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 26 /* this should be 4k */ 27 #define BTRFS_PATH_NAME_MAX 4087 28 struct btrfs_ioctl_vol_args { 29 __s64 fd; 30 char name[BTRFS_PATH_NAME_MAX + 1]; 31 }; 32 33 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) 34 35 #define BTRFS_SUBVOL_NAME_MAX 4039 36 struct btrfs_ioctl_vol_args_v2 { 37 __s64 fd; 38 __u64 transid; 39 __u64 flags; 40 __u64 unused[4]; 41 char name[BTRFS_SUBVOL_NAME_MAX + 1]; 42 }; 43 44 #define BTRFS_INO_LOOKUP_PATH_MAX 4080 45 struct btrfs_ioctl_ino_lookup_args { 46 __u64 treeid; 47 __u64 objectid; 48 char name[BTRFS_INO_LOOKUP_PATH_MAX]; 49 }; 50 51 struct btrfs_ioctl_search_key { 52 /* which root are we searching. 0 is the tree of tree roots */ 53 __u64 tree_id; 54 55 /* keys returned will be >= min and <= max */ 56 __u64 min_objectid; 57 __u64 max_objectid; 58 59 /* keys returned will be >= min and <= max */ 60 __u64 min_offset; 61 __u64 max_offset; 62 63 /* max and min transids to search for */ 64 __u64 min_transid; 65 __u64 max_transid; 66 67 /* keys returned will be >= min and <= max */ 68 __u32 min_type; 69 __u32 max_type; 70 71 /* 72 * how many items did userland ask for, and how many are we 73 * returning 74 */ 75 __u32 nr_items; 76 77 /* align to 64 bits */ 78 __u32 unused; 79 80 /* some extra for later */ 81 __u64 unused1; 82 __u64 unused2; 83 __u64 unused3; 84 __u64 unused4; 85 }; 86 87 struct btrfs_ioctl_search_header { 88 __u64 transid; 89 __u64 objectid; 90 __u64 offset; 91 __u32 type; 92 __u32 len; 93 }; 94 95 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key)) 96 /* 97 * the buf is an array of search headers where 98 * each header is followed by the actual item 99 * the type field is expanded to 32 bits for alignment 100 */ 101 struct btrfs_ioctl_search_args { 102 struct btrfs_ioctl_search_key key; 103 char buf[BTRFS_SEARCH_ARGS_BUFSIZE]; 104 }; 105 106 struct btrfs_ioctl_clone_range_args { 107 __s64 src_fd; 108 __u64 src_offset, src_length; 109 __u64 dest_offset; 110 }; 111 112 /* flags for the defrag range ioctl */ 113 #define BTRFS_DEFRAG_RANGE_COMPRESS 1 114 #define BTRFS_DEFRAG_RANGE_START_IO 2 115 116 struct btrfs_ioctl_defrag_range_args { 117 /* start of the defrag operation */ 118 __u64 start; 119 120 /* number of bytes to defrag, use (u64)-1 to say all */ 121 __u64 len; 122 123 /* 124 * flags for the operation, which can include turning 125 * on compression for this one defrag 126 */ 127 __u64 flags; 128 129 /* 130 * any extent bigger than this will be considered 131 * already defragged. Use 0 to take the kernel default 132 * Use 1 to say every single extent must be rewritten 133 */ 134 __u32 extent_thresh; 135 136 /* spare for later */ 137 __u32 unused[5]; 138 }; 139 140 struct btrfs_ioctl_space_info { 141 __u64 flags; 142 __u64 total_bytes; 143 __u64 used_bytes; 144 }; 145 146 struct btrfs_ioctl_space_args { 147 __u64 space_slots; 148 __u64 total_spaces; 149 struct btrfs_ioctl_space_info spaces[0]; 150 }; 151 152 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ 153 struct btrfs_ioctl_vol_args) 154 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ 155 struct btrfs_ioctl_vol_args) 156 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \ 157 struct btrfs_ioctl_vol_args) 158 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \ 159 struct btrfs_ioctl_vol_args) 160 /* trans start and trans end are dangerous, and only for 161 * use by applications that know how to avoid the 162 * resulting deadlocks 163 */ 164 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6) 165 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7) 166 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8) 167 168 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int) 169 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \ 170 struct btrfs_ioctl_vol_args) 171 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \ 172 struct btrfs_ioctl_vol_args) 173 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \ 174 struct btrfs_ioctl_vol_args) 175 176 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ 177 struct btrfs_ioctl_clone_range_args) 178 179 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \ 180 struct btrfs_ioctl_vol_args) 181 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \ 182 struct btrfs_ioctl_vol_args) 183 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \ 184 struct btrfs_ioctl_defrag_range_args) 185 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \ 186 struct btrfs_ioctl_search_args) 187 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \ 188 struct btrfs_ioctl_ino_lookup_args) 189 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) 190 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ 191 struct btrfs_ioctl_space_args) 192 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) 193 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) 194 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ 195 struct btrfs_ioctl_vol_args_v2) 196 #endif 197