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4101 metaslab_debug should allow for fine-grained control
4102 space_maps should store more information about themselves
4103 space map object blocksize should be increased
4104 ::spa_space no longer works
4105 removing a mirrored log device results in a leaked object
4106 asynchronously load metaslab
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Sebastien Roy <seb@delphix.com>
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--- old/usr/src/uts/common/fs/zfs/sys/vdev_impl.h
+++ new/usr/src/uts/common/fs/zfs/sys/vdev_impl.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) 2013 by Delphix. All rights reserved.
24 24 */
25 25
26 26 #ifndef _SYS_VDEV_IMPL_H
27 27 #define _SYS_VDEV_IMPL_H
28 28
29 29 #include <sys/avl.h>
30 30 #include <sys/dmu.h>
31 31 #include <sys/metaslab.h>
32 32 #include <sys/nvpair.h>
33 33 #include <sys/space_map.h>
34 34 #include <sys/vdev.h>
35 35 #include <sys/dkio.h>
36 36 #include <sys/uberblock_impl.h>
37 37
38 38 #ifdef __cplusplus
39 39 extern "C" {
40 40 #endif
41 41
42 42 /*
43 43 * Virtual device descriptors.
44 44 *
45 45 * All storage pool operations go through the virtual device framework,
46 46 * which provides data replication and I/O scheduling.
47 47 */
48 48
49 49 /*
50 50 * Forward declarations that lots of things need.
51 51 */
52 52 typedef struct vdev_queue vdev_queue_t;
53 53 typedef struct vdev_cache vdev_cache_t;
54 54 typedef struct vdev_cache_entry vdev_cache_entry_t;
55 55
56 56 /*
57 57 * Virtual device operations
58 58 */
59 59 typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *max_size,
60 60 uint64_t *ashift);
61 61 typedef void vdev_close_func_t(vdev_t *vd);
62 62 typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize);
63 63 typedef int vdev_io_start_func_t(zio_t *zio);
64 64 typedef void vdev_io_done_func_t(zio_t *zio);
65 65 typedef void vdev_state_change_func_t(vdev_t *vd, int, int);
66 66 typedef void vdev_hold_func_t(vdev_t *vd);
67 67 typedef void vdev_rele_func_t(vdev_t *vd);
68 68
69 69 typedef struct vdev_ops {
70 70 vdev_open_func_t *vdev_op_open;
71 71 vdev_close_func_t *vdev_op_close;
72 72 vdev_asize_func_t *vdev_op_asize;
73 73 vdev_io_start_func_t *vdev_op_io_start;
74 74 vdev_io_done_func_t *vdev_op_io_done;
75 75 vdev_state_change_func_t *vdev_op_state_change;
76 76 vdev_hold_func_t *vdev_op_hold;
77 77 vdev_rele_func_t *vdev_op_rele;
78 78 char vdev_op_type[16];
79 79 boolean_t vdev_op_leaf;
80 80 } vdev_ops_t;
81 81
82 82 /*
83 83 * Virtual device properties
84 84 */
85 85 struct vdev_cache_entry {
86 86 char *ve_data;
87 87 uint64_t ve_offset;
88 88 uint64_t ve_lastused;
89 89 avl_node_t ve_offset_node;
90 90 avl_node_t ve_lastused_node;
91 91 uint32_t ve_hits;
92 92 uint16_t ve_missed_update;
93 93 zio_t *ve_fill_io;
94 94 };
95 95
96 96 struct vdev_cache {
97 97 avl_tree_t vc_offset_tree;
98 98 avl_tree_t vc_lastused_tree;
99 99 kmutex_t vc_lock;
100 100 };
101 101
102 102 typedef struct vdev_queue_class {
103 103 uint32_t vqc_active;
104 104
105 105 /*
106 106 * Sorted by offset or timestamp, depending on if the queue is
107 107 * LBA-ordered vs FIFO.
108 108 */
109 109 avl_tree_t vqc_queued_tree;
110 110 } vdev_queue_class_t;
111 111
112 112 struct vdev_queue {
113 113 vdev_t *vq_vdev;
114 114 vdev_queue_class_t vq_class[ZIO_PRIORITY_NUM_QUEUEABLE];
115 115 avl_tree_t vq_active_tree;
116 116 uint64_t vq_last_offset;
117 117 hrtime_t vq_io_complete_ts; /* time last i/o completed */
118 118 kmutex_t vq_lock;
119 119 };
120 120
121 121 /*
122 122 * Virtual device descriptor
123 123 */
124 124 struct vdev {
125 125 /*
126 126 * Common to all vdev types.
