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34dc7c2f BB |
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 | /* | |
d164b209 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
25 | ||
26 | /* Portions Copyright 2007 Jeremy Teo */ | |
27 | ||
34dc7c2f BB |
28 | #ifdef _KERNEL |
29 | #include <sys/types.h> | |
30 | #include <sys/param.h> | |
31 | #include <sys/time.h> | |
32 | #include <sys/systm.h> | |
33 | #include <sys/sysmacros.h> | |
34 | #include <sys/resource.h> | |
35 | #include <sys/mntent.h> | |
36 | #include <sys/mkdev.h> | |
37 | #include <sys/u8_textprep.h> | |
38 | #include <sys/dsl_dataset.h> | |
39 | #include <sys/vfs.h> | |
40 | #include <sys/vfs_opreg.h> | |
41 | #include <sys/vnode.h> | |
42 | #include <sys/file.h> | |
43 | #include <sys/kmem.h> | |
44 | #include <sys/errno.h> | |
45 | #include <sys/unistd.h> | |
46 | #include <sys/mode.h> | |
47 | #include <sys/atomic.h> | |
48 | #include <vm/pvn.h> | |
49 | #include "fs/fs_subr.h" | |
50 | #include <sys/zfs_dir.h> | |
51 | #include <sys/zfs_acl.h> | |
52 | #include <sys/zfs_ioctl.h> | |
53 | #include <sys/zfs_rlock.h> | |
54 | #include <sys/zfs_fuid.h> | |
55 | #include <sys/fs/zfs.h> | |
56 | #include <sys/kidmap.h> | |
57 | #endif /* _KERNEL */ | |
58 | ||
59 | #include <sys/dmu.h> | |
60 | #include <sys/refcount.h> | |
61 | #include <sys/stat.h> | |
62 | #include <sys/zap.h> | |
63 | #include <sys/zfs_znode.h> | |
64 | ||
65 | #include "zfs_prop.h" | |
66 | ||
b128c09f BB |
67 | /* |
68 | * Define ZNODE_STATS to turn on statistic gathering. By default, it is only | |
69 | * turned on when DEBUG is also defined. | |
70 | */ | |
71 | #ifdef DEBUG | |
72 | #define ZNODE_STATS | |
73 | #endif /* DEBUG */ | |
74 | ||
75 | #ifdef ZNODE_STATS | |
76 | #define ZNODE_STAT_ADD(stat) ((stat)++) | |
77 | #else | |
78 | #define ZNODE_STAT_ADD(stat) /* nothing */ | |
79 | #endif /* ZNODE_STATS */ | |
80 | ||
81 | #define POINTER_IS_VALID(p) (!((uintptr_t)(p) & 0x3)) | |
82 | #define POINTER_INVALIDATE(pp) (*(pp) = (void *)((uintptr_t)(*(pp)) | 0x1)) | |
83 | ||
34dc7c2f BB |
84 | /* |
85 | * Functions needed for userland (ie: libzpool) are not put under | |
86 | * #ifdef_KERNEL; the rest of the functions have dependencies | |
87 | * (such as VFS logic) that will not compile easily in userland. | |
88 | */ | |
89 | #ifdef _KERNEL | |
9babb374 BB |
90 | /* |
91 | * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to | |
92 | * be freed before it can be safely accessed. | |
93 | */ | |
94 | krwlock_t zfsvfs_lock; | |
95 | ||
b128c09f | 96 | static kmem_cache_t *znode_cache = NULL; |
34dc7c2f BB |
97 | |
98 | /*ARGSUSED*/ | |
99 | static void | |
100 | znode_evict_error(dmu_buf_t *dbuf, void *user_ptr) | |
101 | { | |
102 | /* | |
103 | * We should never drop all dbuf refs without first clearing | |
104 | * the eviction callback. | |
105 | */ | |
106 | panic("evicting znode %p\n", user_ptr); | |
107 | } | |
108 | ||
109 | /*ARGSUSED*/ | |
110 | static int | |
b128c09f | 111 | zfs_znode_cache_constructor(void *buf, void *arg, int kmflags) |
34dc7c2f BB |
112 | { |
113 | znode_t *zp = buf; | |
114 | ||
b128c09f BB |
115 | ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); |
116 | ||
117 | zp->z_vnode = vn_alloc(kmflags); | |
118 | if (zp->z_vnode == NULL) { | |
119 | return (-1); | |
120 | } | |
121 | ZTOV(zp)->v_data = zp; | |
122 | ||
123 | list_link_init(&zp->z_link_node); | |
124 | ||
34dc7c2f | 125 | mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f BB |
126 | rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL); |
127 | rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL); | |
128 | mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); | |
129 | ||
130 | mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL); | |
131 | avl_create(&zp->z_range_avl, zfs_range_compare, | |
132 | sizeof (rl_t), offsetof(rl_t, r_node)); | |
133 | ||
134 | zp->z_dbuf = NULL; | |
b128c09f | 135 | zp->z_dirlocks = NULL; |
34dc7c2f BB |
136 | return (0); |
137 | } | |
138 | ||
139 | /*ARGSUSED*/ | |
140 | static void | |
b128c09f | 141 | zfs_znode_cache_destructor(void *buf, void *arg) |
34dc7c2f BB |
142 | { |
143 | znode_t *zp = buf; | |
144 | ||
b128c09f BB |
145 | ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); |
146 | ASSERT(ZTOV(zp)->v_data == zp); | |
147 | vn_free(ZTOV(zp)); | |
148 | ASSERT(!list_link_active(&zp->z_link_node)); | |
34dc7c2f | 149 | mutex_destroy(&zp->z_lock); |
34dc7c2f BB |
150 | rw_destroy(&zp->z_parent_lock); |
151 | rw_destroy(&zp->z_name_lock); | |
152 | mutex_destroy(&zp->z_acl_lock); | |
153 | avl_destroy(&zp->z_range_avl); | |
154 | mutex_destroy(&zp->z_range_lock); | |
155 | ||
156 | ASSERT(zp->z_dbuf == NULL); | |
b128c09f BB |
157 | ASSERT(zp->z_dirlocks == NULL); |
158 | } | |
159 | ||
160 | #ifdef ZNODE_STATS | |
161 | static struct { | |
162 | uint64_t zms_zfsvfs_invalid; | |
9babb374 | 163 | uint64_t zms_zfsvfs_recheck1; |
b128c09f | 164 | uint64_t zms_zfsvfs_unmounted; |
9babb374 | 165 | uint64_t zms_zfsvfs_recheck2; |
b128c09f BB |
166 | uint64_t zms_obj_held; |
167 | uint64_t zms_vnode_locked; | |
168 | uint64_t zms_not_only_dnlc; | |
169 | } znode_move_stats; | |
170 | #endif /* ZNODE_STATS */ | |
171 | ||
172 | static void | |
173 | zfs_znode_move_impl(znode_t *ozp, znode_t *nzp) | |
174 | { | |
175 | vnode_t *vp; | |
176 | ||
177 | /* Copy fields. */ | |
178 | nzp->z_zfsvfs = ozp->z_zfsvfs; | |
179 | ||
180 | /* Swap vnodes. */ | |
181 | vp = nzp->z_vnode; | |
182 | nzp->z_vnode = ozp->z_vnode; | |
183 | ozp->z_vnode = vp; /* let destructor free the overwritten vnode */ | |
184 | ZTOV(ozp)->v_data = ozp; | |
185 | ZTOV(nzp)->v_data = nzp; | |
186 | ||
187 | nzp->z_id = ozp->z_id; | |
188 | ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */ | |
189 | ASSERT(avl_numnodes(&ozp->z_range_avl) == 0); | |
190 | nzp->z_unlinked = ozp->z_unlinked; | |
191 | nzp->z_atime_dirty = ozp->z_atime_dirty; | |
192 | nzp->z_zn_prefetch = ozp->z_zn_prefetch; | |
193 | nzp->z_blksz = ozp->z_blksz; | |
194 | nzp->z_seq = ozp->z_seq; | |
195 | nzp->z_mapcnt = ozp->z_mapcnt; | |
196 | nzp->z_last_itx = ozp->z_last_itx; | |
197 | nzp->z_gen = ozp->z_gen; | |
198 | nzp->z_sync_cnt = ozp->z_sync_cnt; | |
199 | nzp->z_phys = ozp->z_phys; | |
200 | nzp->z_dbuf = ozp->z_dbuf; | |
201 | ||
202 | /* Update back pointers. */ | |
203 | (void) dmu_buf_update_user(nzp->z_dbuf, ozp, nzp, &nzp->z_phys, | |
204 | znode_evict_error); | |
205 | ||
206 | /* | |
207 | * Invalidate the original znode by clearing fields that provide a | |
208 | * pointer back to the znode. Set the low bit of the vfs pointer to | |
209 | * ensure that zfs_znode_move() recognizes the znode as invalid in any | |
210 | * subsequent callback. | |
211 | */ | |
212 | ozp->z_dbuf = NULL; | |
213 | POINTER_INVALIDATE(&ozp->z_zfsvfs); | |
214 | } | |
215 | ||
b128c09f BB |
216 | /*ARGSUSED*/ |
217 | static kmem_cbrc_t | |
218 | zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg) | |
219 | { | |
220 | znode_t *ozp = buf, *nzp = newbuf; | |
221 | zfsvfs_t *zfsvfs; | |
222 | vnode_t *vp; | |
223 | ||
224 | /* | |
225 | * The znode is on the file system's list of known znodes if the vfs | |
