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
30 #if __FreeBSD_version >= 1300125
34 #if __FreeBSD_version >= 1300109
35 #define TEARDOWN_INACTIVE_RMS
38 #include <sys/dataset_kstats.h>
43 #include <sys/rrwlock.h>
44 #ifdef TEARDOWN_INACTIVE_RMS
45 #include <sys/rmlock.h>
47 #include <sys/zfs_ioctl.h>
54 typedef struct rmslock zfs_teardown_lock_t;
56 #define zfs_teardown_lock_t rrmlock_t
59 #ifdef TEARDOWN_INACTIVE_RMS
60 typedef struct rmslock zfs_teardown_inactive_lock_t;
62 #define zfs_teardown_inactive_lock_t krwlock_t
65 typedef struct zfsvfs zfsvfs_t;
69 vfs_t *z_vfs; /* generic fs struct */
70 zfsvfs_t *z_parent; /* parent fs */
71 objset_t *z_os; /* objset reference */
72 uint64_t z_flags; /* super_block flags */
73 uint64_t z_root; /* id of root znode */
74 uint64_t z_unlinkedobj; /* id of unlinked zapobj */
75 uint64_t z_max_blksz; /* maximum block size for files */
76 uint64_t z_fuid_obj; /* fuid table object number */
77 uint64_t z_fuid_size; /* fuid table size */
78 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */
79 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */
80 krwlock_t z_fuid_lock; /* fuid lock */
81 boolean_t z_fuid_loaded; /* fuid tables are loaded */
82 boolean_t z_fuid_dirty; /* need to sync fuid table ? */
83 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */
84 zilog_t *z_log; /* intent log pointer */
85 uint_t z_acl_type; /* type of acl usable on this fs */
86 uint_t z_acl_mode; /* acl chmod/mode behavior */
87 uint_t z_acl_inherit; /* acl inheritance behavior */
88 zfs_case_t z_case; /* case-sense */
89 boolean_t z_utf8; /* utf8-only */
90 int z_norm; /* normalization flags */
91 boolean_t z_atime; /* enable atimes mount option */
92 boolean_t z_unmounted; /* unmounted */
93 zfs_teardown_lock_t z_teardown_lock;
94 zfs_teardown_inactive_lock_t z_teardown_inactive_lock;
95 list_t z_all_znodes; /* all vnodes in the fs */
96 uint64_t z_nr_znodes; /* number of znodes in the fs */
97 kmutex_t z_znodes_lock; /* lock for z_all_znodes */
98 struct zfsctl_root *z_ctldir; /* .zfs directory pointer */
99 boolean_t z_show_ctldir; /* expose .zfs in the root dir */
100 boolean_t z_issnap; /* true if this is a snapshot */
101 boolean_t z_vscan; /* virus scan on/off */
102 boolean_t z_use_fuids; /* version allows fuids */
103 boolean_t z_replay; /* set during ZIL replay */
104 boolean_t z_use_sa; /* version allow system attributes */
105 boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */
106 boolean_t z_use_namecache; /* make use of FreeBSD name cache */
107 uint8_t z_xattr; /* xattr type in use */
108 uint64_t z_version; /* ZPL version */
109 uint64_t z_shares_dir; /* hidden shares dir */
110 dataset_kstats_t z_kstat; /* fs kstats */
112 uint64_t z_userquota_obj;
113 uint64_t z_groupquota_obj;
114 uint64_t z_userobjquota_obj;
115 uint64_t z_groupobjquota_obj;
116 uint64_t z_projectquota_obj;
117 uint64_t z_projectobjquota_obj;
118 uint64_t z_replay_eof; /* New end of file - replay only */
119 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */
120 #define ZFS_OBJ_MTX_SZ 64
121 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */
122 struct task z_unlinked_drain_task;
126 #define ZFS_TEARDOWN_INIT(zfsvfs) \
127 rms_init(&(zfsvfs)->z_teardown_lock, "zfs teardown")
129 #define ZFS_TEARDOWN_DESTROY(zfsvfs) \
130 rms_destroy(&(zfsvfs)->z_teardown_lock)
132 #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \
133 rms_try_rlock(&(zfsvfs)->z_teardown_lock)
135 #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \
136 rms_rlock(&(zfsvfs)->z_teardown_lock);
138 #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \
139 rms_runlock(&(zfsvfs)->z_teardown_lock)
141 #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \
142 rms_wlock(&(zfsvfs)->z_teardown_lock)
144 #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \
145 rms_wunlock(&(zfsvfs)->z_teardown_lock)
147 #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \
148 rms_unlock(&(zfsvfs)->z_teardown_lock)
150 #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \
151 rms_rowned(&(zfsvfs)->z_teardown_lock)
153 #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \
154 rms_wowned(&(zfsvfs)->z_teardown_lock)
156 #define ZFS_TEARDOWN_HELD(zfsvfs) \
157 rms_owned_any(&(zfsvfs)->z_teardown_lock)
159 #define ZFS_TEARDOWN_INIT(zfsvfs) \
160 rrm_init(&(zfsvfs)->z_teardown_lock, B_FALSE)
162 #define ZFS_TEARDOWN_DESTROY(zfsvfs) \
163 rrm_destroy(&(zfsvfs)->z_teardown_lock)
165 #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \
166 rw_tryenter(&(zfsvfs)->z_teardown_lock, RW_READER)
168 #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \
169 rrm_enter_read(&(zfsvfs)->z_teardown_lock, tag);
171 #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \
172 rrm_exit(&(zfsvfs)->z_teardown_lock, tag)
174 #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \
175 rrm_enter(&(zfsvfs)->z_teardown_lock, RW_WRITER, tag)
177 #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \
178 rrm_exit(&(zfsvfs)->z_teardown_lock, tag)
180 #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \
