include/sys/dsl_dir.h

   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 (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.
  26  */
  27
  28 #ifndef _SYS_DSL_DIR_H
  29 #define _SYS_DSL_DIR_H
  30
  31 #include <sys/dmu.h>
  32 #include <sys/dsl_deadlist.h>
  33 #include <sys/dsl_pool.h>
  34 #include <sys/dsl_synctask.h>
  35 #include <sys/zfs_refcount.h>
  36 #include <sys/zfs_context.h>
  37 #include <sys/dsl_crypt.h>
  38 #include <sys/bplist.h>
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 struct dsl_dataset;
  45 struct zthr;
  46 /*
  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>.
  49  */
  50
  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"
  55
  56 typedef enum dd_used {
  57         DD_USED_HEAD,
  58         DD_USED_SNAP,
  59         DD_USED_CHILD,
  60         DD_USED_CHILD_RSRV,
  61         DD_USED_REFRSRV,
  62         DD_USED_NUM
  63 } dd_used_t;
  64
  65 #define DD_FLAG_USED_BREAKDOWN (1<<0)
  66
  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;
  73         /*
  74          * how much space our children are accounting for; for leaf
  75          * datasets, == physical space used by fs + snaps
  76          */
  77         uint64_t dd_used_bytes;
  78         uint64_t dd_compressed_bytes;
  79         uint64_t dd_uncompressed_bytes;
  80         /* Administrative quota setting */
  81         uint64_t dd_quota;
  82         /* Administrative reservation setting */
  83         uint64_t dd_reserved;
  84         uint64_t dd_props_zapobj;
  85         uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
  86         uint64_t dd_flags;
  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 */
  90 } dsl_dir_phys_t;
  91
  92 struct dsl_dir {
  93         dmu_buf_user_t dd_dbu;
  94
  95         /* These are immutable; no lock needed: */
  96         uint64_t dd_object;
  97         uint64_t dd_crypto_obj;
  98         dsl_pool_t *dd_pool;
  99
 100         /* Stable until user eviction; no lock needed: */
 101         dmu_buf_t *dd_dbuf;
 102
 103         /* protected by lock on pool's dp_dirty_dirs list */
 104         txg_node_t dd_dirty_link;
 105
 106         /* protected by dp_config_rwlock */
 107         dsl_dir_t *dd_parent;
 108
 109         /* Protected by dd_lock */
 110         kmutex_t 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;
 114
 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];
 119
 120         dsl_deadlist_t dd_livelist;
 121         bplist_t dd_pending_frees;
 122         bplist_t dd_pending_allocs;
 123
 124         kmutex_t dd_activity_lock;
 125         kcondvar_t dd_activity_cv;
 126         boolean_t dd_activity_cancelled;
 127         uint64_t dd_activity_waiters;
 128
 129         /* protected by dd_lock; keep at end of struct for better locality */
 130         char dd_myname[ZFS_MAX_DATASET_NAME_LEN];
 131 };
 132
 133 static inline dsl_dir_phys_t *
 134 dsl_dir_phys(dsl_dir_t *dd)
 135 {
 136         return (dd->dd_dbuf->db_data);
 137 }
 138
 139 void dsl_dir_rele(dsl_dir_t *dd, void *tag);
 140 void dsl_dir_async_rele(dsl_dir_t *dd, void *tag);
 141 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag,
 142     dsl_dir_t **, const char **tail);
 143 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj,
 144     const char *tail, void *tag, dsl_dir_t **);
 145 void dsl_dir_name(dsl_dir_t *dd, char *buf);
 146 int dsl_dir_namelen(dsl_dir_t *dd);
 147 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
 148     const char *name, dmu_tx_t *tx);
 149
 150 uint64_t dsl_dir_get_used(dsl_dir_t *dd);
 151 uint64_t dsl_dir_get_compressed(dsl_dir_t *dd);
 152 uint64_t dsl_dir_get_quota(dsl_dir_t *dd);
 153 uint64_t dsl_dir_get_reservation(dsl_dir_t *dd);
 154 uint64_t dsl_dir_get_compressratio(dsl_dir_t *dd);
 155 uint64_t dsl_dir_get_logicalused(dsl_dir_t *dd);
 156 uint64_t dsl_dir_get_usedsnap(dsl_dir_t *dd);
 157 uint64_t dsl_dir_get_usedds(dsl_dir_t *dd);
 158 uint64_t dsl_dir_get_usedrefreserv(dsl_dir_t *dd);
 159 uint64_t dsl_dir_get_usedchild(dsl_dir_t *dd);
 160 void dsl_dir_get_origin(dsl_dir_t *dd, char *buf);
 161 int dsl_dir_get_filesystem_count(dsl_dir_t *dd, uint64_t *count);
 162 int dsl_dir_get_snapshot_count(dsl_dir_t *dd, uint64_t *count);
 163
 164 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
 165 uint64_t dsl_dir_space_available(dsl_dir_t *dd,
 166     dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
 167 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
 168 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
 169 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
 170     uint64_t asize, boolean_t netfree, void **tr_cookiep, dmu_tx_t *tx);
 171 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
 172 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
 173 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
 174     int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
 175 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
 176     dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
 177 int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
 178     uint64_t quota);
 179 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
 180     uint64_t reservation);
 181 int dsl_dir_activate_fs_ss_limit(const char *);
 182 int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *,
 183     cred_t *, proc_t *);
 184 void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *);
 185 int dsl_dir_rename(const char *oldname, const char *newname);
 186 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd,
 187     uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *, proc_t *);
 188 boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
 189 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
 190     uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
 191 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
 192 inode_timespec_t dsl_dir_snap_cmtime(dsl_dir_t *dd);
 193 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value,
 194     dmu_tx_t *tx);
 195 void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx);
 196 boolean_t dsl_dir_is_zapified(dsl_dir_t *dd);
 197 void dsl_dir_livelist_open(dsl_dir_t *dd, uint64_t obj);
 198 void dsl_dir_livelist_close(dsl_dir_t *dd);
 199 void dsl_dir_remove_livelist(dsl_dir_t *dd, dmu_tx_t *tx, boolean_t total);
 200 int dsl_dir_wait(dsl_dir_t *dd, dsl_dataset_t *ds, zfs_wait_activity_t activity,
 201     boolean_t *waited);
 202 void dsl_dir_cancel_waiters(dsl_dir_t *dd);
 203
 204 /* internal reserved dir name */
 205 #define MOS_DIR_NAME "$MOS"
 206 #define ORIGIN_DIR_NAME "$ORIGIN"
 207 #define FREE_DIR_NAME "$FREE"
 208 #define LEAK_DIR_NAME "$LEAK"
 209
 210 #ifdef ZFS_DEBUG
 211 #define dprintf_dd(dd, fmt, ...) do { \
 212         if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
 213         char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
 214         dsl_dir_name(dd, __ds_name); \
 215         dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
 216         kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
 217         } \
 218 _NOTE(CONSTCOND) } while (0)
 219 #else
 220 #define dprintf_dd(dd, fmt, ...)
 221 #endif
 222
 223 #ifdef  __cplusplus
 224 }
 225 #endif
 226
 227 #endif /* _SYS_DSL_DIR_H */