blob: 9f806dd04c2704899bf28e5324eebaa14a923e27 [file] [log] [blame]
Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
Chris Masoneb60cea2007-02-02 09:18:22 -050021
Chris Mason6da6aba2007-12-18 16:15:09 -050022#include <linux/version.h>
Chris Mason810191f2007-10-15 16:18:55 -040023#include <linux/mm.h>
24#include <linux/highmem.h>
Chris Masone20d96d2007-03-22 12:13:20 -040025#include <linux/fs.h>
Josef Bacik58176a92007-08-29 15:47:34 -040026#include <linux/completion.h>
Chris Mason04160082008-03-26 10:28:07 -040027#include <linux/backing-dev.h>
Chris Masone6dcd2d2008-07-17 12:53:50 -040028#include <linux/wait.h>
Chris Mason479965d2007-10-15 16:14:27 -040029#include <asm/kmap_types.h>
Chris Masond1310b22008-01-24 16:13:08 -050030#include "extent_io.h"
Chris Mason5f39d392007-10-15 16:14:19 -040031#include "extent_map.h"
Chris Mason8b712842008-06-11 16:50:36 -040032#include "async-thread.h"
Chris Masone20d96d2007-03-22 12:13:20 -040033
Chris Masone089f052007-03-16 16:20:31 -040034struct btrfs_trans_handle;
Chris Mason79154b12007-03-22 15:59:16 -040035struct btrfs_transaction;
Chris Mason35b7e472007-05-02 15:53:43 -040036extern struct kmem_cache *btrfs_trans_handle_cachep;
37extern struct kmem_cache *btrfs_transaction_cachep;
38extern struct kmem_cache *btrfs_bit_radix_cachep;
Chris Mason2c90e5d2007-04-02 10:50:19 -040039extern struct kmem_cache *btrfs_path_cachep;
Chris Masone6dcd2d2008-07-17 12:53:50 -040040struct btrfs_ordered_sum;
Chris Masone089f052007-03-16 16:20:31 -040041
Chris Mason2a7108a2008-12-02 09:58:02 -050042#define BTRFS_MAGIC "_BHRfS_M"
Chris Masoneb60cea2007-02-02 09:18:22 -050043
Chris Mason4008c042009-02-12 14:09:45 -050044#define BTRFS_MAX_LEVEL 8
Chris Mason0b86a832008-03-24 15:01:56 -040045
Yan Zheng5d4f98a2009-06-10 10:45:14 -040046#define BTRFS_COMPAT_EXTENT_TREE_V0
47
Chris Mason5a3f23d2009-03-31 13:27:11 -040048/*
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
52 */
53#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
54
Chris Mason0b86a832008-03-24 15:01:56 -040055/* holds pointers to all of the tree roots */
Chris Mason6407bf62007-03-27 06:33:00 -040056#define BTRFS_ROOT_TREE_OBJECTID 1ULL
Chris Mason0b86a832008-03-24 15:01:56 -040057
58/* stores information about which extents are in use, and reference counts */
Chris Mason0cf6c622007-06-09 09:22:25 -040059#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
Chris Mason0b86a832008-03-24 15:01:56 -040060
Chris Mason0b86a832008-03-24 15:01:56 -040061/*
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
64 */
Chris Masone085def2008-03-24 15:02:07 -040065#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
Chris Mason0b86a832008-03-24 15:01:56 -040066
67/*
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
70 */
Chris Masone085def2008-03-24 15:02:07 -040071#define BTRFS_DEV_TREE_OBJECTID 4ULL
72
73/* one per subvolume, storing files and directories */
74#define BTRFS_FS_TREE_OBJECTID 5ULL
75
76/* directory objectid inside the root tree */
77#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
Chris Mason0b86a832008-03-24 15:01:56 -040078
Chris Masond20f7042008-12-08 16:58:54 -050079/* holds checksums of all the data extents */
80#define BTRFS_CSUM_TREE_OBJECTID 7ULL
81
Josef Bacik7b128762008-07-24 12:17:14 -040082/* orhpan objectid for tracking unlinked/truncated files */
83#define BTRFS_ORPHAN_OBJECTID -5ULL
84
Chris Masone02119d2008-09-05 16:13:11 -040085/* does write ahead logging to speed up fsyncs */
86#define BTRFS_TREE_LOG_OBJECTID -6ULL
87#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
88
Zheng Yane4657682008-09-26 10:04:53 -040089/* for space balancing */
90#define BTRFS_TREE_RELOC_OBJECTID -8ULL
91#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
92
Chris Masond20f7042008-12-08 16:58:54 -050093/*
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
96 * for fsyncs
97 */
98#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
99
Zheng Yan31840ae2008-09-23 13:14:14 -0400100/* dummy objectid represents multiple objectids */
101#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
102
Chris Mason0b86a832008-03-24 15:01:56 -0400103/*
Zheng Yan6527cdb2008-09-05 16:43:53 -0400104 * All files have objectids in this range.
Chris Mason0b86a832008-03-24 15:01:56 -0400105 */
Chris Masonf6dbff52007-12-13 11:13:32 -0500106#define BTRFS_FIRST_FREE_OBJECTID 256ULL
Zheng Yan6527cdb2008-09-05 16:43:53 -0400107#define BTRFS_LAST_FREE_OBJECTID -256ULL
Chris Masone17cade2008-04-15 15:41:47 -0400108#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
Chris Mason3768f362007-03-13 16:47:54 -0400109
Chris Mason0b86a832008-03-24 15:01:56 -0400110
111/*
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
114 */
115#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
116
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400117#define BTRFS_BTREE_INODE_OBJECTID 1
118
119#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
120
Chris Masonfec577f2007-02-26 10:40:21 -0500121/*
Chris Masone20d96d2007-03-22 12:13:20 -0400122 * we can actually store much bigger names, but lets not confuse the rest
123 * of linux
124 */
125#define BTRFS_NAME_LEN 255
126
Chris Masonf254e522007-03-29 15:15:27 -0400127/* 32 bytes in various csum fields */
128#define BTRFS_CSUM_SIZE 32
Josef Bacik607d4322008-12-02 07:17:45 -0500129
130/* csum types */
131#define BTRFS_CSUM_TYPE_CRC32 0
132
133static int btrfs_csum_sizes[] = { 4, 0 };
134
Chris Mason509659c2007-05-10 12:36:17 -0400135/* four bytes for CRC32 */
Chris Mason39544012007-12-12 14:38:19 -0500136#define BTRFS_EMPTY_DIR_SIZE 0
Chris Masonf254e522007-03-29 15:15:27 -0400137
Chris Masonfabb5682007-06-07 22:13:21 -0400138#define BTRFS_FT_UNKNOWN 0
139#define BTRFS_FT_REG_FILE 1
140#define BTRFS_FT_DIR 2
141#define BTRFS_FT_CHRDEV 3
142#define BTRFS_FT_BLKDEV 4
143#define BTRFS_FT_FIFO 5
144#define BTRFS_FT_SOCK 6
145#define BTRFS_FT_SYMLINK 7
Josef Bacik5103e942007-11-16 11:45:54 -0500146#define BTRFS_FT_XATTR 8
147#define BTRFS_FT_MAX 9
Chris Masonfabb5682007-06-07 22:13:21 -0400148
Chris Masone20d96d2007-03-22 12:13:20 -0400149/*
Wu Fengguangd4a78942009-04-02 16:46:06 -0400150 * The key defines the order in the tree, and so it also defines (optimal)
151 * block layout.
152 *
153 * objectid corresponds to the inode number.
154 *
155 * type tells us things about the object, and is a kind of stream selector.
156 * so for a given inode, keys with type of 1 might refer to the inode data,
157 * type of 2 may point to file data in the btree and type == 3 may point to
158 * extents.
Chris Masonfec577f2007-02-26 10:40:21 -0500159 *
160 * offset is the starting byte offset for this key in the stream.
Chris Masone2fa7222007-03-12 16:22:34 -0400161 *
162 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
163 * in cpu native order. Otherwise they are identical and their sizes
164 * should be the same (ie both packed)
Chris Masonfec577f2007-02-26 10:40:21 -0500165 */
Chris Masone2fa7222007-03-12 16:22:34 -0400166struct btrfs_disk_key {
167 __le64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400168 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400169 __le64 offset;
Chris Masone2fa7222007-03-12 16:22:34 -0400170} __attribute__ ((__packed__));
171
172struct btrfs_key {
Chris Masoneb60cea2007-02-02 09:18:22 -0500173 u64 objectid;
Chris Mason5f39d392007-10-15 16:14:19 -0400174 u8 type;
Chris Mason70b2bef2007-04-17 15:39:32 -0400175 u64 offset;
Chris Masoneb60cea2007-02-02 09:18:22 -0500176} __attribute__ ((__packed__));
177
Chris Mason0b86a832008-03-24 15:01:56 -0400178struct btrfs_mapping_tree {
179 struct extent_map_tree map_tree;
180};
181
Chris Masone17cade2008-04-15 15:41:47 -0400182#define BTRFS_UUID_SIZE 16
Chris Mason0b86a832008-03-24 15:01:56 -0400183struct btrfs_dev_item {
184 /* the internal btrfs device id */
185 __le64 devid;
186
187 /* size of the device */
188 __le64 total_bytes;
189
190 /* bytes used */
191 __le64 bytes_used;
192
193 /* optimal io alignment for this device */
194 __le32 io_align;
195
196 /* optimal io width for this device */
197 __le32 io_width;
198
199 /* minimal io size for this device */
200 __le32 sector_size;
201
Chris Mason0b86a832008-03-24 15:01:56 -0400202 /* type and info about this device */
203 __le64 type;
204
Yan Zheng2b820322008-11-17 21:11:30 -0500205 /* expected generation for this device */
206 __le64 generation;
207
Chris Masonc3027eb2008-12-08 16:40:21 -0500208 /*
209 * starting byte of this partition on the device,
Wu Fengguangd4a78942009-04-02 16:46:06 -0400210 * to allow for stripe alignment in the future
Chris Masonc3027eb2008-12-08 16:40:21 -0500211 */
212 __le64 start_offset;
213
Chris Masone17cade2008-04-15 15:41:47 -0400214 /* grouping information for allocation decisions */
215 __le32 dev_group;
216
217 /* seek speed 0-100 where 100 is fastest */
218 u8 seek_speed;
219
220 /* bandwidth 0-100 where 100 is fastest */
221 u8 bandwidth;
222
Chris Mason0d81ba52008-03-24 15:02:07 -0400223 /* btrfs generated uuid for this device */
Chris Masone17cade2008-04-15 15:41:47 -0400224 u8 uuid[BTRFS_UUID_SIZE];
Yan Zheng2b820322008-11-17 21:11:30 -0500225
226 /* uuid of FS who owns this device */
227 u8 fsid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400228} __attribute__ ((__packed__));
229
230struct btrfs_stripe {
231 __le64 devid;
232 __le64 offset;
Chris Masone17cade2008-04-15 15:41:47 -0400233 u8 dev_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400234} __attribute__ ((__packed__));
235
236struct btrfs_chunk {
Chris Masone17cade2008-04-15 15:41:47 -0400237 /* size of this chunk in bytes */
238 __le64 length;
239
240 /* objectid of the root referencing this chunk */
Chris Mason0b86a832008-03-24 15:01:56 -0400241 __le64 owner;
Chris Masone17cade2008-04-15 15:41:47 -0400242
Chris Mason0b86a832008-03-24 15:01:56 -0400243 __le64 stripe_len;
244 __le64 type;
245
246 /* optimal io alignment for this chunk */
247 __le32 io_align;
248
249 /* optimal io width for this chunk */
250 __le32 io_width;
251
252 /* minimal io size for this chunk */
253 __le32 sector_size;
254
255 /* 2^16 stripes is quite a lot, a second limit is the size of a single
256 * item in the btree
257 */
258 __le16 num_stripes;
Chris Mason321aecc2008-04-16 10:49:51 -0400259
260 /* sub stripes only matter for raid10 */
261 __le16 sub_stripes;
Chris Mason0b86a832008-03-24 15:01:56 -0400262 struct btrfs_stripe stripe;
263 /* additional stripes go here */
264} __attribute__ ((__packed__));
265
266static inline unsigned long btrfs_chunk_item_size(int num_stripes)
267{
268 BUG_ON(num_stripes == 0);
269 return sizeof(struct btrfs_chunk) +
270 sizeof(struct btrfs_stripe) * (num_stripes - 1);
271}
272
Chris Mason5f39d392007-10-15 16:14:19 -0400273#define BTRFS_FSID_SIZE 16
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400274#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
275#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
276#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
277#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
278
279#define BTRFS_BACKREF_REV_MAX 256
280#define BTRFS_BACKREF_REV_SHIFT 56
281#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
282 BTRFS_BACKREF_REV_SHIFT)
283
284#define BTRFS_OLD_BACKREF_REV 0
285#define BTRFS_MIXED_BACKREF_REV 1
Chris Mason63b10fc2008-04-01 11:21:32 -0400286
Chris Masonfec577f2007-02-26 10:40:21 -0500287/*
288 * every tree block (leaf or node) starts with this header.
289 */
Chris Masonbb492bb2007-03-12 12:29:44 -0400290struct btrfs_header {
Chris Masone17cade2008-04-15 15:41:47 -0400291 /* these first four must match the super block */
Chris Masonf254e522007-03-29 15:15:27 -0400292 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason5f39d392007-10-15 16:14:19 -0400293 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400294 __le64 bytenr; /* which block this node is supposed to live in */
Chris Mason63b10fc2008-04-01 11:21:32 -0400295 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400296
297 /* allowed to be different from the super from here on down */
298 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason7f5c1512007-03-23 15:56:19 -0400299 __le64 generation;
Chris Mason4d775672007-04-20 20:23:12 -0400300 __le64 owner;
Chris Mason5f39d392007-10-15 16:14:19 -0400301 __le32 nritems;
Chris Mason9a6f11e2007-03-27 09:06:38 -0400302 u8 level;
Chris Masoneb60cea2007-02-02 09:18:22 -0500303} __attribute__ ((__packed__));
304
Chris Mason5f39d392007-10-15 16:14:19 -0400305#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
Chris Masond3977122009-01-05 21:25:51 -0500306 sizeof(struct btrfs_header)) / \
307 sizeof(struct btrfs_key_ptr))
Chris Mason123abc82007-03-14 14:14:43 -0400308#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
Chris Mason5f39d392007-10-15 16:14:19 -0400309#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
Chris Mason236454df2007-04-19 13:37:44 -0400310#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
311 sizeof(struct btrfs_item) - \
312 sizeof(struct btrfs_file_extent_item))
Yan, Zhengf34f57a2009-11-12 09:35:27 +0000313#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
314 sizeof(struct btrfs_item) -\
315 sizeof(struct btrfs_dir_item))
Chris Masoneb60cea2007-02-02 09:18:22 -0500316
Chris Mason0b86a832008-03-24 15:01:56 -0400317
318/*
319 * this is a very generous portion of the super block, giving us
320 * room to translate 14 chunks with 3 stripes each.
