sys/dsl_dir.h

Go to the documentation of this file.

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>.
 * All rights reserved.
 */

#ifndef _SYS_DSL_DIR_H
#define _SYS_DSL_DIR_H

#include <sys/dmu.h>
#include <sys/dsl_pool.h>
#include <sys/dsl_synctask.h>
#include <sys/refcount.h>
#include <sys/zfs_context.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct dsl_dataset;

typedef enum dd_used {
        DD_USED_HEAD,
        DD_USED_SNAP,
        DD_USED_CHILD,
        DD_USED_CHILD_RSRV,
        DD_USED_REFRSRV,
        DD_USED_NUM
} dd_used_t;

#define DD_FLAG_USED_BREAKDOWN (1<<0)

typedef struct dsl_dir_phys {
        uint64_t dd_creation_time; 
        uint64_t dd_head_dataset_obj;
        uint64_t dd_parent_obj;
        uint64_t dd_origin_obj;
        uint64_t dd_child_dir_zapobj;
        uint64_t dd_used_bytes;
        uint64_t dd_compressed_bytes;
        uint64_t dd_uncompressed_bytes;
        uint64_t dd_quota;
        uint64_t dd_reserved;
        uint64_t dd_props_zapobj;
        uint64_t dd_deleg_zapobj; 
        uint64_t dd_flags;
        uint64_t dd_used_breakdown[DD_USED_NUM];
        uint64_t dd_clones; 
        uint64_t dd_pad[13]; 
} dsl_dir_phys_t;

struct dsl_dir {
        uint64_t dd_object;
        dsl_dir_phys_t *dd_phys;
        dmu_buf_t *dd_dbuf;
        dsl_pool_t *dd_pool;

        txg_node_t dd_dirty_link;

        dsl_dir_t *dd_parent;

        kmutex_t dd_lock;
        list_t dd_prop_cbs; 
        timestruc_t dd_snap_cmtime; 
        uint64_t dd_origin_txg;
        uint64_t dd_tempreserved[TXG_SIZE];
        int64_t dd_space_towrite[TXG_SIZE];

        char dd_myname[MAXNAMELEN];
};

void dsl_dir_close(dsl_dir_t *dd, void *tag);
int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail);
int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **,
    const char **tailp);
int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj,
    const char *tail, void *tag, dsl_dir_t **);
void dsl_dir_name(dsl_dir_t *dd, char *buf);
int dsl_dir_namelen(dsl_dir_t *dd);
uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
    const char *name, dmu_tx_t *tx);
dsl_checkfunc_t dsl_dir_destroy_check;
dsl_syncfunc_t dsl_dir_destroy_sync;
void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
uint64_t dsl_dir_space_available(dsl_dir_t *dd,
    dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
    uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep,
    dmu_tx_t *tx);
void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
    int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
    dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
    uint64_t quota);
int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
    uint64_t reservation);
int dsl_dir_rename(dsl_dir_t *dd, const char *newname, int flags);
int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space);
int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx);
boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
    uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd);

/* internal reserved dir name */
#define MOS_DIR_NAME "$MOS"
#define ORIGIN_DIR_NAME "$ORIGIN"
#define XLATION_DIR_NAME "$XLATION"
#define FREE_DIR_NAME "$FREE"

#ifdef ZFS_DEBUG
#define dprintf_dd(dd, fmt, ...) do { \
        if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
        char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \
            KM_SLEEP); \
        dsl_dir_name(dd, __ds_name); \
        dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
        kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \
        } \
_NOTE(CONSTCOND) } while (0)
#else
#define dprintf_dd(dd, fmt, ...)
#endif

#ifdef  __cplusplus
}
#endif

#endif /* _SYS_DSL_DIR_H */