ioctl.h

   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 <asm/types.h>
  22 #include <linux/ioctl.h>
  23
  24 #define BTRFS_IOCTL_MAGIC 0x94
  25 #define BTRFS_VOL_NAME_MAX 255
  26
  27 /* this should be 4k */
  28 #define BTRFS_PATH_NAME_MAX 4087
  29 struct btrfs_ioctl_vol_args {
  30         __s64 fd;
  31         char name[BTRFS_PATH_NAME_MAX + 1];
  32 };
  33
  34 #define BTRFS_SUBVOL_RDONLY             (1ULL << 1)
  35 #define BTRFS_SUBVOL_NAME_MAX 4039
  36
  37 struct btrfs_ioctl_vol_args_v2 {
  38         __s64 fd;
  39         __u64 transid;
  40         __u64 flags;
  41         __u64 unused[4];
  42         char name[BTRFS_SUBVOL_NAME_MAX + 1];
  43 };
  44
  45 #define BTRFS_FSID_SIZE 16
  46 #define BTRFS_UUID_SIZE 16
  47
  48 struct btrfs_scrub_progress {
  49         __u64 data_extents_scrubbed;
  50         __u64 tree_extents_scrubbed;
  51         __u64 data_bytes_scrubbed;
  52         __u64 tree_bytes_scrubbed;
  53         __u64 read_errors;
  54         __u64 csum_errors;
  55         __u64 verify_errors;
  56         __u64 no_csum;
  57         __u64 csum_discards;
  58         __u64 super_errors;
  59         __u64 malloc_errors;
  60         __u64 uncorrectable_errors;
  61         __u64 corrected_errors;
  62         __u64 last_physical;
  63         __u64 unverified_errors;
  64 };
  65
  66 #define BTRFS_SCRUB_READONLY    1
  67 struct btrfs_ioctl_scrub_args {
  68         __u64 devid;                            /* in */
  69         __u64 start;                            /* in */
  70         __u64 end;                              /* in */
  71         __u64 flags;                            /* in */
  72         struct btrfs_scrub_progress progress;   /* out */
  73         /* pad to 1k */
  74         __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
  75 };
  76
  77 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
  78 struct btrfs_ioctl_dev_info_args {
  79         __u64 devid;                            /* in/out */
  80         __u8 uuid[BTRFS_UUID_SIZE];             /* in/out */
  81         __u64 bytes_used;                       /* out */
  82         __u64 total_bytes;                      /* out */
  83         __u64 unused[379];                      /* pad to 4k */
  84         __u8 path[BTRFS_DEVICE_PATH_NAME_MAX];  /* out */
  85 };
  86
  87 struct btrfs_ioctl_fs_info_args {
  88         __u64 max_id;                           /* out */
  89         __u64 num_devices;                      /* out */
  90         __u8 fsid[BTRFS_FSID_SIZE];             /* out */
  91         __u64 reserved[124];                    /* pad to 1k */
  92 };
  93
  94 struct btrfs_ioctl_search_key {
  95         /* which root are we searching.  0 is the tree of tree roots */
  96         __u64 tree_id;
  97
  98         /* keys returned will be >= min and <= max */
  99         __u64 min_objectid;
 100         __u64 max_objectid;
 101
 102         /* keys returned will be >= min and <= max */
 103         __u64 min_offset;
 104         __u64 max_offset;
 105
 106         /* max and min transids to search for */
 107         __u64 min_transid;
 108         __u64 max_transid;
 109
 110         /* keys returned will be >= min and <= max */
 111         __u32 min_type;
 112         __u32 max_type;
 113
 114         /*
 115          * how many items did userland ask for, and how many are we
 116          * returning
 117          */
 118         __u32 nr_items;
 119
 120         /* align to 64 bits */
 121         __u32 unused;
 122
 123         /* some extra for later */
 124         __u64 unused1;
 125         __u64 unused2;
 126         __u64 unused3;
 127         __u64 unused4;
 128 };
 129
 130 struct btrfs_ioctl_search_header {
 131         __u64 transid;
 132         __u64 objectid;
 133         __u64 offset;
 134         __u32 type;
 135         __u32 len;
 136 } __attribute__((may_alias));
 137
 138 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
 139 /*
 140  * the buf is an array of search headers where
 141  * each header is followed by the actual item
 142  * the type field is expanded to 32 bits for alignment
 143  */
 144 struct btrfs_ioctl_search_args {
 145         struct btrfs_ioctl_search_key key;
 146         char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
 147 };
 148
 149 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
 150 struct btrfs_ioctl_ino_lookup_args {
 151         __u64 treeid;
 152         __u64 objectid;
