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