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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 /* Portions Copyright 2007 Jeremy Teo */
26
27 #ifdef _KERNEL
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/time.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
33 #include <sys/resource.h>
34 #include <sys/mntent.h>
35 #include <sys/mkdev.h>
36 #include <sys/u8_textprep.h>
37 #include <sys/dsl_dataset.h>
38 #include <sys/vfs.h>
39 #include <sys/vfs_opreg.h>
40 #include <sys/vnode.h>
41 #include <sys/file.h>
42 #include <sys/kmem.h>
43 #include <sys/errno.h>
44 #include <sys/unistd.h>
45 #include <sys/mode.h>
46 #include <sys/atomic.h>
47 #include <vm/pvn.h>
48 #include "fs/fs_subr.h"
49 #include <sys/zfs_dir.h>
50 #include <sys/zfs_acl.h>
51 #include <sys/zfs_ioctl.h>
52 #include <sys/zfs_rlock.h>
53 #include <sys/zfs_fuid.h>
54 #include <sys/zfs_vnops.h>
55 #include <sys/dnode.h>
56 #include <sys/fs/zfs.h>
57 #include <sys/kidmap.h>
58 #include <sys/zpl.h>
59 #endif /* _KERNEL */
60
61 #include <sys/dmu.h>
62 #include <sys/refcount.h>
63 #include <sys/stat.h>
64 #include <sys/zap.h>
65 #include <sys/zfs_znode.h>
66 #include <sys/sa.h>
67 #include <sys/zfs_sa.h>
68 #include <sys/zfs_stat.h>
69
70 #include "zfs_prop.h"
71 #include "zfs_comutil.h"
72
73 /*
74 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
75 * turned on when DEBUG is also defined.
76 */
77 #ifdef DEBUG
78 #define ZNODE_STATS
79 #endif /* DEBUG */
80
81 #ifdef ZNODE_STATS
82 #define ZNODE_STAT_ADD(stat) ((stat)++)
83 #else
84 #define ZNODE_STAT_ADD(stat) /* nothing */
85 #endif /* ZNODE_STATS */
86
87 /*
88 * Functions needed for userland (ie: libzpool) are not put under
89 * #ifdef_KERNEL; the rest of the functions have dependencies
90 * (such as VFS logic) that will not compile easily in userland.
91 */
92 #ifdef _KERNEL
93
94 static kmem_cache_t *znode_cache = NULL;
95
96 /*ARGSUSED*/
97 static int
98 zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
99 {
100 znode_t *zp = buf;
101
102 inode_init_once(ZTOI(zp));
103 list_link_init(&zp->z_link_node);
104
105 mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
106 rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
107 rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
108 mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
109
110 mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
111 avl_create(&zp->z_range_avl, zfs_range_compare,
112 sizeof (rl_t), offsetof(rl_t, r_node));
113
114 zp->z_dirlocks = NULL;
115 zp->z_acl_cached = NULL;
116 zp->z_moved = 0;
117 return (0);
118 }
119
120 /*ARGSUSED*/
121 static void
122 zfs_znode_cache_destructor(void *buf, void *arg)
123 {
124 znode_t *zp = buf;
125
126 ASSERT(!list_link_active(&zp->z_link_node));
127 mutex_destroy(&zp->z_lock);
128 rw_destroy(&zp->z_parent_lock);
129 rw_destroy(&zp->z_name_lock);
130 mutex_destroy(&zp->z_acl_lock);
131 avl_destroy(&zp->z_range_avl);
132 mutex_destroy(&zp->z_range_lock);
133
134 ASSERT(zp->z_dirlocks == NULL);
135 ASSERT(zp->z_acl_cached == NULL);
136 }
137
138 void
139 zfs_znode_init(void)
140 {
141 /*
142 * Initialize zcache
143 */
144 ASSERT(znode_cache == NULL);
145 znode_cache = kmem_cache_create("zfs_znode_cache",
146 sizeof (znode_t), 0, zfs_znode_cache_constructor,
147 zfs_znode_cache_destructor, NULL, NULL, NULL, KMC_KMEM);
148 }
149
150 void
151 zfs_znode_fini(void)
152 {
153 /*
154 * Cleanup zcache
155 */
156 if (znode_cache)
157 kmem_cache_destroy(znode_cache);
158 znode_cache = NULL;
159 }
160
161 int
162 zfs_create_share_dir(zfs_sb_t *zsb, dmu_tx_t *tx)
163 {
164 #ifdef HAVE_SHARE
165 zfs_acl_ids_t acl_ids;
166 vattr_t vattr;
167 znode_t *sharezp;
168 vnode_t *vp;
169 znode_t *zp;
170 int error;
171
