zfs_vfsops.h revision fa9e4066f08beec538e775443c5be79dd423fcab
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_FS_ZFS_VFSOPS_H
#define _SYS_FS_ZFS_VFSOPS_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/isa_defs.h>
#include <sys/types32.h>
#include <sys/list.h>
#include <sys/vfs.h>
#include <sys/zil.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct zfs_delete_list {
kmutex_t z_mutex;
kcondvar_t z_cv;
kcondvar_t z_quiesce_cv;
uint8_t z_drained;
uint8_t z_draining;
uint32_t z_thread_target;
uint32_t z_thread_count;
uint64_t z_znode_count;
list_t z_znodes;
} zfs_delete_t;
typedef struct zfsvfs zfsvfs_t;
struct zfsvfs {
vfs_t *z_vfs; /* generic fs struct */
zfsvfs_t *z_parent; /* parent fs */
objset_t *z_os; /* objset reference */
uint64_t z_root; /* id of root znode */
uint64_t z_dqueue; /* delete queue */
uint64_t z_max_blksz; /* maximum block size for files */
uint64_t z_assign; /* TXG_NOWAIT or set by zil_replay() */
zilog_t *z_log; /* intent log pointer */
uint_t z_acl_mode; /* acl chmod/mode behavior */
uint_t z_acl_inherit; /* acl inheritance behavior */
boolean_t z_atime; /* enable atimes mount option */
boolean_t z_unmounted1; /* unmounted phase 1 */
boolean_t z_unmounted2; /* unmounted phase 2 */
uint32_t z_op_cnt; /* vnode/vfs operations ref count */
krwlock_t z_um_lock; /* rw lock for umount phase 2 */
zfs_delete_t z_delete_head; /* zfs delete list */
list_t z_all_znodes; /* all vnodes in the fs */
kmutex_t z_znodes_lock; /* lock for z_all_znodes */
vnode_t *z_ctldir; /* .zfs directory pointer */
boolean_t z_show_ctldir; /* expose .zfs in the root dir */
boolean_t z_issnap; /* true if this is a snapshot */
#define ZFS_OBJ_MTX_SZ 64
kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
};
/*
* The total file ID size is limited to 12 bytes (including the length
* field) in the NFSv2 protocol. For historical reasons, this same limit
* is currently being imposed by the Solaris NFSv3 implementation...
* although the protocol actually permits a maximum of 64 bytes. It will
* not be possible to expand beyond 12 bytes without abandoning support
* of NFSv2 and making some changes to the Solaris NFSv3 implementation.
*
* For the time being, we will partition up the available space as follows:
* 2 bytes fid length (required)
* 6 bytes object number (48 bits)
* 4 bytes generation number (32 bits)
* We reserve only 48 bits for the object number, as this is the limit
* currently defined and imposed by the DMU.
*/
typedef struct zfid_short {
uint16_t zf_len;
uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
} zfid_short_t;
typedef struct zfid_long {
zfid_short_t z_fid;
uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */
} zfid_long_t;
#define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
#define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FS_ZFS_VFSOPS_H */