127 127 */
128 128 uint64_t vdev_id; /* child number in vdev parent */
129 129 uint64_t vdev_guid; /* unique ID for this vdev */
130 130 uint64_t vdev_guid_sum; /* self guid + all child guids */
131 131 uint64_t vdev_orig_guid; /* orig. guid prior to remove */
132 132 uint64_t vdev_asize; /* allocatable device capacity */
133 133 uint64_t vdev_min_asize; /* min acceptable asize */
134 134 uint64_t vdev_max_asize; /* max acceptable asize */
135 135 uint64_t vdev_ashift; /* block alignment shift */
136 136 uint64_t vdev_state; /* see VDEV_STATE_* #defines */
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137 137 uint64_t vdev_prevstate; /* used when reopening a vdev */
138 138 vdev_ops_t *vdev_ops; /* vdev operations */
139 139 spa_t *vdev_spa; /* spa for this vdev */
140 140 void *vdev_tsd; /* type-specific data */
141 141 vnode_t *vdev_name_vp; /* vnode for pathname */
142 142 vnode_t *vdev_devid_vp; /* vnode for devid */
143 143 vdev_t *vdev_top; /* top-level vdev */
144 144 vdev_t *vdev_parent; /* parent vdev */
145 145 vdev_t **vdev_child; /* array of children */
146 146 uint64_t vdev_children; /* number of children */
147 - space_map_t vdev_dtl[DTL_TYPES]; /* in-core dirty time logs */
148 147 vdev_stat_t vdev_stat; /* virtual device statistics */
149 148 boolean_t vdev_expanding; /* expand the vdev? */
150 149 boolean_t vdev_reopening; /* reopen in progress? */
151 150 int vdev_open_error; /* error on last open */
152 151 kthread_t *vdev_open_thread; /* thread opening children */
153 152 uint64_t vdev_crtxg; /* txg when top-level was added */
154 153
155 154 /*
156 155 * Top-level vdev state.
157 156 */
158 157 uint64_t vdev_ms_array; /* metaslab array object */
159 158 uint64_t vdev_ms_shift; /* metaslab size shift */
160 159 uint64_t vdev_ms_count; /* number of metaslabs */
161 160 metaslab_group_t *vdev_mg; /* metaslab group */
162 161 metaslab_t **vdev_ms; /* metaslab array */
163 162 txg_list_t vdev_ms_list; /* per-txg dirty metaslab lists */
164 163 txg_list_t vdev_dtl_list; /* per-txg dirty DTL lists */
165 164 txg_node_t vdev_txg_node; /* per-txg dirty vdev linkage */
166 165 boolean_t vdev_remove_wanted; /* async remove wanted? */
167 166 boolean_t vdev_probe_wanted; /* async probe wanted? */
168 - uint64_t vdev_removing; /* device is being removed? */
169 167 list_node_t vdev_config_dirty_node; /* config dirty list */
170 168 list_node_t vdev_state_dirty_node; /* state dirty list */
171 169 uint64_t vdev_deflate_ratio; /* deflation ratio (x512) */
172 170 uint64_t vdev_islog; /* is an intent log device */
173 - uint64_t vdev_ishole; /* is a hole in the namespace */
171 + uint64_t vdev_removing; /* device is being removed? */
172 + boolean_t vdev_ishole; /* is a hole in the namespace */
174 173
175 174 /*
176 175 * Leaf vdev state.
