 15:14:33 +01002704static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2705{
2706 ++p->slots[0];
2707 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2708 return btrfs_next_leaf(root, p);
2709 return 0;
2710}
Chris Mason7bb86312007-12-11 09:25:06 -05002711int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason5f39d392007-10-15 16:14:19 -04002712int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Jeff Mahoney2c536792011-10-03 23:22:41 -04002713int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2714 struct btrfs_block_rsv *block_rsv,
2715 int update_ref, int for_reloc);
Yan Zhengf82d02d2008-10-29 14:49:05 -04002716int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root,
2718 struct extent_buffer *node,
2719 struct extent_buffer *parent);
David Sterba7841cb22011-05-31 18:07:27 +02002720static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2721{
2722 /*
2723 * Get synced with close_ctree()
2724 */
2725 smp_mb();
2726 return fs_info->closing;
2727}
David Sterba6c417612011-04-13 15:41:04 +02002728static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2729{
Ilya Dryomov837d5b62012-01-16 22:04:49 +02002730 kfree(fs_info->balance_ctl);
David Sterba6c417612011-04-13 15:41:04 +02002731 kfree(fs_info->delayed_root);
2732 kfree(fs_info->extent_root);
2733 kfree(fs_info->tree_root);
2734 kfree(fs_info->chunk_root);
2735 kfree(fs_info->dev_root);
2736 kfree(fs_info->csum_root);
2737 kfree(fs_info->super_copy);
2738 kfree(fs_info->super_for_commit);
2739 kfree(fs_info);
2740}
David Sterba7841cb22011-05-31 18:07:27 +02002741
Chris Masondee26a92007-03-26 16:00:06 -04002742/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05002743int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002744 struct btrfs_path *path,
2745 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05002746int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002748 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2749 const char *name, int name_len);
2750int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *tree_root,
2752 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05002753 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04002754int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2755 struct btrfs_key *key);
2756int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2757 *root, struct btrfs_key *key, struct btrfs_root_item
2758 *item);
Jeff Mahoneyb45a9d82011-10-03 23:22:44 -04002759int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2760 struct btrfs_root *root,
2761 struct btrfs_key *key,
2762 struct btrfs_root_item *item);
Chris Masone089f052007-03-16 16:20:31 -04002763int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2764 btrfs_root_item *item, struct btrfs_key *key);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002765int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
Yan, Zheng76dda932009-09-21 16:00:26 -04002766int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Mark Fashehbf5f32e2011-07-14 21:23:06 +00002767void btrfs_set_root_node(struct btrfs_root_item *item,
2768 struct extent_buffer *node);
Li Zefan08fe4db2011-03-28 02:01:25 +00002769void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2770
Chris Masondee26a92007-03-26 16:00:06 -04002771/* dir-item.c */
Chris Masond3977122009-01-05 21:25:51 -05002772int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2773 struct btrfs_root *root, const char *name,
Miao Xie16cdcec2011-04-22 18:12:22 +08002774 int name_len, struct inode *dir,
Josef Bacikaec74772008-07-24 12:12:38 -04002775 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04002776struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2777 struct btrfs_root *root,
2778 struct btrfs_path *path, u64 dir,
2779 const char *name, int name_len,
2780 int mod);
2781struct btrfs_dir_item *
2782btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2783 struct btrfs_root *root,
2784 struct btrfs_path *path, u64 dir,
2785 u64 objectid, const char *name, int name_len,
2786 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002787struct btrfs_dir_item *
2788btrfs_search_dir_index_item(struct btrfs_root *root,
2789 struct btrfs_path *path, u64 dirid,
2790 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002791struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2792 struct btrfs_path *path,
Chris Mason7f5c1512007-03-23 15:56:19 -04002793 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002794int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2795 struct btrfs_root *root,
2796 struct btrfs_path *path,
2797 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05002798int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002799 struct btrfs_root *root,
2800 struct btrfs_path *path, u64 objectid,
2801 const char *name, u16 name_len,
2802 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05002803struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2804 struct btrfs_root *root,
2805 struct btrfs_path *path, u64 dir,
2806 const char *name, u16 name_len,
2807 int mod);
Josef Bacik22a94d42011-03-16 16:47:17 -04002808int verify_dir_item(struct btrfs_root *root,
2809 struct extent_buffer *leaf,
2810 struct btrfs_dir_item *dir_item);
Josef Bacik7b128762008-07-24 12:17:14 -04002811
