4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #ifndef _SYS_FS_ZFS_VFSOPS_H
27 #define _SYS_FS_ZFS_VFSOPS_H
29 #pragma ident "%Z%%M% %I% %E% SMI"
39 typedef struct zfsvfs zfsvfs_t;
42 vfs_t *z_vfs; /* generic fs struct */
43 zfsvfs_t *z_parent; /* parent fs */
44 objset_t *z_os; /* objset reference */
45 uint64_t z_root; /* id of root znode */
46 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
47 uint64_t z_max_blksz; /* maximum block size for files */
48 uint64_t z_assign; /* TXG_NOWAIT or set by zil_replay() */
49 zilog_t *z_log; /* intent log pointer */
50 uint_t z_acl_mode; /* acl chmod/mode behavior */
51 uint_t z_acl_inherit; /* acl inheritance behavior */
52 boolean_t z_atime; /* enable atimes mount option */
53 boolean_t z_unmounted1; /* unmounted phase 1 */
54 boolean_t z_unmounted2; /* unmounted phase 2 */
55 uint32_t z_op_cnt; /* vnode/vfs operations ref count */
56 krwlock_t z_um_lock; /* rw lock for umount phase 2 */
57 list_t z_all_znodes; /* all vnodes in the fs */
58 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
59 vnode_t *z_ctldir; /* .zfs directory pointer */
60 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
61 boolean_t z_issnap; /* true if this is a snapshot */
62 #define ZFS_OBJ_MTX_SZ 64
63 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
67 * The total file ID size is limited to 12 bytes (including the length
68 * field) in the NFSv2 protocol. For historical reasons, this same limit
69 * is currently being imposed by the Solaris NFSv3 implementation...
70 * although the protocol actually permits a maximum of 64 bytes. It will
71 * not be possible to expand beyond 12 bytes without abandoning support
72 * of NFSv2 and making some changes to the Solaris NFSv3 implementation.
74 * For the time being, we will partition up the available space as follows:
75 * 2 bytes fid length (required)
76 * 6 bytes object number (48 bits)
77 * 4 bytes generation number (32 bits)
78 * We reserve only 48 bits for the object number, as this is the limit
79 * currently defined and imposed by the DMU.
81 typedef struct zfid_short {
83 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
84 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
87 typedef struct zfid_long {
89 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
90 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */
93 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
94 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
100 #endif /* _SYS_FS_ZFS_VFSOPS_H */