177 176 */
178 - uint64_t vdev_psize; /* physical device capacity */
179 - space_map_obj_t vdev_dtl_smo; /* dirty time log space map obj */
177 + range_tree_t *vdev_dtl[DTL_TYPES]; /* dirty time logs */
178 + space_map_t *vdev_dtl_sm; /* dirty time log space map */
180 179 txg_node_t vdev_dtl_node; /* per-txg dirty DTL linkage */
180 + uint64_t vdev_dtl_object; /* DTL object */
181 + uint64_t vdev_psize; /* physical device capacity */
181 182 uint64_t vdev_wholedisk; /* true if this is a whole disk */
182 183 uint64_t vdev_offline; /* persistent offline state */
183 184 uint64_t vdev_faulted; /* persistent faulted state */
184 185 uint64_t vdev_degraded; /* persistent degraded state */
185 186 uint64_t vdev_removed; /* persistent removed state */
186 187 uint64_t vdev_resilver_txg; /* persistent resilvering state */
187 188 uint64_t vdev_nparity; /* number of parity devices for raidz */
188 189 char *vdev_path; /* vdev path (if any) */
189 190 char *vdev_devid; /* vdev devid (if any) */
190 191 char *vdev_physpath; /* vdev device path (if any) */
191 192 char *vdev_fru; /* physical FRU location */
192 193 uint64_t vdev_not_present; /* not present during import */
193 194 uint64_t vdev_unspare; /* unspare when resilvering done */
194 - hrtime_t vdev_last_try; /* last reopen time */
195 195 boolean_t vdev_nowritecache; /* true if flushwritecache failed */
196 196 boolean_t vdev_checkremove; /* temporary online test */
197 197 boolean_t vdev_forcefault; /* force online fault */
198 198 boolean_t vdev_splitting; /* split or repair in progress */
199 199 boolean_t vdev_delayed_close; /* delayed device close? */
200 - uint8_t vdev_tmpoffline; /* device taken offline temporarily? */
201 - uint8_t vdev_detached; /* device detached? */
202 - uint8_t vdev_cant_read; /* vdev is failing all reads */
203 - uint8_t vdev_cant_write; /* vdev is failing all writes */
204 - uint64_t vdev_isspare; /* was a hot spare */
205 - uint64_t vdev_isl2cache; /* was a l2cache device */
200 + boolean_t vdev_tmpoffline; /* device taken offline temporarily? */
201 + boolean_t vdev_detached; /* device detached? */
202 + boolean_t vdev_cant_read; /* vdev is failing all reads */
203 + boolean_t vdev_cant_write; /* vdev is failing all writes */
204 + boolean_t vdev_isspare; /* was a hot spare */
205 + boolean_t vdev_isl2cache; /* was a l2cache device */
206 206 vdev_queue_t vdev_queue; /* I/O deadline schedule queue */
207 207 vdev_cache_t vdev_cache; /* physical block cache */
208 208 spa_aux_vdev_t *vdev_aux; /* for l2cache vdevs */
209 209 zio_t *vdev_probe_zio; /* root of current probe */
210 210 vdev_aux_t vdev_label_aux; /* on-disk aux state */
211 211
212 212 /*
213 213 * For DTrace to work in userland (libzpool) context, these fields must
214 214 * remain at the end of the structure. DTrace will use the kernel's
215 215 * CTF definition for 'struct vdev', and since the size of a kmutex_t is
216 216 * larger in userland, the offsets for the rest of the fields would be
217 217 * incorrect.
218 218 */
219 219 kmutex_t vdev_dtl_lock; /* vdev_dtl_{map,resilver} */
220 220 kmutex_t vdev_stat_lock; /* vdev_stat */
221 221 kmutex_t vdev_probe_lock; /* protects vdev_probe_zio */
222 222 };
223 223
224 224 #define VDEV_RAIDZ_MAXPARITY 3
225 225
226 226 #define VDEV_PAD_SIZE (8 << 10)
227 227 /* 2 padding areas (vl_pad1 and vl_pad2) to skip */
228 228 #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2
229 229 #define VDEV_PHYS_SIZE (112 << 10)
230 230 #define VDEV_UBERBLOCK_RING (128 << 10)
231 231
232 232 #define VDEV_UBERBLOCK_SHIFT(vd) \
233 233 MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT)
234 234 #define VDEV_UBERBLOCK_COUNT(vd) \
235 235 (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd))
236 236 #define VDEV_UBERBLOCK_OFFSET(vd, n) \
237 237 offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)])
238 238 #define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd))
239 239
240 240 typedef struct vdev_phys {
241 241 char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)];
242 242 zio_eck_t vp_zbt;
243 243 } vdev_phys_t;
244 244
245 245 typedef struct vdev_label {
246 246 char vl_pad1[VDEV_PAD_SIZE]; /* 8K */
247 247 char vl_pad2[VDEV_PAD_SIZE]; /* 8K */
248 248 vdev_phys_t vl_vdev_phys; /* 112K */
249 249 char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
250 250 } vdev_label_t; /* 256K total */
251 251
252 252 /*
253 253 * vdev_dirty() flags
254 254 */
255 255 #define VDD_METASLAB 0x01
256 256 #define VDD_DTL 0x02
257 257
258 258 /* Offset of embedded boot loader region on each label */
259 259 #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t))
260 260 /*
261 261 * Size of embedded boot loader region on each label.