172 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
173 vattr.va_mode = S_IFDIR | 0555;
174 vattr.va_uid = crgetuid(kcred);
175 vattr.va_gid = crgetgid(kcred);
176
177 sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
178 sharezp->z_moved = 0;
179 sharezp->z_unlinked = 0;
180 sharezp->z_atime_dirty = 0;
181 sharezp->z_zfsvfs = zfsvfs;
182 sharezp->z_is_sa = zfsvfs->z_use_sa;
183
184 vp = ZTOV(sharezp);
185 vn_reinit(vp);
186 vp->v_type = VDIR;
187
188 VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
189 kcred, NULL, &acl_ids));
190 zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
191 ASSERT3P(zp, ==, sharezp);
192 ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
193 POINTER_INVALIDATE(&sharezp->z_zfsvfs);
194 error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
195 ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
196 zfsvfs->z_shares_dir = sharezp->z_id;
197
198 zfs_acl_ids_free(&acl_ids);
199 // ZTOV(sharezp)->v_count = 0;
200 sa_handle_destroy(sharezp->z_sa_hdl);
201 kmem_cache_free(znode_cache, sharezp);
202
203 return (error);
204 #else
205 return (0);
206 #endif /* HAVE_SHARE */
207 }
208
209 static void
210 zfs_znode_sa_init(zfs_sb_t *zsb, znode_t *zp,
211 dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
212 {
213 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zsb, zp->z_id)));
214
215 mutex_enter(&zp->z_lock);
216
217 ASSERT(zp->z_sa_hdl == NULL);
218 ASSERT(zp->z_acl_cached == NULL);
219 if (sa_hdl == NULL) {
220 VERIFY(0 == sa_handle_get_from_db(zsb->z_os, db, zp,
221 SA_HDL_SHARED, &zp->z_sa_hdl));
222 } else {
223 zp->z_sa_hdl = sa_hdl;
224 sa_set_userp(sa_hdl, zp);
225 }
226
227 zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
228
229 mutex_exit(&zp->z_lock);
230 }
231
232 void
233 zfs_znode_dmu_fini(znode_t *zp)
234 {
235 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(ZTOZSB(zp), zp->z_id)) ||
236 zp->z_unlinked ||
237 RW_WRITE_HELD(&ZTOZSB(zp)->z_teardown_inactive_lock));
238
239 sa_handle_destroy(zp->z_sa_hdl);
240 zp->z_sa_hdl = NULL;
241 }
242
243 /*
244 * Called by new_inode() to allocate a new inode.
245 */
246 int
247 zfs_inode_alloc(struct super_block *sb, struct inode **ip)
248 {
249 znode_t *zp;
250
251 zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
252 *ip = ZTOI(zp);
253
254 return (0);
255 }
256
257 /*
258 * Called in multiple places when an inode should be destroyed.
259 */
260 void
261 zfs_inode_destroy(struct inode *ip)
262 {
263 znode_t *zp = ITOZ(ip);
264 zfs_sb_t *zsb = ZTOZSB(zp);
265
266 mutex_enter(&zsb->z_znodes_lock);
267 list_remove(&zsb->z_all_znodes, zp);
268 mutex_exit(&zsb->z_znodes_lock);
269
270 if (zp->z_acl_cached) {
271 zfs_acl_free(zp->z_acl_cached);
272 zp->z_acl_cached = NULL;
273 }
274
275 kmem_cache_free(znode_cache, zp);
276 }
277
278 static void
279 zfs_inode_set_ops(zfs_sb_t *zsb, struct inode *ip)
280 {
281 uint64_t rdev;
282
283 switch (ip->i_mode & S_IFMT) {
284 case S_IFREG:
285 ip->i_op = &zpl_inode_operations;
286 ip->i_fop = &zpl_file_operations;
287 ip->i_mapping->a_ops = &zpl_address_space_operations;
288 break;
289
290 case S_IFDIR:
291 ip->i_op = &zpl_dir_inode_operations;
292 ip->i_fop = &zpl_dir_file_operations;
293 ITOZ(ip)->z_zn_prefetch = B_TRUE;
294 break;
295
296 case S_IFLNK:
297 ip->i_op = &zpl_symlink_inode_operations;
298 break;
299
300 case S_IFCHR:
301 case S_IFBLK:
302 case S_IFIFO:
303 case S_IFSOCK:
304 VERIFY(sa_lookup(ITOZ(ip)->z_sa_hdl, SA_ZPL_RDEV(zsb),
305 &rdev, sizeof (rdev)) == 0);
306 init_special_inode(ip, ip->i_mode, rdev);
307 ip->i_op = &zpl_special_inode_operations;
308 break;
309
310 default:
311 printk("ZFS: Invalid mode: 0x%x\n", ip->i_mode);
312 VERIFY(0);
313 }
314 }
315
316 /*
317 * Construct a znode+inode and initialize.