2812/* orphan.c */
2813int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2814 struct btrfs_root *root, u64 offset);
2815int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2816 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002817int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04002818
Chris Masondee26a92007-03-26 16:00:06 -04002819/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05002820int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2821 struct btrfs_root *root,
2822 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002823 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05002824int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *root,
2826 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002827 u64 inode_objectid, u64 ref_objectid, u64 *index);
Yan, Zhenga22285a2010-05-16 10:48:46 -04002828struct btrfs_inode_ref *
2829btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2830 struct btrfs_root *root,
2831 struct btrfs_path *path,
2832 const char *name, int name_len,
2833 u64 inode_objectid, u64 ref_objectid, int mod);
Chris Mason5f39d392007-10-15 16:14:19 -04002834int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2835 struct btrfs_root *root,
2836 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04002837int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04002838 *root, struct btrfs_path *path,
2839 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04002840
2841/* file-item.c */
Chris Mason459931e2008-12-10 09:10:46 -05002842int btrfs_del_csums(struct btrfs_trans_handle *trans,
2843 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04002844int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002845 struct bio *bio, u32 *dst);
Josef Bacik4b46fce2010-05-23 11:00:55 -04002846int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2847 struct bio *bio, u64 logical_offset, u32 *dst);
Chris Masonb18c6682007-04-17 13:26:50 -04002848int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04002849 struct btrfs_root *root,
2850 u64 objectid, u64 pos,
2851 u64 disk_offset, u64 disk_num_bytes,
2852 u64 num_bytes, u64 offset, u64 ram_bytes,
2853 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04002854int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2855 struct btrfs_root *root,
2856 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04002857 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05002858int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05002859 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04002860 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04002861int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002862 struct bio *bio, u64 file_start, int contig);
Chris Masonb18c6682007-04-17 13:26:50 -04002863struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2864 struct btrfs_root *root,
2865 struct btrfs_path *path,
Chris Masond20f7042008-12-08 16:58:54 -05002866 u64 bytenr, int cow);
Chris Mason1de037a2007-05-29 15:17:08 -04002867int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2868 struct btrfs_root *root, struct btrfs_path *path,
2869 u64 isize);
Arne Jansena2de7332011-03-08 14:14:00 +01002870int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2871 struct list_head *list, int search_commit);
Chris Mason39279cc2007-06-12 06:35:45 -04002872/* inode.c */
Josef Bacikb2675152011-07-18 13:21:36 -04002873struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2874 size_t pg_offset, u64 start, u64 len,
2875 int create);
Chris Mason4881ee52008-07-24 09:51:08 -04002876
2877/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04002878#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04002879#define ClearPageChecked ClearPageFsMisc
2880#define SetPageChecked SetPageFsMisc
2881#define PageChecked PageFsMisc
2882#endif
2883
Li Zefanb6973aa2011-07-20 03:46:35 +00002884/* This forces readahead on a given range of bytes in an inode */
2885static inline void btrfs_force_ra(struct address_space *mapping,
2886 struct file_ra_state *ra, struct file *file,
2887 pgoff_t offset, unsigned long req_size)
2888{
2889 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2890}
2891
Chris Mason3de45862008-11-17 21:02:50 -05002892struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2893int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04002894int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2895 struct btrfs_root *root,
2896 struct inode *dir, struct inode *inode,
2897 const char *name, int name_len);
2898int btrfs_add_link(struct btrfs_trans_handle *trans,
2899 struct inode *parent_inode, struct inode *inode,
2900 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002901int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2902 struct btrfs_root *root,
2903 struct inode *dir, u64 objectid,
2904 const char *name, int name_len);
Chris Masone02119d2008-09-05 16:13:11 -04002905int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2906 struct btrfs_root *root,
2907 struct inode *inode, u64 new_size,
2908 u32 min_type);
2909
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002910int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Josef Bacik2ac55d42010-02-03 19:33:23 +00002911int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2912 struct extent_state **cached_state);