321 */
322#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
Chris Mason7ae9c092008-04-18 10:29:49 -0400323#define BTRFS_LABEL_SIZE 256
Chris Mason0b86a832008-03-24 15:01:56 -0400324
Chris Masonfec577f2007-02-26 10:40:21 -0500325/*
Chris Masonfec577f2007-02-26 10:40:21 -0500326 * the super block basically lists the main trees of the FS
327 * it currently lacks any block count etc etc
328 */
Chris Mason234b63a2007-03-13 10:46:10 -0400329struct btrfs_super_block {
Chris Masonf254e522007-03-29 15:15:27 -0400330 u8 csum[BTRFS_CSUM_SIZE];
Chris Mason63b10fc2008-04-01 11:21:32 -0400331 /* the first 4 fields must match struct btrfs_header */
Yan Zheng2b820322008-11-17 21:11:30 -0500332 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
Chris Masondb945352007-10-15 16:15:53 -0400333 __le64 bytenr; /* this block number */
Chris Mason63b10fc2008-04-01 11:21:32 -0400334 __le64 flags;
Chris Masone17cade2008-04-15 15:41:47 -0400335
336 /* allowed to be different from the btrfs_header from here own down */
Chris Mason3768f362007-03-13 16:47:54 -0400337 __le64 magic;
Chris Mason3768f362007-03-13 16:47:54 -0400338 __le64 generation;
339 __le64 root;
Chris Mason0b86a832008-03-24 15:01:56 -0400340 __le64 chunk_root;
Chris Masone02119d2008-09-05 16:13:11 -0400341 __le64 log_root;
Chris Masonc3027eb2008-12-08 16:40:21 -0500342
343 /* this will help find the new super based on the log root */
344 __le64 log_root_transid;
Chris Masondb945352007-10-15 16:15:53 -0400345 __le64 total_bytes;
346 __le64 bytes_used;
Chris Mason2e635a22007-03-21 11:12:56 -0400347 __le64 root_dir_objectid;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400348 __le64 num_devices;
Chris Mason5f39d392007-10-15 16:14:19 -0400349 __le32 sectorsize;
350 __le32 nodesize;
351 __le32 leafsize;
Chris Mason87ee04e2007-11-30 11:30:34 -0500352 __le32 stripesize;
Chris Mason0b86a832008-03-24 15:01:56 -0400353 __le32 sys_chunk_array_size;
Yan Zheng84234f32008-10-29 14:49:05 -0400354 __le64 chunk_root_generation;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500355 __le64 compat_flags;
356 __le64 compat_ro_flags;
357 __le64 incompat_flags;
Josef Bacik607d4322008-12-02 07:17:45 -0500358 __le16 csum_type;
Chris Masondb945352007-10-15 16:15:53 -0400359 u8 root_level;
Chris Mason0b86a832008-03-24 15:01:56 -0400360 u8 chunk_root_level;
Chris Masone02119d2008-09-05 16:13:11 -0400361 u8 log_root_level;
Chris Mason0d81ba52008-03-24 15:02:07 -0400362 struct btrfs_dev_item dev_item;
Chris Masonc3027eb2008-12-08 16:40:21 -0500363
Chris Mason7ae9c092008-04-18 10:29:49 -0400364 char label[BTRFS_LABEL_SIZE];
Chris Masonc3027eb2008-12-08 16:40:21 -0500365
366 /* future expansion */
367 __le64 reserved[32];
Chris Mason0b86a832008-03-24 15:01:56 -0400368 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
Chris Masoncfaa7292007-02-21 17:04:57 -0500369} __attribute__ ((__packed__));
370
Chris Masonfec577f2007-02-26 10:40:21 -0500371/*
Josef Bacikf2b636e2008-12-02 06:36:08 -0500372 * Compat flags that we support. If any incompat flags are set other than the
373 * ones specified below then we will fail to mount
374 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400375#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
376
377#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
378#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
379#define BTRFS_FEATURE_INCOMPAT_SUPP \
380 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
Josef Bacikf2b636e2008-12-02 06:36:08 -0500381
382/*
Chris Mason62e27492007-03-15 12:56:47 -0400383 * A leaf is full of items. offset and size tell us where to find
Chris Masonfec577f2007-02-26 10:40:21 -0500384 * the item in the leaf (relative to the start of the data area)
385 */
Chris Mason0783fcf2007-03-12 20:12:07 -0400386struct btrfs_item {
Chris Masone2fa7222007-03-12 16:22:34 -0400387 struct btrfs_disk_key key;
Chris Mason123abc82007-03-14 14:14:43 -0400388 __le32 offset;
Chris Mason5f39d392007-10-15 16:14:19 -0400389 __le32 size;
Chris Masoneb60cea2007-02-02 09:18:22 -0500390} __attribute__ ((__packed__));
391
Chris Masonfec577f2007-02-26 10:40:21 -0500392/*
393 * leaves have an item area and a data area:
394 * [item0, item1....itemN] [free space] [dataN...data1, data0]
395 *
396 * The data is separate from the items to get the keys closer together
397 * during searches.
398 */
Chris Mason234b63a2007-03-13 10:46:10 -0400399struct btrfs_leaf {
Chris Masonbb492bb2007-03-12 12:29:44 -0400400 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400401 struct btrfs_item items[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500402} __attribute__ ((__packed__));
403
Chris Masonfec577f2007-02-26 10:40:21 -0500404/*
405 * all non-leaf blocks are nodes, they hold only keys and pointers to
406 * other blocks
407 */
Chris Mason123abc82007-03-14 14:14:43 -0400408struct btrfs_key_ptr {
409 struct btrfs_disk_key key;
410 __le64 blockptr;
Chris Mason74493f72007-12-11 09:25:06 -0500411 __le64 generation;
Chris Mason123abc82007-03-14 14:14:43 -0400412} __attribute__ ((__packed__));
413
Chris Mason234b63a2007-03-13 10:46:10 -0400414struct btrfs_node {
Chris Masonbb492bb2007-03-12 12:29:44 -0400415 struct btrfs_header header;
Chris Mason123abc82007-03-14 14:14:43 -0400416 struct btrfs_key_ptr ptrs[];
Chris Masoneb60cea2007-02-02 09:18:22 -0500417} __attribute__ ((__packed__));
418
Chris Masonfec577f2007-02-26 10:40:21 -0500419/*
Chris Mason234b63a2007-03-13 10:46:10 -0400420 * btrfs_paths remember the path taken from the root down to the leaf.
421 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
Chris Masonfec577f2007-02-26 10:40:21 -0500422 * to any other levels that are present.
423 *
424 * The slots array records the index of the item or block pointer
425 * used while walking the tree.
426 */
Chris Mason234b63a2007-03-13 10:46:10 -0400427struct btrfs_path {
Chris Mason5f39d392007-10-15 16:14:19 -0400428 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
Chris Mason234b63a2007-03-13 10:46:10 -0400429 int slots[BTRFS_MAX_LEVEL];
Chris Mason925baed2008-06-25 16:01:30 -0400430 /* if there is real range locking, this locks field will change */
431 int locks[BTRFS_MAX_LEVEL];
Chris Mason3c69fae2007-08-07 15:52:22 -0400432 int reada;
Chris Mason925baed2008-06-25 16:01:30 -0400433 /* keep some upper locks as we walk down */
Chris Mason6702ed42007-08-07 16:15:09 -0400434 int lowest_level;
Chris Mason459931e2008-12-10 09:10:46 -0500435
436 /*
437 * set by btrfs_split_item, tells search_slot to keep all locks
438 * and to force calls to keep space in the nodes
439 */
Chris Masonb9473432009-03-13 11:00:37 -0400440 unsigned int search_for_split:1;
441 unsigned int keep_locks:1;
442 unsigned int skip_locking:1;
443 unsigned int leave_spinning:1;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400444 unsigned int search_commit_root:1;
Chris Masoneb60cea2007-02-02 09:18:22 -0500445};
Chris Mason5de08d72007-02-24 06:24:44 -0500446
Chris Mason62e27492007-03-15 12:56:47 -0400447/*
448 * items in the extent btree are used to record the objectid of the
449 * owner of the block and the number of references
450 */
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400451
Chris Mason62e27492007-03-15 12:56:47 -0400452struct btrfs_extent_item {
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400453 __le64 refs;
454 __le64 generation;
455 __le64 flags;
456} __attribute__ ((__packed__));
457
458struct btrfs_extent_item_v0 {
Chris Mason62e27492007-03-15 12:56:47 -0400459 __le32 refs;
Chris Mason74493f72007-12-11 09:25:06 -0500460} __attribute__ ((__packed__));
461
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400462#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
463 sizeof(struct btrfs_item))
464
465#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
466#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
467
468/* following flags only apply to tree blocks */
469
470/* use full backrefs for extent pointers in the block */
471#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
472
473struct btrfs_tree_block_info {
474 struct btrfs_disk_key key;
475 u8 level;
476} __attribute__ ((__packed__));
477
478struct btrfs_extent_data_ref {
479 __le64 root;
480 __le64 objectid;
481 __le64 offset;
482 __le32 count;
483} __attribute__ ((__packed__));
484
485struct btrfs_shared_data_ref {
486 __le32 count;
487} __attribute__ ((__packed__));
488
489struct btrfs_extent_inline_ref {
490 u8 type;
Yan Zheng1bec1ae2009-07-22 09:59:00 -0400491 __le64 offset;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400492} __attribute__ ((__packed__));
493
494/* old style backrefs item */
495struct btrfs_extent_ref_v0 {
Chris Mason74493f72007-12-11 09:25:06 -0500496 __le64 root;
497 __le64 generation;
498 __le64 objectid;
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400499 __le32 count;
Chris Mason62e27492007-03-15 12:56:47 -0400500} __attribute__ ((__packed__));
501
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400502
Chris Mason0b86a832008-03-24 15:01:56 -0400503/* dev extents record free space on individual devices. The owner
504 * field points back to the chunk allocation mapping tree that allocated
Chris Masone17cade2008-04-15 15:41:47 -0400505 * the extent. The chunk tree uuid field is a way to double check the owner
Chris Mason0b86a832008-03-24 15:01:56 -0400506 */
507struct btrfs_dev_extent {
Chris Masone17cade2008-04-15 15:41:47 -0400508 __le64 chunk_tree;
509 __le64 chunk_objectid;
510 __le64 chunk_offset;
Chris Mason0b86a832008-03-24 15:01:56 -0400511 __le64 length;
Chris Masone17cade2008-04-15 15:41:47 -0400512 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason0b86a832008-03-24 15:01:56 -0400513} __attribute__ ((__packed__));
514
Chris Mason39544012007-12-12 14:38:19 -0500515struct btrfs_inode_ref {
Josef Bacikaec74772008-07-24 12:12:38 -0400516 __le64 index;
Chris Mason39544012007-12-12 14:38:19 -0500517 __le16 name_len;
518 /* name goes here */
519} __attribute__ ((__packed__));
520
Chris Mason0b86a832008-03-24 15:01:56 -0400521struct btrfs_timespec {
Chris Masonf254e522007-03-29 15:15:27 -0400522 __le64 sec;
Chris Mason1e1d2702007-03-15 19:03:33 -0400523 __le32 nsec;
524} __attribute__ ((__packed__));
525
Jan Engelhardt95029d72009-01-21 10:49:16 -0500526enum btrfs_compression_type {
Chris Masonc8b97812008-10-29 14:49:59 -0400527 BTRFS_COMPRESS_NONE = 0,
528 BTRFS_COMPRESS_ZLIB = 1,
529 BTRFS_COMPRESS_LAST = 2,
Jan Engelhardt95029d72009-01-21 10:49:16 -0500530};
Chris Masonc8b97812008-10-29 14:49:59 -0400531
Chris Mason1e1d2702007-03-15 19:03:33 -0400532struct btrfs_inode_item {
Chris Masone02119d2008-09-05 16:13:11 -0400533 /* nfs style generation number */
Chris Mason1e1d2702007-03-15 19:03:33 -0400534 __le64 generation;
Chris Masone02119d2008-09-05 16:13:11 -0400535 /* transid that last touched this inode */
536 __le64 transid;
Chris Mason1e1d2702007-03-15 19:03:33 -0400537 __le64 size;
Yan Zhenga76a3cd2008-10-09 11:46:29 -0400538 __le64 nbytes;
Chris Mason31f3c992007-04-30 15:25:45 -0400539 __le64 block_group;
Chris Mason1e1d2702007-03-15 19:03:33 -0400540 __le32 nlink;
541 __le32 uid;
542 __le32 gid;
543 __le32 mode;
Chris Mason0b86a832008-03-24 15:01:56 -0400544 __le64 rdev;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500545 __le64 flags;
Chris Masonc8b97812008-10-29 14:49:59 -0400546
Chris Masonc3027eb2008-12-08 16:40:21 -0500547 /* modification sequence number for NFS */
548 __le64 sequence;
549
550 /*
551 * a little future expansion, for more than this we can
552 * just grow the inode item and version it
553 */
554 __le64 reserved[4];
Chris Mason0b86a832008-03-24 15:01:56 -0400555 struct btrfs_timespec atime;
556 struct btrfs_timespec ctime;
557 struct btrfs_timespec mtime;
558 struct btrfs_timespec otime;
Chris Mason1e1d2702007-03-15 19:03:33 -0400559} __attribute__ ((__packed__));
560
Chris Masone02119d2008-09-05 16:13:11 -0400561struct btrfs_dir_log_item {
562 __le64 end;
563} __attribute__ ((__packed__));
564
Chris Mason62e27492007-03-15 12:56:47 -0400565struct btrfs_dir_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400566 struct btrfs_disk_key location;
Chris Masone02119d2008-09-05 16:13:11 -0400567 __le64 transid;
Josef Bacik5103e942007-11-16 11:45:54 -0500568 __le16 data_len;
Chris Masona8a2ee02007-03-16 08:46:49 -0400569 __le16 name_len;
Chris Mason62e27492007-03-15 12:56:47 -0400570 u8 type;
571} __attribute__ ((__packed__));
572
573struct btrfs_root_item {
Chris Masond6e4a422007-04-06 15:37:36 -0400574 struct btrfs_inode_item inode;
Yan Zheng84234f32008-10-29 14:49:05 -0400575 __le64 generation;
Chris Masond6e4a422007-04-06 15:37:36 -0400576 __le64 root_dirid;
Chris Masondb945352007-10-15 16:15:53 -0400577 __le64 bytenr;
578 __le64 byte_limit;
579 __le64 bytes_used;
Yan Zheng80ff3852008-10-30 14:20:02 -0400580 __le64 last_snapshot;
Josef Bacikf2b636e2008-12-02 06:36:08 -0500581 __le64 flags;
Chris Mason62e27492007-03-15 12:56:47 -0400582 __le32 refs;
Chris Mason5eda7b52007-06-22 14:16:25 -0400583 struct btrfs_disk_key drop_progress;
584 u8 drop_level;
Chris Masondb945352007-10-15 16:15:53 -0400585 u8 level;
Chris Mason9f5fae22007-03-20 14:38:32 -0400586} __attribute__ ((__packed__));
587
Chris Mason0660b5a2008-11-17 20:37:39 -0500588/*
589 * this is used for both forward and backward root refs
590 */
591struct btrfs_root_ref {
592 __le64 dirid;
593 __le64 sequence;
594 __le16 name_len;
595} __attribute__ ((__packed__));
596
Yan Zhengd899e052008-10-30 14:25:28 -0400597#define BTRFS_FILE_EXTENT_INLINE 0
598#define BTRFS_FILE_EXTENT_REG 1
599#define BTRFS_FILE_EXTENT_PREALLOC 2
Chris Mason236454df2007-04-19 13:37:44 -0400600
Chris Mason9f5fae22007-03-20 14:38:32 -0400601struct btrfs_file_extent_item {
Chris Masonc8b97812008-10-29 14:49:59 -0400602 /*
603 * transaction id that created this extent
604 */
Chris Mason71951f32007-03-27 09:16:29 -0400605 __le64 generation;
Chris Masonc8b97812008-10-29 14:49:59 -0400606 /*
607 * max number of bytes to hold this extent in ram
608 * when we split a compressed extent we can't know how big
609 * each of the resulting pieces will be. So, this is
610 * an upper limit on the size of the extent in ram instead of
611 * an exact limit.