318 *
319 * This does not do a call to dmu_set_user() that is
320 * up to the caller to do, in case you don't want to
321 * return the znode
322 */
323 static znode_t *
324 zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
325 dmu_object_type_t obj_type, uint64_t obj, sa_handle_t *hdl)
326 {
327 znode_t *zp;
328 struct inode *ip;
329 uint64_t parent;
330 sa_bulk_attr_t bulk[9];
331 int count = 0;
332
333 ASSERT(zsb != NULL);
334
335 ip = new_inode(zsb->z_sb);
336 if (ip == NULL)
337 return (NULL);
338
339 zp = ITOZ(ip);
340 ASSERT(zp->z_dirlocks == NULL);
341 zp->z_moved = 0;
342 zp->z_sa_hdl = NULL;
343 zp->z_unlinked = 0;
344 zp->z_atime_dirty = 0;
345 zp->z_mapcnt = 0;
346 zp->z_id = db->db_object;
347 zp->z_blksz = blksz;
348 zp->z_seq = 0x7A4653;
349 zp->z_sync_cnt = 0;
350
351 zfs_znode_sa_init(zsb, zp, db, obj_type, hdl);
352
353 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL, &zp->z_mode, 8);
354 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zsb), NULL, &zp->z_gen, 8);
355 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zsb), NULL, &zp->z_size, 8);
356 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zsb), NULL, &zp->z_links, 8);
357 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
358 &zp->z_pflags, 8);
359 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zsb), NULL,
360 &parent, 8);
361 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zsb), NULL,
362 &zp->z_atime, 16);
363 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL, &zp->z_uid, 8);
364 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL, &zp->z_gid, 8);
365
366 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) {
367 if (hdl == NULL)
368 sa_handle_destroy(zp->z_sa_hdl);
369
370 goto error;
371 }
372
373 ip->i_ino = obj;
374 ip->i_mode = zp->z_mode;
375 ip->i_mtime = ip->i_atime = ip->i_ctime = CURRENT_TIME_SEC;
376 zfs_inode_set_ops(zsb, ip);
377
378 if (insert_inode_locked(ip))
379 goto error;
380
381 mutex_enter(&zsb->z_znodes_lock);
382 list_insert_tail(&zsb->z_all_znodes, zp);
383 membar_producer();
384 mutex_exit(&zsb->z_znodes_lock);
385
386 unlock_new_inode(ip);
387 return (zp);
388
389 error:
390 unlock_new_inode(ip);
391 iput(ip);
392 return NULL;
393 }
394
395 /*
396 * Update the embedded inode given the znode. We should work toward
397 * eliminating this function as soon as possible by removing values
398 * which are duplicated between the znode and inode. If the generic
399 * inode has the correct field it should be used, and the ZFS code
400 * updated to access the inode. This can be done incrementally.
401 */
402 void
403 zfs_inode_update(znode_t *zp)
404 {
405 zfs_sb_t *zsb;
406 struct inode *ip;
407 uint32_t blksize;
408 uint64_t atime[2], mtime[2], ctime[2];
409
410 ASSERT(zp != NULL);
411 zsb = ZTOZSB(zp);
412 ip = ZTOI(zp);
413
414 sa_lookup(zp->z_sa_hdl, SA_ZPL_ATIME(zsb), &atime, 16);
415 sa_lookup(zp->z_sa_hdl, SA_ZPL_MTIME(zsb), &mtime, 16);
416 sa_lookup(zp->z_sa_hdl, SA_ZPL_CTIME(zsb), &ctime, 16);
417
418 spin_lock(&ip->i_lock);
419 ip->i_generation = zp->z_gen;
420 ip->i_uid = zp->z_uid;
421 ip->i_gid = zp->z_gid;
422 ip->i_nlink = zp->z_links;
423 ip->i_mode = zp->z_mode;
424 ip->i_blkbits = SPA_MINBLOCKSHIFT;
425 dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &blksize,
426 (u_longlong_t *)&ip->i_blocks);
427
428 ZFS_TIME_DECODE(&ip->i_atime, atime);
429 ZFS_TIME_DECODE(&ip->i_mtime, mtime);
430 ZFS_TIME_DECODE(&ip->i_ctime, ctime);
431
432 i_size_write(ip, zp->z_size);
433 spin_unlock(&ip->i_lock);
434 }
435
436 static uint64_t empty_xattr;
437 static uint64_t pad[4];
438 static zfs_acl_phys_t acl_phys;
439 /*
440 * Create a new DMU object to hold a zfs znode.
