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1693 persistent 'comment' field for a zpool
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--- old/usr/src/uts/common/fs/zfs/sys/spa_impl.h
+++ new/usr/src/uts/common/fs/zfs/sys/spa_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 *
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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 + * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 24 * Copyright (c) 2011 by Delphix. All rights reserved.
24 25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 26 */
26 27
27 28 #ifndef _SYS_SPA_IMPL_H
28 29 #define _SYS_SPA_IMPL_H
29 30
30 31 #include <sys/spa.h>
31 32 #include <sys/vdev.h>
32 33 #include <sys/metaslab.h>
33 34 #include <sys/dmu.h>
34 35 #include <sys/dsl_pool.h>
35 36 #include <sys/uberblock_impl.h>
36 37 #include <sys/zfs_context.h>
37 38 #include <sys/avl.h>
38 39 #include <sys/refcount.h>
39 40 #include <sys/bplist.h>
40 41 #include <sys/bpobj.h>
41 42
42 43 #ifdef __cplusplus
43 44 extern "C" {
44 45 #endif
45 46
46 47 typedef struct spa_error_entry {
47 48 zbookmark_t se_bookmark;
48 49 char *se_name;
49 50 avl_node_t se_avl;
50 51 } spa_error_entry_t;
51 52
52 53 typedef struct spa_history_phys {
53 54 uint64_t sh_pool_create_len; /* ending offset of zpool create */
54 55 uint64_t sh_phys_max_off; /* physical EOF */
55 56 uint64_t sh_bof; /* logical BOF */
56 57 uint64_t sh_eof; /* logical EOF */
57 58 uint64_t sh_records_lost; /* num of records overwritten */
58 59 } spa_history_phys_t;
59 60
60 61 struct spa_aux_vdev {
61 62 uint64_t sav_object; /* MOS object for device list */
62 63 nvlist_t *sav_config; /* cached device config */
63 64 vdev_t **sav_vdevs; /* devices */
64 65 int sav_count; /* number devices */
65 66 boolean_t sav_sync; /* sync the device list */
66 67 nvlist_t **sav_pending; /* pending device additions */
67 68 uint_t sav_npending; /* # pending devices */
68 69 };
69 70
70 71 typedef struct spa_config_lock {
71 72 kmutex_t scl_lock;
72 73 kthread_t *scl_writer;
73 74 int scl_write_wanted;
74 75 kcondvar_t scl_cv;
75 76 refcount_t scl_count;
76 77 } spa_config_lock_t;
77 78
78 79 typedef struct spa_config_dirent {
79 80 list_node_t scd_link;
80 81 char *scd_path;
81 82 } spa_config_dirent_t;
82 83
83 84 enum zio_taskq_type {
84 85 ZIO_TASKQ_ISSUE = 0,
85 86 ZIO_TASKQ_ISSUE_HIGH,
86 87 ZIO_TASKQ_INTERRUPT,
87 88 ZIO_TASKQ_INTERRUPT_HIGH,
88 89 ZIO_TASKQ_TYPES
89 90 };
90 91
91 92 /*
92 93 * State machine for the zpool-pooname process. The states transitions
93 94 * are done as follows:
94 95 *
95 96 * From To Routine
96 97 * PROC_NONE -> PROC_CREATED spa_activate()
97 98 * PROC_CREATED -> PROC_ACTIVE spa_thread()
98 99 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate()
99 100 * PROC_DEACTIVATE -> PROC_GONE spa_thread()
100 101 * PROC_GONE -> PROC_NONE spa_deactivate()
101 102 */
102 103 typedef enum spa_proc_state {
103 104 SPA_PROC_NONE, /* spa_proc = &p0, no process created */
104 105 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */
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105 106 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */
106 107 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */
107 108 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */
108 109 } spa_proc_state_t;
109 110
110 111 struct spa {
111 112 /*
112 113 * Fields protected by spa_namespace_lock.
113 114 */
114 115 char spa_name[MAXNAMELEN]; /* pool name */
116 + char *spa_comment; /* comment */
115 117 avl_node_t spa_avl; /* node in spa_namespace_avl */
116 118 nvlist_t *spa_config; /* last synced config */
117 119 nvlist_t *spa_config_syncing; /* currently syncing config */
118 120 nvlist_t *spa_config_splitting; /* config for splitting */
119 121 nvlist_t *spa_load_info; /* info and errors from load */
120 122 uint64_t spa_config_txg; /* txg of last config change */
121 123 int spa_sync_pass; /* iterate-to-convergence */
122 124 pool_state_t spa_state; /* pool state */
123 125 int spa_inject_ref; /* injection references */
124 126 uint8_t spa_sync_on; /* sync threads are running */
125 127 spa_load_state_t spa_load_state; /* current load operation */
126 128 uint64_t spa_import_flags; /* import specific flags */
127 129 taskq_t *spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
128 130 dsl_pool_t *spa_dsl_pool;
129 131 metaslab_class_t *spa_normal_class; /* normal data class */
130 132 metaslab_class_t *spa_log_class; /* intent log data class */
131 133 uint64_t spa_first_txg; /* first txg after spa_open() */
132 134 uint64_t spa_final_txg; /* txg of export/destroy */
133 135 uint64_t spa_freeze_txg; /* freeze pool at this txg */
134 136 uint64_t spa_load_max_txg; /* best initial ub_txg */
135 137 uint64_t spa_claim_max_txg; /* highest claimed birth txg */
136 138 timespec_t spa_loaded_ts; /* 1st successful open time */
137 139 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */
138 140 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */
139 141 vdev_t *spa_root_vdev; /* top-level vdev container */
140 142 uint64_t spa_config_guid; /* config pool guid */
141 143 uint64_t spa_load_guid; /* spa_load initialized guid */
142 144 list_t spa_config_dirty_list; /* vdevs with dirty config */
143 145 list_t spa_state_dirty_list; /* vdevs with dirty state */
144 146 spa_aux_vdev_t spa_spares; /* hot spares */
