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.
23 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>.
24 * All rights reserved.
27 #ifndef _SYS_FS_ZFS_VFSOPS_H
28 #define _SYS_FS_ZFS_VFSOPS_H
34 #include <sys/rrwlock.h>
35 #include <sys/zfs_ioctl.h>
36 #include <sys/rmlock.h>
42 typedef struct zfsvfs zfsvfs_t;
46 vfs_t *z_vfs; /* generic fs struct */
47 zfsvfs_t *z_parent; /* parent fs */
48 objset_t *z_os; /* objset reference */
49 uint64_t z_root; /* id of root znode */
50 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
51 uint64_t z_max_blksz; /* maximum block size for files */
52 uint64_t z_fuid_obj; /* fuid table object number */
53 uint64_t z_fuid_size; /* fuid table size */
54 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
55 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
56 krwlock_t z_fuid_lock; /* fuid lock */
57 boolean_t z_fuid_loaded; /* fuid tables are loaded */
58 boolean_t z_fuid_dirty; /* need to sync fuid table ? */
59 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
60 zilog_t *z_log; /* intent log pointer */
61 uint_t z_acl_mode; /* acl chmod/mode behavior */
62 uint_t z_acl_inherit; /* acl inheritance behavior */
63 zfs_case_t z_case; /* case-sense */
64 boolean_t z_utf8; /* utf8-only */
65 int z_norm; /* normalization flags */
66 boolean_t z_atime; /* enable atimes mount option */
67 boolean_t z_unmounted; /* unmounted */
68 rrmlock_t z_teardown_lock;
69 struct rmslock z_teardown_inactive_lock;
70 list_t z_all_znodes; /* all vnodes in the fs */
71 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
72 struct zfsctl_root *z_ctldir; /* .zfs directory pointer */
73 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
74 boolean_t z_issnap; /* true if this is a snapshot */
75 boolean_t z_vscan; /* virus scan on/off */
76 boolean_t z_use_fuids; /* version allows fuids */
77 boolean_t z_replay; /* set during ZIL replay */
78 boolean_t z_use_sa; /* version allow system attributes */
79 boolean_t z_use_namecache;/* make use of FreeBSD name cache */
80 uint64_t z_version; /* ZPL version */
81 uint64_t z_shares_dir; /* hidden shares dir */
83 uint64_t z_userquota_obj;
84 uint64_t z_groupquota_obj;
85 uint64_t z_replay_eof; /* New end of file - replay only */
86 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */
87 #define ZFS_OBJ_MTX_SZ 64
88 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
89 #if defined(__FreeBSD__)
90 struct task z_unlinked_drain_task;
94 #define ZFS_TRYRLOCK_TEARDOWN_INACTIVE(zfsvfs) \
95 rms_try_rlock(&(zfsvfs)->z_teardown_inactive_lock)
97 #define ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs) \
98 rms_rlock(&(zfsvfs)->z_teardown_inactive_lock)
100 #define ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
101 rms_runlock(&(zfsvfs)->z_teardown_inactive_lock)
103 #define ZFS_WLOCK_TEARDOWN_INACTIVE(zfsvfs) \
104 rms_wlock(&(zfsvfs)->z_teardown_inactive_lock)
106 #define ZFS_WUNLOCK_TEARDOWN_INACTIVE(zfsvfs) \
107 rms_wunlock(&(zfsvfs)->z_teardown_inactive_lock)
109 #define ZFS_TEARDOWN_INACTIVE_WLOCKED(zfsvfs) \
110 rms_wowned(&(zfsvfs)->z_teardown_inactive_lock)
113 * Normal filesystems (those not under .zfs/snapshot) have a total
114 * file ID size limited to 12 bytes (including the length field) due to
115 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
116 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
117 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
118 * is not possible to expand beyond 12 bytes without abandoning support
121 * For normal filesystems, we partition up the available space as follows:
122 * 2 bytes fid length (required)
123 * 6 bytes object number (48 bits)
124 * 4 bytes generation number (32 bits)
126 * We reserve only 48 bits for the object number, as this is the limit
127 * currently defined and imposed by the DMU.
129 typedef struct zfid_short {
131 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
132 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
136 * Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes
137 * (including the length field). This makes files under .zfs/snapshot
138 * accessible by NFSv3 and NFSv4, but not NFSv2.
140 * For files under .zfs/snapshot, we partition up the available space
142 * 2 bytes fid length (required)
143 * 6 bytes object number (48 bits)
144 * 4 bytes generation number (32 bits)
145 * 6 bytes objset id (48 bits)
146 * 4 bytes[**] currently just zero (32 bits)
148 * We reserve only 48 bits for the object number and objset id, as these are
149 * the limits currently defined and imposed by the DMU.
151 * [*] 20 bytes on FreeBSD to fit into the size of struct fid.
152 * [**] 2 bytes on FreeBSD for the above reason.
154 typedef struct zfid_long {
156 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
157 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */
160 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
161 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
163 extern uint_t zfs_fsyncer_key;
164 extern int zfs_super_owner;
166 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
167 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
168 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
169 const char *domain, uint64_t rid, uint64_t *valuep);
170 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
171 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
172 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
173 const char *domain, uint64_t rid, uint64_t quota);
174 extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *,
176 extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
178 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
179 extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
180 extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os);
181 extern void zfsvfs_free(zfsvfs_t *zfsvfs);
182 extern int zfs_check_global_label(const char *dsname, const char *hexsl);
185 extern void zfsvfs_update_fromname(const char *oldname, const char *newname);
192 #endif /* _SYS_FS_ZFS_VFSOPS_H */