fs/ocfs2/ocfs2_ioctl.h

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * ocfs2_ioctl.h
   5  *
   6  * Defines OCFS2 ioctls.
   7  *
   8  * Copyright (C) 2010 Oracle.  All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public
  12  * License, version 2, as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  */
  19
  20 #ifndef OCFS2_IOCTL_H
  21 #define OCFS2_IOCTL_H
  22
  23 /*
  24  * ioctl commands
  25  */
  26 #define OCFS2_IOC_GETFLAGS      FS_IOC_GETFLAGS
  27 #define OCFS2_IOC_SETFLAGS      FS_IOC_SETFLAGS
  28 #define OCFS2_IOC32_GETFLAGS    FS_IOC32_GETFLAGS
  29 #define OCFS2_IOC32_SETFLAGS    FS_IOC32_SETFLAGS
  30
  31 /*
  32  * Space reservation / allocation / free ioctls and argument structure
  33  * are designed to be compatible with XFS.
  34  *
  35  * ALLOCSP* and FREESP* are not and will never be supported, but are
  36  * included here for completeness.
  37  */
  38 struct ocfs2_space_resv {
  39         __s16           l_type;
  40         __s16           l_whence;
  41         __s64           l_start;
  42         __s64           l_len;          /* len == 0 means until end of file */
  43         __s32           l_sysid;
  44         __u32           l_pid;
  45         __s32           l_pad[4];       /* reserve area                     */
  46 };
  47
  48 #define OCFS2_IOC_ALLOCSP               _IOW ('X', 10, struct ocfs2_space_resv)
  49 #define OCFS2_IOC_FREESP                _IOW ('X', 11, struct ocfs2_space_resv)
  50 #define OCFS2_IOC_RESVSP                _IOW ('X', 40, struct ocfs2_space_resv)
  51 #define OCFS2_IOC_UNRESVSP      _IOW ('X', 41, struct ocfs2_space_resv)
  52 #define OCFS2_IOC_ALLOCSP64     _IOW ('X', 36, struct ocfs2_space_resv)
  53 #define OCFS2_IOC_FREESP64      _IOW ('X', 37, struct ocfs2_space_resv)
  54 #define OCFS2_IOC_RESVSP64      _IOW ('X', 42, struct ocfs2_space_resv)
  55 #define OCFS2_IOC_UNRESVSP64    _IOW ('X', 43, struct ocfs2_space_resv)
  56
  57 /* Used to pass group descriptor data when online resize is done */
  58 struct ocfs2_new_group_input {
  59         __u64 group;            /* Group descriptor's blkno. */
  60         __u32 clusters;         /* Total number of clusters in this group */
  61         __u32 frees;            /* Total free clusters in this group */
  62         __u16 chain;            /* Chain for this group */
  63         __u16 reserved1;
  64         __u32 reserved2;
  65 };
  66
  67 #define OCFS2_IOC_GROUP_EXTEND  _IOW('o', 1, int)
  68 #define OCFS2_IOC_GROUP_ADD     _IOW('o', 2,struct ocfs2_new_group_input)
  69 #define OCFS2_IOC_GROUP_ADD64   _IOW('o', 3,struct ocfs2_new_group_input)
  70
  71 /* Used to pass 2 file names to reflink. */
  72 struct reflink_arguments {
  73         __u64 old_path;
  74         __u64 new_path;
  75         __u64 preserve;
  76 };
  77 #define OCFS2_IOC_REFLINK       _IOW('o', 4, struct reflink_arguments)
  78
  79 /* Following definitions dedicated for ocfs2_info_request ioctls. */
  80 #define OCFS2_INFO_MAX_REQUEST          (50)
  81 #define OCFS2_TEXT_UUID_LEN             (OCFS2_VOL_UUID_LEN * 2)
  82
  83 /* Magic number of all requests */
  84 #define OCFS2_INFO_MAGIC                (0x4F32494E)
  85
  86 /*
  87  * Always try to separate info request into small pieces to
  88  * guarantee the backward&forward compatibility.
