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3752 want more verifiable dbuf user eviction
Submitted by: Justin Gibbs <justing@spectralogic.com>
Submitted by: Will Andrews <willa@spectralogic.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 *
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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 +#ifndef _KERNEL
30 +#include <stddef.h>
31 +#endif
29 32 #include <sys/cred.h>
30 33 #include <sys/dmu.h>
31 34 #include <sys/zio.h>
32 35 #include <sys/dsl_deleg.h>
33 36 #include <sys/spa.h>
34 37 #include <sys/zfs_stat.h>
35 38
36 39 #ifdef _KERNEL
37 40 #include <sys/nvpair.h>
38 41 #endif /* _KERNEL */
39 42
40 43 #ifdef __cplusplus
41 44 extern "C" {
42 45 #endif
43 46
44 47 /*
45 48 * The structures in this file are passed between userland and the
46 49 * kernel. Userland may be running a 32-bit process, while the kernel
47 50 * is 64-bit. Therefore, these structures need to compile the same in
48 51 * 32-bit and 64-bit. This means not using type "long", and adding
49 52 * explicit padding so that the 32-bit structure will not be packed more
50 53 * tightly than the 64-bit structure (which requires 64-bit alignment).
51 54 */
52 55
53 56 /*
54 57 * Property values for snapdir
55 58 */
56 59 #define ZFS_SNAPDIR_HIDDEN 0
57 60 #define ZFS_SNAPDIR_VISIBLE 1
58 61
59 62 /*
60 63 * Field manipulation macros for the drr_versioninfo field of the
61 64 * send stream header.
62 65 */
63 66
64 67 /*
65 68 * Header types for zfs send streams.
66 69 */
67 70 typedef enum drr_headertype {
68 71 DMU_SUBSTREAM = 0x1,
69 72 DMU_COMPOUNDSTREAM = 0x2
70 73 } drr_headertype_t;
71 74
72 75 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2)
73 76 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x)
74 77
75 78 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30)
76 79 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x)
77 80
78 81 /*
79 82 * Feature flags for zfs send streams (flags in drr_versioninfo)
80 83 */
81 84
82 85 #define DMU_BACKUP_FEATURE_DEDUP (0x1)
83 86 #define DMU_BACKUP_FEATURE_DEDUPPROPS (0x2)
84 87 #define DMU_BACKUP_FEATURE_SA_SPILL (0x4)
85 88
86 89 /*
87 90 * Mask of all supported backup features
88 91 */
89 92 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
90 93 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
91 94
92 95 /* Are all features in the given flag word currently supported? */
93 96 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
94 97
95 98 /*
96 99 * The drr_versioninfo field of the dmu_replay_record has the
97 100 * following layout:
98 101 *
99 102 * 64 56 48 40 32 24 16 8 0
100 103 * +-------+-------+-------+-------+-------+-------+-------+-------+
101 104 * | reserved | feature-flags |C|S|
102 105 * +-------+-------+-------+-------+-------+-------+-------+-------+
103 106 *
104 107 * The low order two bits indicate the header type: SUBSTREAM (0x1)
105 108 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical:
106 109 * this field used to be a version number, where the two version types
107 110 * were 1 and 2. Using two bits for this allows earlier versions of
108 111 * the code to be able to recognize send streams that don't use any
109 112 * of the features indicated by feature flags.
