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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
24 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
28 #ifndef _SYS_DSL_DIR_H
29 #define _SYS_DSL_DIR_H
32 #include <sys/dsl_deadlist.h>
33 #include <sys/dsl_pool.h>
34 #include <sys/dsl_synctask.h>
35 #include <sys/refcount.h>
36 #include <sys/zfs_context.h>
37 #include <sys/dsl_crypt.h>
38 #include <sys/bplist.h>
47 * DD_FIELD_* are strings that are used in the "extensified" dsl_dir zap object.
48 * They should be of the format <reverse-dns>:<field>.
51 #define DD_FIELD_FILESYSTEM_COUNT "com.joyent:filesystem_count"
52 #define DD_FIELD_SNAPSHOT_COUNT "com.joyent:snapshot_count"
53 #define DD_FIELD_CRYPTO_KEY_OBJ "com.datto:crypto_key_obj"
54 #define DD_FIELD_LIVELIST "com.delphix:livelist"
56 typedef enum dd_used {
65 #define DD_FLAG_USED_BREAKDOWN (1<<0)
67 typedef struct dsl_dir_phys {
68 uint64_t dd_creation_time; /* not actually used */
69 uint64_t dd_head_dataset_obj;
70 uint64_t dd_parent_obj;
71 uint64_t dd_origin_obj;
72 uint64_t dd_child_dir_zapobj;
74 * how much space our children are accounting for; for leaf
75 * datasets, == physical space used by fs + snaps
77 uint64_t dd_used_bytes;
78 uint64_t dd_compressed_bytes;
79 uint64_t dd_uncompressed_bytes;
80 /* Administrative quota setting */
82 /* Administrative reservation setting */
84 uint64_t dd_props_zapobj;
85 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
87 uint64_t dd_used_breakdown[DD_USED_NUM];
88 uint64_t dd_clones; /* dsl_dir objects */
89 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */
93 dmu_buf_user_t dd_dbu;
95 /* These are immutable; no lock needed: */
97 uint64_t dd_crypto_obj;
100 /* Stable until user eviction; no lock needed: */
103 /* protected by lock on pool's dp_dirty_dirs list */
104 txg_node_t dd_dirty_link;
106 /* protected by dp_config_rwlock */
107 dsl_dir_t *dd_parent;
109 /* Protected by dd_lock */
111 list_t dd_props; /* list of dsl_prop_record_t's */
112 inode_timespec_t dd_snap_cmtime; /* last snapshot namespace change */
113 uint64_t dd_origin_txg;
115 /* gross estimate of space used by in-flight tx's */
116 uint64_t dd_tempreserved[TXG_SIZE];
117 /* amount of space we expect to write; == amount of dirty data */
118 int64_t dd_space_towrite[TXG_SIZE];
120 dsl_deadlist_t dd_livelist;
121 bplist_t dd_pending_frees;
122 bplist_t dd_pending_allocs;
124 /* protected by dd_lock; keep at end of struct for better locality */
125 char dd_myname[ZFS_MAX_DATASET_NAME_LEN];
128 static inline dsl_dir_phys_t *
129 dsl_dir_phys(dsl_dir_t *dd)
131 return (dd->dd_dbuf->db_data);
134 void dsl_dir_rele(dsl_dir_t *dd, void *tag);
135 void dsl_dir_async_rele(dsl_dir_t *dd, void *tag);
136 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag,
137 dsl_dir_t **, const char **tail);
138 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj,
139 const char *tail, void *tag, dsl_dir_t **);
140 void dsl_dir_name(dsl_dir_t *dd, char *buf);
141 int dsl_dir_namelen(dsl_dir_t *dd);
142 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
143 const char *name, dmu_tx_t *tx);
145 uint64_t dsl_dir_get_used(dsl_dir_t *dd);
146 uint64_t dsl_dir_get_compressed(dsl_dir_t *dd);
147 uint64_t dsl_dir_get_quota(dsl_dir_t *dd);
148 uint64_t dsl_dir_get_reservation(dsl_dir_t *dd);
149 uint64_t dsl_dir_get_compressratio(dsl_dir_t *dd);
150 uint64_t dsl_dir_get_logicalused(dsl_dir_t *dd);
151 uint64_t dsl_dir_get_usedsnap(dsl_dir_t *dd);
152 uint64_t dsl_dir_get_usedds(dsl_dir_t *dd);
153 uint64_t dsl_dir_get_usedrefreserv(dsl_dir_t *dd);
154 uint64_t dsl_dir_get_usedchild(dsl_dir_t *dd);
155 void dsl_dir_get_origin(dsl_dir_t *dd, char *buf);
156 int dsl_dir_get_filesystem_count(dsl_dir_t *dd, uint64_t *count);
157 int dsl_dir_get_snapshot_count(dsl_dir_t *dd, uint64_t *count);
159 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
160 uint64_t dsl_dir_space_available(dsl_dir_t *dd,
161 dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
162 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
163 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
164 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
165 uint64_t asize, boolean_t netfree, void **tr_cookiep, dmu_tx_t *tx);
166 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
167 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
168 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
169 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
170 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
171 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
172 int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
174 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
175 uint64_t reservation);
176 int dsl_dir_activate_fs_ss_limit(const char *);
177 int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *,
179 void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *);
180 int dsl_dir_rename(const char *oldname, const char *newname);
181 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd,
182 uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *);
183 boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
184 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
185 uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
186 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
187 inode_timespec_t dsl_dir_snap_cmtime(dsl_dir_t *dd);
188 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value,
190 void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx);
191 boolean_t dsl_dir_is_zapified(dsl_dir_t *dd);
192 void dsl_dir_livelist_open(dsl_dir_t *dd, uint64_t obj);
193 void dsl_dir_livelist_close(dsl_dir_t *dd);
194 void dsl_dir_remove_livelist(dsl_dir_t *dd, dmu_tx_t *tx, boolean_t total);
196 /* internal reserved dir name */
197 #define MOS_DIR_NAME "$MOS"
198 #define ORIGIN_DIR_NAME "$ORIGIN"
199 #define FREE_DIR_NAME "$FREE"
200 #define LEAK_DIR_NAME "$LEAK"
203 #define dprintf_dd(dd, fmt, ...) do { \
204 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
205 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
206 dsl_dir_name(dd, __ds_name); \
207 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
208 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
210 _NOTE(CONSTCOND) } while (0)
212 #define dprintf_dd(dd, fmt, ...)
219 #endif /* _SYS_DSL_DIR_H */