441 *
442 * IN: dzp - parent directory for new znode
443 * vap - file attributes for new znode
444 * tx - dmu transaction id for zap operations
445 * cr - credentials of caller
446 * flag - flags:
447 * IS_ROOT_NODE - new object will be root
448 * IS_XATTR - new object is an attribute
449 * bonuslen - length of bonus buffer
450 * setaclp - File/Dir initial ACL
451 * fuidp - Tracks fuid allocation.
452 *
453 * OUT: zpp - allocated znode
454 *
455 */
456 void
457 zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
458 uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
459 {
460 uint64_t crtime[2], atime[2], mtime[2], ctime[2];
461 uint64_t mode, size, links, parent, pflags;
462 uint64_t dzp_pflags = 0;
463 uint64_t rdev = 0;
464 zfs_sb_t *zsb = ZTOZSB(dzp);
465 dmu_buf_t *db;
466 timestruc_t now;
467 uint64_t gen, obj;
468 int err;
469 int bonuslen;
470 sa_handle_t *sa_hdl;
471 dmu_object_type_t obj_type;
472 sa_bulk_attr_t *sa_attrs;
473 int cnt = 0;
474 zfs_acl_locator_cb_t locate = { 0 };
475
476 if (zsb->z_replay) {
477 obj = vap->va_nodeid;
478 now = vap->va_ctime; /* see zfs_replay_create() */
479 gen = vap->va_nblocks; /* ditto */
480 } else {
481 obj = 0;
482 gethrestime(&now);
483 gen = dmu_tx_get_txg(tx);
484 }
485
486 obj_type = zsb->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
487 bonuslen = (obj_type == DMU_OT_SA) ?
488 DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;
489
490 /*
491 * Create a new DMU object.
492 */
493 /*
494 * There's currently no mechanism for pre-reading the blocks that will
495 * be needed to allocate a new object, so we accept the small chance
496 * that there will be an i/o error and we will fail one of the
497 * assertions below.
498 */
499 if (S_ISDIR(vap->va_mode)) {
500 if (zsb->z_replay) {
501 err = zap_create_claim_norm(zsb->z_os, obj,
502 zsb->z_norm, DMU_OT_DIRECTORY_CONTENTS,
503 obj_type, bonuslen, tx);
504 ASSERT3U(err, ==, 0);
505 } else {
506 obj = zap_create_norm(zsb->z_os,
507 zsb->z_norm, DMU_OT_DIRECTORY_CONTENTS,
508 obj_type, bonuslen, tx);
509 }
510 } else {
511 if (zsb->z_replay) {
512 err = dmu_object_claim(zsb->z_os, obj,
513 DMU_OT_PLAIN_FILE_CONTENTS, 0,
514 obj_type, bonuslen, tx);
515 ASSERT3U(err, ==, 0);
516 } else {
517 obj = dmu_object_alloc(zsb->z_os,
518 DMU_OT_PLAIN_FILE_CONTENTS, 0,
519 obj_type, bonuslen, tx);
520 }
521 }
522
523 ZFS_OBJ_HOLD_ENTER(zsb, obj);
524 VERIFY(0 == sa_buf_hold(zsb->z_os, obj, NULL, &db));
525
526 /*
527 * If this is the root, fix up the half-initialized parent pointer
528 * to reference the just-allocated physical data area.
529 */
530 if (flag & IS_ROOT_NODE) {
531 dzp->z_id = obj;
532 } else {
533 dzp_pflags = dzp->z_pflags;
534 }
535
536 /*
537 * If parent is an xattr, so am I.
