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[zfs.git] / include / sys / zfs_ioctl.h
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24
25 #ifndef _SYS_ZFS_IOCTL_H
26 #define _SYS_ZFS_IOCTL_H
27
28 #include <sys/cred.h>
29 #include <sys/dmu.h>
30 #include <sys/zio.h>
31 #include <sys/dsl_deleg.h>
32 #include <sys/spa.h>
33 #include <sys/zfs_stat.h>
34
35 #ifdef _KERNEL
36 #include <sys/nvpair.h>
37 #endif  /* _KERNEL */
38
39 #ifdef  __cplusplus
40 extern "C" {
41 #endif
42
43 /*
44  * Property values for snapdir
45  */
46 #define ZFS_SNAPDIR_HIDDEN              0
47 #define ZFS_SNAPDIR_VISIBLE             1
48
49 /*
50  * Field manipulation macros for the drr_versioninfo field of the
51  * send stream header.
52  */
53
54 /*
55  * Header types for zfs send streams.
56  */
57 typedef enum drr_headertype {
58         DMU_SUBSTREAM = 0x1,
59         DMU_COMPOUNDSTREAM = 0x2
60 } drr_headertype_t;
61
62 #define DMU_GET_STREAM_HDRTYPE(vi)      BF64_GET((vi), 0, 2)
63 #define DMU_SET_STREAM_HDRTYPE(vi, x)   BF64_SET((vi), 0, 2, x)
64
65 #define DMU_GET_FEATUREFLAGS(vi)        BF64_GET((vi), 2, 30)
66 #define DMU_SET_FEATUREFLAGS(vi, x)     BF64_SET((vi), 2, 30, x)
67
68 /*
69  * Feature flags for zfs send streams (flags in drr_versioninfo)
70  */
71
72 #define DMU_BACKUP_FEATURE_DEDUP        (0x1)
73 #define DMU_BACKUP_FEATURE_DEDUPPROPS   (0x2)
74 #define DMU_BACKUP_FEATURE_SA_SPILL     (0x4)
75
76 /*
77  * Mask of all supported backup features
78  */
79 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
80                 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
81
82 /* Are all features in the given flag word currently supported? */
83 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
84
85 /*
86  * The drr_versioninfo field of the dmu_replay_record has the
87  * following layout:
88  *
89  *      64      56      48      40      32      24      16      8       0
90  *      +-------+-------+-------+-------+-------+-------+-------+-------+
91  *      |               reserved        |        feature-flags      |C|S|
92  *      +-------+-------+-------+-------+-------+-------+-------+-------+
93  *
94  * The low order two bits indicate the header type: SUBSTREAM (0x1)
95  * or COMPOUNDSTREAM (0x2).  Using two bits for this is historical:
96  * this field used to be a version number, where the two version types
97  * were 1 and 2.  Using two bits for this allows earlier versions of
98  * the code to be able to recognize send streams that don't use any
99  * of the features indicated by feature flags.