226 | * pointer is valid. We set the low bit of the vfs pointer when freeing | |
227 | * the znode to invalidate it, and the memory patterns written by kmem | |
228 | * (baddcafe and deadbeef) set at least one of the two low bits. A newly | |
229 | * created znode sets the vfs pointer last of all to indicate that the | |
230 | * znode is known and in a valid state to be moved by this function. | |
231 | */ | |
232 | zfsvfs = ozp->z_zfsvfs; | |
233 | if (!POINTER_IS_VALID(zfsvfs)) { | |
234 | ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid); | |
235 | return (KMEM_CBRC_DONT_KNOW); | |
236 | } | |
237 | ||
238 | /* | |
9babb374 BB |
239 | * Close a small window in which it's possible that the filesystem could |
240 | * be unmounted and freed, and zfsvfs, though valid in the previous | |
241 | * statement, could point to unrelated memory by the time we try to | |
242 | * prevent the filesystem from being unmounted. | |
243 | */ | |
244 | rw_enter(&zfsvfs_lock, RW_WRITER); | |
245 | if (zfsvfs != ozp->z_zfsvfs) { | |
246 | rw_exit(&zfsvfs_lock); | |
247 | ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1); | |
248 | return (KMEM_CBRC_DONT_KNOW); | |
249 | } | |
250 | ||
251 | /* | |
252 | * If the znode is still valid, then so is the file system. We know that | |
253 | * no valid file system can be freed while we hold zfsvfs_lock, so we | |
254 | * can safely ensure that the filesystem is not and will not be | |
255 | * unmounted. The next statement is equivalent to ZFS_ENTER(). | |
b128c09f | 256 | */ |
9babb374 BB |
257 | rrw_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG); |
258 | if (zfsvfs->z_unmounted) { | |
259 | ZFS_EXIT(zfsvfs); | |
260 | rw_exit(&zfsvfs_lock); | |
b128c09f BB |
261 | ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted); |
262 | return (KMEM_CBRC_DONT_KNOW); | |
263 | } | |
9babb374 | 264 | rw_exit(&zfsvfs_lock); |
b128c09f BB |
265 | |
266 | mutex_enter(&zfsvfs->z_znodes_lock); | |
267 | /* | |
268 | * Recheck the vfs pointer in case the znode was removed just before | |
269 | * acquiring the lock. | |
270 | */ | |
271 | if (zfsvfs != ozp->z_zfsvfs) { | |
272 | mutex_exit(&zfsvfs->z_znodes_lock); | |
273 | ZFS_EXIT(zfsvfs); | |
9babb374 | 274 | ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2); |
b128c09f BB |
275 | return (KMEM_CBRC_DONT_KNOW); |
276 | } | |
277 | ||
278 | /* | |
279 | * At this point we know that as long as we hold z_znodes_lock, the | |
280 | * znode cannot be freed and fields within the znode can be safely | |
281 | * accessed. Now, prevent a race with zfs_zget(). | |
282 | */ | |
283 | if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) { | |
284 | mutex_exit(&zfsvfs->z_znodes_lock); | |
285 | ZFS_EXIT(zfsvfs); | |
286 | ZNODE_STAT_ADD(znode_move_stats.zms_obj_held); | |
287 | return (KMEM_CBRC_LATER); | |
288 | } | |
289 | ||
290 | vp = ZTOV(ozp); | |
291 | if (mutex_tryenter(&vp->v_lock) == 0) { | |
292 | ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); | |
293 | mutex_exit(&zfsvfs->z_znodes_lock); | |
294 | ZFS_EXIT(zfsvfs); | |
295 | ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked); | |
296 | return (KMEM_CBRC_LATER); | |
297 | } | |
298 | ||
299 | /* Only move znodes that are referenced _only_ by the DNLC. */ | |
300 | if (vp->v_count != 1 || !vn_in_dnlc(vp)) { | |
301 | mutex_exit(&vp->v_lock); | |
302 | ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); | |
303 | mutex_exit(&zfsvfs->z_znodes_lock); | |
304 | ZFS_EXIT(zfsvfs); | |
305 | ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc); | |
306 | return (KMEM_CBRC_LATER); | |
307 | } | |
308 | ||
309 | /* | |
310 | * The znode is known and in a valid state to move. We're holding the | |
311 | * locks needed to execute the critical section. | |
312 | */ | |
313 | zfs_znode_move_impl(ozp, nzp); | |
314 | mutex_exit(&vp->v_lock); | |
315 | ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); | |
316 | ||
317 | list_link_replace(&ozp->z_link_node, &nzp->z_link_node); | |
318 | mutex_exit(&zfsvfs->z_znodes_lock); | |
319 | ZFS_EXIT(zfsvfs); | |
320 | ||
321 | return (KMEM_CBRC_YES); | |
34dc7c2f BB |
322 | } |
323 | ||
324 | void | |
325 | zfs_znode_init(void) | |
326 | { | |
327 | /* | |
328 | * Initialize zcache | |
329 | */ | |
9babb374 | 330 | rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL); |
34dc7c2f BB |
331 | ASSERT(znode_cache == NULL); |
332 | znode_cache = kmem_cache_create("zfs_znode_cache", | |
333 | sizeof (znode_t), 0, zfs_znode_cache_constructor, | |
334 | zfs_znode_cache_destructor, NULL, NULL, NULL, 0); | |
b128c09f | 335 | kmem_cache_set_move(znode_cache, zfs_znode_move); |
34dc7c2f BB |
336 | } |
337 | ||
338 | void | |
339 | zfs_znode_fini(void) | |
340 | { | |
341 | /* | |
342 | * Cleanup vfs & vnode ops | |
343 | */ | |
344 | zfs_remove_op_tables(); | |
345 | ||
346 | /* | |
347 | * Cleanup zcache | |
348 | */ | |
349 | if (znode_cache) | |
350 | kmem_cache_destroy(znode_cache); | |
351 | znode_cache = NULL; | |
9babb374 | 352 | rw_destroy(&zfsvfs_lock); |
34dc7c2f BB |
353 | } |
354 | ||
355 | struct vnodeops *zfs_dvnodeops; | |
356 | struct vnodeops *zfs_fvnodeops; | |
357 | struct vnodeops *zfs_symvnodeops; | |
358 | struct vnodeops *zfs_xdvnodeops; | |
359 | struct vnodeops *zfs_evnodeops; | |
9babb374 | 360 | struct vnodeops *zfs_sharevnodeops; |
34dc7c2f BB |
361 | |
362 | void | |
363 | zfs_remove_op_tables() | |
364 | { | |
365 | /* | |
366 | * Remove vfs ops | |
367 | */ | |
368 | ASSERT(zfsfstype); | |
369 | (void) vfs_freevfsops_by_type(zfsfstype); | |
370 | zfsfstype = 0; | |
371 | ||
372 | /* | |
373 | * Remove vnode ops | |
374 | */ | |
375 | if (zfs_dvnodeops) | |
376 | vn_freevnodeops(zfs_dvnodeops); | |
377 | if (zfs_fvnodeops) | |
378 | vn_freevnodeops(zfs_fvnodeops); | |
379 | if (zfs_symvnodeops) | |
380 | vn_freevnodeops(zfs_symvnodeops); | |
381 | if (zfs_xdvnodeops) | |
382 | vn_freevnodeops(zfs_xdvnodeops); | |
383 | if (zfs_evnodeops) | |
384 | vn_freevnodeops(zfs_evnodeops); | |
9babb374 BB |
385 | if (zfs_sharevnodeops) |
386 | vn_freevnodeops(zfs_sharevnodeops); | |
34dc7c2f BB |
387 | |
388 | zfs_dvnodeops = NULL; | |
389 | zfs_fvnodeops = NULL; | |
390 | zfs_symvnodeops = NULL; | |
391 | zfs_xdvnodeops = NULL; | |
392 | zfs_evnodeops = NULL; | |
9babb374 | 393 | zfs_sharevnodeops = NULL; |
34dc7c2f BB |
394 | } |
395 | ||
396 | extern const fs_operation_def_t zfs_dvnodeops_template[]; | |
397 | extern const fs_operation_def_t zfs_fvnodeops_template[]; | |
398 | extern const fs_operation_def_t zfs_xdvnodeops_template[]; | |
399 | extern const fs_operation_def_t zfs_symvnodeops_template[]; | |
400 | extern const fs_operation_def_t zfs_evnodeops_template[]; | |
9babb374 | 401 | extern const fs_operation_def_t zfs_sharevnodeops_template[]; |
34dc7c2f BB |
402 | |
403 | int | |
404 | zfs_create_op_tables() | |
405 | { | |
406 | int error; | |
407 | ||
408 | /* | |
409 | * zfs_dvnodeops can be set if mod_remove() calls mod_installfs() | |
410 | * due to a failure to remove the the 2nd modlinkage (zfs_modldrv). | |
411 | * In this case we just return as the ops vectors are already set up. | |
412 | */ | |
413 | if (zfs_dvnodeops) | |
414 | return (0); | |
415 | ||
