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TOMOYO Linux Cross Reference
Linux/fs/btrfs/ioctl.h

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  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 

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