612 */
613 __le64 ram_bytes;
614
615 /*
616 * 32 bits for the various ways we might encode the data,
617 * including compression and encryption. If any of these
618 * are set to something a given disk format doesn't understand
619 * it is treated like an incompat flag for reading and writing,
620 * but not for stat.
621 */
622 u8 compression;
623 u8 encryption;
624 __le16 other_encoding; /* spare for later use */
625
626 /* are we inline data or a real extent? */
Chris Mason236454df2007-04-19 13:37:44 -0400627 u8 type;
Chris Masonc8b97812008-10-29 14:49:59 -0400628
Chris Mason9f5fae22007-03-20 14:38:32 -0400629 /*
630 * disk space consumed by the extent, checksum blocks are included
631 * in these numbers
632 */
Chris Masondb945352007-10-15 16:15:53 -0400633 __le64 disk_bytenr;
634 __le64 disk_num_bytes;
Chris Mason9f5fae22007-03-20 14:38:32 -0400635 /*
Chris Masondee26a92007-03-26 16:00:06 -0400636 * the logical offset in file blocks (no csums)
Chris Mason9f5fae22007-03-20 14:38:32 -0400637 * this extent record is for. This allows a file extent to point
638 * into the middle of an existing extent on disk, sharing it
639 * between two snapshots (useful if some bytes in the middle of the
640 * extent have changed
641 */
642 __le64 offset;
643 /*
Chris Masonc8b97812008-10-29 14:49:59 -0400644 * the logical number of file blocks (no csums included). This
645 * always reflects the size uncompressed and without encoding.
Chris Mason9f5fae22007-03-20 14:38:32 -0400646 */
Chris Masondb945352007-10-15 16:15:53 -0400647 __le64 num_bytes;
Chris Masonc8b97812008-10-29 14:49:59 -0400648
Chris Mason9f5fae22007-03-20 14:38:32 -0400649} __attribute__ ((__packed__));
650
Chris Masonf254e522007-03-29 15:15:27 -0400651struct btrfs_csum_item {
Chris Mason509659c2007-05-10 12:36:17 -0400652 u8 csum;
Chris Masonf254e522007-03-29 15:15:27 -0400653} __attribute__ ((__packed__));
654
Chris Mason0b86a832008-03-24 15:01:56 -0400655/* different types of block groups (and chunks) */
656#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
657#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
658#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
Chris Mason593060d2008-03-25 16:50:33 -0400659#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
Chris Mason8790d502008-04-03 16:29:03 -0400660#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
Chris Mason611f0e02008-04-03 16:29:03 -0400661#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
Chris Mason321aecc2008-04-16 10:49:51 -0400662#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
Chris Mason1e2677e2007-05-29 16:52:18 -0400663
Chris Mason9078a3e2007-04-26 16:46:15 -0400664struct btrfs_block_group_item {
665 __le64 used;
Chris Mason0b86a832008-03-24 15:01:56 -0400666 __le64 chunk_objectid;
667 __le64 flags;
Chris Mason9078a3e2007-04-26 16:46:15 -0400668} __attribute__ ((__packed__));
669
Chris Mason6324fbf2008-03-24 15:01:59 -0400670struct btrfs_space_info {
671 u64 flags;
Josef Bacik6a632092009-02-20 11:00:09 -0500672
673 u64 total_bytes; /* total bytes in the space */
674 u64 bytes_used; /* total bytes used on disk */
675 u64 bytes_pinned; /* total bytes pinned, will be freed when the
676 transaction finishes */
677 u64 bytes_reserved; /* total bytes the allocator has reserved for
678 current allocations */
679 u64 bytes_readonly; /* total bytes that are read only */
Josef Bacik1b2da372009-09-11 16:11:20 -0400680 u64 bytes_super; /* total bytes reserved for the super blocks */
Josef Bacik9ed74f22009-09-11 16:12:44 -0400681 u64 bytes_root; /* the number of bytes needed to commit a
682 transaction */
Josef Bacik6a632092009-02-20 11:00:09 -0500683 u64 bytes_may_use; /* number of bytes that may be used for
Josef Bacik9ed74f22009-09-11 16:12:44 -0400684 delalloc/allocations */
685 u64 bytes_delalloc; /* number of bytes currently reserved for
686 delayed allocation */
Josef Bacik6a632092009-02-20 11:00:09 -0500687
688 int full; /* indicates that we cannot allocate any more
689 chunks for this space */
690 int force_alloc; /* set if we need to force a chunk alloc for
691 this space */
Josef Bacik9ed74f22009-09-11 16:12:44 -0400692 int force_delalloc; /* make people start doing filemap_flush until
693 we're under a threshold */
Josef Bacik6a632092009-02-20 11:00:09 -0500694
Chris Mason6324fbf2008-03-24 15:01:59 -0400695 struct list_head list;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400696
Josef Bacike3ccfa92009-10-07 20:44:34 -0400697 /* for controlling how we free up space for allocations */
698 wait_queue_head_t allocate_wait;
699 wait_queue_head_t flush_wait;
700 int allocating_chunk;
701 int flushing;
702
Josef Bacik0f9dd462008-09-23 13:14:11 -0400703 /* for block groups in our same type */
704 struct list_head block_groups;
705 spinlock_t lock;
Josef Bacik80eb2342008-10-29 14:49:05 -0400706 struct rw_semaphore groups_sem;
Josef Bacik817d52f2009-07-13 21:29:25 -0400707 atomic_t caching_threads;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400708};
709
Chris Masonfa9c0d792009-04-03 09:47:43 -0400710/*
711 * free clusters are used to claim free space in relatively large chunks,
712 * allowing us to do less seeky writes. They are used for all metadata
713 * allocations and data allocations in ssd mode.
714 */
715struct btrfs_free_cluster {
716 spinlock_t lock;
717 spinlock_t refill_lock;
718 struct rb_root root;
719
720 /* largest extent in this cluster */
721 u64 max_size;
722
723 /* first extent starting offset */
724 u64 window_start;
725
Josef Bacik96303082009-07-13 21:29:25 -0400726 /* if this cluster simply points at a bitmap in the block group */
727 bool points_to_bitmap;
728
Chris Masonfa9c0d792009-04-03 09:47:43 -0400729 struct btrfs_block_group_cache *block_group;
730 /*
731 * when a cluster is allocated from a block group, we put the
732 * cluster onto a list in the block group so that it can
733 * be freed before the block group is freed.
734 */
735 struct list_head block_group_list;
Chris Mason6324fbf2008-03-24 15:01:59 -0400736};
737
Josef Bacik817d52f2009-07-13 21:29:25 -0400738enum btrfs_caching_type {
739 BTRFS_CACHE_NO = 0,
740 BTRFS_CACHE_STARTED = 1,
741 BTRFS_CACHE_FINISHED = 2,
742};
743
Yan Zheng11833d62009-09-11 16:11:19 -0400744struct btrfs_caching_control {
745 struct list_head list;
746 struct mutex mutex;
747 wait_queue_head_t wait;
748 struct btrfs_block_group_cache *block_group;
749 u64 progress;
750 atomic_t count;
751};
752
Chris Mason9078a3e2007-04-26 16:46:15 -0400753struct btrfs_block_group_cache {
754 struct btrfs_key key;
755 struct btrfs_block_group_item item;
Josef Bacik817d52f2009-07-13 21:29:25 -0400756 struct btrfs_fs_info *fs_info;
Chris Masonc286ac42008-07-22 23:06:41 -0400757 spinlock_t lock;
Yan324ae4d2007-11-16 14:57:08 -0500758 u64 pinned;
Zheng Yane8569812008-09-26 10:05:48 -0400759 u64 reserved;
Josef Bacik1b2da372009-09-11 16:11:20 -0400760 u64 bytes_super;
Chris Mason0b86a832008-03-24 15:01:56 -0400761 u64 flags;
Josef Bacik96303082009-07-13 21:29:25 -0400762 u64 sectorsize;
763 int extents_thresh;
764 int free_extents;
765 int total_bitmaps;
Chris Mason8f18cf12008-04-25 16:53:30 -0400766 int ro;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400767 int dirty;
768
Josef Bacik817d52f2009-07-13 21:29:25 -0400769 /* cache tracking stuff */
Josef Bacik817d52f2009-07-13 21:29:25 -0400770 int cached;
Yan Zheng11833d62009-09-11 16:11:19 -0400771 struct btrfs_caching_control *caching_ctl;
772 u64 last_byte_to_unpin;
Josef Bacik817d52f2009-07-13 21:29:25 -0400773
Josef Bacik0f9dd462008-09-23 13:14:11 -0400774 struct btrfs_space_info *space_info;
775
776 /* free space cache stuff */
Josef Bacik6226cb0a2009-04-03 10:14:18 -0400777 spinlock_t tree_lock;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400778 struct rb_root free_space_offset;
Josef Bacik817d52f2009-07-13 21:29:25 -0400779 u64 free_space;
Josef Bacik0f9dd462008-09-23 13:14:11 -0400780
781 /* block group cache stuff */
782 struct rb_node cache_node;
783
784 /* for block groups in the same raid type */
785 struct list_head list;
Yan Zhengd2fb3432008-12-11 16:30:39 -0500786
787 /* usage count */
788 atomic_t count;
Chris Masonfa9c0d792009-04-03 09:47:43 -0400789
790 /* List of struct btrfs_free_clusters for this block group.
791 * Today it will only have one thing on it, but that may change
792 */
793 struct list_head cluster_list;
Chris Mason9078a3e2007-04-26 16:46:15 -0400794};
Chris Mason0b86a832008-03-24 15:01:56 -0400795
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400796struct reloc_control;
Chris Mason0b86a832008-03-24 15:01:56 -0400797struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400798struct btrfs_fs_devices;
Chris Mason9f5fae22007-03-20 14:38:32 -0400799struct btrfs_fs_info {
Chris Mason5f39d392007-10-15 16:14:19 -0400800 u8 fsid[BTRFS_FSID_SIZE];
Chris Masone17cade2008-04-15 15:41:47 -0400801 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
Chris Mason9f5fae22007-03-20 14:38:32 -0400802 struct btrfs_root *extent_root;
803 struct btrfs_root *tree_root;
Chris Mason0b86a832008-03-24 15:01:56 -0400804 struct btrfs_root *chunk_root;
805 struct btrfs_root *dev_root;
Chris Mason3de45862008-11-17 21:02:50 -0500806 struct btrfs_root *fs_root;
Chris Masond20f7042008-12-08 16:58:54 -0500807 struct btrfs_root *csum_root;
Chris Masone02119d2008-09-05 16:13:11 -0400808
809 /* the log root tree is a directory of all the other log roots */
810 struct btrfs_root *log_root_tree;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400811
812 spinlock_t fs_roots_radix_lock;
Chris Mason0f7d52f2007-04-09 10:42:37 -0400813 struct radix_tree_root fs_roots_radix;
Chris Mason1a5bc162007-10-15 16:15:26 -0400814
Josef Bacik0f9dd462008-09-23 13:14:11 -0400815 /* block group cache stuff */
816 spinlock_t block_group_cache_lock;
817 struct rb_root block_group_cache_tree;
818
Yan Zheng11833d62009-09-11 16:11:19 -0400819 struct extent_io_tree freed_extents[2];
820 struct extent_io_tree *pinned_extents;
Chris Mason1a5bc162007-10-15 16:15:26 -0400821
Chris Mason0b86a832008-03-24 15:01:56 -0400822 /* logical->physical extent mapping */
823 struct btrfs_mapping_tree mapping_tree;
824
Chris Mason293ffd52007-03-20 15:57:25 -0400825 u64 generation;
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400826 u64 last_trans_committed;
Chris Mason12fcfd22009-03-24 10:24:20 -0400827
828 /*
829 * this is updated to the current trans every time a full commit
830 * is required instead of the faster short fsync log commits
831 */
832 u64 last_trans_log_full_commit;
Sage Weil9ca9ee02008-08-04 10:41:27 -0400833 u64 open_ioctl_trans;
Chris Masonb6cda9b2007-12-14 15:30:32 -0500834 unsigned long mount_opt;
Chris Masonc59f8952007-12-17 20:14:04 -0500835 u64 max_extent;
Chris Mason6f568d32008-01-29 16:03:38 -0500836 u64 max_inline;
Chris Mason8f662a72008-01-02 10:01:11 -0500837 u64 alloc_start;
Chris Mason79154b12007-03-22 15:59:16 -0400838 struct btrfs_transaction *running_transaction;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400839 wait_queue_head_t transaction_throttle;
Chris Masonf9295742008-07-17 12:54:14 -0400840 wait_queue_head_t transaction_wait;
Chris Mason771ed682008-11-06 22:02:51 -0500841 wait_queue_head_t async_submit_wait;
Chris Masone02119d2008-09-05 16:13:11 -0400842
Chris Mason4b52dff2007-06-26 10:06:50 -0400843 struct btrfs_super_block super_copy;
Chris Masona061fc82008-05-07 11:43:44 -0400844 struct btrfs_super_block super_for_commit;
Chris Mason0b86a832008-03-24 15:01:56 -0400845 struct block_device *__bdev;
Chris Masone20d96d2007-03-22 12:13:20 -0400846 struct super_block *sb;
Chris Masond98237b2007-03-28 13:57:48 -0400847 struct inode *btree_inode;
Chris Mason04160082008-03-26 10:28:07 -0400848 struct backing_dev_info bdi;
Chris Mason79154b12007-03-22 15:59:16 -0400849 struct mutex trans_mutex;
Chris Masone02119d2008-09-05 16:13:11 -0400850 struct mutex tree_log_mutex;
Chris Masona74a4b92008-06-25 16:01:31 -0400851 struct mutex transaction_kthread_mutex;
852 struct mutex cleaner_mutex;
Chris Mason925baed2008-06-25 16:01:30 -0400853 struct mutex chunk_mutex;
Chris Mason7d9eb122008-07-08 14:19:17 -0400854 struct mutex volume_mutex;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400855 /*
856 * this protects the ordered operations list only while we are
857 * processing all of the entries on it. This way we make
858 * sure the commit code doesn't find the list temporarily empty
859 * because another function happens to be doing non-waiting preflush
860 * before jumping into the main commit.
