2 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
21 #include <linux/ioctl.h>
23 #define BTRFS_IOCTL_MAGIC 0x94
24 #define BTRFS_VOL_NAME_MAX 255
26 /* this should be 4k */
27 #define BTRFS_PATH_NAME_MAX 4087
28 struct btrfs_ioctl_vol_args
{
30 char name
[BTRFS_PATH_NAME_MAX
+ 1];
33 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
35 #define BTRFS_SUBVOL_NAME_MAX 4039
36 struct btrfs_ioctl_vol_args_v2
{
41 char name
[BTRFS_SUBVOL_NAME_MAX
+ 1];
44 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
45 struct btrfs_ioctl_ino_lookup_args
{
48 char name
[BTRFS_INO_LOOKUP_PATH_MAX
];
51 struct btrfs_ioctl_search_key
{
52 /* which root are we searching. 0 is the tree of tree roots */
55 /* keys returned will be >= min and <= max */
59 /* keys returned will be >= min and <= max */
63 /* max and min transids to search for */
67 /* keys returned will be >= min and <= max */
72 * how many items did userland ask for, and how many are we
77 /* align to 64 bits */
80 /* some extra for later */
87 struct btrfs_ioctl_search_header
{
95 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
97 * the buf is an array of search headers where
98 * each header is followed by the actual item
99 * the type field is expanded to 32 bits for alignment
101 struct btrfs_ioctl_search_args
{
102 struct btrfs_ioctl_search_key key
;
103 char buf
[BTRFS_SEARCH_ARGS_BUFSIZE
];
106 struct btrfs_ioctl_clone_range_args
{
108 __u64 src_offset
, src_length
;
112 /* flags for the defrag range ioctl */
113 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
114 #define BTRFS_DEFRAG_RANGE_START_IO 2
116 struct btrfs_ioctl_defrag_range_args
{
117 /* start of the defrag operation */
120 /* number of bytes to defrag, use (u64)-1 to say all */
124 * flags for the operation, which can include turning
125 * on compression for this one defrag
130 * any extent bigger than this will be considered
131 * already defragged. Use 0 to take the kernel default
132 * Use 1 to say every single extent must be rewritten
137 * which compression method to use if turning on compression
138 * for this defrag operation. If unspecified, zlib will
143 /* spare for later */
147 struct btrfs_ioctl_space_info
{
153 struct btrfs_ioctl_space_args
{
156 struct btrfs_ioctl_space_info spaces
[0];
159 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
160 struct btrfs_ioctl_vol_args)
161 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
162 struct btrfs_ioctl_vol_args)
163 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
164 struct btrfs_ioctl_vol_args)
165 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
166 struct btrfs_ioctl_vol_args)
167 /* trans start and trans end are dangerous, and only for
168 * use by applications that know how to avoid the
169 * resulting deadlocks
171 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
172 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
173 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
175 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
176 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
177 struct btrfs_ioctl_vol_args)
178 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
179 struct btrfs_ioctl_vol_args)
180 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
181 struct btrfs_ioctl_vol_args)
183 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
184 struct btrfs_ioctl_clone_range_args)
186 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
187 struct btrfs_ioctl_vol_args)
188 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
189 struct btrfs_ioctl_vol_args)
190 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
191 struct btrfs_ioctl_defrag_range_args)
192 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
193 struct btrfs_ioctl_search_args)
194 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
195 struct btrfs_ioctl_ino_lookup_args)
196 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
197 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
198 struct btrfs_ioctl_space_args)
199 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
200 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
201 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
202 struct btrfs_ioctl_vol_args_v2)