262 262 * The total size of the first two labels plus the boot area is 4MB.
263 263 */
264 264 #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
265 265
266 266 /*
267 267 * Size of label regions at the start and end of each leaf device.
268 268 */
269 269 #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
270 270 #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t))
271 271 #define VDEV_LABELS 4
272 272 #define VDEV_BEST_LABEL VDEV_LABELS
273 273
274 274 #define VDEV_ALLOC_LOAD 0
275 275 #define VDEV_ALLOC_ADD 1
276 276 #define VDEV_ALLOC_SPARE 2
277 277 #define VDEV_ALLOC_L2CACHE 3
278 278 #define VDEV_ALLOC_ROOTPOOL 4
279 279 #define VDEV_ALLOC_SPLIT 5
280 280 #define VDEV_ALLOC_ATTACH 6
281 281
282 282 /*
283 283 * Allocate or free a vdev
284 284 */
285 285 extern vdev_t *vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid,
286 286 vdev_ops_t *ops);
287 287 extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config,
288 288 vdev_t *parent, uint_t id, int alloctype);
289 289 extern void vdev_free(vdev_t *vd);
290 290
291 291 /*
292 292 * Add or remove children and parents
293 293 */
294 294 extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd);
295 295 extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd);
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296 296 extern void vdev_compact_children(vdev_t *pvd);
297 297 extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops);
298 298 extern void vdev_remove_parent(vdev_t *cvd);
299 299
300 300 /*
301 301 * vdev sync load and sync
302 302 */
303 303 extern void vdev_load_log_state(vdev_t *nvd, vdev_t *ovd);
304 304 extern boolean_t vdev_log_state_valid(vdev_t *vd);
305 305 extern void vdev_load(vdev_t *vd);
306 +extern int vdev_dtl_load(vdev_t *vd);
306 307 extern void vdev_sync(vdev_t *vd, uint64_t txg);
307 308 extern void vdev_sync_done(vdev_t *vd, uint64_t txg);
308 309 extern void vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg);
310 +extern void vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg);
309 311
310 312 /*
311 313 * Available vdev types.
312 314 */
313 315 extern vdev_ops_t vdev_root_ops;
314 316 extern vdev_ops_t vdev_mirror_ops;
315 317 extern vdev_ops_t vdev_replacing_ops;
316 318 extern vdev_ops_t vdev_raidz_ops;
317 319 extern vdev_ops_t vdev_disk_ops;
318 320 extern vdev_ops_t vdev_file_ops;
319 321 extern vdev_ops_t vdev_missing_ops;
320 322 extern vdev_ops_t vdev_hole_ops;
321 323 extern vdev_ops_t vdev_spare_ops;
322 324
323 325 /*
324 326 * Common size functions
325 327 */
326 328 extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize);
327 329 extern uint64_t vdev_get_min_asize(vdev_t *vd);
328 330 extern void vdev_set_min_asize(vdev_t *vd);
329 331
330 332 /*
331 333 * Global variables
332 334 */
333 335 /* zdb uses this tunable, so it must be declared here to make lint happy. */
334 336 extern int zfs_vdev_cache_size;
335 337
336 338 /*
337 339 * The vdev_buf_t is used to translate between zio_t and buf_t, and back again.
338 340 */
339 341 typedef struct vdev_buf {
340 342 buf_t vb_buf; /* buffer that describes the io */
341 343 zio_t *vb_io; /* pointer back to the original zio_t */
342 344 } vdev_buf_t;
343 345
344 346 #ifdef __cplusplus
345 347 }
346 348 #endif
347 349
348 350 #endif /* _SYS_VDEV_IMPL_H */
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