861 */
862 struct mutex ordered_operations_mutex;
Yan Zheng11833d62009-09-11 16:11:19 -0400863 struct rw_semaphore extent_commit_sem;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400864
Yan, Zhengc71bf092009-11-12 09:34:40 +0000865 struct rw_semaphore cleanup_work_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400866
Yan, Zhengc71bf092009-11-12 09:34:40 +0000867 struct rw_semaphore subvol_sem;
Yan, Zheng76dda932009-09-21 16:00:26 -0400868 struct srcu_struct subvol_srcu;
869
Chris Mason8fd17792007-04-19 21:01:03 -0400870 struct list_head trans_list;
Chris Mason19c00dd2007-10-15 16:19:22 -0400871 struct list_head hashers;
Chris Masonfacda1e2007-06-08 18:11:48 -0400872 struct list_head dead_roots;
Yan Zheng11833d62009-09-11 16:11:19 -0400873 struct list_head caching_block_groups;
Chris Masone02119d2008-09-05 16:13:11 -0400874
Yan, Zheng24bbcf02009-11-12 09:36:34 +0000875 spinlock_t delayed_iput_lock;
876 struct list_head delayed_iputs;
877
Chris Masoncb03c742008-05-15 16:15:45 -0400878 atomic_t nr_async_submits;
Chris Mason8c8bee12008-09-29 11:19:10 -0400879 atomic_t async_submit_draining;
Chris Mason0986fe9e2008-08-15 15:34:15 -0400880 atomic_t nr_async_bios;
Chris Mason771ed682008-11-06 22:02:51 -0500881 atomic_t async_delalloc_pages;
Chris Masonce9adaa2008-04-09 16:28:12 -0400882
Chris Mason8b712842008-06-11 16:50:36 -0400883 /*
Chris Mason3eaa2882008-07-24 11:57:52 -0400884 * this is used by the balancing code to wait for all the pending
885 * ordered extents
886 */
887 spinlock_t ordered_extent_lock;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400888
889 /*
890 * all of the data=ordered extents pending writeback
891 * these can span multiple transactions and basically include
892 * every dirty data page that isn't from nodatacow
893 */
Chris Mason3eaa2882008-07-24 11:57:52 -0400894 struct list_head ordered_extents;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400895
896 /*
897 * all of the inodes that have delalloc bytes. It is possible for
898 * this list to be empty even when there is still dirty data=ordered
899 * extents waiting to finish IO.
900 */
Chris Masonea8c2812008-08-04 23:17:27 -0400901 struct list_head delalloc_inodes;
Chris Mason3eaa2882008-07-24 11:57:52 -0400902
903 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -0400904 * special rename and truncate targets that must be on disk before
905 * we're allowed to commit. This is basically the ext3 style
906 * data=ordered list.
907 */
908 struct list_head ordered_operations;
909
910 /*
Chris Mason8b712842008-06-11 16:50:36 -0400911 * there is a pool of worker threads for checksumming during writes
912 * and a pool for checksumming after reads. This is because readers
913 * can run with FS locks held, and the writers may be waiting for
914 * those locks. We don't want ordering in the pending list to cause
915 * deadlocks, and so the two are serviced separately.
Chris Mason1cc127b2008-06-12 14:46:17 -0400916 *
917 * A third pool does submit_bio to avoid deadlocking with the other
918 * two
Chris Mason8b712842008-06-11 16:50:36 -0400919 */
Chris Mason61d92c32009-10-02 19:11:56 -0400920 struct btrfs_workers generic_worker;
Chris Mason8b712842008-06-11 16:50:36 -0400921 struct btrfs_workers workers;
Chris Mason771ed682008-11-06 22:02:51 -0500922 struct btrfs_workers delalloc_workers;
Chris Mason8b712842008-06-11 16:50:36 -0400923 struct btrfs_workers endio_workers;
Chris Masond20f7042008-12-08 16:58:54 -0500924 struct btrfs_workers endio_meta_workers;
Chris Masoncad321a2008-12-17 14:51:42 -0500925 struct btrfs_workers endio_meta_write_workers;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400926 struct btrfs_workers endio_write_workers;
Chris Mason1cc127b2008-06-12 14:46:17 -0400927 struct btrfs_workers submit_workers;
Josef Bacike3ccfa92009-10-07 20:44:34 -0400928 struct btrfs_workers enospc_workers;
Chris Mason247e7432008-07-17 12:53:51 -0400929 /*
930 * fixup workers take dirty pages that didn't properly go through
931 * the cow mechanism and make them safe to write. It happens
932 * for the sys_munmap function call path
933 */
934 struct btrfs_workers fixup_workers;
Chris Masona74a4b92008-06-25 16:01:31 -0400935 struct task_struct *transaction_kthread;
936 struct task_struct *cleaner_kthread;
Chris Mason4543df72008-06-11 21:47:56 -0400937 int thread_pool_size;
Chris Mason8b712842008-06-11 16:50:36 -0400938
Josef Bacik58176a92007-08-29 15:47:34 -0400939 struct kobject super_kobj;
940 struct completion kobj_unregister;
Chris Masone66f7092007-04-20 13:16:02 -0400941 int do_barriers;
Chris Masonfacda1e2007-06-08 18:11:48 -0400942 int closing;
Chris Masone02119d2008-09-05 16:13:11 -0400943 int log_root_recovering;
Chris Mason62e27492007-03-15 12:56:47 -0400944
Yan324ae4d2007-11-16 14:57:08 -0500945 u64 total_pinned;
Chris Masonb9473432009-03-13 11:00:37 -0400946
947 /* protected by the delalloc lock, used to keep from writing
948 * metadata until there is a nice batch
949 */
950 u64 dirty_metadata_bytes;
Chris Mason0b86a832008-03-24 15:01:56 -0400951 struct list_head dirty_cowonly_roots;
952
Chris Mason8a4b83c2008-03-24 15:02:07 -0400953 struct btrfs_fs_devices *fs_devices;
Chris Mason4184ea72009-03-10 12:39:20 -0400954
955 /*
956 * the space_info list is almost entirely read only. It only changes
957 * when we add a new raid type to the FS, and that happens
958 * very rarely. RCU is used to protect it.
959 */
Chris Mason6324fbf2008-03-24 15:01:59 -0400960 struct list_head space_info;
Chris Mason4184ea72009-03-10 12:39:20 -0400961
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400962 struct reloc_control *reloc_ctl;
963
Chris Mason1832a6d2007-12-21 16:27:21 -0500964 spinlock_t delalloc_lock;
Chris Masoncee36a02008-01-15 08:40:48 -0500965 spinlock_t new_trans_lock;
Chris Mason1832a6d2007-12-21 16:27:21 -0500966 u64 delalloc_bytes;
Chris Masonfa9c0d792009-04-03 09:47:43 -0400967
968 /* data_alloc_cluster is only used in ssd mode */
969 struct btrfs_free_cluster data_alloc_cluster;
970
971 /* all metadata allocations go through this cluster */
972 struct btrfs_free_cluster meta_alloc_cluster;
Chris Masond18a2c42008-04-04 15:40:00 -0400973
Yan Zheng31153d82008-07-28 15:32:19 -0400974 spinlock_t ref_cache_lock;
975 u64 total_ref_cache_size;
Yan Zheng31153d82008-07-28 15:32:19 -0400976
Chris Masond18a2c42008-04-04 15:40:00 -0400977 u64 avail_data_alloc_bits;
978 u64 avail_metadata_alloc_bits;
979 u64 avail_system_alloc_bits;
980 u64 data_alloc_profile;
981 u64 metadata_alloc_profile;
982 u64 system_alloc_profile;
Chris Mason788f20e2008-04-28 15:29:42 -0400983
Josef Bacik97e728d2009-04-21 17:40:57 -0400984 unsigned data_chunk_allocations;
985 unsigned metadata_ratio;
986
Chris Mason788f20e2008-04-28 15:29:42 -0400987 void *bdev_holder;
Yan324ae4d2007-11-16 14:57:08 -0500988};
Chris Mason0b86a832008-03-24 15:01:56 -0400989
Chris Mason62e27492007-03-15 12:56:47 -0400990/*
991 * in ram representation of the tree. extent_root is used for all allocations
Chris Masonf2458e12007-04-25 15:52:25 -0400992 * and for the extent tree extent_root root.
Chris Mason62e27492007-03-15 12:56:47 -0400993 */
994struct btrfs_root {
Chris Mason5f39d392007-10-15 16:14:19 -0400995 struct extent_buffer *node;
Chris Mason925baed2008-06-25 16:01:30 -0400996
997 /* the node lock is held while changing the node pointer */
998 spinlock_t node_lock;
999
Chris Mason5f39d392007-10-15 16:14:19 -04001000 struct extent_buffer *commit_root;
Chris Masone02119d2008-09-05 16:13:11 -04001001 struct btrfs_root *log_root;
Zheng Yan1a40e232008-09-26 10:09:34 -04001002 struct btrfs_root *reloc_root;
Yan Zheng31153d82008-07-28 15:32:19 -04001003
Chris Mason62e27492007-03-15 12:56:47 -04001004 struct btrfs_root_item root_item;
1005 struct btrfs_key root_key;
Chris Mason9f5fae22007-03-20 14:38:32 -04001006 struct btrfs_fs_info *fs_info;
Chris Masond0c803c2008-09-11 16:17:57 -04001007 struct extent_io_tree dirty_log_pages;
1008
Josef Bacik58176a92007-08-29 15:47:34 -04001009 struct kobject root_kobj;
1010 struct completion kobj_unregister;
Chris Masona2135012008-06-25 16:01:30 -04001011 struct mutex objectid_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001012
Chris Masone02119d2008-09-05 16:13:11 -04001013 struct mutex log_mutex;
Yan Zheng7237f182009-01-21 12:54:03 -05001014 wait_queue_head_t log_writer_wait;
1015 wait_queue_head_t log_commit_wait[2];
1016 atomic_t log_writers;
1017 atomic_t log_commit[2];
1018 unsigned long log_transid;
Chris Mason257c62e2009-10-13 13:21:08 -04001019 unsigned long last_log_commit;
Yan Zheng7237f182009-01-21 12:54:03 -05001020 unsigned long log_batch;
Josef Bacikff782e02009-10-08 15:30:04 -04001021 pid_t log_start_pid;
1022 bool log_multiple_pids;
Chris Masonea8c2812008-08-04 23:17:27 -04001023
Chris Mason0f7d52f2007-04-09 10:42:37 -04001024 u64 objectid;
1025 u64 last_trans;
Chris Mason5f39d392007-10-15 16:14:19 -04001026
1027 /* data allocations are done in sectorsize units */
1028 u32 sectorsize;
1029
1030 /* node allocations are done in nodesize units */
1031 u32 nodesize;
1032
1033 /* leaf allocations are done in leafsize units */
1034 u32 leafsize;
1035
Chris Mason87ee04e2007-11-30 11:30:34 -05001036 u32 stripesize;
1037
Chris Mason9f5fae22007-03-20 14:38:32 -04001038 u32 type;
Yan, Zheng13a8a7c2009-09-21 15:56:00 -04001039
1040 u64 highest_objectid;
Chris Mason9f3a7422007-08-07 15:52:19 -04001041 int ref_cows;
Chris Mason0b86a832008-03-24 15:01:56 -04001042 int track_dirty;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001043 int in_radix;
Yan, Zhengc71bf092009-11-12 09:34:40 +00001044 int clean_orphans;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04001045
Chris Mason3f157a22008-06-25 16:01:31 -04001046 u64 defrag_trans_start;
Chris Mason6702ed42007-08-07 16:15:09 -04001047 struct btrfs_key defrag_progress;
Chris Mason0ef3e662008-05-24 14:04:53 -04001048 struct btrfs_key defrag_max;
Chris Mason6702ed42007-08-07 16:15:09 -04001049 int defrag_running;
Josef Bacik58176a92007-08-29 15:47:34 -04001050 char *name;
Chris Mason4313b392008-01-03 09:08:48 -05001051 int in_sysfs;
Chris Mason0b86a832008-03-24 15:01:56 -04001052
1053 /* the dirty list is only used by non-reference counted roots */
1054 struct list_head dirty_list;
Josef Bacik7b128762008-07-24 12:17:14 -04001055
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001056 struct list_head root_list;
1057
Yanbcc63ab2008-07-30 16:29:20 -04001058 spinlock_t list_lock;
Josef Bacik7b128762008-07-24 12:17:14 -04001059 struct list_head orphan_list;
Chris Mason3394e162008-11-17 20:42:26 -05001060
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001061 spinlock_t inode_lock;
1062 /* red-black tree that keeps track of in-memory inodes */
1063 struct rb_root inode_tree;
1064
Chris Mason3394e162008-11-17 20:42:26 -05001065 /*
1066 * right now this just gets used so that a root has its own devid
1067 * for stat. It may be used for more later
1068 */
1069 struct super_block anon_super;
Chris Mason62e27492007-03-15 12:56:47 -04001070};
1071
Chris Mason1e1d2702007-03-15 19:03:33 -04001072/*
1073 * inode items have the data typically returned from stat and store other
1074 * info about object characteristics. There is one for every file and dir in
1075 * the FS
1076 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001077#define BTRFS_INODE_ITEM_KEY 1
Chris Mason0660b5a2008-11-17 20:37:39 -05001078#define BTRFS_INODE_REF_KEY 12
1079#define BTRFS_XATTR_ITEM_KEY 24
1080#define BTRFS_ORPHAN_ITEM_KEY 48
Chris Mason9078a3e2007-04-26 16:46:15 -04001081/* reserve 2-15 close to the inode for later flexibility */
Chris Mason1e1d2702007-03-15 19:03:33 -04001082
1083/*
1084 * dir items are the name -> inode pointers in a directory. There is one
1085 * for every name in a directory.
1086 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001087#define BTRFS_DIR_LOG_ITEM_KEY 60
1088#define BTRFS_DIR_LOG_INDEX_KEY 72
1089#define BTRFS_DIR_ITEM_KEY 84
1090#define BTRFS_DIR_INDEX_KEY 96
Chris Mason1e1d2702007-03-15 19:03:33 -04001091/*
Chris Mason9078a3e2007-04-26 16:46:15 -04001092 * extent data is for file data
Chris Mason1e1d2702007-03-15 19:03:33 -04001093 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001094#define BTRFS_EXTENT_DATA_KEY 108
Chris Masond20f7042008-12-08 16:58:54 -05001095
Chris Mason1e1d2702007-03-15 19:03:33 -04001096/*
Chris Masond20f7042008-12-08 16:58:54 -05001097 * extent csums are stored in a separate tree and hold csums for
1098 * an entire extent on disk.
