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 https://opensource.org/licenses/CDDL-1.0.
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 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
24 * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
25 */
26
27 #ifndef _SYS_FS_ZFS_ZNODE_H
28 #define _SYS_FS_ZFS_ZNODE_H
29
30 #include <sys/zfs_acl.h>
31 #include <sys/zil.h>
32 #include <sys/zfs_project.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 /*
39 * Additional file level attributes, that are stored
40 * in the upper half of z_pflags
41 */
42 #define ZFS_READONLY 0x0000000100000000ull
43 #define ZFS_HIDDEN 0x0000000200000000ull
44 #define ZFS_SYSTEM 0x0000000400000000ull
45 #define ZFS_ARCHIVE 0x0000000800000000ull
46 #define ZFS_IMMUTABLE 0x0000001000000000ull
47 #define ZFS_NOUNLINK 0x0000002000000000ull
48 #define ZFS_APPENDONLY 0x0000004000000000ull
49 #define ZFS_NODUMP 0x0000008000000000ull
50 #define ZFS_OPAQUE 0x0000010000000000ull
51 #define ZFS_AV_QUARANTINED 0x0000020000000000ull
52 #define ZFS_AV_MODIFIED 0x0000040000000000ull
53 #define ZFS_REPARSE 0x0000080000000000ull
54 #define ZFS_OFFLINE 0x0000100000000000ull
55 #define ZFS_SPARSE 0x0000200000000000ull
56
57 /*
58 * PROJINHERIT attribute is used to indicate that the child object under the
59 * directory which has the PROJINHERIT attribute needs to inherit its parent
60 * project ID that is used by project quota.
61 */
62 #define ZFS_PROJINHERIT 0x0000400000000000ull
63
64 /*
65 * PROJID attr is used internally to indicate that the object has project ID.
66 */
67 #define ZFS_PROJID 0x0000800000000000ull
68
69 #define ZFS_ATTR_SET(zp, attr, value, pflags, tx) \
70 { \
71 if (value) \
72 pflags |= attr; \
73 else \
74 pflags &= ~attr; \
75 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(ZTOZSB(zp)), \
76 &pflags, sizeof (pflags), tx)); \
77 }
78
79 /*
80 * Define special zfs pflags
81 */
82 #define ZFS_XATTR 0x1 /* is an extended attribute */
83 #define ZFS_INHERIT_ACE 0x2 /* ace has inheritable ACEs */
84 #define ZFS_ACL_TRIVIAL 0x4 /* files ACL is trivial */
85 #define ZFS_ACL_OBJ_ACE 0x8 /* ACL has CMPLX Object ACE */
86 #define ZFS_ACL_PROTECTED 0x10 /* ACL protected */
87 #define ZFS_ACL_DEFAULTED 0x20 /* ACL should be defaulted */
88 #define ZFS_ACL_AUTO_INHERIT 0x40 /* ACL should be inherited */
89 #define ZFS_BONUS_SCANSTAMP 0x80 /* Scanstamp in bonus area */
90 #define ZFS_NO_EXECS_DENIED 0x100 /* exec was given to everyone */
91
92 #define SA_ZPL_ATIME(z) z->z_attr_table[ZPL_ATIME]
93 #define SA_ZPL_MTIME(z) z->z_attr_table[ZPL_MTIME]
94 #define SA_ZPL_CTIME(z) z->z_attr_table[ZPL_CTIME]
95 #define SA_ZPL_CRTIME(z) z->z_attr_table[ZPL_CRTIME]
96 #define SA_ZPL_GEN(z) z->z_attr_table[ZPL_GEN]
97 #define SA_ZPL_DACL_ACES(z) z->z_attr_table[ZPL_DACL_ACES]