181 rrm_exit(&(zfsvfs)->z_teardown_lock, tag)
183 #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \
184 RRM_READ_HELD(&(zfsvfs)->z_teardown_lock)
186 #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \
187 RRM_WRITE_HELD(&(zfsvfs)->z_teardown_lock)
189 #define ZFS_TEARDOWN_HELD(zfsvfs) \
190 RRM_LOCK_HELD(&(zfsvfs)->z_teardown_lock)
193 #ifdef TEARDOWN_INACTIVE_RMS
194 #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \
195 rms_init(&(zfsvfs)->z_teardown_inactive_lock, "zfs teardown inactive")
197 #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \
198 rms_destroy(&(zfsvfs)->z_teardown_inactive_lock)
200 #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \
201 rms_try_rlock(&(zfsvfs)->z_teardown_inactive_lock)
203 #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \
204 rms_rlock(&(zfsvfs)->z_teardown_inactive_lock)
206 #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \
207 rms_runlock(&(zfsvfs)->z_teardown_inactive_lock)
209 #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \
210 rms_wlock(&(zfsvfs)->z_teardown_inactive_lock)
212 #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \
213 rms_wunlock(&(zfsvfs)->z_teardown_inactive_lock)
215 #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \
216 rms_wowned(&(zfsvfs)->z_teardown_inactive_lock)
218 #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \
219 rw_init(&(zfsvfs)->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL)
221 #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \
222 rw_destroy(&(zfsvfs)->z_teardown_inactive_lock)
224 #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \
225 rw_tryenter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER)
227 #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \
228 rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER)
230 #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \
231 rw_exit(&(zfsvfs)->z_teardown_inactive_lock)
233 #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \
234 rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_WRITER)
236 #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \
237 rw_exit(&(zfsvfs)->z_teardown_inactive_lock)
239 #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \
240 RW_WRITE_HELD(&(zfsvfs)->z_teardown_inactive_lock)
243 #define ZSB_XATTR 0x0001 /* Enable user xattrs */
245 * Normal filesystems (those not under .zfs/snapshot) have a total
246 * file ID size limited to 12 bytes (including the length field) due to
247 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical
248 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
249 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It
250 * is not possible to expand beyond 12 bytes without abandoning support
253 * For normal filesystems, we partition up the available space as follows:
254 * 2 bytes fid length (required)
255 * 6 bytes object number (48 bits)
256 * 4 bytes generation number (32 bits)
258 * We reserve only 48 bits for the object number, as this is the limit
259 * currently defined and imposed by the DMU.
261 typedef struct zfid_short {
263 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */
264 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */
268 * Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes
269 * (including the length field). This makes files under .zfs/snapshot
270 * accessible by NFSv3 and NFSv4, but not NFSv2.
272 * For files under .zfs/snapshot, we partition up the available space
274 * 2 bytes fid length (required)
275 * 6 bytes object number (48 bits)
276 * 4 bytes generation number (32 bits)
277 * 6 bytes objset id (48 bits)
278 * 4 bytes[**] currently just zero (32 bits)
280 * We reserve only 48 bits for the object number and objset id, as these are
281 * the limits currently defined and imposed by the DMU.
283 * [*] 20 bytes on FreeBSD to fit into the size of struct fid.
284 * [**] 2 bytes on FreeBSD for the above reason.
286 typedef struct zfid_long {
288 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */
289 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */
292 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t))
293 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t))
295 extern uint_t zfs_fsyncer_key;
296 extern int zfs_super_owner;
298 extern void zfs_init(void);
299 extern void zfs_fini(void);
301 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
302 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
303 extern int zfs_end_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds);
304 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
305 extern int zfsvfs_create(const char *name, boolean_t readonly, zfsvfs_t **zfvp);
306 extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os);
307 extern void zfsvfs_free(zfsvfs_t *zfsvfs);
308 extern int zfs_check_global_label(const char *dsname, const char *hexsl);
309 extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs);
310 extern int zfs_get_temporary_prop(struct dsl_dataset *ds, zfs_prop_t zfs_prop,
311 uint64_t *val, char *setpoint);
312 extern int zfs_busy(void);
318 #endif /* _SYS_FS_ZFS_VFSOPS_H */