145 147 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */
146 148 uint64_t spa_config_object; /* MOS object for pool config */
147 149 uint64_t spa_config_generation; /* config generation number */
148 150 uint64_t spa_syncing_txg; /* txg currently syncing */
149 151 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */
150 152 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
151 153 uberblock_t spa_ubsync; /* last synced uberblock */
152 154 uberblock_t spa_uberblock; /* current uberblock */
153 155 boolean_t spa_extreme_rewind; /* rewind past deferred frees */
154 156 uint64_t spa_last_io; /* lbolt of last non-scan I/O */
155 157 kmutex_t spa_scrub_lock; /* resilver/scrub lock */
156 158 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */
157 159 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */
158 160 uint8_t spa_scrub_active; /* active or suspended? */
159 161 uint8_t spa_scrub_type; /* type of scrub we're doing */
160 162 uint8_t spa_scrub_finished; /* indicator to rotate logs */
161 163 uint8_t spa_scrub_started; /* started since last boot */
162 164 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */
163 165 uint64_t spa_scan_pass_start; /* start time per pass/reboot */
164 166 uint64_t spa_scan_pass_exam; /* examined bytes per pass */
165 167 kmutex_t spa_async_lock; /* protect async state */
166 168 kthread_t *spa_async_thread; /* thread doing async task */
167 169 int spa_async_suspended; /* async tasks suspended */
168 170 kcondvar_t spa_async_cv; /* wait for thread_exit() */
169 171 uint16_t spa_async_tasks; /* async task mask */
170 172 char *spa_root; /* alternate root directory */
171 173 uint64_t spa_ena; /* spa-wide ereport ENA */
172 174 int spa_last_open_failed; /* error if last open failed */
173 175 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */
174 176 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */
175 177 uint64_t spa_load_txg; /* ub txg that loaded */
176 178 uint64_t spa_load_txg_ts; /* timestamp from that ub */
177 179 uint64_t spa_load_meta_errors; /* verify metadata err count */
178 180 uint64_t spa_load_data_errors; /* verify data err count */
179 181 uint64_t spa_verify_min_txg; /* start txg of verify scrub */
180 182 kmutex_t spa_errlog_lock; /* error log lock */
181 183 uint64_t spa_errlog_last; /* last error log object */
182 184 uint64_t spa_errlog_scrub; /* scrub error log object */
183 185 kmutex_t spa_errlist_lock; /* error list/ereport lock */
184 186 avl_tree_t spa_errlist_last; /* last error list */
185 187 avl_tree_t spa_errlist_scrub; /* scrub error list */
186 188 uint64_t spa_deflate; /* should we deflate? */
187 189 uint64_t spa_history; /* history object */
188 190 kmutex_t spa_history_lock; /* history lock */
189 191 vdev_t *spa_pending_vdev; /* pending vdev additions */
190 192 kmutex_t spa_props_lock; /* property lock */
191 193 uint64_t spa_pool_props_object; /* object for properties */
192 194 uint64_t spa_bootfs; /* default boot filesystem */
193 195 uint64_t spa_failmode; /* failure mode for the pool */
194 196 uint64_t spa_delegation; /* delegation on/off */
195 197 list_t spa_config_list; /* previous cache file(s) */
196 198 zio_t *spa_async_zio_root; /* root of all async I/O */
197 199 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */
198 200 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */
199 201 kcondvar_t spa_suspend_cv; /* notification of resume */
200 202 uint8_t spa_suspended; /* pool is suspended */
201 203 uint8_t spa_claiming; /* pool is doing zil_claim() */
202 204 boolean_t spa_debug; /* debug enabled? */
203 205 boolean_t spa_is_root; /* pool is root */
204 206 int spa_minref; /* num refs when first opened */
205 207 int spa_mode; /* FREAD | FWRITE */
206 208 spa_log_state_t spa_log_state; /* log state */
207 209 uint64_t spa_autoexpand; /* lun expansion on/off */
208 210 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
209 211 uint64_t spa_ddt_stat_object; /* DDT statistics */
210 212 uint64_t spa_dedup_ditto; /* dedup ditto threshold */
211 213 uint64_t spa_dedup_checksum; /* default dedup checksum */
212 214 uint64_t spa_dspace; /* dspace in normal class */
213 215 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */
214 216 kmutex_t spa_proc_lock; /* protects spa_proc* */
215 217 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */
216 218 spa_proc_state_t spa_proc_state; /* see definition */
217 219 struct proc *spa_proc; /* "zpool-poolname" process */
218 220 uint64_t spa_did; /* if procp != p0, did of t1 */
219 221 boolean_t spa_autoreplace; /* autoreplace set in open */
220 222 int spa_vdev_locks; /* locks grabbed */
221 223 uint64_t spa_creation_version; /* version at pool creation */
222 224 uint64_t spa_prev_software_version;
223 225 /*
224 226 * spa_refcnt & spa_config_lock must be the last elements
225 227 * because refcount_t changes size based on compilation options.
226 228 * In order for the MDB module to function correctly, the other
227 229 * fields must remain in the same location.
228 230 */
229 231 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
230 232 refcount_t spa_refcount; /* number of opens */
231 233 };
232 234
233 235 extern const char *spa_config_path;
234 236
235 237 #ifdef __cplusplus
236 238 }
237 239 #endif
238 240
239 241 #endif /* _SYS_SPA_IMPL_H */
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