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 <asm/types.h>
22 #include <linux/ioctl.h>
24 #define BTRFS_IOCTL_MAGIC 0x94
25 #define BTRFS_VOL_NAME_MAX 255
26 #define BTRFS_PATH_NAME_MAX 4087
28 struct btrfs_ioctl_vol_args {
30 char name[BTRFS_PATH_NAME_MAX + 1];
33 #define BTRFS_SUBVOL_RDONLY (1ULL << 1)
34 #define BTRFS_SUBVOL_NAME_MAX 4039
36 struct btrfs_ioctl_vol_args_v2 {
41 char name[BTRFS_SUBVOL_NAME_MAX + 1];
44 #define BTRFS_FSID_SIZE 16
45 #define BTRFS_UUID_SIZE 16
47 struct btrfs_ioctl_search_key {
48 /* which root are we searching. 0 is the tree of tree roots */
51 /* keys returned will be >= min and <= max */
55 /* keys returned will be >= min and <= max */
59 /* max and min transids to search for */
63 /* keys returned will be >= min and <= max */
68 * how many items did userland ask for, and how many are we
73 /* align to 64 bits */
76 /* some extra for later */
83 struct btrfs_ioctl_search_header {
89 } __attribute__((may_alias));
91 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
93 * the buf is an array of search headers where
94 * each header is followed by the actual item
95 * the type field is expanded to 32 bits for alignment
97 struct btrfs_ioctl_search_args {
98 struct btrfs_ioctl_search_key key;
99 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
102 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
103 struct btrfs_ioctl_ino_lookup_args {
106 char name[BTRFS_INO_LOOKUP_PATH_MAX];
109 /* flags for the defrag range ioctl */
110 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
111 #define BTRFS_DEFRAG_RANGE_START_IO 2
113 struct btrfs_ioctl_defrag_range_args {
114 /* start of the defrag operation */
117 /* number of bytes to defrag, use (u64)-1 to say all */
121 * flags for the operation, which can include turning
122 * on compression for this one defrag
127 * any extent bigger than this will be considered
128 * already defragged. Use 0 to take the kernel default
129 * Use 1 to say every single extent must be rewritten
134 * which compression method to use if turning on compression
135 * for this defrag operation. If unspecified, zlib will
140 /* spare for later */
144 struct btrfs_ioctl_space_info {
150 struct btrfs_ioctl_space_args {
153 struct btrfs_ioctl_space_info spaces[0];
156 /* BTRFS_IOC_SNAP_CREATE is no longer used by the btrfs command */
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)
180 /* 13 is for CLONE_RANGE */
181 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
182 struct btrfs_ioctl_vol_args)
183 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
184 struct btrfs_ioctl_vol_args)
185 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
186 struct btrfs_ioctl_defrag_range_args)
187 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
188 struct btrfs_ioctl_search_args)
189 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
190 struct btrfs_ioctl_ino_lookup_args)
191 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
192 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
193 struct btrfs_ioctl_space_args)
194 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
195 struct btrfs_ioctl_vol_args_v2)