416 | error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template, | |
417 | &zfs_dvnodeops); | |
418 | if (error) | |
419 | return (error); | |
420 | ||
421 | error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template, | |
422 | &zfs_fvnodeops); | |
423 | if (error) | |
424 | return (error); | |
425 | ||
426 | error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template, | |
427 | &zfs_symvnodeops); | |
428 | if (error) | |
429 | return (error); | |
430 | ||
431 | error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template, | |
432 | &zfs_xdvnodeops); | |
433 | if (error) | |
434 | return (error); | |
435 | ||
436 | error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template, | |
437 | &zfs_evnodeops); | |
9babb374 BB |
438 | if (error) |
439 | return (error); | |
440 | ||
441 | error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template, | |
442 | &zfs_sharevnodeops); | |
34dc7c2f BB |
443 | |
444 | return (error); | |
445 | } | |
446 | ||
34dc7c2f | 447 | int |
9babb374 | 448 | zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
34dc7c2f | 449 | { |
9babb374 BB |
450 | zfs_acl_ids_t acl_ids; |
451 | vattr_t vattr; | |
452 | znode_t *sharezp; | |
453 | vnode_t *vp; | |
454 | znode_t *zp; | |
455 | int error; | |
34dc7c2f | 456 | |
9babb374 BB |
457 | vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; |
458 | vattr.va_type = VDIR; | |
459 | vattr.va_mode = S_IFDIR|0555; | |
460 | vattr.va_uid = crgetuid(kcred); | |
461 | vattr.va_gid = crgetgid(kcred); | |
34dc7c2f | 462 | |
9babb374 BB |
463 | sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP); |
464 | sharezp->z_unlinked = 0; | |
465 | sharezp->z_atime_dirty = 0; | |
466 | sharezp->z_zfsvfs = zfsvfs; | |
34dc7c2f | 467 | |
9babb374 BB |
468 | vp = ZTOV(sharezp); |
469 | vn_reinit(vp); | |
470 | vp->v_type = VDIR; | |
34dc7c2f | 471 | |
9babb374 BB |
472 | VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr, |
473 | kcred, NULL, &acl_ids)); | |
474 | zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, | |
475 | &zp, 0, &acl_ids); | |
476 | ASSERT3P(zp, ==, sharezp); | |
477 | ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */ | |
478 | POINTER_INVALIDATE(&sharezp->z_zfsvfs); | |
479 | error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, | |
480 | ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx); | |
481 | zfsvfs->z_shares_dir = sharezp->z_id; | |
482 | ||
483 | zfs_acl_ids_free(&acl_ids); | |
484 | ZTOV(sharezp)->v_count = 0; | |
485 | dmu_buf_rele(sharezp->z_dbuf, NULL); | |
486 | sharezp->z_dbuf = NULL; | |
487 | kmem_cache_free(znode_cache, sharezp); | |
34dc7c2f | 488 | |
9babb374 | 489 | return (error); |
34dc7c2f BB |
490 | } |
491 | ||
492 | /* | |
493 | * define a couple of values we need available | |
494 | * for both 64 and 32 bit environments. | |
495 | */ | |
496 | #ifndef NBITSMINOR64 | |
497 | #define NBITSMINOR64 32 | |
498 | #endif | |
499 | #ifndef MAXMAJ64 | |
500 | #define MAXMAJ64 0xffffffffUL | |
501 | #endif | |
502 | #ifndef MAXMIN64 | |
503 | #define MAXMIN64 0xffffffffUL | |
504 | #endif | |
505 | ||
506 | /* | |
507 | * Create special expldev for ZFS private use. | |
508 | * Can't use standard expldev since it doesn't do | |
509 | * what we want. The standard expldev() takes a | |
510 | * dev32_t in LP64 and expands it to a long dev_t. | |
511 | * We need an interface that takes a dev32_t in ILP32 | |
512 | * and expands it to a long dev_t. | |
513 | */ | |
514 | static uint64_t | |
515 | zfs_expldev(dev_t dev) | |
516 | { | |
517 | #ifndef _LP64 | |
518 | major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32; | |
519 | return (((uint64_t)major << NBITSMINOR64) | | |
520 | ((minor_t)dev & MAXMIN32)); | |
521 | #else | |
522 | return (dev); | |
523 | #endif | |
524 | } | |
525 | ||
526 | /* | |
527 | * Special cmpldev for ZFS private use. | |
528 | * Can't use standard cmpldev since it takes | |
529 | * a long dev_t and compresses it to dev32_t in | |
530 | * LP64. We need to do a compaction of a long dev_t | |
531 | * to a dev32_t in ILP32. | |
532 | */ | |
533 | dev_t | |
534 | zfs_cmpldev(uint64_t dev) | |
535 | { | |
536 | #ifndef _LP64 | |
537 | minor_t minor = (minor_t)dev & MAXMIN64; | |
538 | major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64; | |
539 | ||
540 | if (major > MAXMAJ32 || minor > MAXMIN32) | |
541 | return (NODEV32); | |
542 | ||
543 | return (((dev32_t)major << NBITSMINOR32) | minor); | |
544 | #else | |
545 | return (dev); | |
546 | #endif | |
547 | } | |
548 | ||
549 | static void | |
b128c09f | 550 | zfs_znode_dmu_init(zfsvfs_t *zfsvfs, znode_t *zp, dmu_buf_t *db) |
34dc7c2f BB |
551 | { |
552 | znode_t *nzp; | |
34dc7c2f | 553 | |
b128c09f BB |
554 | ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs)); |
555 | ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id))); | |
34dc7c2f BB |
556 | |
557 | mutex_enter(&zp->z_lock); | |
558 | ||
559 | ASSERT(zp->z_dbuf == NULL); | |
560 | zp->z_dbuf = db; | |
561 | nzp = dmu_buf_set_user_ie(db, zp, &zp->z_phys, znode_evict_error); | |
562 | ||
563 | /* | |
564 | * there should be no | |
565 | * concurrent zgets on this object. | |
566 | */ | |
567 | if (nzp != NULL) | |
b128c09f | 568 | panic("existing znode %p for dbuf %p", (void *)nzp, (void *)db); |
34dc7c2f BB |
569 | |
570 | /* | |
571 | * Slap on VROOT if we are the root znode | |
572 | */ | |
573 | if (zp->z_id == zfsvfs->z_root) | |
574 | ZTOV(zp)->v_flag |= VROOT; | |
575 | ||
576 | mutex_exit(&zp->z_lock); | |
577 | vn_exists(ZTOV(zp)); | |
578 | } | |
579 | ||
580 | void | |
581 | zfs_znode_dmu_fini(znode_t *zp) | |
582 | { | |
583 | dmu_buf_t *db = zp->z_dbuf; | |
b128c09f BB |
584 | ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) || |
585 | zp->z_unlinked || | |
34dc7c2f BB |
586 | RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock)); |
587 | ASSERT(zp->z_dbuf != NULL); | |
588 | zp->z_dbuf = NULL; | |
589 | VERIFY(zp == dmu_buf_update_user(db, zp, NULL, NULL, NULL)); | |
590 | dmu_buf_rele(db, NULL); | |
591 | } | |
592 | ||
593 | /* | |
594 | * Construct a new znode/vnode and intialize. | |
595 | * | |
596 | * This does not do a call to dmu_set_user() that is | |
597 | * up to the caller to do, in case you don't want to | |
598 | * return the znode | |
599 | */ | |
600 | static znode_t * | |
601 | zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz) | |
602 | { | |
603 | znode_t *zp; | |
604 | vnode_t *vp; | |
605 | ||
606 | zp = kmem_cache_alloc(znode_cache, KM_SLEEP); | |
607 | ||
608 | ASSERT(zp->z_dirlocks == NULL); | |
609 | ASSERT(zp->z_dbuf == NULL); | |
b128c09f | 610 | ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); |
34dc7c2f | 611 | |
b128c09f BB |
612 | /* |
613 | * Defer setting z_zfsvfs until the znode is ready to be a candidate for | |
614 | * the zfs_znode_move() callback. | |
615 | */ | |
34dc7c2f | 616 | zp->z_phys = NULL; |
34dc7c2f BB |
617 | zp->z_unlinked = 0; |
618 | zp->z_atime_dirty = 0; | |
619 | zp->z_mapcnt = 0; | |
620 | zp->z_last_itx = 0; | |
621 | zp->z_id = db->db_object; | |
622 | zp->z_blksz = blksz; | |
623 | zp->z_seq = 0x7A4653; | |
624 | zp->z_sync_cnt = 0; | |
625 | ||
626 | vp = ZTOV(zp); | |
627 | vn_reinit(vp); | |