Chris Masonf254e522007-03-29 15:15:27 -04001099 */
Chris Masond20f7042008-12-08 16:58:54 -05001100#define BTRFS_EXTENT_CSUM_KEY 128
Chris Masonf254e522007-03-29 15:15:27 -04001101
1102/*
Wu Fengguangd4a78942009-04-02 16:46:06 -04001103 * root items point to tree roots. They are typically in the root
Chris Mason1e1d2702007-03-15 19:03:33 -04001104 * tree used by the super block to find all the other trees
1105 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001106#define BTRFS_ROOT_ITEM_KEY 132
1107
1108/*
1109 * root backrefs tie subvols and snapshots to the directory entries that
1110 * reference them
1111 */
1112#define BTRFS_ROOT_BACKREF_KEY 144
1113
1114/*
1115 * root refs make a fast index for listing all of the snapshots and
1116 * subvolumes referenced by a given root. They point directly to the
1117 * directory item in the root that references the subvol
1118 */
1119#define BTRFS_ROOT_REF_KEY 156
1120
Chris Mason1e1d2702007-03-15 19:03:33 -04001121/*
1122 * extent items are in the extent map tree. These record which blocks
1123 * are used, and how many references there are to each block
1124 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001125#define BTRFS_EXTENT_ITEM_KEY 168
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001126
1127#define BTRFS_TREE_BLOCK_REF_KEY 176
1128
1129#define BTRFS_EXTENT_DATA_REF_KEY 178
1130
1131#define BTRFS_EXTENT_REF_V0_KEY 180
1132
1133#define BTRFS_SHARED_BLOCK_REF_KEY 182
1134
1135#define BTRFS_SHARED_DATA_REF_KEY 184
Chris Mason9078a3e2007-04-26 16:46:15 -04001136
1137/*
1138 * block groups give us hints into the extent allocation trees. Which
1139 * blocks are free etc etc
1140 */
Chris Mason0660b5a2008-11-17 20:37:39 -05001141#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
Chris Mason9f5fae22007-03-20 14:38:32 -04001142
Chris Mason0660b5a2008-11-17 20:37:39 -05001143#define BTRFS_DEV_EXTENT_KEY 204
1144#define BTRFS_DEV_ITEM_KEY 216
1145#define BTRFS_CHUNK_ITEM_KEY 228
Chris Mason0b86a832008-03-24 15:01:56 -04001146
Chris Mason9f5fae22007-03-20 14:38:32 -04001147/*
Chris Mason1e1d2702007-03-15 19:03:33 -04001148 * string items are for debugging. They just store a short string of
1149 * data in the FS
1150 */
Chris Mason9078a3e2007-04-26 16:46:15 -04001151#define BTRFS_STRING_ITEM_KEY 253
1152
Chris Mason21ad10c2008-01-09 09:23:21 -05001153#define BTRFS_MOUNT_NODATASUM (1 << 0)
1154#define BTRFS_MOUNT_NODATACOW (1 << 1)
1155#define BTRFS_MOUNT_NOBARRIER (1 << 2)
Chris Masone18e4802008-01-18 10:54:22 -05001156#define BTRFS_MOUNT_SSD (1 << 3)
Chris Masondfe25022008-05-13 13:46:40 -04001157#define BTRFS_MOUNT_DEGRADED (1 << 4)
Chris Masonc8b97812008-10-29 14:49:59 -04001158#define BTRFS_MOUNT_COMPRESS (1 << 5)
Sage Weil3a5e1402009-04-02 16:49:40 -04001159#define BTRFS_MOUNT_NOTREELOG (1 << 6)
Sage Weildccae992009-04-02 16:59:01 -04001160#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
Chris Mason451d7582009-06-09 20:28:34 -04001161#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
Chris Masonc2898112009-06-10 09:51:32 -04001162#define BTRFS_MOUNT_NOSSD (1 << 9)
Christoph Hellwige244a0a2009-10-14 09:24:59 -04001163#define BTRFS_MOUNT_DISCARD (1 << 10)
Chris Masonb6cda9b2007-12-14 15:30:32 -05001164
1165#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1166#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1167#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1168 BTRFS_MOUNT_##opt)
Yanb98b6762008-01-08 15:54:37 -05001169/*
1170 * Inode flags
1171 */
Yanfdebe2b2008-01-14 13:26:08 -05001172#define BTRFS_INODE_NODATASUM (1 << 0)
1173#define BTRFS_INODE_NODATACOW (1 << 1)
1174#define BTRFS_INODE_READONLY (1 << 2)
Chris Masonc8b97812008-10-29 14:49:59 -04001175#define BTRFS_INODE_NOCOMPRESS (1 << 3)
Yan Zhengd899e052008-10-30 14:25:28 -04001176#define BTRFS_INODE_PREALLOC (1 << 4)
Christoph Hellwig6cbff002009-04-17 10:37:41 +02001177#define BTRFS_INODE_SYNC (1 << 5)
1178#define BTRFS_INODE_IMMUTABLE (1 << 6)
1179#define BTRFS_INODE_APPEND (1 << 7)
1180#define BTRFS_INODE_NODUMP (1 << 8)
1181#define BTRFS_INODE_NOATIME (1 << 9)
1182#define BTRFS_INODE_DIRSYNC (1 << 10)
1183
1184
Chris Mason5f39d392007-10-15 16:14:19 -04001185/* some macros to generate set/get funcs for the struct fields. This
1186 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1187 * one for u8:
1188 */
1189#define le8_to_cpu(v) (v)
1190#define cpu_to_le8(v) (v)
1191#define __le8 u8
Chris Mason9078a3e2007-04-26 16:46:15 -04001192
Chris Mason5f39d392007-10-15 16:14:19 -04001193#define read_eb_member(eb, ptr, type, member, result) ( \
1194 read_extent_buffer(eb, (char *)(result), \
1195 ((unsigned long)(ptr)) + \
1196 offsetof(type, member), \
1197 sizeof(((type *)0)->member)))
1198
1199#define write_eb_member(eb, ptr, type, member, result) ( \
1200 write_extent_buffer(eb, (char *)(result), \
1201 ((unsigned long)(ptr)) + \
1202 offsetof(type, member), \
1203 sizeof(((type *)0)->member)))
1204
Chris Mason0f827312007-10-15 16:18:56 -04001205#ifndef BTRFS_SETGET_FUNCS
Chris Mason5f39d392007-10-15 16:14:19 -04001206#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
Chris Mason0f827312007-10-15 16:18:56 -04001207u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1208void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1209#endif
Chris Mason9078a3e2007-04-26 16:46:15 -04001210
Chris Mason5f39d392007-10-15 16:14:19 -04001211#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1212static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1213{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001214 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1215 u##bits res = le##bits##_to_cpu(p->member); \
1216 kunmap_atomic(p, KM_USER0); \
Chris Mason810191f2007-10-15 16:18:55 -04001217 return res; \
Chris Mason5f39d392007-10-15 16:14:19 -04001218} \
1219static inline void btrfs_set_##name(struct extent_buffer *eb, \
1220 u##bits val) \
1221{ \
David Millerdf68b8a2008-02-15 10:40:52 -05001222 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1223 p->member = cpu_to_le##bits(val); \
1224 kunmap_atomic(p, KM_USER0); \
Chris Mason9078a3e2007-04-26 16:46:15 -04001225}
Chris Mason1e1d2702007-03-15 19:03:33 -04001226
Chris Mason5f39d392007-10-15 16:14:19 -04001227#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1228static inline u##bits btrfs_##name(type *s) \
1229{ \
1230 return le##bits##_to_cpu(s->member); \
1231} \
1232static inline void btrfs_set_##name(type *s, u##bits val) \
1233{ \
1234 s->member = cpu_to_le##bits(val); \
Chris Mason1e1d2702007-03-15 19:03:33 -04001235}
1236
Chris Mason0b86a832008-03-24 15:01:56 -04001237BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1238BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1239BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1240BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1241BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
Chris Masonc3027eb2008-12-08 16:40:21 -05001242BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1243 start_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001244BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1245BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001246BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1247BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1248BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001249BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001250
Chris Mason8a4b83c2008-03-24 15:02:07 -04001251BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1252BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1253 total_bytes, 64);
1254BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1255 bytes_used, 64);
1256BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1257 io_align, 32);
1258BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1259 io_width, 32);
1260BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1261 sector_size, 32);
1262BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001263BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1264 dev_group, 32);
1265BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1266 seek_speed, 8);
1267BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1268 bandwidth, 8);
Yan Zheng2b820322008-11-17 21:11:30 -05001269BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1270 generation, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001271
Chris Mason0b86a832008-03-24 15:01:56 -04001272static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1273{
1274 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1275}
1276
Yan Zheng2b820322008-11-17 21:11:30 -05001277static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1278{
1279 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1280}
1281
Chris Masone17cade2008-04-15 15:41:47 -04001282BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001283BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1284BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1285BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1286BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1287BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1288BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1289BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001290BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001291BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1292BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1293
Chris Masone17cade2008-04-15 15:41:47 -04001294static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1295{
1296 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1297}
1298
1299BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001300BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1301BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1302 stripe_len, 64);
1303BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1304 io_align, 32);
1305BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1306 io_width, 32);
1307BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1308 sector_size, 32);
1309BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1310BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1311 num_stripes, 16);
Chris Mason321aecc2008-04-16 10:49:51 -04001312BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1313 sub_stripes, 16);
Chris Mason0b86a832008-03-24 15:01:56 -04001314BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1315BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1316
1317static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1318 int nr)
1319{
1320 unsigned long offset = (unsigned long)c;
1321 offset += offsetof(struct btrfs_chunk, stripe);
1322 offset += nr * sizeof(struct btrfs_stripe);
1323 return (struct btrfs_stripe *)offset;
1324}
1325
Chris Masona4437552008-04-18 10:29:38 -04001326static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1327{
1328 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1329}
1330
Chris Mason0b86a832008-03-24 15:01:56 -04001331static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1332 struct btrfs_chunk *c, int nr)
1333{
1334 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1335}
1336
1337static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1338 struct btrfs_chunk *c, int nr,
1339 u64 val)
1340{
1341 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1342}
1343
1344static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1345 struct btrfs_chunk *c, int nr)
1346{
1347 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1348}
1349
1350static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1351 struct btrfs_chunk *c, int nr,
1352 u64 val)
1353{
1354 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1355}
1356
Chris Mason5f39d392007-10-15 16:14:19 -04001357/* struct btrfs_block_group_item */
1358BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1359 used, 64);
1360BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1361 used, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001362BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1363 struct btrfs_block_group_item, chunk_objectid, 64);
Chris Masone17cade2008-04-15 15:41:47 -04001364
1365BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
Chris Mason0b86a832008-03-24 15:01:56 -04001366 struct btrfs_block_group_item, chunk_objectid, 64);
1367BTRFS_SETGET_FUNCS(disk_block_group_flags,
1368 struct btrfs_block_group_item, flags, 64);
1369BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1370 struct btrfs_block_group_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001371
Chris Mason39544012007-12-12 14:38:19 -05001372/* struct btrfs_inode_ref */
1373BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
Josef Bacikaec74772008-07-24 12:12:38 -04001374BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
Chris Mason39544012007-12-12 14:38:19 -05001375
Chris Mason5f39d392007-10-15 16:14:19 -04001376/* struct btrfs_inode_item */
1377BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001378BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001379BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001380BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
Yan Zhenga76a3cd2008-10-09 11:46:29 -04001381BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001382BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1383BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1384BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1385BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1386BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
Chris Mason0b86a832008-03-24 15:01:56 -04001387BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001388BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001389
Chris Mason0b86a832008-03-24 15:01:56 -04001390static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001391btrfs_inode_atime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001392{
Chris Mason5f39d392007-10-15 16:14:19 -04001393 unsigned long ptr = (unsigned long)inode_item;
1394 ptr += offsetof(struct btrfs_inode_item, atime);
Chris Mason0b86a832008-03-24 15:01:56 -04001395 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001396}
1397
Chris Mason0b86a832008-03-24 15:01:56 -04001398static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001399btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001400{
Chris Mason5f39d392007-10-15 16:14:19 -04001401 unsigned long ptr = (unsigned long)inode_item;
1402 ptr += offsetof(struct btrfs_inode_item, mtime);
Chris Mason0b86a832008-03-24 15:01:56 -04001403 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001404}
1405
Chris Mason0b86a832008-03-24 15:01:56 -04001406static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001407btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001408{
Chris Mason5f39d392007-10-15 16:14:19 -04001409 unsigned long ptr = (unsigned long)inode_item;
1410 ptr += offsetof(struct btrfs_inode_item, ctime);
Chris Mason0b86a832008-03-24 15:01:56 -04001411 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001412}
1413
Chris Mason0b86a832008-03-24 15:01:56 -04001414static inline struct btrfs_timespec *
Chris Mason5f39d392007-10-15 16:14:19 -04001415btrfs_inode_otime(struct btrfs_inode_item *inode_item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001416{
Chris Mason5f39d392007-10-15 16:14:19 -04001417 unsigned long ptr = (unsigned long)inode_item;
1418 ptr += offsetof(struct btrfs_inode_item, otime);
Chris Mason0b86a832008-03-24 15:01:56 -04001419 return (struct btrfs_timespec *)ptr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001420}
1421
Chris Mason0b86a832008-03-24 15:01:56 -04001422BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1423BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001424
Chris Mason0b86a832008-03-24 15:01:56 -04001425/* struct btrfs_dev_extent */
Chris Masone17cade2008-04-15 15:41:47 -04001426BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1427 chunk_tree, 64);
1428BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1429 chunk_objectid, 64);
1430BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1431 chunk_offset, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001432BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1433
Chris Masone17cade2008-04-15 15:41:47 -04001434static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1435{
1436 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1437 return (u8 *)((unsigned long)dev + ptr);
1438}
1439
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001440BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1441BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1442 generation, 64);
1443BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001444
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001445BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001446
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001447
1448BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1449
1450static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1451 struct btrfs_tree_block_info *item,
1452 struct btrfs_disk_key *key)
1453{
1454 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1455}
1456
1457static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1458 struct btrfs_tree_block_info *item,
1459 struct btrfs_disk_key *key)
1460{
1461 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1462}
1463
1464BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1465 root, 64);
1466BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1467 objectid, 64);
1468BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1469 offset, 64);
1470BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1471 count, 32);
1472
1473BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1474 count, 32);
1475
1476BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1477 type, 8);
1478BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1479 offset, 64);
1480
1481static inline u32 btrfs_extent_inline_ref_size(int type)
1482{
1483 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1484 type == BTRFS_SHARED_BLOCK_REF_KEY)
1485 return sizeof(struct btrfs_extent_inline_ref);
1486 if (type == BTRFS_SHARED_DATA_REF_KEY)
1487 return sizeof(struct btrfs_shared_data_ref) +
1488 sizeof(struct btrfs_extent_inline_ref);
1489 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1490 return sizeof(struct btrfs_extent_data_ref) +
1491 offsetof(struct btrfs_extent_inline_ref, offset);
1492 BUG();
1493 return 0;
1494}
1495
1496BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1497BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1498 generation, 64);
1499BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1500BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001501
1502/* struct btrfs_node */
1503BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
Chris Mason74493f72007-12-11 09:25:06 -05001504BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001505
1506static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001507{
Chris Mason5f39d392007-10-15 16:14:19 -04001508 unsigned long ptr;
1509 ptr = offsetof(struct btrfs_node, ptrs) +