 153         char name[BTRFS_INO_LOOKUP_PATH_MAX];
 154 };
 155
 156 /* flags for the defrag range ioctl */
 157 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
 158 #define BTRFS_DEFRAG_RANGE_START_IO 2
 159
 160 struct btrfs_ioctl_defrag_range_args {
 161         /* start of the defrag operation */
 162         __u64 start;
 163
 164         /* number of bytes to defrag, use (u64)-1 to say all */
 165         __u64 len;
 166
 167         /*
 168          * flags for the operation, which can include turning
 169          * on compression for this one defrag
 170          */
 171         __u64 flags;
 172
 173         /*
 174          * any extent bigger than this will be considered
 175          * already defragged.  Use 0 to take the kernel default
 176          * Use 1 to say every single extent must be rewritten
 177          */
 178         __u32 extent_thresh;
 179
 180         /*
 181          * which compression method to use if turning on compression
 182          * for this defrag operation.  If unspecified, zlib will
 183          * be used
 184          */
 185         __u32 compress_type;
 186
 187         /* spare for later */
 188         __u32 unused[4];
 189 };
 190
 191 struct btrfs_ioctl_space_info {
 192         __u64 flags;
 193         __u64 total_bytes;
 194         __u64 used_bytes;
 195 };
 196
 197 struct btrfs_ioctl_space_args {
 198         __u64 space_slots;
 199         __u64 total_spaces;
 200         struct btrfs_ioctl_space_info spaces[0];
 201 };
 202
 203 /* BTRFS_IOC_SNAP_CREATE is no longer used by the btrfs command */
 204 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
 205                                    struct btrfs_ioctl_vol_args)
 206 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
 207                                    struct btrfs_ioctl_vol_args)
 208 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
 209                                    struct btrfs_ioctl_vol_args)
 210 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
 211                                    struct btrfs_ioctl_vol_args)
 212 /* trans start and trans end are dangerous, and only for
 213  * use by applications that know how to avoid the
 214  * resulting deadlocks
 215  */
 216 #define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
 217 #define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
 218 #define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)
 219
 220 #define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)
 221 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
 222                                    struct btrfs_ioctl_vol_args)
 223 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
 224                                    struct btrfs_ioctl_vol_args)
 225 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
 226                                    struct btrfs_ioctl_vol_args)
 227 /* 13 is for CLONE_RANGE */
 228 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
 229                                    struct btrfs_ioctl_vol_args)
 230 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
 231                                    struct btrfs_ioctl_vol_args)
 232 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
 233                                 struct btrfs_ioctl_defrag_range_args)
 234 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 235                                    struct btrfs_ioctl_search_args)
 236 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
 237                                    struct btrfs_ioctl_ino_lookup_args)
 238 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
 239 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
 240                                     struct btrfs_ioctl_space_args)
 241 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
 242                                    struct btrfs_ioctl_vol_args_v2)
 243 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
 244                                 struct btrfs_ioctl_scrub_args)
 245 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
 246 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
 247                                         struct btrfs_ioctl_scrub_args)
 248 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
 249                                         struct btrfs_ioctl_dev_info_args)
 250 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
 251                                         struct btrfs_ioctl_fs_info_args)
 252 #endif