628 | ||
b128c09f | 629 | zfs_znode_dmu_init(zfsvfs, zp, db); |
34dc7c2f BB |
630 | |
631 | zp->z_gen = zp->z_phys->zp_gen; | |
632 | ||
34dc7c2f BB |
633 | vp->v_vfsp = zfsvfs->z_parent->z_vfs; |
634 | vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode); | |
635 | ||
636 | switch (vp->v_type) { | |
637 | case VDIR: | |
638 | if (zp->z_phys->zp_flags & ZFS_XATTR) { | |
639 | vn_setops(vp, zfs_xdvnodeops); | |
640 | vp->v_flag |= V_XATTRDIR; | |
641 | } else { | |
642 | vn_setops(vp, zfs_dvnodeops); | |
643 | } | |
644 | zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ | |
645 | break; | |
646 | case VBLK: | |
647 | case VCHR: | |
648 | vp->v_rdev = zfs_cmpldev(zp->z_phys->zp_rdev); | |
649 | /*FALLTHROUGH*/ | |
650 | case VFIFO: | |
651 | case VSOCK: | |
652 | case VDOOR: | |
653 | vn_setops(vp, zfs_fvnodeops); | |
654 | break; | |
655 | case VREG: | |
656 | vp->v_flag |= VMODSORT; | |
9babb374 BB |
657 | if (zp->z_phys->zp_parent == zfsvfs->z_shares_dir) |
658 | vn_setops(vp, zfs_sharevnodeops); | |
659 | else | |
660 | vn_setops(vp, zfs_fvnodeops); | |
34dc7c2f BB |
661 | break; |
662 | case VLNK: | |
663 | vn_setops(vp, zfs_symvnodeops); | |
664 | break; | |
665 | default: | |
666 | vn_setops(vp, zfs_evnodeops); | |
667 | break; | |
668 | } | |
669 | ||
b128c09f BB |
670 | mutex_enter(&zfsvfs->z_znodes_lock); |
671 | list_insert_tail(&zfsvfs->z_all_znodes, zp); | |
672 | membar_producer(); | |
673 | /* | |
674 | * Everything else must be valid before assigning z_zfsvfs makes the | |
675 | * znode eligible for zfs_znode_move(). | |
676 | */ | |
677 | zp->z_zfsvfs = zfsvfs; | |
678 | mutex_exit(&zfsvfs->z_znodes_lock); | |
679 | ||
34dc7c2f BB |
680 | VFS_HOLD(zfsvfs->z_vfs); |
681 | return (zp); | |
682 | } | |
683 | ||
684 | /* | |
685 | * Create a new DMU object to hold a zfs znode. | |
686 | * | |
687 | * IN: dzp - parent directory for new znode | |
688 | * vap - file attributes for new znode | |
689 | * tx - dmu transaction id for zap operations | |
690 | * cr - credentials of caller | |
691 | * flag - flags: | |
692 | * IS_ROOT_NODE - new object will be root | |
693 | * IS_XATTR - new object is an attribute | |
694 | * IS_REPLAY - intent log replay | |
695 | * bonuslen - length of bonus buffer | |
696 | * setaclp - File/Dir initial ACL | |
697 | * fuidp - Tracks fuid allocation. | |
698 | * | |
699 | * OUT: zpp - allocated znode | |
700 | * | |
701 | */ | |
702 | void | |
703 | zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr, | |
9babb374 | 704 | uint_t flag, znode_t **zpp, int bonuslen, zfs_acl_ids_t *acl_ids) |
34dc7c2f BB |
705 | { |
706 | dmu_buf_t *db; | |
707 | znode_phys_t *pzp; | |
708 | zfsvfs_t *zfsvfs = dzp->z_zfsvfs; | |
709 | timestruc_t now; | |
710 | uint64_t gen, obj; | |
711 | int err; | |
712 | ||
713 | ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); | |
714 | ||
fb5f0bc8 | 715 | if (zfsvfs->z_replay) { |
34dc7c2f BB |
716 | obj = vap->va_nodeid; |
717 | flag |= IS_REPLAY; | |
718 | now = vap->va_ctime; /* see zfs_replay_create() */ | |
719 | gen = vap->va_nblocks; /* ditto */ | |
720 | } else { | |
721 | obj = 0; | |
722 | gethrestime(&now); | |
723 | gen = dmu_tx_get_txg(tx); | |
724 | } | |
725 | ||
726 | /* | |
727 | * Create a new DMU object. | |
728 | */ | |
729 | /* | |
730 | * There's currently no mechanism for pre-reading the blocks that will | |
731 | * be to needed allocate a new object, so we accept the small chance | |
732 | * that there will be an i/o error and we will fail one of the | |
733 | * assertions below. | |
734 | */ | |
735 | if (vap->va_type == VDIR) { | |
736 | if (flag & IS_REPLAY) { | |
737 | err = zap_create_claim_norm(zfsvfs->z_os, obj, | |
738 | zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, | |
739 | DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); | |
740 | ASSERT3U(err, ==, 0); | |
741 | } else { | |
742 | obj = zap_create_norm(zfsvfs->z_os, | |
743 | zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, | |
744 | DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); | |
745 | } | |
746 | } else { | |
747 | if (flag & IS_REPLAY) { | |
748 | err = dmu_object_claim(zfsvfs->z_os, obj, | |
749 | DMU_OT_PLAIN_FILE_CONTENTS, 0, | |
750 | DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); | |
751 | ASSERT3U(err, ==, 0); | |
752 | } else { | |
753 | obj = dmu_object_alloc(zfsvfs->z_os, | |
754 | DMU_OT_PLAIN_FILE_CONTENTS, 0, | |
755 | DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); | |
756 | } | |
757 | } | |
758 | VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, obj, NULL, &db)); | |
759 | dmu_buf_will_dirty(db, tx); | |
760 | ||
761 | /* | |
762 | * Initialize the znode physical data to zero. | |
763 | */ | |
764 | ASSERT(db->db_size >= sizeof (znode_phys_t)); | |
765 | bzero(db->db_data, db->db_size); | |
766 | pzp = db->db_data; | |
767 | ||
768 | /* | |
769 | * If this is the root, fix up the half-initialized parent pointer | |
770 | * to reference the just-allocated physical data area. | |
771 | */ | |
772 | if (flag & IS_ROOT_NODE) { | |
773 | dzp->z_dbuf = db; | |
774 | dzp->z_phys = pzp; | |
775 | dzp->z_id = obj; | |
776 | } | |
777 | ||
778 | /* | |
779 | * If parent is an xattr, so am I. | |
780 | */ | |
781 | if (dzp->z_phys->zp_flags & ZFS_XATTR) | |
782 | flag |= IS_XATTR; | |
783 | ||
784 | if (vap->va_type == VBLK || vap->va_type == VCHR) { | |
785 | pzp->zp_rdev = zfs_expldev(vap->va_rdev); | |
786 | } | |
787 | ||
788 | if (zfsvfs->z_use_fuids) | |
789 | pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED; | |
790 | ||
791 | if (vap->va_type == VDIR) { | |
792 | pzp->zp_size = 2; /* contents ("." and "..") */ | |
793 | pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1; | |
794 | } | |
795 | ||
796 | pzp->zp_parent = dzp->z_id; | |
797 | if (flag & IS_XATTR) | |
798 | pzp->zp_flags |= ZFS_XATTR; | |
799 | ||
800 | pzp->zp_gen = gen; | |
801 | ||
802 | ZFS_TIME_ENCODE(&now, pzp->zp_crtime); | |
803 | ZFS_TIME_ENCODE(&now, pzp->zp_ctime); | |
804 | ||
805 | if (vap->va_mask & AT_ATIME) { | |
806 | ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); | |
807 | } else { | |
808 | ZFS_TIME_ENCODE(&now, pzp->zp_atime); | |
809 | } | |
810 | ||
811 | if (vap->va_mask & AT_MTIME) { | |
812 | ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); | |
813 | } else { | |
814 | ZFS_TIME_ENCODE(&now, pzp->zp_mtime); | |
815 | } | |
816 | ||
817 | pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode); | |
818 | if (!(flag & IS_ROOT_NODE)) { | |
b128c09f | 819 | ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); |
34dc7c2f BB |
820 | *zpp = zfs_znode_alloc(zfsvfs, db, 0); |
821 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); | |
822 | } else { | |
823 | /* | |
824 | * If we are creating the root node, the "parent" we | |
825 | * passed in is the znode for the root. | |
826 | */ | |
827 | *zpp = dzp; | |
828 | } | |
9babb374 BB |
829 | pzp->zp_uid = acl_ids->z_fuid; |
830 | pzp->zp_gid = acl_ids->z_fgid; | |
831 | pzp->zp_mode = acl_ids->z_mode; | |
832 | VERIFY(0 == zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx)); | |
833 | if (vap->va_mask & AT_XVATTR) | |
834 | zfs_xvattr_set(*zpp, (xvattr_t *)vap); | |