1510 sizeof(struct btrfs_key_ptr) * nr;
1511 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001512}
1513
Chris Mason5f39d392007-10-15 16:14:19 -04001514static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1515 int nr, u64 val)
Chris Mason31f3c992007-04-30 15:25:45 -04001516{
Chris Mason5f39d392007-10-15 16:14:19 -04001517 unsigned long ptr;
1518 ptr = offsetof(struct btrfs_node, ptrs) +
1519 sizeof(struct btrfs_key_ptr) * nr;
1520 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
Chris Mason31f3c992007-04-30 15:25:45 -04001521}
1522
Chris Mason74493f72007-12-11 09:25:06 -05001523static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1524{
1525 unsigned long ptr;
1526 ptr = offsetof(struct btrfs_node, ptrs) +
1527 sizeof(struct btrfs_key_ptr) * nr;
1528 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1529}
1530
1531static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1532 int nr, u64 val)
1533{
1534 unsigned long ptr;
1535 ptr = offsetof(struct btrfs_node, ptrs) +
1536 sizeof(struct btrfs_key_ptr) * nr;
1537 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1538}
1539
Chris Mason810191f2007-10-15 16:18:55 -04001540static inline unsigned long btrfs_node_key_ptr_offset(int nr)
Chris Mason31f3c992007-04-30 15:25:45 -04001541{
Chris Mason5f39d392007-10-15 16:14:19 -04001542 return offsetof(struct btrfs_node, ptrs) +
1543 sizeof(struct btrfs_key_ptr) * nr;
Chris Mason31f3c992007-04-30 15:25:45 -04001544}
1545
Chris Masone644d022007-11-06 15:09:29 -05001546void btrfs_node_key(struct extent_buffer *eb,
1547 struct btrfs_disk_key *disk_key, int nr);
1548
Chris Mason5f39d392007-10-15 16:14:19 -04001549static inline void btrfs_set_node_key(struct extent_buffer *eb,
1550 struct btrfs_disk_key *disk_key, int nr)
1551{
1552 unsigned long ptr;
1553 ptr = btrfs_node_key_ptr_offset(nr);
1554 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1555 struct btrfs_key_ptr, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001556}
1557
Chris Mason5f39d392007-10-15 16:14:19 -04001558/* struct btrfs_item */
1559BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1560BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1561
1562static inline unsigned long btrfs_item_nr_offset(int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001563{
Chris Mason5f39d392007-10-15 16:14:19 -04001564 return offsetof(struct btrfs_leaf, items) +
1565 sizeof(struct btrfs_item) * nr;
Chris Mason1e1d2702007-03-15 19:03:33 -04001566}
1567
Chris Mason5f39d392007-10-15 16:14:19 -04001568static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1569 int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001570{
Chris Mason5f39d392007-10-15 16:14:19 -04001571 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
Chris Mason1e1d2702007-03-15 19:03:33 -04001572}
1573
Chris Mason5f39d392007-10-15 16:14:19 -04001574static inline u32 btrfs_item_end(struct extent_buffer *eb,
1575 struct btrfs_item *item)
Chris Mason1e1d2702007-03-15 19:03:33 -04001576{
Chris Mason5f39d392007-10-15 16:14:19 -04001577 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
Chris Mason1e1d2702007-03-15 19:03:33 -04001578}
1579
Chris Mason5f39d392007-10-15 16:14:19 -04001580static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001581{
Chris Mason5f39d392007-10-15 16:14:19 -04001582 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001583}
1584
Chris Mason5f39d392007-10-15 16:14:19 -04001585static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001586{
Chris Mason5f39d392007-10-15 16:14:19 -04001587 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001588}
1589
Chris Mason5f39d392007-10-15 16:14:19 -04001590static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001591{
Chris Mason5f39d392007-10-15 16:14:19 -04001592 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
Chris Mason1e1d2702007-03-15 19:03:33 -04001593}
1594
Chris Mason5f39d392007-10-15 16:14:19 -04001595static inline void btrfs_item_key(struct extent_buffer *eb,
1596 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001597{
Chris Mason5f39d392007-10-15 16:14:19 -04001598 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1599 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001600}
1601
Chris Mason5f39d392007-10-15 16:14:19 -04001602static inline void btrfs_set_item_key(struct extent_buffer *eb,
1603 struct btrfs_disk_key *disk_key, int nr)
Chris Mason1e1d2702007-03-15 19:03:33 -04001604{
Chris Mason5f39d392007-10-15 16:14:19 -04001605 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1606 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001607}
1608
Chris Masone02119d2008-09-05 16:13:11 -04001609BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1610
Chris Mason0660b5a2008-11-17 20:37:39 -05001611/*
1612 * struct btrfs_root_ref
1613 */
1614BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1615BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1616BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1617
Chris Mason5f39d392007-10-15 16:14:19 -04001618/* struct btrfs_dir_item */
Josef Bacik5103e942007-11-16 11:45:54 -05001619BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
Chris Mason5f39d392007-10-15 16:14:19 -04001620BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1621BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
Chris Masone02119d2008-09-05 16:13:11 -04001622BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001623
1624static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1625 struct btrfs_dir_item *item,
1626 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001627{
Chris Mason5f39d392007-10-15 16:14:19 -04001628 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001629}
1630
Chris Mason5f39d392007-10-15 16:14:19 -04001631static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1632 struct btrfs_dir_item *item,
1633 struct btrfs_disk_key *key)
Chris Mason1e1d2702007-03-15 19:03:33 -04001634{
Chris Mason5f39d392007-10-15 16:14:19 -04001635 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
Chris Mason1e1d2702007-03-15 19:03:33 -04001636}
1637
Chris Mason5f39d392007-10-15 16:14:19 -04001638/* struct btrfs_disk_key */
1639BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1640 objectid, 64);
1641BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1642BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
Chris Mason1d4f6402007-03-15 15:18:43 -04001643
Chris Masone2fa7222007-03-12 16:22:34 -04001644static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1645 struct btrfs_disk_key *disk)
1646{
1647 cpu->offset = le64_to_cpu(disk->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001648 cpu->type = disk->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001649 cpu->objectid = le64_to_cpu(disk->objectid);
1650}
1651
1652static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1653 struct btrfs_key *cpu)
1654{
1655 disk->offset = cpu_to_le64(cpu->offset);
Chris Mason5f39d392007-10-15 16:14:19 -04001656 disk->type = cpu->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001657 disk->objectid = cpu_to_le64(cpu->objectid);
1658}
1659
Chris Mason5f39d392007-10-15 16:14:19 -04001660static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1661 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001662{
Chris Mason5f39d392007-10-15 16:14:19 -04001663 struct btrfs_disk_key disk_key;
1664 btrfs_node_key(eb, &disk_key, nr);
1665 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001666}
1667
Chris Mason5f39d392007-10-15 16:14:19 -04001668static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1669 struct btrfs_key *key, int nr)
Chris Masone2fa7222007-03-12 16:22:34 -04001670{
Chris Mason5f39d392007-10-15 16:14:19 -04001671 struct btrfs_disk_key disk_key;
1672 btrfs_item_key(eb, &disk_key, nr);
1673 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001674}
1675
Chris Mason5f39d392007-10-15 16:14:19 -04001676static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1677 struct btrfs_dir_item *item,
1678 struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001679{
Chris Mason5f39d392007-10-15 16:14:19 -04001680 struct btrfs_disk_key disk_key;
1681 btrfs_dir_item_key(eb, item, &disk_key);
1682 btrfs_disk_key_to_cpu(key, &disk_key);
Chris Masone2fa7222007-03-12 16:22:34 -04001683}
1684
Chris Mason5f39d392007-10-15 16:14:19 -04001685
1686static inline u8 btrfs_key_type(struct btrfs_key *key)
Chris Masone2fa7222007-03-12 16:22:34 -04001687{
Chris Mason5f39d392007-10-15 16:14:19 -04001688 return key->type;
Chris Masone2fa7222007-03-12 16:22:34 -04001689}
1690
Chris Mason5f39d392007-10-15 16:14:19 -04001691static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
Chris Masone2fa7222007-03-12 16:22:34 -04001692{
Chris Mason5f39d392007-10-15 16:14:19 -04001693 key->type = val;
Chris Masone2fa7222007-03-12 16:22:34 -04001694}
1695
Chris Mason5f39d392007-10-15 16:14:19 -04001696/* struct btrfs_header */
Chris Masondb945352007-10-15 16:15:53 -04001697BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001698BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1699 generation, 64);
1700BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1701BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
Chris Mason63b10fc2008-04-01 11:21:32 -04001702BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001703BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1704
Chris Mason63b10fc2008-04-01 11:21:32 -04001705static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1706{
1707 return (btrfs_header_flags(eb) & flag) == flag;
1708}
1709
1710static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1711{
1712 u64 flags = btrfs_header_flags(eb);
1713 btrfs_set_header_flags(eb, flags | flag);
1714 return (flags & flag) == flag;
1715}
1716
1717static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1718{
1719 u64 flags = btrfs_header_flags(eb);
1720 btrfs_set_header_flags(eb, flags & ~flag);
1721 return (flags & flag) == flag;
1722}
1723
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001724static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1725{
1726 u64 flags = btrfs_header_flags(eb);
1727 return flags >> BTRFS_BACKREF_REV_SHIFT;
1728}
1729
1730static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1731 int rev)
1732{
1733 u64 flags = btrfs_header_flags(eb);
1734 flags &= ~BTRFS_BACKREF_REV_MASK;
1735 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1736 btrfs_set_header_flags(eb, flags);
1737}
1738
Chris Mason5f39d392007-10-15 16:14:19 -04001739static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
Chris Masone2fa7222007-03-12 16:22:34 -04001740{
Chris Mason5f39d392007-10-15 16:14:19 -04001741 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1742 return (u8 *)ptr;
Chris Masone2fa7222007-03-12 16:22:34 -04001743}
1744
Chris Masone17cade2008-04-15 15:41:47 -04001745static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1746{
1747 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1748 return (u8 *)ptr;
1749}
1750
Chris Mason5f39d392007-10-15 16:14:19 -04001751static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001752{
Chris Mason5f39d392007-10-15 16:14:19 -04001753 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1754 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001755}
1756
Chris Mason5f39d392007-10-15 16:14:19 -04001757static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001758{
Chris Mason5f39d392007-10-15 16:14:19 -04001759 unsigned long ptr = offsetof(struct btrfs_header, csum);
1760 return (u8 *)ptr;
Chris Masona429e512007-04-18 16:15:28 -04001761}
1762
Chris Mason5f39d392007-10-15 16:14:19 -04001763static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001764{
Chris Mason5f39d392007-10-15 16:14:19 -04001765 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001766}
1767
Chris Mason5f39d392007-10-15 16:14:19 -04001768static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
Chris Masona429e512007-04-18 16:15:28 -04001769{
Chris Mason5f39d392007-10-15 16:14:19 -04001770 return NULL;
Chris Masona429e512007-04-18 16:15:28 -04001771}
1772
Chris Mason5f39d392007-10-15 16:14:19 -04001773static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001774{
Chris Mason5f39d392007-10-15 16:14:19 -04001775 return NULL;
Chris Mason7518a232007-03-12 12:01:18 -04001776}
1777
Chris Mason5f39d392007-10-15 16:14:19 -04001778static inline int btrfs_is_leaf(struct extent_buffer *eb)
Chris Mason7518a232007-03-12 12:01:18 -04001779{
Chris Masond3977122009-01-05 21:25:51 -05001780 return btrfs_header_level(eb) == 0;
Chris Mason7518a232007-03-12 12:01:18 -04001781}
1782
Chris Mason5f39d392007-10-15 16:14:19 -04001783/* struct btrfs_root_item */
Yan Zheng84234f32008-10-29 14:49:05 -04001784BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1785 generation, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001786BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
Chris Masondb945352007-10-15 16:15:53 -04001787BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1788BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001789
Yan Zheng84234f32008-10-29 14:49:05 -04001790BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1791 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001792BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1793BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
Chris Mason5f39d392007-10-15 16:14:19 -04001794BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1795BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001796BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
Chris Masondb945352007-10-15 16:15:53 -04001797BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1798BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Yan Zheng80ff3852008-10-30 14:20:02 -04001799BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1800 last_snapshot, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001801
1802/* struct btrfs_super_block */
Josef Bacik607d4322008-12-02 07:17:45 -05001803
Chris Masondb945352007-10-15 16:15:53 -04001804BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
Chris Masona061fc82008-05-07 11:43:44 -04001805BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001806BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1807 generation, 64);
1808BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Chris Mason0b86a832008-03-24 15:01:56 -04001809BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1810 struct btrfs_super_block, sys_chunk_array_size, 32);
Yan Zheng84234f32008-10-29 14:49:05 -04001811BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1812 struct btrfs_super_block, chunk_root_generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001813BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1814 root_level, 8);
Chris Mason0b86a832008-03-24 15:01:56 -04001815BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1816 chunk_root, 64);
1817BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
Chris Masone02119d2008-09-05 16:13:11 -04001818 chunk_root_level, 8);
1819BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1820 log_root, 64);
Chris Masonc3027eb2008-12-08 16:40:21 -05001821BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1822 log_root_transid, 64);
Chris Masone02119d2008-09-05 16:13:11 -04001823BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1824 log_root_level, 8);
Chris Masondb945352007-10-15 16:15:53 -04001825BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1826 total_bytes, 64);
1827BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1828 bytes_used, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001829BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1830 sectorsize, 32);
1831BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1832 nodesize, 32);
1833BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1834 leafsize, 32);
Chris Mason87ee04e2007-11-30 11:30:34 -05001835BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1836 stripesize, 32);
Chris Mason5f39d392007-10-15 16:14:19 -04001837BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1838 root_dir_objectid, 64);
Chris Mason8a4b83c2008-03-24 15:02:07 -04001839BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1840 num_devices, 64);
Josef Bacikf2b636e2008-12-02 06:36:08 -05001841BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1842 compat_flags, 64);
1843BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1844 compat_flags, 64);
1845BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1846 incompat_flags, 64);
Josef Bacik607d4322008-12-02 07:17:45 -05001847BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1848 csum_type, 16);
1849
1850static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1851{
1852 int t = btrfs_super_csum_type(s);
1853 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1854 return btrfs_csum_sizes[t];
1855}
Chris Mason5f39d392007-10-15 16:14:19 -04001856
1857static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
Chris Mason7f5c1512007-03-23 15:56:19 -04001858{
Chris Mason5f39d392007-10-15 16:14:19 -04001859 return offsetof(struct btrfs_leaf, items);
Chris Mason7f5c1512007-03-23 15:56:19 -04001860}
1861
Chris Mason5f39d392007-10-15 16:14:19 -04001862/* struct btrfs_file_extent_item */
1863BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
Chris Mason7f5c1512007-03-23 15:56:19 -04001864
Chris Masond3977122009-01-05 21:25:51 -05001865static inline unsigned long
1866btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
Chris Mason236454df2007-04-19 13:37:44 -04001867{
Chris Mason5f39d392007-10-15 16:14:19 -04001868 unsigned long offset = (unsigned long)e;
Chris Masondb945352007-10-15 16:15:53 -04001869 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
Chris Mason5f39d392007-10-15 16:14:19 -04001870 return offset;
Chris Mason236454df2007-04-19 13:37:44 -04001871}
1872
1873static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1874{
Chris Masondb945352007-10-15 16:15:53 -04001875 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
Chris Mason236454df2007-04-19 13:37:44 -04001876}
1877
Chris Masondb945352007-10-15 16:15:53 -04001878BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1879 disk_bytenr, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001880BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1881 generation, 64);
Chris Masondb945352007-10-15 16:15:53 -04001882BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1883 disk_num_bytes, 64);
Chris Mason5f39d392007-10-15 16:14:19 -04001884BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1885 offset, 64);
Chris Masondb945352007-10-15 16:15:53 -04001886BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1887 num_bytes, 64);
Chris Masonc8b97812008-10-29 14:49:59 -04001888BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1889 ram_bytes, 64);
1890BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1891 compression, 8);
1892BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1893 encryption, 8);
1894BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1895 other_encoding, 16);
1896
1897/* this returns the number of file bytes represented by the inline item.
