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 struct btrfs_ioctl_search_key {
34 /* which root are we searching. 0 is the tree of tree roots */
37 /* keys returned will be >= min and <= max */
41 /* keys returned will be >= min and <= max */
45 /* max and min transids to search for */
49 /* keys returned will be >= min and <= max */
54 * how many items did userland ask for, and how many are we
59 /* align to 64 bits */
62 /* some extra for later */
69 struct btrfs_ioctl_search_header {
75 } __attribute__((may_alias));
77 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
79 * the buf is an array of search headers where
80 * each header is followed by the actual item
81 * the type field is expanded to 32 bits for alignment
83 struct btrfs_ioctl_search_args {
84 struct btrfs_ioctl_search_key key;
85 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
88 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
89 struct btrfs_ioctl_ino_lookup_args {
92 char name[BTRFS_INO_LOOKUP_PATH_MAX];
95 /* flags for the defrag range ioctl */
96 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
97 #define BTRFS_DEFRAG_RANGE_START_IO 2
99 struct btrfs_ioctl_defrag_range_args {
100 /* start of the defrag operation */
103 /* number of bytes to defrag, use (u64)-1 to say all */
107 * flags for the operation, which can include turning
108 * on compression for this one defrag
113 * any extent bigger than this will be considered
114 * already defragged. Use 0 to take the kernel default
115 * Use 1 to say every single extent must be rewritten
120 * which compression method to use if turning on compression
121 * for this defrag operation. If unspecified, zlib will
126 /* spare for later */
130 struct btrfs_ioctl_space_info {
136 struct btrfs_ioctl_space_args {
139 struct btrfs_ioctl_space_info spaces[0];
142 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
143 struct btrfs_ioctl_vol_args)
144 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
145 struct btrfs_ioctl_vol_args)
146 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
147 struct btrfs_ioctl_vol_args)
148 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
149 struct btrfs_ioctl_vol_args)
150 /* trans start and trans end are dangerous, and only for
151 * use by applications that know how to avoid the
152 * resulting deadlocks
154 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
155 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
156 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
158 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
159 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
160 struct btrfs_ioctl_vol_args)
161 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
162 struct btrfs_ioctl_vol_args)
163 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
164 struct btrfs_ioctl_vol_args)
165 /* 13 is for CLONE_RANGE */
166 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
167 struct btrfs_ioctl_vol_args)
168 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
169 struct btrfs_ioctl_vol_args)
170 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
171 struct btrfs_ioctl_defrag_range_args)
172 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
173 struct btrfs_ioctl_search_args)
174 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
175 struct btrfs_ioctl_ino_lookup_args)
176 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
177 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
178 struct btrfs_ioctl_space_args)