34dc7c2f BB |
835 | } |
836 | ||
837 | void | |
838 | zfs_xvattr_set(znode_t *zp, xvattr_t *xvap) | |
839 | { | |
840 | xoptattr_t *xoap; | |
841 | ||
842 | xoap = xva_getxoptattr(xvap); | |
843 | ASSERT(xoap); | |
844 | ||
845 | if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { | |
846 | ZFS_TIME_ENCODE(&xoap->xoa_createtime, zp->z_phys->zp_crtime); | |
847 | XVA_SET_RTN(xvap, XAT_CREATETIME); | |
848 | } | |
849 | if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { | |
850 | ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly); | |
851 | XVA_SET_RTN(xvap, XAT_READONLY); | |
852 | } | |
853 | if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { | |
854 | ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden); | |
855 | XVA_SET_RTN(xvap, XAT_HIDDEN); | |
856 | } | |
857 | if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { | |
858 | ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system); | |
859 | XVA_SET_RTN(xvap, XAT_SYSTEM); | |
860 | } | |
861 | if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { | |
862 | ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive); | |
863 | XVA_SET_RTN(xvap, XAT_ARCHIVE); | |
864 | } | |
865 | if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { | |
866 | ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable); | |
867 | XVA_SET_RTN(xvap, XAT_IMMUTABLE); | |
868 | } | |
869 | if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { | |
870 | ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink); | |
871 | XVA_SET_RTN(xvap, XAT_NOUNLINK); | |
872 | } | |
873 | if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { | |
874 | ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly); | |
875 | XVA_SET_RTN(xvap, XAT_APPENDONLY); | |
876 | } | |
877 | if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { | |
878 | ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump); | |
879 | XVA_SET_RTN(xvap, XAT_NODUMP); | |
880 | } | |
881 | if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { | |
882 | ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque); | |
883 | XVA_SET_RTN(xvap, XAT_OPAQUE); | |
884 | } | |
885 | if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { | |
886 | ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED, | |
887 | xoap->xoa_av_quarantined); | |
888 | XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); | |
889 | } | |
890 | if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { | |
891 | ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified); | |
892 | XVA_SET_RTN(xvap, XAT_AV_MODIFIED); | |
893 | } | |
894 | if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { | |
895 | (void) memcpy(zp->z_phys + 1, xoap->xoa_av_scanstamp, | |
896 | sizeof (xoap->xoa_av_scanstamp)); | |
897 | zp->z_phys->zp_flags |= ZFS_BONUS_SCANSTAMP; | |
898 | XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); | |
899 | } | |
900 | } | |
901 | ||
902 | int | |
903 | zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp) | |
904 | { | |
905 | dmu_object_info_t doi; | |
906 | dmu_buf_t *db; | |
907 | znode_t *zp; | |
908 | int err; | |
909 | ||
910 | *zpp = NULL; | |
911 | ||
912 | ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); | |
913 | ||
914 | err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); | |
915 | if (err) { | |
916 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
917 | return (err); | |
918 | } | |
919 | ||
920 | dmu_object_info_from_db(db, &doi); | |
921 | if (doi.doi_bonus_type != DMU_OT_ZNODE || | |
922 | doi.doi_bonus_size < sizeof (znode_phys_t)) { | |
923 | dmu_buf_rele(db, NULL); | |
924 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
925 | return (EINVAL); | |
926 | } | |
927 | ||
928 | zp = dmu_buf_get_user(db); | |
929 | if (zp != NULL) { | |
930 | mutex_enter(&zp->z_lock); | |
931 | ||
932 | /* | |
933 | * Since we do immediate eviction of the z_dbuf, we | |
934 | * should never find a dbuf with a znode that doesn't | |
935 | * know about the dbuf. | |
936 | */ | |
937 | ASSERT3P(zp->z_dbuf, ==, db); | |
938 | ASSERT3U(zp->z_id, ==, obj_num); | |
939 | if (zp->z_unlinked) { | |
940 | err = ENOENT; | |
941 | } else { | |
942 | VN_HOLD(ZTOV(zp)); | |
943 | *zpp = zp; | |
944 | err = 0; | |
945 | } | |
946 | dmu_buf_rele(db, NULL); | |
947 | mutex_exit(&zp->z_lock); | |
948 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
949 | return (err); | |
950 | } | |
951 | ||
952 | /* | |
953 | * Not found create new znode/vnode | |
954 | */ | |
955 | zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size); | |
956 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
957 | *zpp = zp; | |
958 | return (0); | |
959 | } | |
960 | ||
961 | int | |
962 | zfs_rezget(znode_t *zp) | |
963 | { | |
964 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
965 | dmu_object_info_t doi; | |
966 | dmu_buf_t *db; | |
967 | uint64_t obj_num = zp->z_id; | |
968 | int err; | |
969 | ||
970 | ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); | |
971 | ||
972 | err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); | |
973 | if (err) { | |
974 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
975 | return (err); | |
976 | } | |
977 | ||
978 | dmu_object_info_from_db(db, &doi); | |
979 | if (doi.doi_bonus_type != DMU_OT_ZNODE || | |
980 | doi.doi_bonus_size < sizeof (znode_phys_t)) { | |
981 | dmu_buf_rele(db, NULL); | |
982 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
983 | return (EINVAL); | |
984 | } | |
985 | ||
986 | if (((znode_phys_t *)db->db_data)->zp_gen != zp->z_gen) { | |
987 | dmu_buf_rele(db, NULL); | |
988 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
989 | return (EIO); | |
990 | } | |
991 | ||
b128c09f | 992 | zfs_znode_dmu_init(zfsvfs, zp, db); |
34dc7c2f BB |
993 | zp->z_unlinked = (zp->z_phys->zp_links == 0); |
994 | zp->z_blksz = doi.doi_data_block_size; | |
995 | ||
996 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); | |
997 | ||
998 | return (0); | |
999 | } | |
1000 | ||
1001 | void | |
1002 | zfs_znode_delete(znode_t *zp, dmu_tx_t *tx) | |
1003 | { | |
1004 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
b128c09f | 1005 | objset_t *os = zfsvfs->z_os; |
34dc7c2f | 1006 | uint64_t obj = zp->z_id; |
b128c09f | 1007 | uint64_t acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj; |
34dc7c2f BB |
1008 | |
1009 | ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); | |
b128c09f BB |
1010 | if (acl_obj) |
1011 | VERIFY(0 == dmu_object_free(os, acl_obj, tx)); | |
1012 | VERIFY(0 == dmu_object_free(os, obj, tx)); | |
34dc7c2f BB |
1013 | zfs_znode_dmu_fini(zp); |
1014 | ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); | |
1015 | zfs_znode_free(zp); | |
1016 | } | |
1017 | ||
1018 | void | |
1019 | zfs_zinactive(znode_t *zp) | |
1020 | { | |
1021 | vnode_t *vp = ZTOV(zp); | |
1022 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1023 | uint64_t z_id = zp->z_id; | |
1024 | ||
1025 | ASSERT(zp->z_dbuf && zp->z_phys); | |
1026 | ||
1027 | /* | |
1028 | * Don't allow a zfs_zget() while were trying to release this znode | |
1029 | */ | |
1030 | ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); | |
1031 | ||
1032 | mutex_enter(&zp->z_lock); | |