100  */
101
102 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
103
104 #define DRR_FLAG_CLONE          (1<<0)
105 #define DRR_FLAG_CI_DATA        (1<<1)
106
107 /*
108  * flags in the drr_checksumflags field in the DRR_WRITE and
109  * DRR_WRITE_BYREF blocks
110  */
111 #define DRR_CHECKSUM_DEDUP      (1<<0)
112
113 #define DRR_IS_DEDUP_CAPABLE(flags)     ((flags) & DRR_CHECKSUM_DEDUP)
114
115 /*
116  * zfs ioctl command structure
117  */
118 typedef struct dmu_replay_record {
119         enum {
120                 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
121                 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
122                 DRR_SPILL, DRR_NUMTYPES
123         } drr_type;
124         uint32_t drr_payloadlen;
125         union {
126                 struct drr_begin {
127                         uint64_t drr_magic;
128                         uint64_t drr_versioninfo; /* was drr_version */
129                         uint64_t drr_creation_time;
130                         dmu_objset_type_t drr_type;
131                         uint32_t drr_flags;
132                         uint64_t drr_toguid;
133                         uint64_t drr_fromguid;
134                         char drr_toname[MAXNAMELEN];
135                 } drr_begin;
136                 struct drr_end {
137                         zio_cksum_t drr_checksum;
138                         uint64_t drr_toguid;
139                 } drr_end;
140                 struct drr_object {
141                         uint64_t drr_object;
142                         dmu_object_type_t drr_type;
143                         dmu_object_type_t drr_bonustype;
144                         uint32_t drr_blksz;
145                         uint32_t drr_bonuslen;
146                         uint8_t drr_checksumtype;
147                         uint8_t drr_compress;
148                         uint8_t drr_pad[6];
149                         uint64_t drr_toguid;
150                         /* bonus content follows */
151                 } drr_object;
152                 struct drr_freeobjects {
153                         uint64_t drr_firstobj;
154                         uint64_t drr_numobjs;
155                         uint64_t drr_toguid;
156                 } drr_freeobjects;
157                 struct drr_write {
158                         uint64_t drr_object;
159                         dmu_object_type_t drr_type;
160                         uint32_t drr_pad;
161                         uint64_t drr_offset;
162                         uint64_t drr_length;
163                         uint64_t drr_toguid;
164                         uint8_t drr_checksumtype;
165                         uint8_t drr_checksumflags;
166                         uint8_t drr_pad2[6];
167                         ddt_key_t drr_key; /* deduplication key */
168                         /* content follows */
169                 } drr_write;
170                 struct drr_free {
171                         uint64_t drr_object;
172                         uint64_t drr_offset;
173                         uint64_t drr_length;
174                         uint64_t drr_toguid;
175                 } drr_free;
176                 struct drr_write_byref {
177                         /* where to put the data */
178                         uint64_t drr_object;
179                         uint64_t drr_offset;
180                         uint64_t drr_length;
181                         uint64_t drr_toguid;
182                         /* where to find the prior copy of the data */
183                         uint64_t drr_refguid;
184                         uint64_t drr_refobject;
185                         uint64_t drr_refoffset;
186                         /* properties of the data */
187                         uint8_t drr_checksumtype;
188                         uint8_t drr_checksumflags;
189                         uint8_t drr_pad2[6];
190                         ddt_key_t drr_key; /* deduplication key */
191                 } drr_write_byref;
192                 struct drr_spill {
193                         uint64_t drr_object;
194                         uint64_t drr_length;
195                         uint64_t drr_toguid;
196                         uint64_t drr_pad[4]; /* needed for crypto */
197                         /* spill data follows */
198                 } drr_spill;
199         } drr_u;
200 } dmu_replay_record_t;
201
202 /* diff record range types */
203 typedef enum diff_type {
204         DDR_NONE = 0x1,
205         DDR_INUSE = 0x2,
206         DDR_FREE = 0x4
207 } diff_type_t;
208
209 /*
210  * The diff reports back ranges of free or in-use objects.
