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3744 zfs shouldn't ignore errors unmounting snapshots
Submitted by: Will Andrews <willa@spectralogic.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
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--- old/usr/src/uts/common/fs/zfs/sys/zfs_ioctl.h
+++ new/usr/src/uts/common/fs/zfs/sys/zfs_ioctl.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 24 */
25 25
26 26 #ifndef _SYS_ZFS_IOCTL_H
27 27 #define _SYS_ZFS_IOCTL_H
28 28
29 29 #include <sys/cred.h>
30 30 #include <sys/dmu.h>
31 31 #include <sys/zio.h>
32 32 #include <sys/dsl_deleg.h>
33 33 #include <sys/spa.h>
34 34 #include <sys/zfs_stat.h>
35 35
36 36 #ifdef _KERNEL
37 37 #include <sys/nvpair.h>
38 38 #endif /* _KERNEL */
39 39
40 40 #ifdef __cplusplus
41 41 extern "C" {
42 42 #endif
43 43
44 44 /*
45 45 * The structures in this file are passed between userland and the
46 46 * kernel. Userland may be running a 32-bit process, while the kernel
47 47 * is 64-bit. Therefore, these structures need to compile the same in
48 48 * 32-bit and 64-bit. This means not using type "long", and adding
49 49 * explicit padding so that the 32-bit structure will not be packed more
50 50 * tightly than the 64-bit structure (which requires 64-bit alignment).
51 51 */
52 52
53 53 /*
54 54 * Property values for snapdir
55 55 */
56 56 #define ZFS_SNAPDIR_HIDDEN 0
57 57 #define ZFS_SNAPDIR_VISIBLE 1
58 58
59 59 /*
60 60 * Field manipulation macros for the drr_versioninfo field of the
61 61 * send stream header.
62 62 */
63 63
64 64 /*
65 65 * Header types for zfs send streams.
66 66 */
67 67 typedef enum drr_headertype {
68 68 DMU_SUBSTREAM = 0x1,
69 69 DMU_COMPOUNDSTREAM = 0x2
70 70 } drr_headertype_t;
71 71
72 72 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2)
73 73 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x)
74 74
75 75 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30)
76 76 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x)
77 77
78 78 /*
79 79 * Feature flags for zfs send streams (flags in drr_versioninfo)
80 80 */
81 81
82 82 #define DMU_BACKUP_FEATURE_DEDUP (0x1)
83 83 #define DMU_BACKUP_FEATURE_DEDUPPROPS (0x2)
84 84 #define DMU_BACKUP_FEATURE_SA_SPILL (0x4)
85 85
86 86 /*
87 87 * Mask of all supported backup features
88 88 */
89 89 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
90 90 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
91 91
92 92 /* Are all features in the given flag word currently supported? */
93 93 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
94 94
95 95 /*
96 96 * The drr_versioninfo field of the dmu_replay_record has the
97 97 * following layout:
98 98 *
99 99 * 64 56 48 40 32 24 16 8 0
100 100 * +-------+-------+-------+-------+-------+-------+-------+-------+
101 101 * | reserved | feature-flags |C|S|
102 102 * +-------+-------+-------+-------+-------+-------+-------+-------+
103 103 *
104 104 * The low order two bits indicate the header type: SUBSTREAM (0x1)
105 105 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical:
106 106 * this field used to be a version number, where the two version types
107 107 * were 1 and 2. Using two bits for this allows earlier versions of
108 108 * the code to be able to recognize send streams that don't use any
109 109 * of the features indicated by feature flags.