1033 | mutex_enter(&vp->v_lock); | |
1034 | vp->v_count--; | |
1035 | if (vp->v_count > 0 || vn_has_cached_data(vp)) { | |
1036 | /* | |
1037 | * If the hold count is greater than zero, somebody has | |
1038 | * obtained a new reference on this znode while we were | |
1039 | * processing it here, so we are done. If we still have | |
1040 | * mapped pages then we are also done, since we don't | |
1041 | * want to inactivate the znode until the pages get pushed. | |
1042 | * | |
1043 | * XXX - if vn_has_cached_data(vp) is true, but count == 0, | |
1044 | * this seems like it would leave the znode hanging with | |
1045 | * no chance to go inactive... | |
1046 | */ | |
1047 | mutex_exit(&vp->v_lock); | |
1048 | mutex_exit(&zp->z_lock); | |
1049 | ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); | |
1050 | return; | |
1051 | } | |
1052 | mutex_exit(&vp->v_lock); | |
1053 | ||
1054 | /* | |
1055 | * If this was the last reference to a file with no links, | |
1056 | * remove the file from the file system. | |
1057 | */ | |
1058 | if (zp->z_unlinked) { | |
1059 | mutex_exit(&zp->z_lock); | |
1060 | ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); | |
1061 | zfs_rmnode(zp); | |
1062 | return; | |
1063 | } | |
1064 | mutex_exit(&zp->z_lock); | |
1065 | zfs_znode_dmu_fini(zp); | |
1066 | ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); | |
1067 | zfs_znode_free(zp); | |
1068 | } | |
1069 | ||
1070 | void | |
1071 | zfs_znode_free(znode_t *zp) | |
1072 | { | |
1073 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1074 | ||
1075 | vn_invalid(ZTOV(zp)); | |
1076 | ||
b128c09f BB |
1077 | ASSERT(ZTOV(zp)->v_count == 0); |
1078 | ||
34dc7c2f | 1079 | mutex_enter(&zfsvfs->z_znodes_lock); |
b128c09f | 1080 | POINTER_INVALIDATE(&zp->z_zfsvfs); |
34dc7c2f BB |
1081 | list_remove(&zfsvfs->z_all_znodes, zp); |
1082 | mutex_exit(&zfsvfs->z_znodes_lock); | |
1083 | ||
1084 | kmem_cache_free(znode_cache, zp); | |
1085 | ||
1086 | VFS_RELE(zfsvfs->z_vfs); | |
1087 | } | |
1088 | ||
1089 | void | |
1090 | zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx) | |
1091 | { | |
1092 | timestruc_t now; | |
1093 | ||
1094 | ASSERT(MUTEX_HELD(&zp->z_lock)); | |
1095 | ||
1096 | gethrestime(&now); | |
1097 | ||
1098 | if (tx) { | |
1099 | dmu_buf_will_dirty(zp->z_dbuf, tx); | |
1100 | zp->z_atime_dirty = 0; | |
1101 | zp->z_seq++; | |
1102 | } else { | |
1103 | zp->z_atime_dirty = 1; | |
1104 | } | |
1105 | ||
1106 | if (flag & AT_ATIME) | |
1107 | ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime); | |
1108 | ||
1109 | if (flag & AT_MTIME) { | |
1110 | ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime); | |
1111 | if (zp->z_zfsvfs->z_use_fuids) | |
1112 | zp->z_phys->zp_flags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED); | |
1113 | } | |
1114 | ||
1115 | if (flag & AT_CTIME) { | |
1116 | ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime); | |
1117 | if (zp->z_zfsvfs->z_use_fuids) | |
1118 | zp->z_phys->zp_flags |= ZFS_ARCHIVE; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Update the requested znode timestamps with the current time. | |
1124 | * If we are in a transaction, then go ahead and mark the znode | |
1125 | * dirty in the transaction so the timestamps will go to disk. | |
1126 | * Otherwise, we will get pushed next time the znode is updated | |
1127 | * in a transaction, or when this znode eventually goes inactive. | |
1128 | * | |
1129 | * Why is this OK? | |
1130 | * 1 - Only the ACCESS time is ever updated outside of a transaction. | |
1131 | * 2 - Multiple consecutive updates will be collapsed into a single | |
1132 | * znode update by the transaction grouping semantics of the DMU. | |
1133 | */ | |
1134 | void | |
1135 | zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx) | |
1136 | { | |
1137 | mutex_enter(&zp->z_lock); | |
1138 | zfs_time_stamper_locked(zp, flag, tx); | |
1139 | mutex_exit(&zp->z_lock); | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Grow the block size for a file. | |
1144 | * | |
1145 | * IN: zp - znode of file to free data in. | |
1146 | * size - requested block size | |
1147 | * tx - open transaction. | |
1148 | * | |
1149 | * NOTE: this function assumes that the znode is write locked. | |
1150 | */ | |
1151 | void | |
1152 | zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx) | |
1153 | { | |
1154 | int error; | |
1155 | u_longlong_t dummy; | |
1156 | ||
1157 | if (size <= zp->z_blksz) | |
1158 | return; | |
1159 | /* | |
1160 | * If the file size is already greater than the current blocksize, | |
1161 | * we will not grow. If there is more than one block in a file, | |
1162 | * the blocksize cannot change. | |
1163 | */ | |
1164 | if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz) | |
1165 | return; | |
1166 | ||
1167 | error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id, | |
1168 | size, 0, tx); | |
1169 | if (error == ENOTSUP) | |
1170 | return; | |
1171 | ASSERT3U(error, ==, 0); | |
1172 | ||
1173 | /* What blocksize did we actually get? */ | |
1174 | dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy); | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * This is a dummy interface used when pvn_vplist_dirty() should *not* | |
1179 | * be calling back into the fs for a putpage(). E.g.: when truncating | |
1180 | * a file, the pages being "thrown away* don't need to be written out. | |
1181 | */ | |
1182 | /* ARGSUSED */ | |
1183 | static int | |
1184 | zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp, | |
1185 | int flags, cred_t *cr) | |
1186 | { | |
1187 | ASSERT(0); | |
1188 | return (0); | |
1189 | } | |
1190 | ||
1191 | /* | |
b128c09f | 1192 | * Increase the file length |
34dc7c2f BB |
1193 | * |
1194 | * IN: zp - znode of file to free data in. | |
b128c09f | 1195 | * end - new end-of-file |
34dc7c2f BB |
1196 | * |
1197 | * RETURN: 0 if success | |
1198 | * error code if failure | |
1199 | */ | |
b128c09f BB |
1200 | static int |
1201 | zfs_extend(znode_t *zp, uint64_t end) | |
34dc7c2f | 1202 | { |
34dc7c2f | 1203 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
b128c09f | 1204 | dmu_tx_t *tx; |
34dc7c2f | 1205 | rl_t *rl; |
b128c09f | 1206 | uint64_t newblksz; |
34dc7c2f BB |
1207 | int error; |
1208 | ||
34dc7c2f | 1209 | /* |
b128c09f | 1210 | * We will change zp_size, lock the whole file. |
34dc7c2f | 1211 | */ |
b128c09f | 1212 | rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); |
34dc7c2f BB |
1213 | |
1214 | /* | |
1215 | * Nothing to do if file already at desired length. | |
1216 | */ | |
b128c09f | 1217 | if (end <= zp->z_phys->zp_size) { |
34dc7c2f BB |
1218 | zfs_range_unlock(rl); |
1219 | return (0); | |
1220 | } | |
b128c09f | 1221 | top: |
34dc7c2f BB |
1222 | tx = dmu_tx_create(zfsvfs->z_os); |
1223 | dmu_tx_hold_bonus(tx, zp->z_id); | |
b128c09f | 1224 | if (end > zp->z_blksz && |
34dc7c2f BB |
1225 | (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) { |
1226 | /* | |
1227 | * We are growing the file past the current block size. | |
1228 | */ | |
1229 | if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) { | |
1230 | ASSERT(!ISP2(zp->z_blksz)); | |
b128c09f | 1231 | newblksz = MIN(end, SPA_MAXBLOCKSIZE); |
34dc7c2f | 1232 | } else { |