538 */
539 if (dzp_pflags & ZFS_XATTR) {
540 flag |= IS_XATTR;
541 }
542
543 if (zsb->z_use_fuids)
544 pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
545 else
546 pflags = 0;
547
548 if (S_ISDIR(vap->va_mode)) {
549 size = 2; /* contents ("." and "..") */
550 links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
551 } else {
552 size = links = 0;
553 }
554
555 if (S_ISBLK(vap->va_mode) || S_ISCHR(vap->va_mode) ||
556 S_ISFIFO(vap->va_mode) || S_ISSOCK(vap->va_mode))
557 rdev = vap->va_rdev;
558
559 parent = dzp->z_id;
560 mode = acl_ids->z_mode;
561 if (flag & IS_XATTR)
562 pflags |= ZFS_XATTR;
563
564 /*
565 * No execs denied will be deterimed when zfs_mode_compute() is called.
566 */
567 pflags |= acl_ids->z_aclp->z_hints &
568 (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
569 ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);
570
571 ZFS_TIME_ENCODE(&now, crtime);
572 ZFS_TIME_ENCODE(&now, ctime);
573
574 if (vap->va_mask & ATTR_ATIME) {
575 ZFS_TIME_ENCODE(&vap->va_atime, atime);
576 } else {
577 ZFS_TIME_ENCODE(&now, atime);
578 }
579
580 if (vap->va_mask & ATTR_MTIME) {
581 ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
582 } else {
583 ZFS_TIME_ENCODE(&now, mtime);
584 }
585
586 /* Now add in all of the "SA" attributes */
587 VERIFY(0 == sa_handle_get_from_db(zsb->z_os, db, NULL, SA_HDL_SHARED,
588 &sa_hdl));
589
590 /*
591 * Setup the array of attributes to be replaced/set on the new file
592 *
593 * order for DMU_OT_ZNODE is critical since it needs to be constructed
594 * in the old znode_phys_t format. Don't change this ordering
595 */
596 sa_attrs = kmem_alloc(sizeof(sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
597
598 if (obj_type == DMU_OT_ZNODE) {
599 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zsb),
600 NULL, &atime, 16);
601 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zsb),
602 NULL, &mtime, 16);
603 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zsb),
604 NULL, &ctime, 16);
605 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zsb),
606 NULL, &crtime, 16);
607 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zsb),
608 NULL, &gen, 8);
609 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zsb),
610 NULL, &mode, 8);
611 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zsb),
612 NULL, &size, 8);
613 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zsb),
614 NULL, &parent, 8);
615 } else {
616 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zsb),
617 NULL, &mode, 8);
618 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zsb),
619 NULL, &size, 8);
620 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zsb),
621 NULL, &gen, 8);
622 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zsb),
623 NULL, &acl_ids->z_fuid, 8);
624 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zsb),
625 NULL, &acl_ids->z_fgid, 8);
626 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zsb),
627 NULL, &parent, 8);
628 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zsb),
629 NULL, &pflags, 8);
630 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zsb),
631 NULL, &atime, 16);
632 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zsb),
633 NULL, &mtime, 16);
634 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zsb),
635 NULL, &ctime, 16);
636 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zsb),
637 NULL, &crtime, 16);
638 }
639
640 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zsb), NULL, &links, 8);
641
642 if (obj_type == DMU_OT_ZNODE) {
643 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zsb), NULL,
644 &empty_xattr, 8);
645 }
646 if (obj_type == DMU_OT_ZNODE ||
647 (S_ISBLK(vap->va_mode) || S_ISCHR(vap->va_mode) ||
648 S_ISFIFO(vap->va_mode) || S_ISSOCK(vap->va_mode))) {
649 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zsb),
650 NULL, &rdev, 8);
651 }
652 if (obj_type == DMU_OT_ZNODE) {
653 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zsb),
654 NULL, &pflags, 8);
655 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zsb), NULL,
656 &acl_ids->z_fuid, 8);
657 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zsb), NULL,
658 &acl_ids->z_fgid, 8);
659 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zsb), NULL, pad,
660 sizeof (uint64_t) * 4);
661 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zsb), NULL,
662 &acl_phys, sizeof (zfs_acl_phys_t));
663 } else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
664 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zsb), NULL,
665 &acl_ids->z_aclp->z_acl_count, 8);
666 locate.cb_aclp = acl_ids->z_aclp;
667 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zsb),
668 zfs_acl_data_locator, &locate,
669 acl_ids->z_aclp->z_acl_bytes);
670 mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
671 acl_ids->z_fuid, acl_ids->z_fgid);
672 }
673
674 VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);
675
676 if (!(flag & IS_ROOT_NODE)) {
677 *zpp = zfs_znode_alloc(zsb, db, 0, obj_type, obj, sa_hdl);
678 ASSERT(*zpp != NULL);
679 ASSERT(dzp != NULL);
680 err = zpl_xattr_security_init(ZTOI(*zpp), ZTOI(dzp));
681 ASSERT3S(err, ==, 0);
682 } else {
683 /*
684 * If we are creating the root node, the "parent" we
685 * passed in is the znode for the root.