Chris Masonf4219502008-07-22 11:18:09 -04002913int btrfs_writepages(struct address_space *mapping,
2914 struct writeback_control *wbc);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002915int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Josef Bacikd82a6f12011-05-11 15:26:06 -04002916 struct btrfs_root *new_root, u64 new_dirid);
Chris Mason239b14b2008-03-24 15:02:07 -04002917int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -04002918 size_t size, struct bio *bio, unsigned long bio_flags);
Chris Mason239b14b2008-03-24 15:02:07 -04002919
Nick Pigginc2ec1752009-03-31 15:23:21 -07002920int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04002921int btrfs_readpage(struct file *file, struct page *page);
Al Virobd555972010-06-07 11:35:40 -04002922void btrfs_evict_inode(struct inode *inode);
Christoph Hellwiga9185b42010-03-05 09:21:37 +01002923int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
Josef Bacik22c44fe2011-11-30 10:45:38 -05002924int btrfs_dirty_inode(struct inode *inode);
2925int btrfs_update_time(struct file *file);
Chris Mason39279cc2007-06-12 06:35:45 -04002926struct inode *btrfs_alloc_inode(struct super_block *sb);
2927void btrfs_destroy_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -04002928int btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04002929int btrfs_init_cachep(void);
2930void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04002931long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05302932struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Josef Bacik73f73412009-12-04 17:38:27 +00002933 struct btrfs_root *root, int *was_new);
Chris Masona52d9a82007-08-27 16:49:44 -04002934struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +02002935 size_t pg_offset, u64 start, u64 end,
Chris Masona52d9a82007-08-27 16:49:44 -04002936 int create);
2937int btrfs_update_inode(struct btrfs_trans_handle *trans,
2938 struct btrfs_root *root,
2939 struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002940int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2941int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
Josef Bacik66b4ffd2011-01-31 16:22:42 -05002942int btrfs_orphan_cleanup(struct btrfs_root *root);
Yan, Zhengd68fc572010-05-16 10:49:58 -04002943void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2944 struct btrfs_root *root);
Josef Bacika41ad392011-01-31 15:30:16 -05002945int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
Jeff Mahoney143bede2012-03-01 14:56:26 +01002946void btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002947void btrfs_add_delayed_iput(struct inode *inode);
2948void btrfs_run_delayed_iputs(struct btrfs_root *root);
Yan, Zhengefa56462010-05-16 10:49:59 -04002949int btrfs_prealloc_file_range(struct inode *inode, int mode,
2950 u64 start, u64 num_bytes, u64 min_size,
2951 loff_t actual_len, u64 *alloc_hint);
Josef Bacik0af3d002010-06-21 14:48:16 -04002952int btrfs_prealloc_file_range_trans(struct inode *inode,
2953 struct btrfs_trans_handle *trans, int mode,
2954 u64 start, u64 num_bytes, u64 min_size,
2955 loff_t actual_len, u64 *alloc_hint);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04002956extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002957
2958/* ioctl.c */
2959long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002960void btrfs_update_iflags(struct inode *inode);
2961void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Chris Mason4cb53002011-05-24 15:35:30 -04002962int btrfs_defrag_file(struct inode *inode, struct file *file,
2963 struct btrfs_ioctl_defrag_range_args *range,
2964 u64 newer_than, unsigned long max_pages);
Chris Mason39279cc2007-06-12 06:35:45 -04002965/* file.c */
Chris Mason4cb53002011-05-24 15:35:30 -04002966int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2967 struct inode *inode);
2968int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
Josef Bacik02c24a82011-07-16 20:44:56 -04002969int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002970int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2971 int skip_pinned);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07002972extern const struct file_operations btrfs_file_operations;
Yan, Zheng920bbbf2009-11-12 09:34:08 +00002973int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2974 u64 start, u64 end, u64 *hint_byte, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04002975int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04002976 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04002977int btrfs_release_file(struct inode *inode, struct file *file);
Josef Bacikbe1a12a2011-04-06 13:05:22 -04002978void btrfs_drop_pages(struct page **pages, size_t num_pages);
2979int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2980 struct page **pages, size_t num_pages,
2981 loff_t pos, size_t write_bytes,
2982 struct extent_state **cached);
Sage Weil6bf13c02008-06-10 10:07:39 -04002983
Chris Mason6702ed42007-08-07 16:15:09 -04002984/* tree-defrag.c */
2985int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2986 struct btrfs_root *root, int cache_only);
Josef Bacik58176a92007-08-29 15:47:34 -04002987
2988/* sysfs.c */
2989int btrfs_init_sysfs(void);
2990void btrfs_exit_sysfs(void);