b128c09f | 1233 | newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz); |
34dc7c2f | 1234 | } |
b128c09f BB |
1235 | dmu_tx_hold_write(tx, zp->z_id, 0, newblksz); |
1236 | } else { | |
1237 | newblksz = 0; | |
34dc7c2f BB |
1238 | } |
1239 | ||
fb5f0bc8 | 1240 | error = dmu_tx_assign(tx, TXG_NOWAIT); |
34dc7c2f | 1241 | if (error) { |
fb5f0bc8 | 1242 | if (error == ERESTART) { |
34dc7c2f | 1243 | dmu_tx_wait(tx); |
b128c09f BB |
1244 | dmu_tx_abort(tx); |
1245 | goto top; | |
1246 | } | |
34dc7c2f BB |
1247 | dmu_tx_abort(tx); |
1248 | zfs_range_unlock(rl); | |
1249 | return (error); | |
1250 | } | |
b128c09f | 1251 | dmu_buf_will_dirty(zp->z_dbuf, tx); |
34dc7c2f | 1252 | |
b128c09f BB |
1253 | if (newblksz) |
1254 | zfs_grow_blocksize(zp, newblksz, tx); | |
34dc7c2f | 1255 | |
b128c09f | 1256 | zp->z_phys->zp_size = end; |
34dc7c2f | 1257 | |
b128c09f | 1258 | zfs_range_unlock(rl); |
34dc7c2f | 1259 | |
b128c09f | 1260 | dmu_tx_commit(tx); |
34dc7c2f | 1261 | |
b128c09f BB |
1262 | return (0); |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Free space in a file. | |
1267 | * | |
1268 | * IN: zp - znode of file to free data in. | |
1269 | * off - start of section to free. | |
1270 | * len - length of section to free. | |
1271 | * | |
1272 | * RETURN: 0 if success | |
1273 | * error code if failure | |
1274 | */ | |
1275 | static int | |
1276 | zfs_free_range(znode_t *zp, uint64_t off, uint64_t len) | |
1277 | { | |
1278 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1279 | rl_t *rl; | |
1280 | int error; | |
1281 | ||
1282 | /* | |
1283 | * Lock the range being freed. | |
1284 | */ | |
1285 | rl = zfs_range_lock(zp, off, len, RL_WRITER); | |
1286 | ||
1287 | /* | |
1288 | * Nothing to do if file already at desired length. | |
1289 | */ | |
1290 | if (off >= zp->z_phys->zp_size) { | |
1291 | zfs_range_unlock(rl); | |
1292 | return (0); | |
34dc7c2f BB |
1293 | } |
1294 | ||
b128c09f BB |
1295 | if (off + len > zp->z_phys->zp_size) |
1296 | len = zp->z_phys->zp_size - off; | |
1297 | ||
1298 | error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len); | |
1299 | ||
34dc7c2f BB |
1300 | zfs_range_unlock(rl); |
1301 | ||
b128c09f BB |
1302 | return (error); |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * Truncate a file | |
1307 | * | |
1308 | * IN: zp - znode of file to free data in. | |
1309 | * end - new end-of-file. | |
1310 | * | |
1311 | * RETURN: 0 if success | |
1312 | * error code if failure | |
1313 | */ | |
1314 | static int | |
1315 | zfs_trunc(znode_t *zp, uint64_t end) | |
1316 | { | |
1317 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1318 | vnode_t *vp = ZTOV(zp); | |
1319 | dmu_tx_t *tx; | |
1320 | rl_t *rl; | |
1321 | int error; | |
1322 | ||
1323 | /* | |
1324 | * We will change zp_size, lock the whole file. | |
1325 | */ | |
1326 | rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); | |
1327 | ||
1328 | /* | |
1329 | * Nothing to do if file already at desired length. | |
1330 | */ | |
1331 | if (end >= zp->z_phys->zp_size) { | |
1332 | zfs_range_unlock(rl); | |
1333 | return (0); | |
1334 | } | |
1335 | ||
1336 | error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1); | |
1337 | if (error) { | |
1338 | zfs_range_unlock(rl); | |
1339 | return (error); | |
1340 | } | |
1341 | top: | |
1342 | tx = dmu_tx_create(zfsvfs->z_os); | |
1343 | dmu_tx_hold_bonus(tx, zp->z_id); | |
fb5f0bc8 | 1344 | error = dmu_tx_assign(tx, TXG_NOWAIT); |
b128c09f | 1345 | if (error) { |
fb5f0bc8 | 1346 | if (error == ERESTART) { |
b128c09f BB |
1347 | dmu_tx_wait(tx); |
1348 | dmu_tx_abort(tx); | |
1349 | goto top; | |
1350 | } | |
1351 | dmu_tx_abort(tx); | |
1352 | zfs_range_unlock(rl); | |
1353 | return (error); | |
1354 | } | |
1355 | dmu_buf_will_dirty(zp->z_dbuf, tx); | |
1356 | ||
1357 | zp->z_phys->zp_size = end; | |
1358 | ||
34dc7c2f BB |
1359 | dmu_tx_commit(tx); |
1360 | ||
1361 | /* | |
1362 | * Clear any mapped pages in the truncated region. This has to | |
1363 | * happen outside of the transaction to avoid the possibility of | |
1364 | * a deadlock with someone trying to push a page that we are | |
1365 | * about to invalidate. | |
1366 | */ | |
b128c09f | 1367 | if (vn_has_cached_data(vp)) { |
34dc7c2f | 1368 | page_t *pp; |
b128c09f BB |
1369 | uint64_t start = end & PAGEMASK; |
1370 | int poff = end & PAGEOFFSET; | |
34dc7c2f BB |
1371 | |
1372 | if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) { | |
1373 | /* | |
1374 | * We need to zero a partial page. | |
1375 | */ | |
1376 | pagezero(pp, poff, PAGESIZE - poff); | |
1377 | start += PAGESIZE; | |
1378 | page_unlock(pp); | |
1379 | } | |
1380 | error = pvn_vplist_dirty(vp, start, zfs_no_putpage, | |
1381 | B_INVAL | B_TRUNC, NULL); | |
1382 | ASSERT(error == 0); | |
1383 | } | |
d164b209 BB |
1384 | |
1385 | zfs_range_unlock(rl); | |
34dc7c2f BB |
1386 | |
1387 | return (0); | |
1388 | } | |
1389 | ||
b128c09f BB |
1390 | /* |
1391 | * Free space in a file | |
1392 | * | |
1393 | * IN: zp - znode of file to free data in. | |
1394 | * off - start of range | |
1395 | * len - end of range (0 => EOF) | |
1396 | * flag - current file open mode flags. | |
1397 | * log - TRUE if this action should be logged | |
1398 | * | |
1399 | * RETURN: 0 if success | |
1400 | * error code if failure | |
1401 | */ | |
1402 | int | |
1403 | zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log) | |
1404 | { | |
1405 | vnode_t *vp = ZTOV(zp); | |
1406 | dmu_tx_t *tx; | |
1407 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1408 | zilog_t *zilog = zfsvfs->z_log; | |
1409 | int error; | |
1410 | ||
1411 | if (off > zp->z_phys->zp_size) { | |
1412 | error = zfs_extend(zp, off+len); | |
1413 | if (error == 0 && log) | |
1414 | goto log; | |
1415 | else | |
1416 | return (error); | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * Check for any locks in the region to be freed. | |
1421 | */ | |
1422 | if (MANDLOCK(vp, (mode_t)zp->z_phys->zp_mode)) { | |
1423 | uint64_t length = (len ? len : zp->z_phys->zp_size - off); | |
1424 | if (error = chklock(vp, FWRITE, off, length, flag, NULL)) | |
1425 | return (error); | |
1426 | } | |
1427 | ||
1428 | if (len == 0) { | |
1429 | error = zfs_trunc(zp, off); | |
1430 | } else { | |
1431 | if ((error = zfs_free_range(zp, off, len)) == 0 && | |
1432 | off + len > zp->z_phys->zp_size) | |
1433 | error = zfs_extend(zp, off+len); | |
1434 | } | |
1435 | if (error || !log) | |
1436 | return (error); | |
1437 | log: | |
1438 | tx = dmu_tx_create(zfsvfs->z_os); | |
1439 | dmu_tx_hold_bonus(tx, zp->z_id); | |
fb5f0bc8 | 1440 | error = dmu_tx_assign(tx, TXG_NOWAIT); |
b128c09f | 1441 | if (error) { |
fb5f0bc8 | 1442 | if (error == ERESTART) { |
b128c09f BB |
1443 | dmu_tx_wait(tx); |
1444 | dmu_tx_abort(tx); | |
1445 | goto log; | |
1446 | } | |
1447 | dmu_tx_abort(tx); | |
1448 | return (error); | |
1449 | } | |
1450 | ||
1451 | zfs_time_stamper(zp, CONTENT_MODIFIED, tx); | |
1452 | zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len); | |
1453 | ||
1454 | dmu_tx_commit(tx); | |
1455 | return (0); | |
1456 | } | |
1457 | ||
34dc7c2f BB |
1458 | void |
1459 | zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx) | |
1460 | { | |