98 #define SA_ZPL_XATTR(z) z->z_attr_table[ZPL_XATTR]
99 #define SA_ZPL_SYMLINK(z) z->z_attr_table[ZPL_SYMLINK]
100 #define SA_ZPL_RDEV(z) z->z_attr_table[ZPL_RDEV]
101 #define SA_ZPL_SCANSTAMP(z) z->z_attr_table[ZPL_SCANSTAMP]
102 #define SA_ZPL_UID(z) z->z_attr_table[ZPL_UID]
103 #define SA_ZPL_GID(z) z->z_attr_table[ZPL_GID]
104 #define SA_ZPL_PARENT(z) z->z_attr_table[ZPL_PARENT]
105 #define SA_ZPL_LINKS(z) z->z_attr_table[ZPL_LINKS]
106 #define SA_ZPL_MODE(z) z->z_attr_table[ZPL_MODE]
107 #define SA_ZPL_DACL_COUNT(z) z->z_attr_table[ZPL_DACL_COUNT]
108 #define SA_ZPL_FLAGS(z) z->z_attr_table[ZPL_FLAGS]
109 #define SA_ZPL_SIZE(z) z->z_attr_table[ZPL_SIZE]
110 #define SA_ZPL_ZNODE_ACL(z) z->z_attr_table[ZPL_ZNODE_ACL]
111 #define SA_ZPL_DXATTR(z) z->z_attr_table[ZPL_DXATTR]
112 #define SA_ZPL_PAD(z) z->z_attr_table[ZPL_PAD]
113 #define SA_ZPL_PROJID(z) z->z_attr_table[ZPL_PROJID]
114
115 /*
116 * Is ID ephemeral?
117 */
118 #define IS_EPHEMERAL(x) (x > MAXUID)
119
120 /*
121 * Should we use FUIDs?
122 */
123 #define USE_FUIDS(version, os) (version >= ZPL_VERSION_FUID && \
124 spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID)
125 #define USE_SA(version, os) (version >= ZPL_VERSION_SA && \
126 spa_version(dmu_objset_spa(os)) >= SPA_VERSION_SA)
127
128 #define MASTER_NODE_OBJ 1
129
130 /*
131 * Special attributes for master node.
132 * "userquota@", "groupquota@" and "projectquota@" are also valid (from
133 * zfs_userquota_prop_prefixes[]).
134 */
135 #define ZFS_FSID "FSID"
136 #define ZFS_UNLINKED_SET "DELETE_QUEUE"
137 #define ZFS_ROOT_OBJ "ROOT"
138 #define ZPL_VERSION_STR "VERSION"
139 #define ZFS_FUID_TABLES "FUID"
140 #define ZFS_SHARES_DIR "SHARES"
141 #define ZFS_SA_ATTRS "SA_ATTRS"
142
143 /*
144 * Convert mode bits (zp_mode) to BSD-style DT_* values for storing in
145 * the directory entries. On Linux systems this value is already
146 * defined correctly as part of the /usr/include/dirent.h header file.
147 */
148 #ifndef IFTODT
149 #define IFTODT(mode) (((mode) & S_IFMT) >> 12)
150 #endif
151
152 /*
153 * The directory entry has the type (currently unused on Solaris) in the
154 * top 4 bits, and the object number in the low 48 bits. The "middle"
155 * 12 bits are unused.
156 */
157 #define ZFS_DIRENT_TYPE(de) BF64_GET(de, 60, 4)
158 #define ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48)
159
160 extern int zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len);
161 extern int zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value);
162
163 #ifdef _KERNEL
164 #include <sys/zfs_znode_impl.h>
165
166 /*
167 * Directory entry locks control access to directory entries.
168 * They are used to protect creates, deletes, and renames.
169 * Each directory znode has a mutex and a list of locked names.
