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 2009 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
32 #include <sys/rrwlock.h>
33 #include <sys/zfs_ioctl.h>
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_fuid_obj; /* fuid table object number */
49 uint64_t z_fuid_size; /* fuid table size */
50 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
51 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
52 krwlock_t z_fuid_lock; /* fuid lock */
53 boolean_t z_fuid_loaded; /* fuid tables are loaded */
54 boolean_t z_fuid_dirty; /* need to sync fuid table ? */
55 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
56 zilog_t *z_log; /* intent log pointer */
57 uint_t z_acl_mode; /* acl chmod/mode behavior */
58 uint_t z_acl_inherit; /* acl inheritance behavior */
59 zfs_case_t z_case; /* case-sense */
60 boolean_t z_utf8; /* utf8-only */
61 int z_norm; /* normalization flags */
62 boolean_t z_atime; /* enable atimes mount option */
63 boolean_t z_unmounted; /* unmounted */
64 rrwlock_t z_teardown_lock;
65 krwlock_t z_teardown_inactive_lock;
66 list_t z_all_znodes; /* all vnodes in the fs */
67 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
68 vnode_t *z_ctldir; /* .zfs directory pointer */
69 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
70 boolean_t z_issnap; /* true if this is a snapshot */
71 boolean_t z_vscan; /* virus scan on/off */
72 boolean_t z_use_fuids; /* version allows fuids */
73 boolean_t z_replay; /* set during ZIL replay */
74 kmutex_t z_online_recv_lock; /* held while recv in progress */
75 uint64_t z_version; /* ZPL version */
76 uint64_t z_shares_dir; /* hidden shares dir */
78 uint64_t z_userquota_obj;
79 uint64_t z_groupquota_obj;
80 #define ZFS_OBJ_MTX_SZ 64
81 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
85 * Normal filesystems (those not under .zfs/snapshot) have a total
86 * file ID size limited to 12 bytes (including the length field) due to
87 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
88 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
89 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
90 * is not possible to expand beyond 12 bytes without abandoning support
93 * For normal filesystems, we partition up the available space as follows:
94 * 2 bytes fid length (required)
95 * 6 bytes object number (48 bits)
96 * 4 bytes generation number (32 bits)
98 * We reserve only 48 bits for the object number, as this is the limit
99 * currently defined and imposed by the DMU.
101 typedef struct zfid_short {
103 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
104 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
108 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
109 * (including the length field). This makes files under .zfs/snapshot
110 * accessible by NFSv3 and NFSv4, but not NFSv2.
112 * For files under .zfs/snapshot, we partition up the available space
114 * 2 bytes fid length (required)
115 * 6 bytes object number (48 bits)
116 * 4 bytes generation number (32 bits)
117 * 6 bytes objset id (48 bits)
118 * 4 bytes currently just zero (32 bits)
120 * We reserve only 48 bits for the object number and objset id, as these are
121 * the limits currently defined and imposed by the DMU.
123 typedef struct zfid_long {
125 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
126 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */
129 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
130 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
132 extern uint_t zfs_fsyncer_key;
133 extern int zfs_super_owner;
135 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs, char *osname, int *mode);
136 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname, int mode);
137 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
138 const char *domain, uint64_t rid, uint64_t *valuep);
139 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
140 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
141 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
142 const char *domain, uint64_t rid, uint64_t quota);
143 extern boolean_t zfs_usergroup_overquota(zfsvfs_t *zfsvfs,
144 boolean_t isgroup, uint64_t fuid);
145 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
146 extern int zfsvfs_create(const char *name, int mode, zfsvfs_t **zvp);
147 extern void zfsvfs_free(zfsvfs_t *zfsvfs);
153 #endif /* _SYS_FS_ZFS_VFSOPS_H */