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 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #ifndef _SYS_DSL_DIR_H
27 #define _SYS_DSL_DIR_H
29 #pragma ident "@(#)dsl_dir.h 1.10 07/10/29 SMI"
32 #include <sys/dsl_pool.h>
33 #include <sys/dsl_synctask.h>
34 #include <sys/refcount.h>
35 #include <sys/zfs_context.h>
43 typedef struct dsl_dir_phys {
44 uint64_t dd_creation_time; /* not actually used */
45 uint64_t dd_head_dataset_obj;
46 uint64_t dd_parent_obj;
47 uint64_t dd_origin_obj;
48 uint64_t dd_child_dir_zapobj;
50 * how much space our children are accounting for; for leaf
51 * datasets, == physical space used by fs + snaps
53 uint64_t dd_used_bytes;
54 uint64_t dd_compressed_bytes;
55 uint64_t dd_uncompressed_bytes;
56 /* Administrative quota setting */
58 /* Administrative reservation setting */
60 uint64_t dd_props_zapobj;
61 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
62 uint64_t dd_pad[20]; /* pad out to 256 bytes for good measure */
66 /* These are immutable; no lock needed: */
68 dsl_dir_phys_t *dd_phys;
72 /* protected by lock on pool's dp_dirty_dirs list */
73 txg_node_t dd_dirty_link;
75 /* protected by dp_config_rwlock */
78 /* Protected by dd_lock */
80 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */
83 /* reflects any changes to dd_phys->dd_used_bytes made this syncing */
84 int64_t dd_used_bytes;
85 /* gross estimate of space used by in-flight tx's */
86 uint64_t dd_tempreserved[TXG_SIZE];
87 /* amount of space we expect to write; == amount of dirty data */
88 int64_t dd_space_towrite[TXG_SIZE];
90 /* protected by dd_lock; keep at end of struct for better locality */
91 char dd_myname[MAXNAMELEN];
94 void dsl_dir_close(dsl_dir_t *dd, void *tag);
95 int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail);
96 int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **,
98 int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj,
99 const char *tail, void *tag, dsl_dir_t **);
100 void dsl_dir_name(dsl_dir_t *dd, char *buf);
101 int dsl_dir_namelen(dsl_dir_t *dd);
102 int dsl_dir_is_private(dsl_dir_t *dd);
103 uint64_t dsl_dir_create_sync(dsl_dir_t *pds, const char *name, dmu_tx_t *tx);
104 void dsl_dir_create_root(objset_t *mos, uint64_t *ddobjp, dmu_tx_t *tx);
105 dsl_checkfunc_t dsl_dir_destroy_check;
106 dsl_syncfunc_t dsl_dir_destroy_sync;
107 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
108 uint64_t dsl_dir_space_available(dsl_dir_t *dd,
109 dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
110 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
111 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
112 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
113 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep,
115 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
116 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
117 void dsl_dir_diduse_space(dsl_dir_t *dd,
118 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
119 int dsl_dir_set_quota(const char *ddname, uint64_t quota);
120 int dsl_dir_set_reservation(const char *ddname, uint64_t reservation);
121 int dsl_dir_rename(dsl_dir_t *dd, const char *newname);
122 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space);
123 int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx);
125 /* internal reserved dir name */
126 #define MOS_DIR_NAME "$MOS"
129 #define dprintf_dd(dd, fmt, ...) do { \
130 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
131 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \
133 dsl_dir_name(dd, __ds_name); \
134 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
135 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \
137 _NOTE(CONSTCOND) } while (0)
139 #define dprintf_dd(dd, fmt, ...)
146 #endif /* _SYS_DSL_DIR_H */