184 lines
6.1 KiB
C
184 lines
6.1 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Delphix. All rights reserved.
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* Copyright (c) 2014, Joyent, Inc. All rights reserved.
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*/
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#ifndef _SYS_DSL_DIR_H
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#define _SYS_DSL_DIR_H
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#include <sys/dmu.h>
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#include <sys/dsl_pool.h>
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#include <sys/dsl_synctask.h>
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#include <sys/refcount.h>
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#include <sys/zfs_context.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct dsl_dataset;
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/*
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* DD_FIELD_* are strings that are used in the "extensified" dsl_dir zap object.
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* They should be of the format <reverse-dns>:<field>.
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*/
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#define DD_FIELD_FILESYSTEM_COUNT "com.joyent:filesystem_count"
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#define DD_FIELD_SNAPSHOT_COUNT "com.joyent:snapshot_count"
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typedef enum dd_used {
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DD_USED_HEAD,
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DD_USED_SNAP,
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DD_USED_CHILD,
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DD_USED_CHILD_RSRV,
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DD_USED_REFRSRV,
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DD_USED_NUM
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} dd_used_t;
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#define DD_FLAG_USED_BREAKDOWN (1<<0)
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typedef struct dsl_dir_phys {
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uint64_t dd_creation_time; /* not actually used */
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uint64_t dd_head_dataset_obj;
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uint64_t dd_parent_obj;
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uint64_t dd_origin_obj;
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uint64_t dd_child_dir_zapobj;
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/*
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* how much space our children are accounting for; for leaf
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* datasets, == physical space used by fs + snaps
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*/
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uint64_t dd_used_bytes;
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uint64_t dd_compressed_bytes;
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uint64_t dd_uncompressed_bytes;
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/* Administrative quota setting */
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uint64_t dd_quota;
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/* Administrative reservation setting */
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uint64_t dd_reserved;
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uint64_t dd_props_zapobj;
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uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
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uint64_t dd_flags;
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uint64_t dd_used_breakdown[DD_USED_NUM];
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uint64_t dd_clones; /* dsl_dir objects */
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uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */
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} dsl_dir_phys_t;
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struct dsl_dir {
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/* These are immutable; no lock needed: */
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uint64_t dd_object;
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dsl_dir_phys_t *dd_phys;
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dmu_buf_t *dd_dbuf;
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dsl_pool_t *dd_pool;
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/* protected by lock on pool's dp_dirty_dirs list */
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txg_node_t dd_dirty_link;
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/* protected by dp_config_rwlock */
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dsl_dir_t *dd_parent;
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/* Protected by dd_lock */
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kmutex_t dd_lock;
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list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */
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timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */
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uint64_t dd_origin_txg;
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/* gross estimate of space used by in-flight tx's */
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uint64_t dd_tempreserved[TXG_SIZE];
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/* amount of space we expect to write; == amount of dirty data */
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int64_t dd_space_towrite[TXG_SIZE];
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/* protected by dd_lock; keep at end of struct for better locality */
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char dd_myname[MAXNAMELEN];
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};
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void dsl_dir_rele(dsl_dir_t *dd, void *tag);
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int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag,
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dsl_dir_t **, const char **tail);
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int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj,
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const char *tail, void *tag, dsl_dir_t **);
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void dsl_dir_name(dsl_dir_t *dd, char *buf);
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int dsl_dir_namelen(dsl_dir_t *dd);
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uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
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const char *name, dmu_tx_t *tx);
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void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
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uint64_t dsl_dir_space_available(dsl_dir_t *dd,
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dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
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void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
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void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
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int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
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uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep,
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dmu_tx_t *tx);
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void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
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void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
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void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
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int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
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void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
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dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
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int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
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uint64_t quota);
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int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
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uint64_t reservation);
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int dsl_dir_activate_fs_ss_limit(const char *);
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int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *,
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cred_t *);
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void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *);
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int dsl_dir_rename(const char *oldname, const char *newname);
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int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd,
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uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *);
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boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
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void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
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uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
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void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
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timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd);
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void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value,
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dmu_tx_t *tx);
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void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx);
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boolean_t dsl_dir_is_zapified(dsl_dir_t *dd);
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/* internal reserved dir name */
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#define MOS_DIR_NAME "$MOS"
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#define ORIGIN_DIR_NAME "$ORIGIN"
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#define XLATION_DIR_NAME "$XLATION"
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#define FREE_DIR_NAME "$FREE"
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#define LEAK_DIR_NAME "$LEAK"
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#ifdef ZFS_DEBUG
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#define dprintf_dd(dd, fmt, ...) do { \
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if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
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char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \
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KM_SLEEP); \
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dsl_dir_name(dd, __ds_name); \
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dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
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kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \
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} \
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_NOTE(CONSTCOND) } while (0)
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#else
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#define dprintf_dd(dd, fmt, ...)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_DIR_H */
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