1/* 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 19#ifndef __IOCTL_ 20#define __IOCTL_ 21#include <linux/ioctl.h> 22 23#define BTRFS_IOCTL_MAGIC 0x94 24#define BTRFS_VOL_NAME_MAX 255 25#define BTRFS_PATH_NAME_MAX 4087 26 27/* this should be 4k */ 28struct btrfs_ioctl_vol_args { 29 __s64 fd; 30 char name[BTRFS_PATH_NAME_MAX + 1]; 31}; 32 33#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 95struct btrfs_ioctl_clone_range_args { 96 __s64 src_fd; 97 __u64 src_offset, src_length; 98 __u64 dest_offset; 99}; 100 101/* 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 129struct btrfs_ioctl_space_info { 130 __u64 flags; 131 __u64 total_bytes; 132 __u64 used_bytes; 133}; 134 135struct btrfs_ioctl_space_args { 136 __u64 space_slots; 137 __u64 total_spaces; 138 struct btrfs_ioctl_space_info spaces[0]; 139}; 140 141#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ 142 struct btrfs_ioctl_vol_args) 143#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ 144 struct btrfs_ioctl_vol_args) 145#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \ 146 struct btrfs_ioctl_vol_args) 147#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \ 148 struct btrfs_ioctl_vol_args) 149/* 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) 156 157#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int) 158#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) 164 165#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ 166 struct btrfs_ioctl_clone_range_args) 167 168#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \ 169 struct btrfs_ioctl_vol_args) 170#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \ 171 struct btrfs_ioctl_vol_args) 172#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \ 173 struct btrfs_ioctl_defrag_range_args) 174#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) 178#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) 179#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ 180 struct btrfs_ioctl_space_args) 181#endif 182