110 113 */
111 114
112 115 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
113 116
114 117 #define DRR_FLAG_CLONE (1<<0)
115 118 #define DRR_FLAG_CI_DATA (1<<1)
116 119
117 120 /*
118 121 * flags in the drr_checksumflags field in the DRR_WRITE and
119 122 * DRR_WRITE_BYREF blocks
120 123 */
121 124 #define DRR_CHECKSUM_DEDUP (1<<0)
122 125
123 126 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP)
124 127
125 128 /*
126 129 * zfs ioctl command structure
127 130 */
128 131 typedef struct dmu_replay_record {
129 132 enum {
130 133 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
131 134 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
132 135 DRR_SPILL, DRR_NUMTYPES
133 136 } drr_type;
134 137 uint32_t drr_payloadlen;
135 138 union {
136 139 struct drr_begin {
137 140 uint64_t drr_magic;
138 141 uint64_t drr_versioninfo; /* was drr_version */
139 142 uint64_t drr_creation_time;
140 143 dmu_objset_type_t drr_type;
141 144 uint32_t drr_flags;
142 145 uint64_t drr_toguid;
143 146 uint64_t drr_fromguid;
144 147 char drr_toname[MAXNAMELEN];
145 148 } drr_begin;
146 149 struct drr_end {
147 150 zio_cksum_t drr_checksum;
148 151 uint64_t drr_toguid;
149 152 } drr_end;
150 153 struct drr_object {
151 154 uint64_t drr_object;
152 155 dmu_object_type_t drr_type;
153 156 dmu_object_type_t drr_bonustype;
154 157 uint32_t drr_blksz;
155 158 uint32_t drr_bonuslen;
156 159 uint8_t drr_checksumtype;
157 160 uint8_t drr_compress;
158 161 uint8_t drr_pad[6];
159 162 uint64_t drr_toguid;
160 163 /* bonus content follows */
161 164 } drr_object;
162 165 struct drr_freeobjects {
163 166 uint64_t drr_firstobj;
164 167 uint64_t drr_numobjs;
165 168 uint64_t drr_toguid;
166 169 } drr_freeobjects;
167 170 struct drr_write {
168 171 uint64_t drr_object;
169 172 dmu_object_type_t drr_type;
170 173 uint32_t drr_pad;
171 174 uint64_t drr_offset;
172 175 uint64_t drr_length;
173 176 uint64_t drr_toguid;
174 177 uint8_t drr_checksumtype;
175 178 uint8_t drr_checksumflags;
176 179 uint8_t drr_pad2[6];
177 180 ddt_key_t drr_key; /* deduplication key */
178 181 /* content follows */
179 182 } drr_write;
180 183 struct drr_free {
181 184 uint64_t drr_object;
182 185 uint64_t drr_offset;
183 186 uint64_t drr_length;
184 187 uint64_t drr_toguid;
185 188 } drr_free;
186 189 struct drr_write_byref {
187 190 /* where to put the data */
188 191 uint64_t drr_object;
189 192 uint64_t drr_offset;
190 193 uint64_t drr_length;
191 194 uint64_t drr_toguid;
192 195 /* where to find the prior copy of the data */
193 196 uint64_t drr_refguid;
194 197 uint64_t drr_refobject;
195 198 uint64_t drr_refoffset;
196 199 /* properties of the data */
197 200 uint8_t drr_checksumtype;
198 201 uint8_t drr_checksumflags;
199 202 uint8_t drr_pad2[6];
200 203 ddt_key_t drr_key; /* deduplication key */
201 204 } drr_write_byref;
202 205 struct drr_spill {
203 206 uint64_t drr_object;
204 207 uint64_t drr_length;
205 208 uint64_t drr_toguid;
206 209 uint64_t drr_pad[4]; /* needed for crypto */
207 210 /* spill data follows */
208 211 } drr_spill;
209 212 } drr_u;
210 213 } dmu_replay_record_t;
211 214
212 215 /* diff record range types */
213 216 typedef enum diff_type {
214 217 DDR_NONE = 0x1,
215 218 DDR_INUSE = 0x2,
216 219 DDR_FREE = 0x4
217 220 } diff_type_t;
218 221
219 222 /*
220 223 * The diff reports back ranges of free or in-use objects.
221 224 */
222 225 typedef struct dmu_diff_record {
223 226 uint64_t ddr_type;
224 227 uint64_t ddr_first;
225 228 uint64_t ddr_last;
226 229 } dmu_diff_record_t;
227 230
228 231 typedef struct zinject_record {
229 232 uint64_t zi_objset;
230 233 uint64_t zi_object;
231 234 uint64_t zi_start;
232 235 uint64_t zi_end;
233 236 uint64_t zi_guid;
234 237 uint32_t zi_level;
235 238 uint32_t zi_error;
236 239 uint64_t zi_type;
237 240 uint32_t zi_freq;
238 241 uint32_t zi_failfast;
239 242 char zi_func[MAXNAMELEN];
240 243 uint32_t zi_iotype;
241 244 int32_t zi_duration;
242 245 uint64_t zi_timer;
243 246 uint32_t zi_cmd;
244 247 uint32_t zi_pad;
245 248 } zinject_record_t;
246 249
247 250 #define ZINJECT_NULL 0x1
248 251 #define ZINJECT_FLUSH_ARC 0x2
249 252 #define ZINJECT_UNLOAD_SPA 0x4
250 253
251 254 typedef enum zinject_type {
252 255 ZINJECT_UNINITIALIZED,
253 256 ZINJECT_DATA_FAULT,
254 257 ZINJECT_DEVICE_FAULT,
255 258 ZINJECT_LABEL_FAULT,
256 259 ZINJECT_IGNORED_WRITES,
257 260 ZINJECT_PANIC,
258 261 ZINJECT_DELAY_IO,
259 262 } zinject_type_t;
260 263
261 264 typedef struct zfs_share {
262 265 uint64_t z_exportdata;
263 266 uint64_t z_sharedata;
264 267 uint64_t z_sharetype; /* 0 = share, 1 = unshare */
265 268 uint64_t z_sharemax; /* max length of share string */
266 269 } zfs_share_t;
267 270
268 271 /*
269 272 * ZFS file systems may behave the usual, POSIX-compliant way, where
270 273 * name lookups are case-sensitive. They may also be set up so that
271 274 * all the name lookups are case-insensitive, or so that only some
272 275 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
273 276 */
274 277 typedef enum zfs_case {
275 278 ZFS_CASE_SENSITIVE,
276 279 ZFS_CASE_INSENSITIVE,
277 280 ZFS_CASE_MIXED
278 281 } zfs_case_t;
279 282
280 283 typedef struct zfs_cmd {
281 284 char zc_name[MAXPATHLEN]; /* name of pool or dataset */
282 285 uint64_t zc_nvlist_src; /* really (char *) */
283 286 uint64_t zc_nvlist_src_size;
284 287 uint64_t zc_nvlist_dst; /* really (char *) */
285 288 uint64_t zc_nvlist_dst_size;
286 289 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */
287 290 int zc_pad2;
288 291
289 292 /*
290 293 * The following members are for legacy ioctls which haven't been
291 294 * converted to the new method.
