1 /*
2 * CDDL HEADER START
3 *
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.
7 *
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.
12 *
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]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #ifndef _SYS_FS_ZFS_VFSOPS_H
26 #define _SYS_FS_ZFS_VFSOPS_H
27
28 #include <sys/isa_defs.h>
29 #include <sys/types32.h>
30 #include <sys/list.h>
31 #include <sys/vfs.h>
32 #include <sys/zil.h>
33 #include <sys/sa.h>
34 #include <sys/rrwlock.h>
35 #include <sys/zfs_ioctl.h>
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 typedef struct zfsvfs zfsvfs_t;
42 struct znode;
43
44 struct zfsvfs {
45 vfs_t *z_vfs; /* generic fs struct */
46 zfsvfs_t *z_parent; /* parent fs */
47 objset_t *z_os; /* objset reference */
48 uint64_t z_root; /* id of root znode */
49 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
50 uint64_t z_max_blksz; /* maximum block size for files */
51 uint64_t z_fuid_obj; /* fuid table object number */
52 uint64_t z_fuid_size; /* fuid table size */
53 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
54 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
55 krwlock_t z_fuid_lock; /* fuid lock */
56 boolean_t z_fuid_loaded; /* fuid tables are loaded */
57 boolean_t z_fuid_dirty; /* need to sync fuid table ? */
58 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
59 zilog_t *z_log; /* intent log pointer */
60 uint_t z_acl_mode; /* acl chmod/mode behavior */
61 uint_t z_acl_inherit; /* acl inheritance behavior */
62 zfs_case_t z_case; /* case-sense */
63 boolean_t z_utf8; /* utf8-only */
64 int z_norm; /* normalization flags */
65 boolean_t z_atime; /* enable atimes mount option */
66 boolean_t z_unmounted; /* unmounted */
67 rrmlock_t z_teardown_lock;
68 krwlock_t z_teardown_inactive_lock;
69 list_t z_all_znodes; /* all vnodes in the fs */
70 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
71 vnode_t *z_ctldir; /* .zfs directory pointer */
72 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
73 boolean_t z_issnap; /* true if this is a snapshot */
74 boolean_t z_vscan; /* virus scan on/off */
75 boolean_t z_use_fuids; /* version allows fuids */
76 boolean_t z_replay; /* set during ZIL replay */
77 boolean_t z_use_sa; /* version allow system attributes */
78 uint64_t z_version; /* ZPL version */
79 uint64_t z_shares_dir; /* hidden shares dir */
80 kmutex_t z_lock;
81 uint64_t z_userquota_obj;
82 uint64_t z_groupquota_obj;
83 uint64_t z_replay_eof; /* New end of file - replay only */
84 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */
85 #define ZFS_OBJ_MTX_SZ 64
86 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
87 };
88
89 /*
90 * Normal filesystems (those not under .zfs/snapshot) have a total
91 * file ID size limited to 12 bytes (including the length field) due to
92 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
93 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
94 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
95 * is not possible to expand beyond 12 bytes without abandoning support
96 * of NFSv2.
97 *
98 * For normal filesystems, we partition up the available space as follows:
99 * 2 bytes fid length (required)
100 * 6 bytes object number (48 bits)
101 * 4 bytes generation number (32 bits)
102 *
103 * We reserve only 48 bits for the object number, as this is the limit
104 * currently defined and imposed by the DMU.
105 */
106 typedef struct zfid_short {
107 uint16_t zf_len;
108 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
109 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
110 } zfid_short_t;
111
112 /*
113 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
114 * (including the length field). This makes files under .zfs/snapshot
115 * accessible by NFSv3 and NFSv4, but not NFSv2.
116 *
117 * For files under .zfs/snapshot, we partition up the available space
118 * as follows:
119 * 2 bytes fid length (required)
120 * 6 bytes object number (48 bits)
121 * 4 bytes generation number (32 bits)
122 * 6 bytes objset id (48 bits)
123 * 4 bytes currently just zero (32 bits)
124 *
125 * We reserve only 48 bits for the object number and objset id, as these are
126 * the limits currently defined and imposed by the DMU.
127 */
128 typedef struct zfid_long {
129 zfid_short_t z_fid;
130 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
131 uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */
132 } zfid_long_t;
133
134 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
135 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
136
137 extern uint_t zfs_fsyncer_key;
138
139 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
140 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
141 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
142 const char *domain, uint64_t rid, uint64_t *valuep);
143 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
144 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
145 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
146 const char *domain, uint64_t rid, uint64_t quota);
147 extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *,
148 boolean_t isgroup);
149 extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
150 uint64_t fuid);
151 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
152 extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
153 extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os);
154 extern void zfsvfs_free(zfsvfs_t *zfsvfs);
155 extern int zfs_check_global_label(const char *dsname, const char *hexsl);
156
157 #ifdef __cplusplus
158 }
159 #endif
160
161 #endif /* _SYS_FS_ZFS_VFSOPS_H */