  89  */
  90 struct ocfs2_info {
  91         __u64 oi_requests;      /* Array of __u64 pointers to requests */
  92         __u32 oi_count;         /* Number of requests in info_requests */
  93         __u32 oi_pad;
  94 };
  95
  96 struct ocfs2_info_request {
  97 /*00*/  __u32 ir_magic; /* Magic number */
  98         __u32 ir_code;  /* Info request code */
  99         __u32 ir_size;  /* Size of request */
 100         __u32 ir_flags; /* Request flags */
 101 /*10*/                  /* Request specific fields */
 102 };
 103
 104 struct ocfs2_info_clustersize {
 105         struct ocfs2_info_request ic_req;
 106         __u32 ic_clustersize;
 107         __u32 ic_pad;
 108 };
 109
 110 struct ocfs2_info_blocksize {
 111         struct ocfs2_info_request ib_req;
 112         __u32 ib_blocksize;
 113         __u32 ib_pad;
 114 };
 115
 116 struct ocfs2_info_maxslots {
 117         struct ocfs2_info_request im_req;
 118         __u32 im_max_slots;
 119         __u32 im_pad;
 120 };
 121
 122 struct ocfs2_info_label {
 123         struct ocfs2_info_request il_req;
 124         __u8    il_label[OCFS2_MAX_VOL_LABEL_LEN];
 125 } __attribute__ ((packed));
 126
 127 struct ocfs2_info_uuid {
 128         struct ocfs2_info_request iu_req;
 129         __u8    iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
 130 } __attribute__ ((packed));
 131
 132 struct ocfs2_info_fs_features {
 133         struct ocfs2_info_request if_req;
 134         __u32 if_compat_features;
 135         __u32 if_incompat_features;
 136         __u32 if_ro_compat_features;
 137         __u32 if_pad;
 138 };
 139
 140 struct ocfs2_info_journal_size {
 141         struct ocfs2_info_request ij_req;
 142         __u64 ij_journal_size;
 143 };
 144
 145 struct ocfs2_info_freeinode {
 146         struct ocfs2_info_request ifi_req;
 147         struct ocfs2_info_local_freeinode {
 148                 __u64 lfi_total;
 149                 __u64 lfi_free;
 150         } ifi_stat[OCFS2_MAX_SLOTS];
 151         __u32 ifi_slotnum; /* out */
 152         __u32 ifi_pad;
 153 };
 154
 155 #define OCFS2_INFO_MAX_HIST     (32)
 156
 157 struct ocfs2_info_freefrag {
 158         struct ocfs2_info_request iff_req;
 159         struct ocfs2_info_freefrag_stats { /* (out) */
 160                 struct ocfs2_info_free_chunk_list {
 161                         __u32 fc_chunks[OCFS2_INFO_MAX_HIST];
 162                         __u32 fc_clusters[OCFS2_INFO_MAX_HIST];
 163                 } ffs_fc_hist;
 164                 __u32 ffs_clusters;
 165                 __u32 ffs_free_clusters;
 166                 __u32 ffs_free_chunks;
 167                 __u32 ffs_free_chunks_real;
 168                 __u32 ffs_min; /* Minimum free chunksize in clusters */
 169                 __u32 ffs_max;
 170                 __u32 ffs_avg;
 171                 __u32 ffs_pad;
 172         } iff_ffs;
 173         __u32 iff_chunksize; /* chunksize in clusters(in) */
 174         __u32 iff_pad;
 175 };
 176
 177 /* Codes for ocfs2_info_request */
 178 enum ocfs2_info_type {
 179         OCFS2_INFO_CLUSTERSIZE = 1,
 180         OCFS2_INFO_BLOCKSIZE,
 181         OCFS2_INFO_MAXSLOTS,
 182         OCFS2_INFO_LABEL,
 183         OCFS2_INFO_UUID,
 184         OCFS2_INFO_FS_FEATURES,
 185         OCFS2_INFO_JOURNAL_SIZE,
 186         OCFS2_INFO_FREEINODE,
 187         OCFS2_INFO_FREEFRAG,
 188         OCFS2_INFO_NUM_TYPES
 189 };
 190
 191 /* Flags for struct ocfs2_info_request */
 192 /* Filled by the caller */
 193 #define OCFS2_INFO_FL_NON_COHERENT      (0x00000001)    /* Cluster coherency not
 194                                                            required. This is a hint.
 195                                                            It is up to ocfs2 whether
 196                                                            the request can be fulfilled
 197                                                            without locking. */
 198 /* Filled by ocfs2 */
 199 #define OCFS2_INFO_FL_FILLED            (0x40000000)    /* Filesystem understood
 200                                                            this request and
 201                                                            filled in the answer */
 202
 203 #define OCFS2_INFO_FL_ERROR             (0x80000000)    /* Error happened during
 204                                                            request handling. */
 205
 206 #define OCFS2_IOC_INFO          _IOR('o', 5, struct ocfs2_info)
 207
 208 struct ocfs2_move_extents {
 209 /* All values are in bytes */
 210         /* in */
 211         __u64 me_start;         /* Virtual start in the file to move */
 212         __u64 me_len;           /* Length of the extents to be moved */
 213         __u64 me_goal;          /* Physical offset of the goal,
 214                                    it's in block unit */
 215         __u64 me_threshold;     /* Maximum distance from goal or threshold
 216                                    for auto defragmentation */
 217         __u64 me_flags;         /* Flags for the operation:
 218                                  * - auto defragmentation.
 219                                  * - refcount,xattr cases.
 220                                  */
 221         /* out */
 222         __u64 me_moved_len;     /* Moved/defraged length */
 223         __u64 me_new_offset;    /* Resulting physical location */
 224         __u32 me_reserved[2];   /* Reserved for futhure */
 225 };
 226
 227 #define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG   (0x00000001)    /* Kernel manages to
 228                                                            claim new clusters
 229                                                            as the goal place
 230                                                            for extents moving */
 231 #define OCFS2_MOVE_EXT_FL_PART_DEFRAG   (0x00000002)    /* Allow partial extent
 232                                                            moving, is to make
 233                                                            movement less likely
 234                                                            to fail, may make fs
 235                                                            even more fragmented */
 236 #define OCFS2_MOVE_EXT_FL_COMPLETE      (0x00000004)    /* Move or defragmenation
 237                                                            completely gets done.
 238                                                          */
 239
 240 #define OCFS2_IOC_MOVE_EXT      _IOW('o', 6, struct ocfs2_move_extents)
 241
 242 #endif /* OCFS2_IOCTL_H */