211  */
212 typedef struct dmu_diff_record {
213         uint64_t ddr_type;
214         uint64_t ddr_first;
215         uint64_t ddr_last;
216 } dmu_diff_record_t;
217
218 typedef struct zinject_record {
219         uint64_t        zi_objset;
220         uint64_t        zi_object;
221         uint64_t        zi_start;
222         uint64_t        zi_end;
223         uint64_t        zi_guid;
224         uint32_t        zi_level;
225         uint32_t        zi_error;
226         uint64_t        zi_type;
227         uint32_t        zi_freq;
228         uint32_t        zi_failfast;
229         char            zi_func[MAXNAMELEN];
230         uint32_t        zi_iotype;
231         int32_t         zi_duration;
232         uint64_t        zi_timer;
233 } zinject_record_t;
234
235 #define ZINJECT_NULL            0x1
236 #define ZINJECT_FLUSH_ARC       0x2
237 #define ZINJECT_UNLOAD_SPA      0x4
238
239 #define ZEVENT_NONBLOCK         0x1
240 #define ZEVENT_SIZE             1024
241
242 typedef struct zfs_share {
243         uint64_t        z_exportdata;
244         uint64_t        z_sharedata;
245         uint64_t        z_sharetype;    /* 0 = share, 1 = unshare */
246         uint64_t        z_sharemax;  /* max length of share string */
247 } zfs_share_t;
248
249 /*
250  * ZFS file systems may behave the usual, POSIX-compliant way, where
251  * name lookups are case-sensitive.  They may also be set up so that
252  * all the name lookups are case-insensitive, or so that only some
253  * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
254  */
255 typedef enum zfs_case {
256         ZFS_CASE_SENSITIVE,
257         ZFS_CASE_INSENSITIVE,
258         ZFS_CASE_MIXED
259 } zfs_case_t;
260
261 typedef struct zfs_cmd {
262         char            zc_name[MAXPATHLEN];
263         char            zc_value[MAXPATHLEN * 2];
264         char            zc_string[MAXNAMELEN];
265         char            zc_top_ds[MAXPATHLEN];
266         uint64_t        zc_guid;
267         uint64_t        zc_nvlist_conf;         /* really (char *) */
268         uint64_t        zc_nvlist_conf_size;
269         uint64_t        zc_nvlist_src;          /* really (char *) */
270         uint64_t        zc_nvlist_src_size;
271         uint64_t        zc_nvlist_dst;          /* really (char *) */
272         uint64_t        zc_nvlist_dst_size;
273         uint64_t        zc_cookie;
274         uint64_t        zc_objset_type;
275         uint64_t        zc_perm_action;
276         uint64_t        zc_history;             /* really (char *) */
277         uint64_t        zc_history_len;
278         uint64_t        zc_history_offset;
279         uint64_t        zc_obj;
280         uint64_t        zc_iflags;              /* internal to zfs(7fs) */
281         zfs_share_t     zc_share;
282         dmu_objset_stats_t zc_objset_stats;
283         struct drr_begin zc_begin_record;
284         zinject_record_t zc_inject_record;
285         boolean_t       zc_defer_destroy;
286         boolean_t       zc_temphold;
287         uint64_t        zc_action_handle;
288         int             zc_cleanup_fd;
289         uint8_t         zc_pad[4];              /* alignment */
290         uint64_t        zc_sendobj;
291         uint64_t        zc_fromobj;
292         uint64_t        zc_createtxg;
293         zfs_stat_t      zc_stat;
294 } zfs_cmd_t;
295
296 typedef struct zfs_useracct {
297         char zu_domain[256];
298         uid_t zu_rid;
299         uint32_t zu_pad;
300         uint64_t zu_space;
301 } zfs_useracct_t;
302
303 #define ZFSDEV_MAX_MINOR        (1 << 16)
304 #define ZFS_MIN_MINOR   (ZFSDEV_MAX_MINOR + 1)
305
306 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1
307
308 #ifdef _KERNEL
309
310 typedef struct zfs_creat {
311         nvlist_t        *zct_zplprops;
312         nvlist_t        *zct_props;
313 } zfs_creat_t;
314
315 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
316 extern int zfs_secpolicy_rename_perms(const char *from,
317     const char *to, cred_t *cr);
318 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
319 extern int zfs_unmount_snap(const char *, void *);
320
321 enum zfsdev_state_type {
322         ZST_ONEXIT,
323         ZST_ZEVENT,
324         ZST_ALL,
325 };
326
327 typedef struct zfsdev_state {
328         list_node_t             zs_next;        /* next zfsdev_state_t link */
329         struct file             *zs_file;       /* associated file struct */
330         minor_t                 zs_minor;       /* made up minor number */
331         void                    *zs_onexit;     /* onexit data */
332         void                    *zs_zevent;     /* zevent data */
333 } zfsdev_state_t;
334
335 extern void *zfsdev_get_state(minor_t minor, enum zfsdev_state_type which);
336 extern minor_t zfsdev_getminor(struct file *filp);
337 extern minor_t zfsdev_minor_alloc(void);
338
339 #endif  /* _KERNEL */
340
341 #ifdef  __cplusplus
342 }
343 #endif
344
345 #endif  /* _SYS_ZFS_IOCTL_H */