110 110 */
111 111
112 112 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
113 113
114 114 #define DRR_FLAG_CLONE (1<<0)
115 115 #define DRR_FLAG_CI_DATA (1<<1)
116 116
117 117 /*
118 118 * flags in the drr_checksumflags field in the DRR_WRITE and
119 119 * DRR_WRITE_BYREF blocks
120 120 */
121 121 #define DRR_CHECKSUM_DEDUP (1<<0)
122 122
123 123 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP)
124 124
125 125 /*
126 126 * zfs ioctl command structure
127 127 */
128 128 typedef struct dmu_replay_record {
129 129 enum {
130 130 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
131 131 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
132 132 DRR_SPILL, DRR_NUMTYPES
133 133 } drr_type;
134 134 uint32_t drr_payloadlen;
135 135 union {
136 136 struct drr_begin {
137 137 uint64_t drr_magic;
138 138 uint64_t drr_versioninfo; /* was drr_version */
139 139 uint64_t drr_creation_time;
140 140 dmu_objset_type_t drr_type;
141 141 uint32_t drr_flags;
142 142 uint64_t drr_toguid;
143 143 uint64_t drr_fromguid;
144 144 char drr_toname[MAXNAMELEN];
145 145 } drr_begin;
146 146 struct drr_end {
147 147 zio_cksum_t drr_checksum;
148 148 uint64_t drr_toguid;
149 149 } drr_end;
150 150 struct drr_object {
151 151 uint64_t drr_object;
152 152 dmu_object_type_t drr_type;
153 153 dmu_object_type_t drr_bonustype;
154 154 uint32_t drr_blksz;
155 155 uint32_t drr_bonuslen;
156 156 uint8_t drr_checksumtype;
157 157 uint8_t drr_compress;
158 158 uint8_t drr_pad[6];
159 159 uint64_t drr_toguid;
160 160 /* bonus content follows */
161 161 } drr_object;
162 162 struct drr_freeobjects {
163 163 uint64_t drr_firstobj;
164 164 uint64_t drr_numobjs;
165 165 uint64_t drr_toguid;
166 166 } drr_freeobjects;
167 167 struct drr_write {
168 168 uint64_t drr_object;
169 169 dmu_object_type_t drr_type;
170 170 uint32_t drr_pad;
171 171 uint64_t drr_offset;
172 172 uint64_t drr_length;
173 173 uint64_t drr_toguid;
174 174 uint8_t drr_checksumtype;
175 175 uint8_t drr_checksumflags;
176 176 uint8_t drr_pad2[6];
177 177 ddt_key_t drr_key; /* deduplication key */
178 178 /* content follows */
179 179 } drr_write;
180 180 struct drr_free {
181 181 uint64_t drr_object;
182 182 uint64_t drr_offset;
183 183 uint64_t drr_length;
184 184 uint64_t drr_toguid;
185 185 } drr_free;
186 186 struct drr_write_byref {
187 187 /* where to put the data */
188 188 uint64_t drr_object;
189 189 uint64_t drr_offset;
190 190 uint64_t drr_length;
191 191 uint64_t drr_toguid;
192 192 /* where to find the prior copy of the data */
193 193 uint64_t drr_refguid;
194 194 uint64_t drr_refobject;
195 195 uint64_t drr_refoffset;
196 196 /* properties of the data */
197 197 uint8_t drr_checksumtype;
198 198 uint8_t drr_checksumflags;
199 199 uint8_t drr_pad2[6];
200 200 ddt_key_t drr_key; /* deduplication key */
201 201 } drr_write_byref;
202 202 struct drr_spill {
203 203 uint64_t drr_object;
204 204 uint64_t drr_length;
205 205 uint64_t drr_toguid;
206 206 uint64_t drr_pad[4]; /* needed for crypto */
207 207 /* spill data follows */
208 208 } drr_spill;
209 209 } drr_u;
210 210 } dmu_replay_record_t;
211 211
212 212 /* diff record range types */
213 213 typedef enum diff_type {
214 214 DDR_NONE = 0x1,
215 215 DDR_INUSE = 0x2,
216 216 DDR_FREE = 0x4
217 217 } diff_type_t;
218 218
219 219 /*
220 220 * The diff reports back ranges of free or in-use objects.
221 221 */
222 222 typedef struct dmu_diff_record {
223 223 uint64_t ddr_type;
224 224 uint64_t ddr_first;
225 225 uint64_t ddr_last;
226 226 } dmu_diff_record_t;
227 227
228 228 typedef struct zinject_record {
229 229 uint64_t zi_objset;
230 230 uint64_t zi_object;
231 231 uint64_t zi_start;
232 232 uint64_t zi_end;
233 233 uint64_t zi_guid;
234 234 uint32_t zi_level;
235 235 uint32_t zi_error;
236 236 uint64_t zi_type;
237 237 uint32_t zi_freq;
238 238 uint32_t zi_failfast;
239 239 char zi_func[MAXNAMELEN];
240 240 uint32_t zi_iotype;
241 241 int32_t zi_duration;
242 242 uint64_t zi_timer;
243 243 uint32_t zi_cmd;
244 244 uint32_t zi_pad;
245 245 } zinject_record_t;
246 246
247 247 #define ZINJECT_NULL 0x1
248 248 #define ZINJECT_FLUSH_ARC 0x2
249 249 #define ZINJECT_UNLOAD_SPA 0x4
250 250
251 251 typedef enum zinject_type {
252 252 ZINJECT_UNINITIALIZED,
253 253 ZINJECT_DATA_FAULT,
254 254 ZINJECT_DEVICE_FAULT,
255 255 ZINJECT_LABEL_FAULT,
256 256 ZINJECT_IGNORED_WRITES,
257 257 ZINJECT_PANIC,
258 258 ZINJECT_DELAY_IO,
259 259 } zinject_type_t;
260 260
261 261 typedef struct zfs_share {
262 262 uint64_t z_exportdata;
263 263 uint64_t z_sharedata;
264 264 uint64_t z_sharetype; /* 0 = share, 1 = unshare */
265 265 uint64_t z_sharemax; /* max length of share string */
266 266 } zfs_share_t;
267 267
268 268 /*
269 269 * ZFS file systems may behave the usual, POSIX-compliant way, where
270 270 * name lookups are case-sensitive. They may also be set up so that
271 271 * all the name lookups are case-insensitive, or so that only some
272 272 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
273 273 */
274 274 typedef enum zfs_case {
275 275 ZFS_CASE_SENSITIVE,
276 276 ZFS_CASE_INSENSITIVE,
277 277 ZFS_CASE_MIXED
278 278 } zfs_case_t;
279 279
280 280 typedef struct zfs_cmd {
281 281 char zc_name[MAXPATHLEN]; /* name of pool or dataset */
282 282 uint64_t zc_nvlist_src; /* really (char *) */
283 283 uint64_t zc_nvlist_src_size;
284 284 uint64_t zc_nvlist_dst; /* really (char *) */
285 285 uint64_t zc_nvlist_dst_size;
286 286 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */
287 287 int zc_pad2;
288 288
289 289 /*
290 290 * The following members are for legacy ioctls which haven't been
291 291 * converted to the new method.