1898 * If an item is compressed, this is the uncompressed size
1899 */
1900static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1901 struct btrfs_file_extent_item *e)
1902{
1903 return btrfs_file_extent_ram_bytes(eb, e);
1904}
1905
1906/*
1907 * this returns the number of bytes used by the item on disk, minus the
1908 * size of any extent headers. If a file is compressed on disk, this is
1909 * the compressed size
1910 */
1911static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1912 struct btrfs_item *e)
1913{
1914 unsigned long offset;
1915 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1916 return btrfs_item_size(eb, e) - offset;
1917}
Chris Mason9f5fae22007-03-20 14:38:32 -04001918
Chris Masone20d96d2007-03-22 12:13:20 -04001919static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1920{
1921 return sb->s_fs_info;
1922}
1923
Josef Bacik58176a92007-08-29 15:47:34 -04001924static inline int btrfs_set_root_name(struct btrfs_root *root,
1925 const char *name, int len)
1926{
1927 /* if we already have a name just free it */
Chris Masond3977122009-01-05 21:25:51 -05001928 kfree(root->name);
Josef Bacik58176a92007-08-29 15:47:34 -04001929
1930 root->name = kmalloc(len+1, GFP_KERNEL);
1931 if (!root->name)
1932 return -ENOMEM;
1933
1934 memcpy(root->name, name, len);
Chris Masond3977122009-01-05 21:25:51 -05001935 root->name[len] = '\0';
Josef Bacik58176a92007-08-29 15:47:34 -04001936
1937 return 0;
1938}
1939
Chris Masond3977122009-01-05 21:25:51 -05001940static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1941{
Chris Masondb945352007-10-15 16:15:53 -04001942 if (level == 0)
1943 return root->leafsize;
1944 return root->nodesize;
1945}
1946
Chris Mason4beb1b82007-03-14 10:31:29 -04001947/* helper function to cast into the data area of the leaf. */
1948#define btrfs_item_ptr(leaf, slot, type) \
Chris Mason123abc82007-03-14 14:14:43 -04001949 ((type *)(btrfs_leaf_data(leaf) + \
Chris Mason5f39d392007-10-15 16:14:19 -04001950 btrfs_item_offset_nr(leaf, slot)))
1951
1952#define btrfs_item_ptr_offset(leaf, slot) \
1953 ((unsigned long)(btrfs_leaf_data(leaf) + \
1954 btrfs_item_offset_nr(leaf, slot)))
Chris Mason4beb1b82007-03-14 10:31:29 -04001955
Chris Mason2b1f55b2008-09-24 11:48:04 -04001956static inline struct dentry *fdentry(struct file *file)
1957{
Chris Mason6da6aba2007-12-18 16:15:09 -05001958 return file->f_path.dentry;
Chris Mason6da6aba2007-12-18 16:15:09 -05001959}
1960
Chris Masonb18c6682007-04-17 13:26:50 -04001961/* extent-tree.c */
Chris Masonfa9c0d792009-04-03 09:47:43 -04001962void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Chris Mason56bec292009-03-13 10:10:06 -04001963int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root, unsigned long count);
Zheng Yan31840ae2008-09-23 13:14:14 -04001965int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
Yan Zheng11833d62009-09-11 16:11:19 -04001966int btrfs_pin_extent(struct btrfs_root *root,
1967 u64 bytenr, u64 num, int reserved);
Chris Masone02119d2008-09-05 16:13:11 -04001968int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1969 struct btrfs_root *root, struct extent_buffer *leaf);
Yan Zheng80ff3852008-10-30 14:20:02 -04001970int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001971 struct btrfs_root *root,
1972 u64 objectid, u64 offset, u64 bytenr);
Chris Masond1310b22008-01-24 16:13:08 -05001973int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
Chris Masond3977122009-01-05 21:25:51 -05001974struct btrfs_block_group_cache *btrfs_lookup_block_group(
1975 struct btrfs_fs_info *info,
1976 u64 bytenr);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001977void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
Yan Zhengd2fb3432008-12-11 16:30:39 -05001978u64 btrfs_find_block_group(struct btrfs_root *root,
1979 u64 search_start, u64 search_hint, int owner);
Chris Mason5f39d392007-10-15 16:14:19 -04001980struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001981 struct btrfs_root *root, u32 blocksize,
1982 u64 parent, u64 root_objectid,
1983 struct btrfs_disk_key *key, int level,
1984 u64 hint, u64 empty_size);
Yan, Zheng86b9f2e2009-11-12 09:36:50 +00001985int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
1986 struct btrfs_root *root,
1987 u64 bytenr, u32 blocksize,
1988 u64 parent, u64 root_objectid, int level);
Chris Mason65b51a02008-08-01 15:11:20 -04001989struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1990 struct btrfs_root *root,
Chris Mason4008c042009-02-12 14:09:45 -05001991 u64 bytenr, u32 blocksize,
1992 int level);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04001993int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
1994 struct btrfs_root *root,
1995 u64 root_objectid, u64 owner,
1996 u64 offset, struct btrfs_key *ins);
1997int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root,
1999 u64 root_objectid, u64 owner, u64 offset,
2000 struct btrfs_key *ins);
Chris Masone6dcd2d2008-07-17 12:53:50 -04002001int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2002 struct btrfs_root *root,
2003 u64 num_bytes, u64 min_alloc_size,
2004 u64 empty_size, u64 hint_byte,
2005 u64 search_end, struct btrfs_key *ins,
2006 u64 data);
Chris Masone089f052007-03-16 16:20:31 -04002007int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002008 struct extent_buffer *buf, int full_backref);
2009int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2010 struct extent_buffer *buf, int full_backref);
2011int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2012 struct btrfs_root *root,
2013 u64 bytenr, u64 num_bytes, u64 flags,
2014 int is_data);
Zheng Yan31840ae2008-09-23 13:14:14 -04002015int btrfs_free_extent(struct btrfs_trans_handle *trans,
2016 struct btrfs_root *root,
2017 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002018 u64 root_objectid, u64 owner, u64 offset);
2019
Chris Mason65b51a02008-08-01 15:11:20 -04002020int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
Yan Zheng11833d62009-09-11 16:11:19 -04002021int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2022 struct btrfs_root *root);
Chris Masonccd467d2007-06-28 15:57:36 -04002023int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
Yan Zheng11833d62009-09-11 16:11:19 -04002024 struct btrfs_root *root);
Chris Masonb18c6682007-04-17 13:26:50 -04002025int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Zheng Yan31840ae2008-09-23 13:14:14 -04002026 struct btrfs_root *root,
2027 u64 bytenr, u64 num_bytes, u64 parent,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002028 u64 root_objectid, u64 owner, u64 offset);
2029
Chris Mason9078a3e2007-04-26 16:46:15 -04002030int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2031 struct btrfs_root *root);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002032int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
Chris Mason9078a3e2007-04-26 16:46:15 -04002033int btrfs_free_block_groups(struct btrfs_fs_info *info);
2034int btrfs_read_block_groups(struct btrfs_root *root);
Josef Bacikba1bf482009-09-11 16:11:19 -04002035int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
Chris Mason0b86a832008-03-24 15:01:56 -04002036int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2037 struct btrfs_root *root, u64 bytes_used,
Chris Masone17cade2008-04-15 15:41:47 -04002038 u64 type, u64 chunk_objectid, u64 chunk_offset,
Chris Mason0b86a832008-03-24 15:01:56 -04002039 u64 size);
Zheng Yan1a40e232008-09-26 10:09:34 -04002040int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2041 struct btrfs_root *root, u64 group_start);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002042int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
2043 struct btrfs_block_group_cache *group);
2044
Yan Zheng2b820322008-11-17 21:11:30 -05002045u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
Josef Bacik6a632092009-02-20 11:00:09 -05002046void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
Chris Mason4184ea72009-03-10 12:39:20 -04002047void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2048
Josef Bacik9ed74f22009-09-11 16:12:44 -04002049int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items);
2050int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
2051int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
2052 struct inode *inode, int num_items);
2053int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
2054 struct inode *inode, int num_items);
Josef Bacik6a632092009-02-20 11:00:09 -05002055int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
2056 u64 bytes);
2057void btrfs_free_reserved_data_space(struct btrfs_root *root,
2058 struct inode *inode, u64 bytes);
2059void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
2060 u64 bytes);
2061void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
2062 u64 bytes);
Chris Masondee26a92007-03-26 16:00:06 -04002063/* ctree.c */
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002064int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2065 int level, int *slot);
2066int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
Chris Mason0b86a832008-03-24 15:01:56 -04002067int btrfs_previous_item(struct btrfs_root *root,
2068 struct btrfs_path *path, u64 min_objectid,
2069 int type);
Zheng Yan31840ae2008-09-23 13:14:14 -04002070int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2071 struct btrfs_root *root, struct btrfs_path *path,
2072 struct btrfs_key *new_key);
Chris Mason925baed2008-06-25 16:01:30 -04002073struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2074struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
Chris Masone7a84562008-06-25 16:01:31 -04002075int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
Chris Mason3f157a22008-06-25 16:01:31 -04002076 struct btrfs_key *key, int lowest_level,
2077 int cache_only, u64 min_trans);
2078int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
Chris Masone02119d2008-09-05 16:13:11 -04002079 struct btrfs_key *max_key,
Chris Mason3f157a22008-06-25 16:01:31 -04002080 struct btrfs_path *path, int cache_only,
2081 u64 min_trans);
Chris Mason5f39d392007-10-15 16:14:19 -04002082int btrfs_cow_block(struct btrfs_trans_handle *trans,
2083 struct btrfs_root *root, struct extent_buffer *buf,
2084 struct extent_buffer *parent, int parent_slot,
Chris Mason9fa8cfe2009-03-13 10:24:59 -04002085 struct extent_buffer **cow_ret);
Chris Masonbe20aa92007-12-17 20:14:01 -05002086int btrfs_copy_root(struct btrfs_trans_handle *trans,
2087 struct btrfs_root *root,
2088 struct extent_buffer *buf,
2089 struct extent_buffer **cow_ret, u64 new_root_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002090int btrfs_block_can_be_shared(struct btrfs_root *root,
2091 struct extent_buffer *buf);
Chris Mason6567e832007-04-16 09:22:45 -04002092int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2093 *root, struct btrfs_path *path, u32 data_size);
Chris Masonb18c6682007-04-17 13:26:50 -04002094int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2095 struct btrfs_root *root,
2096 struct btrfs_path *path,
Chris Mason179e29e2007-11-01 11:28:41 -04002097 u32 new_size, int from_end);
Chris Mason459931e2008-12-10 09:10:46 -05002098int btrfs_split_item(struct btrfs_trans_handle *trans,
2099 struct btrfs_root *root,
2100 struct btrfs_path *path,
2101 struct btrfs_key *new_key,
2102 unsigned long split_offset);
Yan, Zhengad48fd752009-11-12 09:33:58 +00002103int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2104 struct btrfs_root *root,
2105 struct btrfs_path *path,
2106 struct btrfs_key *new_key);
Chris Masone089f052007-03-16 16:20:31 -04002107int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2108 *root, struct btrfs_key *key, struct btrfs_path *p, int
2109 ins_len, int cow);
Chris Mason6702ed42007-08-07 16:15:09 -04002110int btrfs_realloc_node(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -04002111 struct btrfs_root *root, struct extent_buffer *parent,
Chris Masona6b6e752007-10-15 16:22:39 -04002112 int start_slot, int cache_only, u64 *last_ret,
2113 struct btrfs_key *progress);
Chris Mason234b63a2007-03-13 10:46:10 -04002114void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
Chris Mason2c90e5d2007-04-02 10:50:19 -04002115struct btrfs_path *btrfs_alloc_path(void);
2116void btrfs_free_path(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002117void btrfs_set_path_blocking(struct btrfs_path *p);
Chris Masonb4ce94d2009-02-04 09:25:08 -05002118void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2119
Chris Mason85e21ba2008-01-29 15:11:36 -05002120int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2121 struct btrfs_path *path, int slot, int nr);
Chris Mason85e21ba2008-01-29 15:11:36 -05002122static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2123 struct btrfs_root *root,
2124 struct btrfs_path *path)
2125{
2126 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2127}
2128
Chris Masone089f052007-03-16 16:20:31 -04002129int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2130 *root, struct btrfs_key *key, void *data, u32 data_size);
Josef Bacikf3465ca2008-11-12 14:19:50 -05002131int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2132 struct btrfs_root *root,
2133 struct btrfs_path *path,
2134 struct btrfs_key *cpu_key, u32 *data_size,
2135 int nr);
Chris Mason9c583092008-01-29 15:15:18 -05002136int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2137 struct btrfs_root *root,
2138 struct btrfs_path *path,
2139 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2140
2141static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2142 struct btrfs_root *root,
2143 struct btrfs_path *path,
2144 struct btrfs_key *key,
2145 u32 data_size)
2146{
2147 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2148}
2149
Chris Mason234b63a2007-03-13 10:46:10 -04002150int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason7bb86312007-12-11 09:25:06 -05002151int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
Chris Mason5f39d392007-10-15 16:14:19 -04002152int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
Yan Zheng2c47e6052009-06-27 21:07:35 -04002153int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref);
Yan Zhengf82d02d2008-10-29 14:49:05 -04002154int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2155 struct btrfs_root *root,
2156 struct extent_buffer *node,
2157 struct extent_buffer *parent);
Chris Masondee26a92007-03-26 16:00:06 -04002158/* root-item.c */
Chris Masonea9e8b12008-11-17 21:14:24 -05002159int btrfs_find_root_ref(struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002160 struct btrfs_path *path,
2161 u64 root_id, u64 ref_id);
Chris Mason0660b5a2008-11-17 20:37:39 -05002162int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2163 struct btrfs_root *tree_root,
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002164 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2165 const char *name, int name_len);
2166int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2167 struct btrfs_root *tree_root,
