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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 Mason8a4b83c2008-03-24 15:02:07 -040025
Chris Masonc071fcf2009-01-16 11:59:08 -050026/* this should be 4k */
Sage Weil72fd0322010-10-29 15:41:32 -040027#define BTRFS_PATH_NAME_MAX 4087
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
Li Zefanfdfb1e42010-12-10 06:41:56 +000033#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
Li Zefanb83cc962010-12-20 16:04:08 +080034#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
Li Zefanfdfb1e42010-12-10 06:41:56 +000035
36#define BTRFS_SUBVOL_NAME_MAX 4039
37struct btrfs_ioctl_vol_args_v2 {
Sage Weil72fd0322010-10-29 15:41:32 -040038 __s64 fd;
39 __u64 transid;
Li Zefanfdfb1e42010-12-10 06:41:56 +000040 __u64 flags;
41 __u64 unused[4];
42 char name[BTRFS_SUBVOL_NAME_MAX + 1];
Sage Weil72fd0322010-10-29 15:41:32 -040043};
44
Chris Masonac8e9812010-02-28 15:39:26 -050045#define BTRFS_INO_LOOKUP_PATH_MAX 4080
46struct btrfs_ioctl_ino_lookup_args {
47 __u64 treeid;
48 __u64 objectid;
49 char name[BTRFS_INO_LOOKUP_PATH_MAX];
50};
51
52struct btrfs_ioctl_search_key {
53 /* which root are we searching. 0 is the tree of tree roots */
54 __u64 tree_id;
55
56 /* keys returned will be >= min and <= max */
57 __u64 min_objectid;
58 __u64 max_objectid;
59
60 /* keys returned will be >= min and <= max */
61 __u64 min_offset;
62 __u64 max_offset;
63
64 /* max and min transids to search for */
65 __u64 min_transid;
66 __u64 max_transid;
67
68 /* keys returned will be >= min and <= max */
69 __u32 min_type;
70 __u32 max_type;
71
72 /*
73 * how many items did userland ask for, and how many are we
74 * returning
75 */
76 __u32 nr_items;
77
78 /* align to 64 bits */
79 __u32 unused;
80
81 /* some extra for later */
82 __u64 unused1;
83 __u64 unused2;
84 __u64 unused3;
85 __u64 unused4;
86};
87
88struct btrfs_ioctl_search_header {
89 __u64 transid;
90 __u64 objectid;
91 __u64 offset;
92 __u32 type;
93 __u32 len;
94};
95
96#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
97/*
98 * the buf is an array of search headers where
99 * each header is followed by the actual item
100 * the type field is expanded to 32 bits for alignment
101 */
102struct btrfs_ioctl_search_args {
103 struct btrfs_ioctl_search_key key;
104 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
105};
106
Chris Masonc071fcf2009-01-16 11:59:08 -0500107struct btrfs_ioctl_clone_range_args {
108 __s64 src_fd;
109 __u64 src_offset, src_length;
110 __u64 dest_offset;
111};
112
Chris Mason1e701a32010-03-11 09:42:04 -0500113/* flags for the defrag range ioctl */
114#define BTRFS_DEFRAG_RANGE_COMPRESS 1
115#define BTRFS_DEFRAG_RANGE_START_IO 2
116
117struct btrfs_ioctl_defrag_range_args {
118 /* start of the defrag operation */
119 __u64 start;
120
121 /* number of bytes to defrag, use (u64)-1 to say all */
122 __u64 len;
123
124 /*
125 * flags for the operation, which can include turning
126 * on compression for this one defrag
127 */
128 __u64 flags;
129
130 /*
131 * any extent bigger than this will be considered
132 * already defragged. Use 0 to take the kernel default
133 * Use 1 to say every single extent must be rewritten
134 */
135 __u32 extent_thresh;
136
137 /* spare for later */
138 __u32 unused[5];
139};
140
Josef Bacik1406e432010-01-13 18:19:06 +0000141struct btrfs_ioctl_space_info {
Sage Weilce769a22010-03-16 00:02:26 +0000142 __u64 flags;
143 __u64 total_bytes;
144 __u64 used_bytes;
Josef Bacik1406e432010-01-13 18:19:06 +0000145};
146
147struct btrfs_ioctl_space_args {
Sage Weilce769a22010-03-16 00:02:26 +0000148 __u64 space_slots;
149 __u64 total_spaces;
Josef Bacik1406e432010-01-13 18:19:06 +0000150 struct btrfs_ioctl_space_info spaces[0];
151};
Chris Mason1e701a32010-03-11 09:42:04 -0500152
Chris Masonc5739bb2007-04-10 09:27:04 -0400153#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
154 struct btrfs_ioctl_vol_args)
Chris Mason6702ed42007-08-07 16:15:09 -0400155#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
Chris Mason8352d8a2007-04-12 10:43:05 -0400156 struct btrfs_ioctl_vol_args)
Chris Masonedbd8d42007-12-21 16:27:24 -0500157#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
158 struct btrfs_ioctl_vol_args)
Chris Mason8a4b83c2008-03-24 15:02:07 -0400159#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
160 struct btrfs_ioctl_vol_args)
Sage Weil6bf13c02008-06-10 10:07:39 -0400161/* trans start and trans end are dangerous, and only for
162 * use by applications that know how to avoid the
163 * resulting deadlocks
164 */
165#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
166#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
167#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
168
Sage Weilf2eb0a22008-05-02 14:43:14 -0400169#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
Chris Mason788f20e2008-04-28 15:29:42 -0400170#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
171 struct btrfs_ioctl_vol_args)
172#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
173 struct btrfs_ioctl_vol_args)
174#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
175 struct btrfs_ioctl_vol_args)
Sage Weilc5c9cd42008-11-12 14:32:25 -0500176
177#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
178 struct btrfs_ioctl_clone_range_args)
179
Chris Mason3de45862008-11-17 21:02:50 -0500180#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
181 struct btrfs_ioctl_vol_args)
Yan, Zheng76dda932009-09-21 16:00:26 -0400182#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
183 struct btrfs_ioctl_vol_args)
Chris Mason1e701a32010-03-11 09:42:04 -0500184#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
185 struct btrfs_ioctl_defrag_range_args)
Chris Masonac8e9812010-02-28 15:39:26 -0500186#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
187 struct btrfs_ioctl_search_args)
188#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
189 struct btrfs_ioctl_ino_lookup_args)
Josef Bacik6ef5ed02009-12-11 21:11:29 +0000190#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
Josef Bacik1406e432010-01-13 18:19:06 +0000191#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
192 struct btrfs_ioctl_space_args)
Sage Weil46204592010-10-29 15:41:32 -0400193#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
194#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
Li Zefanfdfb1e42010-12-10 06:41:56 +0000195#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
196 struct btrfs_ioctl_vol_args_v2)
Chris Masonc5739bb2007-04-10 09:27:04 -0400197#endif