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/*
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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 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_FS_ZFS_VFSOPS_H
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#define _SYS_FS_ZFS_VFSOPS_H
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <sys/isa_defs.h>
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#include <sys/types32.h>
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#include <sys/list.h>
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#include <sys/vfs.h>
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#include <sys/zil.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct zfsvfs zfsvfs_t;
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struct zfsvfs {
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vfs_t *z_vfs; /* generic fs struct */
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zfsvfs_t *z_parent; /* parent fs */
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objset_t *z_os; /* objset reference */
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uint64_t z_root; /* id of root znode */
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uint64_t z_unlinkedobj; /* id of unlinked zapobj */
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uint64_t z_max_blksz; /* maximum block size for files */
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uint64_t z_assign; /* TXG_NOWAIT or set by zil_replay() */
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zilog_t *z_log; /* intent log pointer */
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uint_t z_acl_mode; /* acl chmod/mode behavior */
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uint_t z_acl_inherit; /* acl inheritance behavior */
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boolean_t z_atime; /* enable atimes mount option */
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boolean_t z_unmounted1; /* unmounted phase 1 */
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boolean_t z_unmounted2; /* unmounted phase 2 */
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uint32_t z_op_cnt; /* vnode/vfs operations ref count */
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krwlock_t z_um_lock; /* rw lock for umount phase 2 */
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list_t z_all_znodes; /* all vnodes in the fs */
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kmutex_t z_znodes_lock; /* lock for z_all_znodes */
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vnode_t *z_ctldir; /* .zfs directory pointer */
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boolean_t z_show_ctldir; /* expose .zfs in the root dir */
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boolean_t z_issnap; /* true if this is a snapshot */
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uint64_t z_version;
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#define ZFS_OBJ_MTX_SZ 64
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kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
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};
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/*
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* The total file ID size is limited to 12 bytes (including the length
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* field) in the NFSv2 protocol. For historical reasons, this same limit
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* is currently being imposed by the Solaris NFSv3 implementation...
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* although the protocol actually permits a maximum of 64 bytes. It will
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* not be possible to expand beyond 12 bytes without abandoning support
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* of NFSv2 and making some changes to the Solaris NFSv3 implementation.
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*
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* For the time being, we will partition up the available space as follows:
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* 2 bytes fid length (required)
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* 6 bytes object number (48 bits)
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* 4 bytes generation number (32 bits)
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* We reserve only 48 bits for the object number, as this is the limit
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* currently defined and imposed by the DMU.
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*/
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typedef struct zfid_short {
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uint16_t zf_len;
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uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
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uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
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} zfid_short_t;
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typedef struct zfid_long {
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zfid_short_t z_fid;
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uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
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uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */
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} zfid_long_t;
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#define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
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#define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_FS_ZFS_VFSOPS_H */
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