diff options
Diffstat (limited to 'include/sys/dsl_dir.h')
| -rw-r--r-- | include/sys/dsl_dir.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/include/sys/dsl_dir.h b/include/sys/dsl_dir.h new file mode 100644 index 000000000..2191635dd --- /dev/null +++ b/include/sys/dsl_dir.h @@ -0,0 +1,167 @@ +/* + * 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. + */ + +#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; /* not actually used */ + uint64_t dd_head_dataset_obj; + uint64_t dd_parent_obj; + uint64_t dd_origin_obj; + uint64_t dd_child_dir_zapobj; + /* + * how much space our children are accounting for; for leaf + * datasets, == physical space used by fs + snaps + */ + uint64_t dd_used_bytes; + uint64_t dd_compressed_bytes; + uint64_t dd_uncompressed_bytes; + /* Administrative quota setting */ + uint64_t dd_quota; + /* Administrative reservation setting */ + uint64_t dd_reserved; + uint64_t dd_props_zapobj; + uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ + uint64_t dd_flags; + uint64_t dd_used_breakdown[DD_USED_NUM]; + uint64_t dd_clones; /* dsl_dir objects */ + uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ +} dsl_dir_phys_t; + +struct dsl_dir { + /* These are immutable; no lock needed: */ + uint64_t dd_object; + dsl_dir_phys_t *dd_phys; + dmu_buf_t *dd_dbuf; + dsl_pool_t *dd_pool; + + /* protected by lock on pool's dp_dirty_dirs list */ + txg_node_t dd_dirty_link; + + /* protected by dp_config_rwlock */ + dsl_dir_t *dd_parent; + + /* Protected by dd_lock */ + kmutex_t dd_lock; + list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ + timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ + uint64_t dd_origin_txg; + + /* gross estimate of space used by in-flight tx's */ + uint64_t dd_tempreserved[TXG_SIZE]; + /* amount of space we expect to write; == amount of dirty data */ + int64_t dd_space_towrite[TXG_SIZE]; + + /* protected by dd_lock; keep at end of struct for better locality */ + 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 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 */ |