3 * Copyright (C) 2007 Oracle. All rights reserved.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License v2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public
15 * License along with this program; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 021110-1307, USA.
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 /* this should be 4k */
29 struct btrfs_ioctl_vol_args {
31 char name[BTRFS_PATH_NAME_MAX + 1];
34 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
35 struct btrfs_ioctl_ino_lookup_args {
38 char name[BTRFS_INO_LOOKUP_PATH_MAX];
41 struct btrfs_ioctl_search_key {
42 /* which root are we searching. 0 is the tree of tree roots */
45 /* keys returned will be >= min and <= max */
49 /* keys returned will be >= min and <= max */
53 /* max and min transids to search for */
57 /* keys returned will be >= min and <= max */
62 * how many items did userland ask for, and how many are we
67 /* align to 64 bits */
70 /* some extra for later */
77 struct btrfs_ioctl_search_header {
85 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
87 * the buf is an array of search headers where
88 * each header is followed by the actual item
89 * the type field is expanded to 32 bits for alignment
91 struct btrfs_ioctl_search_args {
92 struct btrfs_ioctl_search_key key;
93 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
96 struct btrfs_ioctl_clone_range_args {
98 __u64 src_offset, src_length;
102 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
103 struct btrfs_ioctl_vol_args)
104 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
105 struct btrfs_ioctl_vol_args)
106 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
107 struct btrfs_ioctl_vol_args)
108 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
109 struct btrfs_ioctl_vol_args)
110 /* trans start and trans end are dangerous, and only for
111 * use by applications that know how to avoid the
112 * resulting deadlocks
114 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
115 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
116 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
118 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
119 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
120 struct btrfs_ioctl_vol_args)
121 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
122 struct btrfs_ioctl_vol_args)
123 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
124 struct btrfs_ioctl_vol_args)
126 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
127 struct btrfs_ioctl_clone_range_args)
129 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
130 struct btrfs_ioctl_vol_args)
131 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
132 struct btrfs_ioctl_vol_args)
133 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
134 struct btrfs_ioctl_search_args)
135 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
136 struct btrfs_ioctl_ino_lookup_args)
137 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)