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.
22 #if defined(__linux__)
23 #include <linux/ioctl.h>
24 #elif defined(__FreeBSD__)
25 #include <sys/ioctl.h>
28 #define BTRFS_IOCTL_MAGIC 0x94
29 #define BTRFS_VOL_NAME_MAX 255
31 /* this should be 4k */
32 #define BTRFS_PATH_NAME_MAX 4087
33 struct btrfs_ioctl_vol_args {
35 char name[BTRFS_PATH_NAME_MAX + 1];
38 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
40 #define BTRFS_SUBVOL_NAME_MAX 4039
41 struct btrfs_ioctl_vol_args_v2 {
46 char name[BTRFS_SUBVOL_NAME_MAX + 1];
49 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
50 struct btrfs_ioctl_ino_lookup_args {
53 char name[BTRFS_INO_LOOKUP_PATH_MAX];
56 struct btrfs_ioctl_search_key {
57 /* which root are we searching. 0 is the tree of tree roots */
60 /* keys returned will be >= min and <= max */
64 /* keys returned will be >= min and <= max */
68 /* max and min transids to search for */
72 /* keys returned will be >= min and <= max */
77 * how many items did userland ask for, and how many are we
82 /* align to 64 bits */
85 /* some extra for later */
92 struct btrfs_ioctl_search_header {
100 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
102 * the buf is an array of search headers where
103 * each header is followed by the actual item
104 * the type field is expanded to 32 bits for alignment
106 struct btrfs_ioctl_search_args {
107 struct btrfs_ioctl_search_key key;
108 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
111 struct btrfs_ioctl_clone_range_args {
113 __u64 src_offset, src_length;
117 /* flags for the defrag range ioctl */
118 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
119 #define BTRFS_DEFRAG_RANGE_START_IO 2
121 struct btrfs_ioctl_defrag_range_args {
122 /* start of the defrag operation */
125 /* number of bytes to defrag, use (u64)-1 to say all */
129 * flags for the operation, which can include turning
130 * on compression for this one defrag
135 * any extent bigger than this will be considered
136 * already defragged. Use 0 to take the kernel default
137 * Use 1 to say every single extent must be rewritten
141 /* spare for later */
145 struct btrfs_ioctl_space_info {
151 struct btrfs_ioctl_space_args {
154 struct btrfs_ioctl_space_info spaces[0];
157 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
158 struct btrfs_ioctl_vol_args)
159 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
160 struct btrfs_ioctl_vol_args)
161 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
162 struct btrfs_ioctl_vol_args)
163 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
164 struct btrfs_ioctl_vol_args)
165 /* trans start and trans end are dangerous, and only for
166 * use by applications that know how to avoid the
167 * resulting deadlocks
169 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
170 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
171 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
173 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
174 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
175 struct btrfs_ioctl_vol_args)
176 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
177 struct btrfs_ioctl_vol_args)
178 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
179 struct btrfs_ioctl_vol_args)
181 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
182 struct btrfs_ioctl_clone_range_args)
184 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
185 struct btrfs_ioctl_vol_args)
186 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
187 struct btrfs_ioctl_vol_args)
188 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
189 struct btrfs_ioctl_defrag_range_args)
190 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
191 struct btrfs_ioctl_search_args)
192 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
193 struct btrfs_ioctl_ino_lookup_args)
194 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
195 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
196 struct btrfs_ioctl_space_args)
197 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
198 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
199 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
200 struct btrfs_ioctl_vol_args_v2)