blob: 424694aa517f5b03fd5ee16e4052d4c6c7fd6777 [file] [log] [blame]
Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
Chris Masonc5739bb2007-04-10 09:27:04 -040019#ifndef __IOCTL_
20#define __IOCTL_
21#include <linux/ioctl.h>
22
23#define BTRFS_IOCTL_MAGIC 0x94
24#define BTRFS_VOL_NAME_MAX 255
Chris Masonc071fcf2009-01-16 11:59:08 -050025#define BTRFS_PATH_NAME_MAX 4087
Chris Mason8a4b83c2008-03-24 15:02:07 -040026
Chris Masonc071fcf2009-01-16 11:59:08 -050027/* this should be 4k */
Chris Masonc5739bb2007-04-10 09:27:04 -040028struct btrfs_ioctl_vol_args {
Chris Mason3de45862008-11-17 21:02:50 -050029 __s64 fd;
Chris Mason8a4b83c2008-03-24 15:02:07 -040030 char name[BTRFS_PATH_NAME_MAX + 1];
Chris Masonc5739bb2007-04-10 09:27:04 -040031};
32
Chris Masonac8e9812010-02-28 15:39:26 -050033#define BTRFS_INO_LOOKUP_PATH_MAX 4080
34struct btrfs_ioctl_ino_lookup_args {
35 __u64 treeid;
36 __u64 objectid;
37 char name[BTRFS_INO_LOOKUP_PATH_MAX];
38};
39
40struct btrfs_ioctl_search_key {
41 /* which root are we searching. 0 is the tree of tree roots */
42 __u64 tree_id;
43
44 /* keys returned will be >= min and <= max */
45 __u64 min_objectid;
46 __u64 max_objectid;
47
48 /* keys returned will be >= min and <= max */
49 __u64 min_offset;
50 __u64 max_offset;
51
52 /* max and min transids to search for */
53 __u64 min_transid;
54 __u64 max_transid;
55
56 /* keys returned will be >= min and <= max */
57 __u32 min_type;
58 __u32 max_type;
59
60 /*
61 * how many items did userland ask for, and how many are we
62 * returning
63 */
64 __u32 nr_items;
65
66 /* align to 64 bits */
67 __u32 unused;
68
69 /* some extra for later */
70 __u64 unused1;
71 __u64 unused2;
72 __u64 unused3;
73 __u64 unused4;
74};
75
76struct btrfs_ioctl_search_header {
77 __u64 transid;
78 __u64 objectid;
79 __u64 offset;
80 __u32 type;
81 __u32 len;
82};
83
84#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
85/*
86 * the buf is an array of search headers where
87 * each header is followed by the actual item
88 * the type field is expanded to 32 bits for alignment
89 */
90struct btrfs_ioctl_search_args {
91 struct btrfs_ioctl_search_key key;
92 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
93};
94
Chris Masonc071fcf2009-01-16 11:59:08 -050095struct btrfs_ioctl_clone_range_args {
96 __s64 src_fd;
97 __u64 src_offset, src_length;
98 __u64 dest_offset;
99};
100
Chris Mason1e701a32010-03-11 09:42:04 -0500101/* flags for the defrag range ioctl */
102#define BTRFS_DEFRAG_RANGE_COMPRESS 1
103#define BTRFS_DEFRAG_RANGE_START_IO 2
104
105struct btrfs_ioctl_defrag_range_args {
106 /* start of the defrag operation */
107 __u64 start;
108
109 /* number of bytes to defrag, use (u64)-1 to say all */
110 __u64 len;
111
112 /*
113 * flags for the operation, which can include turning
114 * on compression for this one defrag
115 */
116 __u64 flags;
117
118 /*
119 * any extent bigger than this will be considered
120 * already defragged. Use 0 to take the kernel default
121 * Use 1 to say every single extent must be rewritten
122 */
123 __u32 extent_thresh;
124
125 /* spare for later */
126 __u32 unused[5];
127};
128
Josef Bacik1406e432010-01-13 18:19:06 +0000129struct btrfs_ioctl_space_info {
Sage Weilce769a22010-03-16 00:02:26 +0000130 __u64 flags;
131 __u64 total_bytes;
132 __u64 used_bytes;
Josef Bacik1406e432010-01-13 18:19:06 +0000133};
134
135struct btrfs_ioctl_space_args {
Sage Weilce769a22010-03-16 00:02:26 +0000136 __u64 space_slots;
137 __u64 total_spaces;
Josef Bacik1406e432010-01-13 18:19:06 +0000138 struct btrfs_ioctl_space_info spaces[0];
139};
Chris Mason1e701a32010-03-11 09:42:04 -0500140
Chris Masonc5739bb2007-04-10 09:27:04 -0400141#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
142 struct btrfs_ioctl_vol_args)
Chris Mason6702ed42007-08-07 16:15:09 -0400143#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
Chris Mason8352d8a2007-04-12 10:43:05 -0400144 struct btrfs_ioctl_vol_args)
Chris Masonedbd8d42007-12-21 16:27:24 -0500145#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
146 struct btrfs_ioctl_vol_args)
Chris Mason8a4b83c2008-03-24 15:02:07 -0400147#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
148 struct btrfs_ioctl_vol_args)
Sage Weil6bf13c02008-06-10 10:07:39 -0400149/* trans start and trans end are dangerous, and only for
150 * use by applications that know how to avoid the
151 * resulting deadlocks
152 */
153#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
154#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
155#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
156
Sage Weilf2eb0a22008-05-02 14:43:14 -0400157#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
Chris Mason788f20e2008-04-28 15:29:42 -0400158#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
159 struct btrfs_ioctl_vol_args)
160#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
161 struct btrfs_ioctl_vol_args)
162#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
163 struct btrfs_ioctl_vol_args)
Sage Weilc5c9cd42008-11-12 14:32:25 -0500164
165#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
166 struct btrfs_ioctl_clone_range_args)
167
Chris Mason3de45862008-11-17 21:02:50 -0500168#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
169 struct btrfs_ioctl_vol_args)
Yan, Zheng76dda932009-09-21 16:00:26 -0400170#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
171 struct btrfs_ioctl_vol_args)
Chris Mason1e701a32010-03-11 09:42:04 -0500172#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
173 struct btrfs_ioctl_defrag_range_args)
Chris Masonac8e9812010-02-28 15:39:26 -0500174#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
175 struct btrfs_ioctl_search_args)
176#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
177 struct btrfs_ioctl_ino_lookup_args)
Josef Bacik6ef5ed02009-12-11 21:11:29 +0000178#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
Josef Bacik1406e432010-01-13 18:19:06 +0000179#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
180 struct btrfs_ioctl_space_args)
Chris Masonc5739bb2007-04-10 09:27:04 -0400181#endif