292 295 */
293 296 uint64_t zc_history; /* really (char *) */
294 297 char zc_value[MAXPATHLEN * 2];
295 298 char zc_string[MAXNAMELEN];
296 299 uint64_t zc_guid;
297 300 uint64_t zc_nvlist_conf; /* really (char *) */
298 301 uint64_t zc_nvlist_conf_size;
299 302 uint64_t zc_cookie;
300 303 uint64_t zc_objset_type;
301 304 uint64_t zc_perm_action;
302 305 uint64_t zc_history_len;
303 306 uint64_t zc_history_offset;
304 307 uint64_t zc_obj;
305 308 uint64_t zc_iflags; /* internal to zfs(7fs) */
306 309 zfs_share_t zc_share;
307 310 dmu_objset_stats_t zc_objset_stats;
308 311 struct drr_begin zc_begin_record;
309 312 zinject_record_t zc_inject_record;
310 313 boolean_t zc_defer_destroy;
311 314 boolean_t zc_temphold;
312 315 uint64_t zc_action_handle;
313 316 int zc_cleanup_fd;
314 317 uint8_t zc_pad[4]; /* alignment */
315 318 uint64_t zc_sendobj;
316 319 uint64_t zc_fromobj;
317 320 uint64_t zc_createtxg;
318 321 zfs_stat_t zc_stat;
319 322 } zfs_cmd_t;
320 323
321 324 typedef struct zfs_useracct {
322 325 char zu_domain[256];
323 326 uid_t zu_rid;
324 327 uint32_t zu_pad;
325 328 uint64_t zu_space;
326 329 } zfs_useracct_t;
327 330
328 331 #define ZFSDEV_MAX_MINOR (1 << 16)
329 332 #define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1)
330 333
331 334 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1
332 335
333 336 #ifdef _KERNEL
334 337
335 338 typedef struct zfs_creat {
336 339 nvlist_t *zct_zplprops;
337 340 nvlist_t *zct_props;
338 341 } zfs_creat_t;
339 342
340 343 extern dev_info_t *zfs_dip;
341 344
342 345 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
343 346 extern int zfs_secpolicy_rename_perms(const char *from,
344 347 const char *to, cred_t *cr);
345 348 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
346 349 extern int zfs_busy(void);
347 350 extern void zfs_unmount_snap(const char *);
348 351 extern void zfs_destroy_unmount_origin(const char *);
349 352
350 353 /*
351 354 * ZFS minor numbers can refer to either a control device instance or
352 355 * a zvol. Depending on the value of zss_type, zss_data points to either
353 356 * a zvol_state_t or a zfs_onexit_t.
354 357 */
355 358 enum zfs_soft_state_type {
356 359 ZSST_ZVOL,
357 360 ZSST_CTLDEV
358 361 };
359 362
360 363 typedef struct zfs_soft_state {
361 364 enum zfs_soft_state_type zss_type;
362 365 void *zss_data;
363 366 } zfs_soft_state_t;
364 367
365 368 extern void *zfsdev_get_soft_state(minor_t minor,
366 369 enum zfs_soft_state_type which);
367 370 extern minor_t zfsdev_minor_alloc(void);
368 371
369 372 extern void *zfsdev_state;
370 373 extern kmutex_t zfsdev_state_lock;
371 374
372 375 #endif /* _KERNEL */
373 376
374 377 #ifdef __cplusplus
375 378 }
376 379 #endif
377 380
378 381 #endif /* _SYS_ZFS_IOCTL_H */
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