1461 | zfsvfs_t zfsvfs; | |
9babb374 | 1462 | uint64_t moid, obj, version; |
34dc7c2f BB |
1463 | uint64_t sense = ZFS_CASE_SENSITIVE; |
1464 | uint64_t norm = 0; | |
1465 | nvpair_t *elem; | |
1466 | int error; | |
1467 | znode_t *rootzp = NULL; | |
1468 | vnode_t *vp; | |
1469 | vattr_t vattr; | |
1470 | znode_t *zp; | |
9babb374 | 1471 | zfs_acl_ids_t acl_ids; |
34dc7c2f BB |
1472 | |
1473 | /* | |
1474 | * First attempt to create master node. | |
1475 | */ | |
1476 | /* | |
1477 | * In an empty objset, there are no blocks to read and thus | |
1478 | * there can be no i/o errors (which we assert below). | |
1479 | */ | |
1480 | moid = MASTER_NODE_OBJ; | |
1481 | error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE, | |
1482 | DMU_OT_NONE, 0, tx); | |
1483 | ASSERT(error == 0); | |
1484 | ||
1485 | /* | |
1486 | * Set starting attributes. | |
1487 | */ | |
9babb374 | 1488 | if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_USERSPACE) |
b128c09f | 1489 | version = ZPL_VERSION; |
9babb374 BB |
1490 | else if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID) |
1491 | version = ZPL_VERSION_USERSPACE - 1; | |
b128c09f BB |
1492 | else |
1493 | version = ZPL_VERSION_FUID - 1; | |
34dc7c2f BB |
1494 | elem = NULL; |
1495 | while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) { | |
1496 | /* For the moment we expect all zpl props to be uint64_ts */ | |
1497 | uint64_t val; | |
1498 | char *name; | |
1499 | ||
1500 | ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64); | |
1501 | VERIFY(nvpair_value_uint64(elem, &val) == 0); | |
1502 | name = nvpair_name(elem); | |
1503 | if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) { | |
9babb374 BB |
1504 | if (val < version) |
1505 | version = val; | |
34dc7c2f BB |
1506 | } else { |
1507 | error = zap_update(os, moid, name, 8, 1, &val, tx); | |
1508 | } | |
1509 | ASSERT(error == 0); | |
1510 | if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0) | |
1511 | norm = val; | |
1512 | else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0) | |
1513 | sense = val; | |
1514 | } | |
1515 | ASSERT(version != 0); | |
9babb374 | 1516 | error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx); |
34dc7c2f BB |
1517 | |
1518 | /* | |
1519 | * Create a delete queue. | |
1520 | */ | |
9babb374 | 1521 | obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx); |
34dc7c2f | 1522 | |
9babb374 | 1523 | error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx); |
34dc7c2f BB |
1524 | ASSERT(error == 0); |
1525 | ||
1526 | /* | |
1527 | * Create root znode. Create minimal znode/vnode/zfsvfs | |
1528 | * to allow zfs_mknode to work. | |
1529 | */ | |
1530 | vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; | |
1531 | vattr.va_type = VDIR; | |
1532 | vattr.va_mode = S_IFDIR|0755; | |
1533 | vattr.va_uid = crgetuid(cr); | |
1534 | vattr.va_gid = crgetgid(cr); | |
1535 | ||
1536 | rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP); | |
34dc7c2f BB |
1537 | rootzp->z_unlinked = 0; |
1538 | rootzp->z_atime_dirty = 0; | |
1539 | ||
1540 | vp = ZTOV(rootzp); | |
1541 | vn_reinit(vp); | |
1542 | vp->v_type = VDIR; | |
1543 | ||
1544 | bzero(&zfsvfs, sizeof (zfsvfs_t)); | |
1545 | ||
1546 | zfsvfs.z_os = os; | |
34dc7c2f BB |
1547 | zfsvfs.z_parent = &zfsvfs; |
1548 | zfsvfs.z_version = version; | |
1549 | zfsvfs.z_use_fuids = USE_FUIDS(version, os); | |
1550 | zfsvfs.z_norm = norm; | |
1551 | /* | |
1552 | * Fold case on file systems that are always or sometimes case | |
1553 | * insensitive. | |
1554 | */ | |
1555 | if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED) | |
1556 | zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER; | |
1557 | ||
1558 | mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); | |
1559 | list_create(&zfsvfs.z_all_znodes, sizeof (znode_t), | |
1560 | offsetof(znode_t, z_link_node)); | |
1561 | ||
b128c09f BB |
1562 | ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs)); |
1563 | rootzp->z_zfsvfs = &zfsvfs; | |
9babb374 BB |
1564 | VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr, |
1565 | cr, NULL, &acl_ids)); | |
1566 | zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, 0, &acl_ids); | |
34dc7c2f | 1567 | ASSERT3P(zp, ==, rootzp); |
b128c09f | 1568 | ASSERT(!vn_in_dnlc(ZTOV(rootzp))); /* not valid to move */ |
34dc7c2f BB |
1569 | error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx); |
1570 | ASSERT(error == 0); | |
9babb374 | 1571 | zfs_acl_ids_free(&acl_ids); |
b128c09f | 1572 | POINTER_INVALIDATE(&rootzp->z_zfsvfs); |
34dc7c2f BB |
1573 | |
1574 | ZTOV(rootzp)->v_count = 0; | |
1575 | dmu_buf_rele(rootzp->z_dbuf, NULL); | |
1576 | rootzp->z_dbuf = NULL; | |
1577 | kmem_cache_free(znode_cache, rootzp); | |
9babb374 BB |
1578 | |
1579 | /* | |
1580 | * Create shares directory | |
1581 | */ | |
1582 | ||
1583 | error = zfs_create_share_dir(&zfsvfs, tx); | |
1584 | ||
1585 | ASSERT(error == 0); | |
34dc7c2f BB |
1586 | } |
1587 | ||
1588 | #endif /* _KERNEL */ | |
1589 | /* | |
1590 | * Given an object number, return its parent object number and whether | |
1591 | * or not the object is an extended attribute directory. | |
1592 | */ | |
1593 | static int | |
1594 | zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir) | |
1595 | { | |
1596 | dmu_buf_t *db; | |
1597 | dmu_object_info_t doi; | |
1598 | znode_phys_t *zp; | |
1599 | int error; | |
1600 | ||
1601 | if ((error = dmu_bonus_hold(osp, obj, FTAG, &db)) != 0) | |
1602 | return (error); | |
1603 | ||
1604 | dmu_object_info_from_db(db, &doi); | |
1605 | if (doi.doi_bonus_type != DMU_OT_ZNODE || | |
1606 | doi.doi_bonus_size < sizeof (znode_phys_t)) { | |
1607 | dmu_buf_rele(db, FTAG); | |
1608 | return (EINVAL); | |
1609 | } | |
1610 | ||
1611 | zp = db->db_data; | |
1612 | *pobjp = zp->zp_parent; | |
1613 | *is_xattrdir = ((zp->zp_flags & ZFS_XATTR) != 0) && | |
1614 | S_ISDIR(zp->zp_mode); | |
1615 | dmu_buf_rele(db, FTAG); | |
1616 | ||
1617 | return (0); | |
1618 | } | |
1619 | ||
1620 | int | |
1621 | zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len) | |
1622 | { | |
1623 | char *path = buf + len - 1; | |
1624 | int error; | |
1625 | ||
1626 | *path = '\0'; | |
1627 | ||
1628 | for (;;) { | |
1629 | uint64_t pobj; | |
1630 | char component[MAXNAMELEN + 2]; | |
1631 | size_t complen; | |
1632 | int is_xattrdir; | |
1633 | ||
1634 | if ((error = zfs_obj_to_pobj(osp, obj, &pobj, | |
1635 | &is_xattrdir)) != 0) | |
1636 | break; | |
1637 | ||
1638 | if (pobj == obj) { | |
1639 | if (path[0] != '/') | |
1640 | *--path = '/'; | |
1641 | break; | |
1642 | } | |
1643 | ||
1644 | component[0] = '/'; | |
1645 | if (is_xattrdir) { | |
1646 | (void) sprintf(component + 1, "<xattrdir>"); | |
1647 | } else { | |
1648 | error = zap_value_search(osp, pobj, obj, | |
1649 | ZFS_DIRENT_OBJ(-1ULL), component + 1); | |
1650 | if (error != 0) | |
1651 | break; | |
1652 | } | |
1653 | ||
1654 | complen = strlen(component); | |
1655 | path -= complen; | |
1656 | ASSERT(path >= buf); | |
1657 | bcopy(component, path, complen); | |
1658 | obj = pobj; | |
1659 | } | |
1660 | ||
1661 | if (error == 0) | |
1662 | (void) memmove(buf, path, buf + len - path); | |
1663 | return (error); | |
1664 | } |