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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 #ifndef _SYS_FS_ZFS_VFSOPS_H
26 #define _SYS_FS_ZFS_VFSOPS_H
32 #include <sys/rrwlock.h>
33 #include <sys/zfs_ioctl.h>
39 typedef struct zfsvfs zfsvfs_t;
43 vfs_t *z_vfs; /* generic fs struct */
44 zfsvfs_t *z_parent; /* parent fs */
45 objset_t *z_os; /* objset reference */
46 uint64_t z_root; /* id of root znode */
47 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
48 uint64_t z_max_blksz; /* maximum block size for files */
49 uint64_t z_fuid_obj; /* fuid table object number */
50 uint64_t z_fuid_size; /* fuid table size */
51 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
52 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
53 krwlock_t z_fuid_lock; /* fuid lock */
54 boolean_t z_fuid_loaded; /* fuid tables are loaded */
55 boolean_t z_fuid_dirty; /* need to sync fuid table ? */
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 boolean_t z_use_sa; /* version allow system attributes */
76 uint64_t z_version; /* ZPL version */
77 uint64_t z_shares_dir; /* hidden shares dir */
79 uint64_t z_userquota_obj;
80 uint64_t z_groupquota_obj;
81 uint64_t z_replay_eof; /* New end of file - replay only */
82 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */
83 #define ZFS_OBJ_MTX_SZ 64
84 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
88 * Normal filesystems (those not under .zfs/snapshot) have a total
89 * file ID size limited to 12 bytes (including the length field) due to
90 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
91 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
92 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
93 * is not possible to expand beyond 12 bytes without abandoning support
96 * For normal filesystems, we partition up the available space as follows:
97 * 2 bytes fid length (required)
98 * 6 bytes object number (48 bits)
99 * 4 bytes generation number (32 bits)
101 * We reserve only 48 bits for the object number, as this is the limit
102 * currently defined and imposed by the DMU.
104 typedef struct zfid_short {
106 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
107 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
111 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
112 * (including the length field). This makes files under .zfs/snapshot
113 * accessible by NFSv3 and NFSv4, but not NFSv2.
115 * For files under .zfs/snapshot, we partition up the available space
117 * 2 bytes fid length (required)
118 * 6 bytes object number (48 bits)
119 * 4 bytes generation number (32 bits)
120 * 6 bytes objset id (48 bits)
121 * 4 bytes currently just zero (32 bits)
123 * We reserve only 48 bits for the object number and objset id, as these are
124 * the limits currently defined and imposed by the DMU.
126 typedef struct zfid_long {
128 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
129 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */
132 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
133 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
135 extern uint_t zfs_fsyncer_key;
136 extern int zfs_super_owner;
138 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
139 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname);
140 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
141 const char *domain, uint64_t rid, uint64_t *valuep);
142 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
143 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
144 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
145 const char *domain, uint64_t rid, uint64_t quota);
146 extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *,
148 extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
150 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
151 extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
152 extern void zfsvfs_free(zfsvfs_t *zfsvfs);
153 extern int zfs_check_global_label(const char *dsname, const char *hexsl);
154 extern int zfs_vnode_lock(vnode_t *vp, int flags);
160 #endif /* _SYS_FS_ZFS_VFSOPS_H */