170 */
171 typedef struct zfs_dirlock {
172 char *dl_name; /* directory entry being locked */
173 uint32_t dl_sharecnt; /* 0 if exclusive, > 0 if shared */
174 uint8_t dl_namelock; /* 1 if z_name_lock is NOT held */
175 uint16_t dl_namesize; /* set if dl_name was allocated */
176 kcondvar_t dl_cv; /* wait for entry to be unlocked */
177 struct znode *dl_dzp; /* directory znode */
178 struct zfs_dirlock *dl_next; /* next in z_dirlocks list */
179 } zfs_dirlock_t;
180
181 typedef struct znode {
182 uint64_t z_id; /* object ID for this znode */
183 kmutex_t z_lock; /* znode modification lock */
184 krwlock_t z_parent_lock; /* parent lock for directories */
185 krwlock_t z_name_lock; /* "master" lock for dirent locks */
186 zfs_dirlock_t *z_dirlocks; /* directory entry lock list */
187 zfs_rangelock_t z_rangelock; /* file range locks */
188 boolean_t z_unlinked; /* file has been unlinked */
189 boolean_t z_atime_dirty; /* atime needs to be synced */
190 boolean_t z_zn_prefetch; /* Prefetch znodes? */
191 boolean_t z_is_sa; /* are we native sa? */
192 boolean_t z_is_ctldir; /* are we .zfs entry */
193 boolean_t z_suspended; /* extra ref from a suspend? */
194 uint_t z_blksz; /* block size in bytes */
195 uint_t z_seq; /* modification sequence number */
196 uint64_t z_mapcnt; /* number of pages mapped to file */
197 uint64_t z_dnodesize; /* dnode size */
198 uint64_t z_size; /* file size (cached) */
199 uint64_t z_pflags; /* pflags (cached) */
200 uint32_t z_sync_cnt; /* synchronous open count */
201 uint32_t z_sync_writes_cnt; /* synchronous write count */
202 uint32_t z_async_writes_cnt; /* asynchronous write count */
203 mode_t z_mode; /* mode (cached) */
204 kmutex_t z_acl_lock; /* acl data lock */
205 zfs_acl_t *z_acl_cached; /* cached acl */
206 krwlock_t z_xattr_lock; /* xattr data lock */
207 nvlist_t *z_xattr_cached; /* cached xattrs */
208 uint64_t z_xattr_parent; /* parent obj for this xattr */
209 uint64_t z_projid; /* project ID */
210 list_node_t z_link_node; /* all znodes in fs link */
211 sa_handle_t *z_sa_hdl; /* handle to sa data */
212
213 /*
214 * Platform specific field, defined by each platform and only
215 * accessible from platform specific code.
216 */
217 ZNODE_OS_FIELDS;
218 } znode_t;
219
220 /* Verifies the znode is valid. */
221 static inline int
zfs_verify_zp(znode_t * zp)222 zfs_verify_zp(znode_t *zp)
223 {
224 if (unlikely(zp->z_sa_hdl == NULL))
225 return (SET_ERROR(EIO));
226 return (0);
227 }
228
229 /* zfs_enter and zfs_verify_zp together */
230 static inline int
zfs_enter_verify_zp(zfsvfs_t * zfsvfs,znode_t * zp,const char * tag)231 zfs_enter_verify_zp(zfsvfs_t *zfsvfs, znode_t *zp, const char *tag)
232 {
233 int error;
234 if ((error = zfs_enter(zfsvfs, tag)) != 0)
235 return (error);
236 if ((error = zfs_verify_zp(zp)) != 0) {
237 zfs_exit(zfsvfs, tag);
238 return (error);
239 }
240 return (0);
241 }
242
243 typedef struct znode_hold {
244 uint64_t zh_obj; /* object id */
245 avl_node_t zh_node; /* avl tree linkage */
246 kmutex_t zh_lock; /* lock serializing object access */
247 int zh_refcount; /* active consumer reference count */
248 } znode_hold_t;
249
250 static inline uint64_t
zfs_inherit_projid(znode_t * dzp)251 zfs_inherit_projid(znode_t *dzp)
252 {
253 return ((dzp->z_pflags & ZFS_PROJINHERIT) ? dzp->z_projid :
254 ZFS_DEFAULT_PROJID);
255 }
256
257 /*
258 * Timestamp defines
259 */
260 #define ACCESSED (ATTR_ATIME)
261 #define STATE_CHANGED (ATTR_CTIME)
262 #define CONTENT_MODIFIED (ATTR_MTIME | ATTR_CTIME)
263
264 extern int zfs_init_fs(zfsvfs_t *, znode_t **);
