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 #define BTRFS_SUBVOL_RDONLY (1ULL << 1) 35 #define BTRFS_FSID_SIZE 16 36 #define BTRFS_UUID_SIZE 16 37 38 #define BTRFS_SUBVOL_NAME_MAX 4039 39 struct btrfs_ioctl_vol_args_v2 { 40 __s64 fd; 41 __u64 transid; 42 __u64 flags; 43 __u64 unused[4]; 44 char name[BTRFS_SUBVOL_NAME_MAX + 1]; 45 }; 46 47 /* 48 * structure to report errors and progress to userspace, either as a 49 * result of a finished scrub, a canceled scrub or a progress inquiry 50 */ 51 struct btrfs_scrub_progress { 52 __u64 data_extents_scrubbed; /* # of data extents scrubbed */ 53 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */ 54 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */ 55 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */ 56 __u64 read_errors; /* # of read errors encountered (EIO) */ 57 __u64 csum_errors; /* # of failed csum checks */ 58 __u64 verify_errors; /* # of occurences, where the metadata 59 * of a tree block did not match the 60 * expected values, like generation or 61 * logical */ 62 __u64 no_csum; /* # of 4k data block for which no csum 63 * is present, probably the result of 64 * data written with nodatasum */ 65 __u64 csum_discards; /* # of csum for which no data was found 66 * in the extent tree. */ 67 __u64 super_errors; /* # of bad super blocks encountered */ 68 __u64 malloc_errors; /* # of internal kmalloc errors. These 69 * will likely cause an incomplete 70 * scrub */ 71 __u64 uncorrectable_errors; /* # of errors where either no intact 72 * copy was found or the writeback 73 * failed */ 74 __u64 corrected_errors; /* # of errors corrected */ 75 __u64 last_physical; /* last physical address scrubbed. In 76 * case a scrub was aborted, this can 77 * be used to restart the scrub */ 78 __u64 unverified_errors; /* # of occurences where a read for a 79 * full (64k) bio failed, but the re- 80 * check succeeded for each 4k piece. 81 * Intermittent error. */ 82 }; 83 84 #define BTRFS_SCRUB_READONLY 1 85 struct btrfs_ioctl_scrub_args { 86 __u64 devid; /* in */ 87 __u64 start; /* in */ 88 __u64 end; /* in */ 89 __u64 flags; /* in */ 90 struct btrfs_scrub_progress progress; /* out */ 91 /* pad to 1k */ 92 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8]; 93 }; 94 95 #define BTRFS_DEVICE_PATH_NAME_MAX 1024 96 struct btrfs_ioctl_dev_info_args { 97 __u64 devid; /* in/out */ 98 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */ 99 __u64 bytes_used; /* out */ 100 __u64 total_bytes; /* out */ 101 __u64 unused[379]; /* pad to 4k */ 102 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */ 103 }; 104 105 struct btrfs_ioctl_fs_info_args { 106 __u64 max_id; /* out */ 107 __u64 num_devices; /* out */ 108 __u8 fsid[BTRFS_FSID_SIZE]; /* out */ 109 __u64 reserved[124]; /* pad to 1k */ 110 }; 111 112 #define BTRFS_INO_LOOKUP_PATH_MAX 4080 113 struct btrfs_ioctl_ino_lookup_args { 114 __u64 treeid; 115 __u64 objectid; 116 char name[BTRFS_INO_LOOKUP_PATH_MAX]; 117 }; 118 119 struct btrfs_ioctl_search_key { 120 /* which root are we searching. 0 is the tree of tree roots */ 121 __u64 tree_id; 122 123 /* keys returned will be >= min and <= max */ 124 __u64 min_objectid; 125 __u64 max_objectid; 126 127 /* keys returned will be >= min and <= max */ 128 __u64 min_offset; 129 __u64 max_offset; 130 131 /* max and min transids to search for */ 132 __u64 min_transid; 133 __u64 max_transid; 134 135 /* keys returned will be >= min and <= max */ 136 __u32 min_type; 137 __u32 max_type; 138 139 /* 140 * how many items did userland ask for, and how many are we 141 * returning 142 */ 143 __u32 nr_items; 144 145 /* align to 64 bits */ 146 __u32 unused; 147 148 /* some extra for later */ 149 __u64 unused1; 150 __u64 unused2; 151 __u64 unused3; 152 __u64 unused4; 153 }; 154 155 struct btrfs_ioctl_search_header { 156 __u64 transid; 157 __u64 objectid; 158 __u64 offset; 159 __u32 type; 160 __u32 len; 161 }; 162 163 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key)) 164 /* 165 * the buf is an array of search headers where 166 * each header is followed by the actual item 167 * the type field is expanded to 32 bits for alignment 168 */ 169 struct btrfs_ioctl_search_args { 170 struct btrfs_ioctl_search_key key; 171 char buf[BTRFS_SEARCH_ARGS_BUFSIZE]; 172 }; 173 174 struct btrfs_ioctl_clone_range_args { 175 __s64 src_fd; 176 __u64 src_offset, src_length; 177 __u64 dest_offset; 178 }; 179 180 /* flags for the defrag range ioctl */ 181 #define BTRFS_DEFRAG_RANGE_COMPRESS 1 182 #define BTRFS_DEFRAG_RANGE_START_IO 2 183 184 struct btrfs_ioctl_space_info { 185 __u64 flags; 186 __u64 total_bytes; 187 __u64 used_bytes; 188 }; 189 190 struct btrfs_ioctl_space_args { 191 __u64 space_slots; 192 __u64 total_spaces; 193 struct btrfs_ioctl_space_info spaces[0]; 194 }; 195 196 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ 197 struct btrfs_ioctl_vol_args) 198 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ 199 struct btrfs_ioctl_vol_args) 200 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \ 201 struct btrfs_ioctl_vol_args) 202 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \ 203 struct btrfs_ioctl_vol_args) 204 /* trans start and trans end are dangerous, and only for 205 * use by applications that know how to avoid the 206 * resulting deadlocks 207 */ 208 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6) 209 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7) 210 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8) 211 212 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int) 213 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \ 214 struct btrfs_ioctl_vol_args) 215 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \ 216 struct btrfs_ioctl_vol_args) 217 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \ 218 struct btrfs_ioctl_vol_args) 219 220 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ 221 struct btrfs_ioctl_clone_range_args) 222 223 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \ 224 struct btrfs_ioctl_vol_args) 225 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \ 226 struct btrfs_ioctl_vol_args) 227 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \ 228 struct btrfs_ioctl_defrag_range_args) 229 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \ 230 struct btrfs_ioctl_search_args) 231 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \ 232 struct btrfs_ioctl_ino_lookup_args) 233 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) 234 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ 235 struct btrfs_ioctl_space_args) 236 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) 237 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) 238 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ 239 struct btrfs_ioctl_vol_args_v2) 240 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 25, __u64) 241 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64) 242 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \ 243 struct btrfs_ioctl_scrub_args) 244 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28) 245 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \ 246 struct btrfs_ioctl_scrub_args) 247 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \ 248 struct btrfs_ioctl_dev_info_args) 249 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \ 250 struct btrfs_ioctl_fs_info_args) 251 #endif 252