2168 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
Chris Mason0660b5a2008-11-17 20:37:39 -05002169 const char *name, int name_len);
Chris Masone089f052007-03-16 16:20:31 -04002170int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2171 struct btrfs_key *key);
2172int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2173 *root, struct btrfs_key *key, struct btrfs_root_item
2174 *item);
2175int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2176 *root, struct btrfs_key *key, struct btrfs_root_item
2177 *item);
2178int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2179 btrfs_root_item *item, struct btrfs_key *key);
Chris Masonbf4ef672008-05-08 13:26:18 -04002180int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2181 u64 *found_objectid);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002182int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
Yan, Zheng76dda932009-09-21 16:00:26 -04002183int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002184int btrfs_set_root_node(struct btrfs_root_item *item,
2185 struct extent_buffer *node);
Chris Masondee26a92007-03-26 16:00:06 -04002186/* dir-item.c */
Chris Masond3977122009-01-05 21:25:51 -05002187int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2188 struct btrfs_root *root, const char *name,
2189 int name_len, u64 dir,
Josef Bacikaec74772008-07-24 12:12:38 -04002190 struct btrfs_key *location, u8 type, u64 index);
Chris Mason7e381802007-04-19 15:36:27 -04002191struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2192 struct btrfs_root *root,
2193 struct btrfs_path *path, u64 dir,
2194 const char *name, int name_len,
2195 int mod);
2196struct btrfs_dir_item *
2197btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2198 struct btrfs_root *root,
2199 struct btrfs_path *path, u64 dir,
2200 u64 objectid, const char *name, int name_len,
2201 int mod);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002202struct btrfs_dir_item *
2203btrfs_search_dir_index_item(struct btrfs_root *root,
2204 struct btrfs_path *path, u64 dirid,
2205 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002206struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2207 struct btrfs_path *path,
Chris Mason7f5c1512007-03-23 15:56:19 -04002208 const char *name, int name_len);
Chris Mason7e381802007-04-19 15:36:27 -04002209int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root,
2211 struct btrfs_path *path,
2212 struct btrfs_dir_item *di);
Josef Bacik5103e942007-11-16 11:45:54 -05002213int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002214 struct btrfs_root *root,
2215 struct btrfs_path *path, u64 objectid,
2216 const char *name, u16 name_len,
2217 const void *data, u16 data_len);
Josef Bacik5103e942007-11-16 11:45:54 -05002218struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2219 struct btrfs_root *root,
2220 struct btrfs_path *path, u64 dir,
2221 const char *name, u16 name_len,
2222 int mod);
Josef Bacik7b128762008-07-24 12:17:14 -04002223
2224/* orphan.c */
2225int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2226 struct btrfs_root *root, u64 offset);
2227int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2228 struct btrfs_root *root, u64 offset);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002229int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
Josef Bacik7b128762008-07-24 12:17:14 -04002230
Chris Masondee26a92007-03-26 16:00:06 -04002231/* inode-map.c */
Chris Mason9f5fae22007-03-20 14:38:32 -04002232int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2233 struct btrfs_root *fs_root,
2234 u64 dirid, u64 *objectid);
Chris Mason5be6f7f2007-04-05 13:35:25 -04002235int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2236
Chris Masondee26a92007-03-26 16:00:06 -04002237/* inode-item.c */
Chris Mason39544012007-12-12 14:38:19 -05002238int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2239 struct btrfs_root *root,
2240 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002241 u64 inode_objectid, u64 ref_objectid, u64 index);
Chris Mason39544012007-12-12 14:38:19 -05002242int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2243 struct btrfs_root *root,
2244 const char *name, int name_len,
Josef Bacikaec74772008-07-24 12:12:38 -04002245 u64 inode_objectid, u64 ref_objectid, u64 *index);
Chris Mason5f39d392007-10-15 16:14:19 -04002246int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2247 struct btrfs_root *root,
2248 struct btrfs_path *path, u64 objectid);
Chris Mason293ffd52007-03-20 15:57:25 -04002249int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
Chris Masond6e4a422007-04-06 15:37:36 -04002250 *root, struct btrfs_path *path,
2251 struct btrfs_key *location, int mod);
Chris Masondee26a92007-03-26 16:00:06 -04002252
2253/* file-item.c */
Chris Mason459931e2008-12-10 09:10:46 -05002254int btrfs_del_csums(struct btrfs_trans_handle *trans,
2255 struct btrfs_root *root, u64 bytenr, u64 len);
Chris Mason61b49442008-07-31 15:42:53 -04002256int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002257 struct bio *bio, u32 *dst);
Chris Masonb18c6682007-04-17 13:26:50 -04002258int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
Chris Masonc8b97812008-10-29 14:49:59 -04002259 struct btrfs_root *root,
2260 u64 objectid, u64 pos,
2261 u64 disk_offset, u64 disk_num_bytes,
2262 u64 num_bytes, u64 offset, u64 ram_bytes,
2263 u8 compression, u8 encryption, u16 other_encoding);
Chris Masondee26a92007-03-26 16:00:06 -04002264int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2265 struct btrfs_root *root,
2266 struct btrfs_path *path, u64 objectid,
Chris Masondb945352007-10-15 16:15:53 -04002267 u64 bytenr, int mod);
Chris Mason065631f2008-02-20 12:07:25 -05002268int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
Chris Masond20f7042008-12-08 16:58:54 -05002269 struct btrfs_root *root,
Chris Masone6dcd2d2008-07-17 12:53:50 -04002270 struct btrfs_ordered_sum *sums);
Chris Mason3edf7d32008-07-18 06:17:13 -04002271int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
Chris Masond20f7042008-12-08 16:58:54 -05002272 struct bio *bio, u64 file_start, int contig);
Chris Masonc8b97812008-10-29 14:49:59 -04002273int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2274 u64 start, unsigned long len);
Chris Masonb18c6682007-04-17 13:26:50 -04002275struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2276 struct btrfs_root *root,
2277 struct btrfs_path *path,
Chris Masond20f7042008-12-08 16:58:54 -05002278 u64 bytenr, int cow);
Chris Mason1de037a2007-05-29 15:17:08 -04002279int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2280 struct btrfs_root *root, struct btrfs_path *path,
2281 u64 isize);
Yan Zheng17d217f2008-12-12 10:03:38 -05002282int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2283 u64 end, struct list_head *list);
Chris Mason39279cc2007-06-12 06:35:45 -04002284/* inode.c */
Chris Mason4881ee52008-07-24 09:51:08 -04002285
2286/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
Eric Sandeen5036f532008-08-07 11:19:42 -04002287#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
Chris Mason4881ee52008-07-24 09:51:08 -04002288#define ClearPageChecked ClearPageFsMisc
2289#define SetPageChecked SetPageFsMisc
2290#define PageChecked PageFsMisc
2291#endif
2292
Chris Mason3de45862008-11-17 21:02:50 -05002293struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2294int btrfs_set_inode_index(struct inode *dir, u64 *index);
Chris Masone02119d2008-09-05 16:13:11 -04002295int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2296 struct btrfs_root *root,
2297 struct inode *dir, struct inode *inode,
2298 const char *name, int name_len);
2299int btrfs_add_link(struct btrfs_trans_handle *trans,
2300 struct inode *parent_inode, struct inode *inode,
2301 const char *name, int name_len, int add_backref, u64 index);
Yan, Zheng4df27c4d2009-09-21 15:56:00 -04002302int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2303 struct btrfs_root *root,
2304 struct inode *dir, u64 objectid,
2305 const char *name, int name_len);
Chris Masone02119d2008-09-05 16:13:11 -04002306int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2307 struct btrfs_root *root,
2308 struct inode *inode, u64 new_size,
2309 u32 min_type);
2310
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002311int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
Chris Masonea8c2812008-08-04 23:17:27 -04002312int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
Chris Masonf4219502008-07-22 11:18:09 -04002313int btrfs_writepages(struct address_space *mapping,
2314 struct writeback_control *wbc);
Yan Zhengd2fb3432008-12-11 16:30:39 -05002315int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
Yan, Zheng76dda932009-09-21 16:00:26 -04002316 struct btrfs_root *new_root,
Yan Zhengd2fb3432008-12-11 16:30:39 -05002317 u64 new_dirid, u64 alloc_hint);
Chris Mason239b14b2008-03-24 15:02:07 -04002318int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -04002319 size_t size, struct bio *bio, unsigned long bio_flags);
Chris Mason239b14b2008-03-24 15:02:07 -04002320
Chris Masonedbd8d42007-12-21 16:27:24 -05002321unsigned long btrfs_force_ra(struct address_space *mapping,
2322 struct file_ra_state *ra, struct file *file,
2323 pgoff_t offset, pgoff_t last_index);
Nick Pigginc2ec1752009-03-31 15:23:21 -07002324int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
Chris Mason9ebefb182007-06-15 13:50:00 -04002325int btrfs_readpage(struct file *file, struct page *page);
Chris Mason39279cc2007-06-12 06:35:45 -04002326void btrfs_delete_inode(struct inode *inode);
Chris Mason2da98f02008-01-16 11:44:43 -05002327void btrfs_put_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04002328int btrfs_write_inode(struct inode *inode, int wait);
2329void btrfs_dirty_inode(struct inode *inode);
2330struct inode *btrfs_alloc_inode(struct super_block *sb);
2331void btrfs_destroy_inode(struct inode *inode);
Yan, Zheng76dda932009-09-21 16:00:26 -04002332void btrfs_drop_inode(struct inode *inode);
Chris Mason39279cc2007-06-12 06:35:45 -04002333int btrfs_init_cachep(void);
2334void btrfs_destroy_cachep(void);
Sage Weil6bf13c02008-06-10 10:07:39 -04002335long btrfs_ioctl_trans_end(struct file *file);
Balaji Rao1a54ef82008-07-21 02:01:04 +05302336struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002337 struct btrfs_root *root);
Chris Mason39279cc2007-06-12 06:35:45 -04002338int btrfs_commit_write(struct file *file, struct page *page,
2339 unsigned from, unsigned to);
Chris Masona52d9a82007-08-27 16:49:44 -04002340struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2341 size_t page_offset, u64 start, u64 end,
2342 int create);
2343int btrfs_update_inode(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root,
2345 struct inode *inode);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002346int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2347int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2348void btrfs_orphan_cleanup(struct btrfs_root *root);
Yan Zheng9036c102008-10-30 14:19:41 -04002349int btrfs_cont_expand(struct inode *inode, loff_t size);
Yan, Zheng76dda932009-09-21 16:00:26 -04002350int btrfs_invalidate_inodes(struct btrfs_root *root);
Yan, Zheng24bbcf02009-11-12 09:36:34 +00002351void btrfs_add_delayed_iput(struct inode *inode);
2352void btrfs_run_delayed_iputs(struct btrfs_root *root);
Alexey Dobriyan82d339d2009-10-09 09:54:36 -04002353extern const struct dentry_operations btrfs_dentry_operations;
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002354
2355/* ioctl.c */
2356long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Christoph Hellwig6cbff002009-04-17 10:37:41 +02002357void btrfs_update_iflags(struct inode *inode);
2358void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
Christoph Hellwigf46b5a62008-06-11 21:53:53 -04002359
Chris Mason39279cc2007-06-12 06:35:45 -04002360/* file.c */
Chris Masone02119d2008-09-05 16:13:11 -04002361int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
Zheng Yan5b21f2e2008-09-26 10:05:38 -04002362int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2363 int skip_pinned);
Chris Mason5f564062008-01-22 16:47:59 -05002364int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
Alexey Dobriyan828c0952009-10-01 15:43:56 -07002365extern const struct file_operations btrfs_file_operations;
Yan, Zheng920bbbf2009-11-12 09:34:08 +00002366int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2367 u64 start, u64 end, u64 *hint_byte, int drop_cache);
Yan Zhengd899e052008-10-30 14:25:28 -04002368int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
Yan Zhengd899e052008-10-30 14:25:28 -04002369 struct inode *inode, u64 start, u64 end);
Sage Weil6bf13c02008-06-10 10:07:39 -04002370int btrfs_release_file(struct inode *inode, struct file *file);
2371
Chris Mason6702ed42007-08-07 16:15:09 -04002372/* tree-defrag.c */
2373int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2374 struct btrfs_root *root, int cache_only);
Josef Bacik58176a92007-08-29 15:47:34 -04002375
2376/* sysfs.c */
2377int btrfs_init_sysfs(void);
2378void btrfs_exit_sysfs(void);
2379int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2380int btrfs_sysfs_add_root(struct btrfs_root *root);
2381void btrfs_sysfs_del_root(struct btrfs_root *root);
2382void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2383
Josef Bacik5103e942007-11-16 11:45:54 -05002384/* xattr.c */
2385ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
Josef Bacik6099afe2008-07-24 12:16:03 -04002386
Chris Masonedbd8d42007-12-21 16:27:24 -05002387/* super.c */
2388u64 btrfs_parse_size(char *str);
Christoph Hellwigedf24ab2008-06-10 10:40:29 -04002389int btrfs_parse_options(struct btrfs_root *root, char *options);
Sage Weil6bf13c02008-06-10 10:07:39 -04002390int btrfs_sync_fs(struct super_block *sb, int wait);
Josef Bacik33268ea2008-07-24 12:16:36 -04002391
2392/* acl.c */
Chris Mason0eda2942009-10-13 13:50:18 -04002393#ifdef CONFIG_BTRFS_FS_POSIX_ACL
Josef Bacik33268ea2008-07-24 12:16:36 -04002394int btrfs_check_acl(struct inode *inode, int mask);
Al Viro7df336e2009-06-10 11:36:43 -04002395#else
2396#define btrfs_check_acl NULL
2397#endif
Yan, Zhengf34f57a2009-11-12 09:35:27 +00002398int btrfs_init_acl(struct btrfs_trans_handle *trans,
2399 struct inode *inode, struct inode *dir);
Josef Bacik33268ea2008-07-24 12:16:36 -04002400int btrfs_acl_chmod(struct inode *inode);
Josef Bacik0f9dd462008-09-23 13:14:11 -04002401
Yan Zheng5d4f98a2009-06-10 10:45:14 -04002402/* relocation.c */
2403int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2404int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2405 struct btrfs_root *root);
2406int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2407 struct btrfs_root *root);
2408int btrfs_recover_relocation(struct btrfs_root *root);
2409int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
Chris Masoneb60cea2007-02-02 09:18:22 -05002410#endif