292 292 */
293 293 uint64_t zc_history; /* really (char *) */
294 294 char zc_value[MAXPATHLEN * 2];
295 295 char zc_string[MAXNAMELEN];
296 296 uint64_t zc_guid;
297 297 uint64_t zc_nvlist_conf; /* really (char *) */
298 298 uint64_t zc_nvlist_conf_size;
299 299 uint64_t zc_cookie;
300 300 uint64_t zc_objset_type;
301 301 uint64_t zc_perm_action;
302 302 uint64_t zc_history_len;
303 303 uint64_t zc_history_offset;
304 304 uint64_t zc_obj;
305 305 uint64_t zc_iflags; /* internal to zfs(7fs) */
306 306 zfs_share_t zc_share;
307 307 dmu_objset_stats_t zc_objset_stats;
308 308 struct drr_begin zc_begin_record;
309 309 zinject_record_t zc_inject_record;
310 310 boolean_t zc_defer_destroy;
311 311 boolean_t zc_temphold;
312 312 uint64_t zc_action_handle;
313 313 int zc_cleanup_fd;
314 314 uint8_t zc_pad[4]; /* alignment */
315 315 uint64_t zc_sendobj;
316 316 uint64_t zc_fromobj;
317 317 uint64_t zc_createtxg;
318 318 zfs_stat_t zc_stat;
319 319 } zfs_cmd_t;
320 320
321 321 typedef struct zfs_useracct {
322 322 char zu_domain[256];
323 323 uid_t zu_rid;
324 324 uint32_t zu_pad;
325 325 uint64_t zu_space;
326 326 } zfs_useracct_t;
327 327
328 328 #define ZFSDEV_MAX_MINOR (1 << 16)
329 329 #define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1)
330 330
331 331 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1
332 332
333 333 #ifdef _KERNEL
334 334
335 335 typedef struct zfs_creat {
336 336 nvlist_t *zct_zplprops;
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337 337 nvlist_t *zct_props;
338 338 } zfs_creat_t;
339 339
340 340 extern dev_info_t *zfs_dip;
341 341
342 342 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
343 343 extern int zfs_secpolicy_rename_perms(const char *from,
344 344 const char *to, cred_t *cr);
345 345 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
346 346 extern int zfs_busy(void);
347 -extern void zfs_unmount_snap(const char *);
347 +extern int zfs_unmount_snap(const char *);
348 348 extern void zfs_destroy_unmount_origin(const char *);
349 349
350 350 /*
351 351 * ZFS minor numbers can refer to either a control device instance or
352 352 * a zvol. Depending on the value of zss_type, zss_data points to either
353 353 * a zvol_state_t or a zfs_onexit_t.
354 354 */
355 355 enum zfs_soft_state_type {
356 356 ZSST_ZVOL,
357 357 ZSST_CTLDEV
358 358 };
359 359
360 360 typedef struct zfs_soft_state {
361 361 enum zfs_soft_state_type zss_type;
362 362 void *zss_data;
363 363 } zfs_soft_state_t;
364 364
365 365 extern void *zfsdev_get_soft_state(minor_t minor,
366 366 enum zfs_soft_state_type which);
367 367 extern minor_t zfsdev_minor_alloc(void);
368 368
369 369 extern void *zfsdev_state;
370 370 extern kmutex_t zfsdev_state_lock;
371 371
372 372 #endif /* _KERNEL */
373 373
374 374 #ifdef __cplusplus
375 375 }
376 376 #endif
377 377
378 378 #endif /* _SYS_ZFS_IOCTL_H */
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