Josef Bacik58176a92007-08-29 15:47:34 -04002991
Josef Bacik5103e942007-11-16 11:45:54 -05002992/* xattr.c */
2993ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04002994
Chris Masonedbd8d42007-12-21 16:27:24 -05002995/* super.c */
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04002996int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04002997int btrfs_sync_fs(struct super_block *sb, int wait);
Jeff Mahoney4da35112012-03-01 14:57:30 +01002998void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08002999void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
Jeff Mahoney4da35112012-03-01 14:57:30 +01003000 unsigned int line, int errno, const char *fmt, ...);
liuboacce9522011-01-06 19:30:25 +08003001
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003002void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3003 struct btrfs_root *root, const char *function,
3004 unsigned int line, int errno);
3005
3006#define btrfs_abort_transaction(trans, root, errno) \
3007do { \
3008 __btrfs_abort_transaction(trans, root, __func__, \
3009 __LINE__, errno); \
3010} while (0)
liuboacce9522011-01-06 19:30:25 +08003011
3012#define btrfs_std_error(fs_info, errno) \
3013do { \
3014 if ((errno)) \
Jeff Mahoney4da35112012-03-01 14:57:30 +01003015 __btrfs_std_error((fs_info), __func__, \
3016 __LINE__, (errno), NULL); \
3017} while (0)
3018
3019#define btrfs_error(fs_info, errno, fmt, args...) \
3020do { \
3021 __btrfs_std_error((fs_info), __func__, __LINE__, \
3022 (errno), fmt, ##args); \
liuboacce9522011-01-06 19:30:25 +08003023} while (0)
Josef Bacik33268ea2008-07-24 12:16:36 -04003024
Jeff Mahoney8c342932011-10-03 23:22:31 -04003025void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3026 unsigned int line, int errno, const char *fmt, ...);
3027
3028#define btrfs_panic(fs_info, errno, fmt, args...) \
3029do { \
3030 struct btrfs_fs_info *_i = (fs_info); \
3031 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3032 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
Chris Masoneb60cea2007-02-02 09:18:22 -05003033} while (0)
3034
3035/* acl.c */
3036#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +02003037struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
Chris Masoneb60cea2007-02-02 09:18:22 -05003038int btrfs_init_acl(struct btrfs_trans_handle *trans,
3039 struct inode *inode, struct inode *dir);
3040int btrfs_acl_chmod(struct inode *inode);
Li Zefan9b89d952011-07-14 03:17:39 +00003041#else
Linus Torvaldsed8f3732011-08-02 21:14:05 -10003042#define btrfs_get_acl NULL
Li Zefan9b89d952011-07-14 03:17:39 +00003043static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3044 struct inode *inode, struct inode *dir)
3045{
3046 return 0;
3047}
3048static inline int btrfs_acl_chmod(struct inode *inode)
3049{
3050 return 0;
3051}
3052#endif
Chris Masoneb60cea2007-02-02 09:18:22 -05003053
3054/* relocation.c */
3055int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3056int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root);
3058int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3059 struct btrfs_root *root);
3060int btrfs_recover_relocation(struct btrfs_root *root);
3061int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3062void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root, struct extent_buffer *buf,
3064 struct extent_buffer *cow);
3065void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3066 struct btrfs_pending_snapshot *pending,
3067 u64 *bytes_to_reserve);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003068int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
Chris Masoneb60cea2007-02-02 09:18:22 -05003069 struct btrfs_pending_snapshot *pending);
Arne Jansena2de7332011-03-08 14:14:00 +01003070
3071/* scrub.c */
3072int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
Arne Jansen86287642011-03-23 16:34:19 +01003073 struct btrfs_scrub_progress *progress, int readonly);
Jeff Mahoney143bede2012-03-01 14:56:26 +01003074void btrfs_scrub_pause(struct btrfs_root *root);
3075void btrfs_scrub_pause_super(struct btrfs_root *root);
3076void btrfs_scrub_continue(struct btrfs_root *root);
3077void btrfs_scrub_continue_super(struct btrfs_root *root);
Jeff Mahoney49b25e02012-03-01 17:24:58 +01003078int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
Arne Jansena2de7332011-03-08 14:14:00 +01003079int btrfs_scrub_cancel(struct btrfs_root *root);
3080int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3081int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3082int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3083 struct btrfs_scrub_progress *progress);
3084
Arne Jansen7414a032011-05-23 14:33:49 +02003085/* reada.c */
3086struct reada_control {
3087 struct btrfs_root *root; /* tree to prefetch */
3088 struct btrfs_key key_start;
3089 struct btrfs_key key_end; /* exclusive */
3090 atomic_t elems;
3091 struct kref refcnt;
3092 wait_queue_head_t wait;
3093};
3094struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3095 struct btrfs_key *start, struct btrfs_key *end);
3096int btrfs_reada_wait(void *handle);
3097void btrfs_reada_detach(void *handle);
3098int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3099 u64 start, int err);
3100
Chris Masoneb60cea2007-02-02 09:18:22 -05003101#endif