265 extern void zfs_set_dataprop(objset_t *);
266 extern void zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *,
267 dmu_tx_t *tx);
268 extern void zfs_tstamp_update_setup(znode_t *, uint_t, uint64_t [2],
269 uint64_t [2]);
270 extern void zfs_grow_blocksize(znode_t *, uint64_t, dmu_tx_t *);
271 extern int zfs_freesp(znode_t *, uint64_t, uint64_t, int, boolean_t);
272 extern void zfs_znode_init(void);
273 extern void zfs_znode_fini(void);
274 extern int zfs_znode_hold_compare(const void *, const void *);
275 extern znode_hold_t *zfs_znode_hold_enter(zfsvfs_t *, uint64_t);
276 extern void zfs_znode_hold_exit(zfsvfs_t *, znode_hold_t *);
277 extern int zfs_zget(zfsvfs_t *, uint64_t, znode_t **);
278 extern int zfs_rezget(znode_t *);
279 extern void zfs_zinactive(znode_t *);
280 extern void zfs_znode_delete(znode_t *, dmu_tx_t *);
281 extern void zfs_remove_op_tables(void);
282 extern int zfs_create_op_tables(void);
283 extern dev_t zfs_cmpldev(uint64_t);
284 extern int zfs_get_stats(objset_t *os, nvlist_t *nv);
285 extern boolean_t zfs_get_vfs_flag_unmounted(objset_t *os);
286 extern void zfs_znode_dmu_fini(znode_t *);
287
288 extern void zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
289 znode_t *dzp, znode_t *zp, const char *name, vsecattr_t *,
290 zfs_fuid_info_t *, vattr_t *vap);
291 extern int zfs_log_create_txtype(zil_create_t, vsecattr_t *vsecp,
292 vattr_t *vap);
293 extern void zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
294 znode_t *dzp, const char *name, uint64_t foid, boolean_t unlinked);
295 #define ZFS_NO_OBJECT 0 /* no object id */
296 extern void zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
297 znode_t *dzp, znode_t *zp, const char *name);
298 extern void zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
299 znode_t *dzp, znode_t *zp, const char *name, const char *link);
300 extern void zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
301 znode_t *sdzp, const char *sname, znode_t *tdzp, const char *dname,
302 znode_t *szp);
303 extern void zfs_log_rename_exchange(zilog_t *zilog, dmu_tx_t *tx,
304 uint64_t txtype, znode_t *sdzp, const char *sname, znode_t *tdzp,
305 const char *dname, znode_t *szp);
306 extern void zfs_log_rename_whiteout(zilog_t *zilog, dmu_tx_t *tx,
307 uint64_t txtype, znode_t *sdzp, const char *sname, znode_t *tdzp,
308 const char *dname, znode_t *szp, znode_t *wzp);
309 extern void zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
310 znode_t *zp, offset_t off, ssize_t len, boolean_t commit,
311 zil_callback_t callback, void *callback_data);
312 extern void zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype,
313 znode_t *zp, uint64_t off, uint64_t len);
314 extern void zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
315 znode_t *zp, vattr_t *vap, uint_t mask_applied, zfs_fuid_info_t *fuidp);
316 extern void zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, znode_t *zp,
317 vsecattr_t *vsecp, zfs_fuid_info_t *fuidp);
318 extern void zfs_log_clone_range(zilog_t *zilog, dmu_tx_t *tx, int txtype,
319 znode_t *zp, uint64_t offset, uint64_t length, uint64_t blksz,
320 const blkptr_t *bps, size_t nbps);
321 extern void zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx);
322 extern void zfs_upgrade(zfsvfs_t *zfsvfs, dmu_tx_t *tx);
323 extern void zfs_log_setsaxattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
324 znode_t *zp, const char *name, const void *value, size_t size);
325
326 extern void zfs_znode_update_vfs(struct znode *);
327
328 #endif
329 #ifdef __cplusplus
330 }
331 #endif
332
333 #endif /* _SYS_FS_ZFS_ZNODE_H */
334