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 2008 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 #include <sys/isa_defs.h>
30 #include <sys/types32.h>
34 #include <sys/rrwlock.h>
35 #include <sys/zfs_ioctl.h>
41 typedef struct zfsvfs zfsvfs_t;
44 vfs_t *z_vfs; /* generic fs struct */
45 zfsvfs_t *z_parent; /* parent fs */
46 objset_t *z_os; /* objset reference */
47 uint64_t z_root; /* id of root znode */
48 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
49 uint64_t z_max_blksz; /* maximum block size for files */
50 uint64_t z_fuid_obj; /* fuid table object number */
51 uint64_t z_fuid_size; /* fuid table size */
52 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
53 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
54 krwlock_t z_fuid_lock; /* fuid lock */
55 boolean_t z_fuid_loaded; /* fuid tables are loaded */
56 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
57 zilog_t *z_log; /* intent log pointer */
58 uint_t z_acl_mode; /* acl chmod/mode behavior */
59 uint_t z_acl_inherit; /* acl inheritance behavior */
60 zfs_case_t z_case; /* case-sense */
61 boolean_t z_utf8; /* utf8-only */
62 int z_norm; /* normalization flags */
63 boolean_t z_atime; /* enable atimes mount option */
64 boolean_t z_unmounted; /* unmounted */
65 rrwlock_t z_teardown_lock;
66 krwlock_t z_teardown_inactive_lock;
67 list_t z_all_znodes; /* all vnodes in the fs */
68 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
69 vnode_t *z_ctldir; /* .zfs directory pointer */
70 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
71 boolean_t z_issnap; /* true if this is a snapshot */
72 boolean_t z_vscan; /* virus scan on/off */
73 boolean_t z_use_fuids; /* version allows fuids */
74 boolean_t z_replay; /* set during ZIL replay */
75 kmutex_t z_online_recv_lock; /* recv in prog grabs as WRITER */
76 uint64_t z_version; /* ZPL version */
77 #define ZFS_OBJ_MTX_SZ 64
78 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
82 * Normal filesystems (those not under .zfs/snapshot) have a total
83 * file ID size limited to 12 bytes (including the length field) due to
84 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
85 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
86 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
87 * is not possible to expand beyond 12 bytes without abandoning support
90 * For normal filesystems, we partition up the available space as follows:
91 * 2 bytes fid length (required)
92 * 6 bytes object number (48 bits)
93 * 4 bytes generation number (32 bits)
95 * We reserve only 48 bits for the object number, as this is the limit
96 * currently defined and imposed by the DMU.
98 typedef struct zfid_short {
100 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
101 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
105 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
106 * (including the length field). This makes files under .zfs/snapshot
107 * accessible by NFSv3 and NFSv4, but not NFSv2.
109 * For files under .zfs/snapshot, we partition up the available space
111 * 2 bytes fid length (required)
112 * 6 bytes object number (48 bits)
113 * 4 bytes generation number (32 bits)
114 * 6 bytes objset id (48 bits)
115 * 4 bytes currently just zero (32 bits)
117 * We reserve only 48 bits for the object number and objset id, as these are
118 * the limits currently defined and imposed by the DMU.
120 typedef struct zfid_long {
122 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
123 uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */
126 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
127 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
129 extern uint_t zfs_fsyncer_key;
131 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs, char *osname, int *mode);
132 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname, int mode);
138 #endif /* _SYS_FS_ZFS_VFSOPS_H */