240 lines
8.5 KiB
C
240 lines
8.5 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) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>.
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* All rights reserved.
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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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#if __FreeBSD_version >= 1300109
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#define TEARDOWN_INACTIVE_RMS
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#endif
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#include <sys/dataset_kstats.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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#include <sys/sa.h>
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#include <sys/rrwlock.h>
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#ifdef TEARDOWN_INACTIVE_RMS
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#include <sys/rmlock.h>
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#endif
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#include <sys/zfs_ioctl.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef TEARDOWN_INACTIVE_RMS
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typedef struct rmslock zfs_teardown_lock_t;
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#else
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#define zfs_teardown_lock_t krwlock_t
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#endif
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typedef struct zfsvfs zfsvfs_t;
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struct znode;
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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_flags; /* super_block flags */
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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_fuid_obj; /* fuid table object number */
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uint64_t z_fuid_size; /* fuid table size */
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avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
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avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
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krwlock_t z_fuid_lock; /* fuid lock */
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boolean_t z_fuid_loaded; /* fuid tables are loaded */
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boolean_t z_fuid_dirty; /* need to sync fuid table ? */
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struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
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zilog_t *z_log; /* intent log pointer */
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uint_t z_acl_type; /* type of acl usable on this fs */
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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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zfs_case_t z_case; /* case-sense */
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boolean_t z_utf8; /* utf8-only */
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int z_norm; /* normalization flags */
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boolean_t z_atime; /* enable atimes mount option */
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boolean_t z_unmounted; /* unmounted */
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rrmlock_t z_teardown_lock;
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zfs_teardown_lock_t z_teardown_inactive_lock;
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list_t z_all_znodes; /* all vnodes in the fs */
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uint64_t z_nr_znodes; /* number of znodes in the fs */
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kmutex_t z_znodes_lock; /* lock for z_all_znodes */
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struct zfsctl_root *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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boolean_t z_vscan; /* virus scan on/off */
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boolean_t z_use_fuids; /* version allows fuids */
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boolean_t z_replay; /* set during ZIL replay */
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boolean_t z_use_sa; /* version allow system attributes */
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boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */
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boolean_t z_use_namecache; /* make use of FreeBSD name cache */
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uint8_t z_xattr; /* xattr type in use */
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uint64_t z_version; /* ZPL version */
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uint64_t z_shares_dir; /* hidden shares dir */
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dataset_kstats_t z_kstat; /* fs kstats */
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kmutex_t z_lock;
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uint64_t z_userquota_obj;
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uint64_t z_groupquota_obj;
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uint64_t z_userobjquota_obj;
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uint64_t z_groupobjquota_obj;
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uint64_t z_projectquota_obj;
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uint64_t z_projectobjquota_obj;
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uint64_t z_replay_eof; /* New end of file - replay only */
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sa_attr_type_t *z_attr_table; /* SA attr mapping->id */
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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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struct task z_unlinked_drain_task;
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};
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#ifdef TEARDOWN_INACTIVE_RMS
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#define ZFS_INIT_TEARDOWN_INACTIVE(zfsvfs) \
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rms_init(&(zfsvfs)->z_teardown_inactive_lock, "zfs teardown inactive")
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#define ZFS_DESTROY_TEARDOWN_INACTIVE(zfsvfs) \
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rms_destroy(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_TRYRLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rms_try_rlock(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rms_rlock(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rms_runlock(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_WLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rms_wlock(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_WUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rms_wunlock(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_TEARDOWN_INACTIVE_WLOCKED(zfsvfs) \
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rms_wowned(&(zfsvfs)->z_teardown_inactive_lock)
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#else
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#define ZFS_INIT_TEARDOWN_INACTIVE(zfsvfs) \
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rw_init(&(zfsvfs)->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL)
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#define ZFS_DESTROY_TEARDOWN_INACTIVE(zfsvfs) \
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rw_destroy(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_TRYRLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rw_tryenter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER)
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#define ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER)
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#define ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rw_exit(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_WLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_WRITER)
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#define ZFS_WUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
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rw_exit(&(zfsvfs)->z_teardown_inactive_lock)
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#define ZFS_TEARDOWN_INACTIVE_WLOCKED(zfsvfs) \
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RW_WRITE_HELD(&(zfsvfs)->z_teardown_inactive_lock)
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#endif
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#define ZSB_XATTR 0x0001 /* Enable user xattrs */
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/*
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* Normal filesystems (those not under .zfs/snapshot) have a total
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* file ID size limited to 12 bytes (including the length field) due to
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* NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
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* reasons, this same limit is being imposed by the Solaris NFSv3 implementation
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* (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
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* is not possible to expand beyond 12 bytes without abandoning support
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* of NFSv2.
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*
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* For normal filesystems, we 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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*
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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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/*
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* Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes
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* (including the length field). This makes files under .zfs/snapshot
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* accessible by NFSv3 and NFSv4, but not NFSv2.
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*
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* For files under .zfs/snapshot, we partition up the available space
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* 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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* 6 bytes objset id (48 bits)
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* 4 bytes[**] currently just zero (32 bits)
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*
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* We reserve only 48 bits for the object number and objset id, as these are
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* the limits currently defined and imposed by the DMU.
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*
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* [*] 20 bytes on FreeBSD to fit into the size of struct fid.
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* [**] 2 bytes on FreeBSD for the above reason.
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*/
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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[2]; /* 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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extern uint_t zfs_fsyncer_key;
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extern int zfs_super_owner;
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extern void zfs_init(void);
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extern void zfs_fini(void);
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extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
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extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
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extern int zfs_end_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
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extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
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extern int zfsvfs_create(const char *name, boolean_t readonly, zfsvfs_t **zfvp);
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extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os);
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extern void zfsvfs_free(zfsvfs_t *zfsvfs);
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extern int zfs_check_global_label(const char *dsname, const char *hexsl);
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extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs);
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extern int zfs_get_temporary_prop(struct dsl_dataset *ds, zfs_prop_t zfs_prop,
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uint64_t *val, char *setpoint);
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extern int zfs_busy(void);
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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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