686 */
687 *zpp = dzp;
688
689 (*zpp)->z_sa_hdl = sa_hdl;
690 }
691
692 (*zpp)->z_pflags = pflags;
693 (*zpp)->z_mode = mode;
694
695 if (obj_type == DMU_OT_ZNODE ||
696 acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
697 err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
698 ASSERT3S(err, ==, 0);
699 }
700 kmem_free(sa_attrs, sizeof(sa_bulk_attr_t) * ZPL_END);
701 ZFS_OBJ_HOLD_EXIT(zsb, obj);
702 }
703
704 int
705 zfs_zget(zfs_sb_t *zsb, uint64_t obj_num, znode_t **zpp)
706 {
707 dmu_object_info_t doi;
708 dmu_buf_t *db;
709 znode_t *zp;
710 int err;
711 sa_handle_t *hdl;
712
713 *zpp = NULL;
714
715 ZFS_OBJ_HOLD_ENTER(zsb, obj_num);
716
717 err = sa_buf_hold(zsb->z_os, obj_num, NULL, &db);
718 if (err) {
719 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
720 return (err);
721 }
722
723 dmu_object_info_from_db(db, &doi);
724 if (doi.doi_bonus_type != DMU_OT_SA &&
725 (doi.doi_bonus_type != DMU_OT_ZNODE ||
726 (doi.doi_bonus_type == DMU_OT_ZNODE &&
727 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
728 sa_buf_rele(db, NULL);
729 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
730 return (EINVAL);
731 }
732
733 hdl = dmu_buf_get_user(db);
734 if (hdl != NULL) {
735 zp = sa_get_userdata(hdl);
736
737
738 /*
739 * Since "SA" does immediate eviction we
740 * should never find a sa handle that doesn't
741 * know about the znode.
742 */
743
744 ASSERT3P(zp, !=, NULL);
745
746 mutex_enter(&zp->z_lock);
747 ASSERT3U(zp->z_id, ==, obj_num);
748 if (zp->z_unlinked) {
749 err = ENOENT;
750 } else {
751 igrab(ZTOI(zp));
752 *zpp = zp;
753 err = 0;
754 }
755 sa_buf_rele(db, NULL);
756 mutex_exit(&zp->z_lock);
757 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
758 return (err);
759 }
760
761 /*
762 * Not found create new znode/vnode but only if file exists.
763 *
764 * There is a small window where zfs_vget() could
765 * find this object while a file create is still in
766 * progress. This is checked for in zfs_znode_alloc()
767 *
768 * if zfs_znode_alloc() fails it will drop the hold on the
769 * bonus buffer.
770 */
771 zp = zfs_znode_alloc(zsb, db, doi.doi_data_block_size,
772 doi.doi_bonus_type, obj_num, NULL);
773 if (zp == NULL) {
774 err = ENOENT;
775 } else {
776 *zpp = zp;
777 }
778 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
779 return (err);
780 }
781
782 int
783 zfs_rezget(znode_t *zp)
784 {
785 zfs_sb_t *zsb = ZTOZSB(zp);
786 dmu_object_info_t doi;
787 dmu_buf_t *db;
788 uint64_t obj_num = zp->z_id;
789 uint64_t mode;
790 sa_bulk_attr_t bulk[8];
791 int err;
792 int count = 0;
793 uint64_t gen;
794
795 ZFS_OBJ_HOLD_ENTER(zsb, obj_num);
796
797 mutex_enter(&zp->z_acl_lock);
798 if (zp->z_acl_cached) {
799 zfs_acl_free(zp->z_acl_cached);
800 zp->z_acl_cached = NULL;
801 }
802
803 mutex_exit(&zp->z_acl_lock);
804 ASSERT(zp->z_sa_hdl == NULL);
805 err = sa_buf_hold(zsb->z_os, obj_num, NULL, &db);
806 if (err) {
807 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
808 return (err);
809 }
810
811 dmu_object_info_from_db(db, &doi);
812 if (doi.doi_bonus_type != DMU_OT_SA &&
813 (doi.doi_bonus_type != DMU_OT_ZNODE ||
814 (doi.doi_bonus_type == DMU_OT_ZNODE &&
815 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
816 sa_buf_rele(db, NULL);
817 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
818 return (EINVAL);
819 }
820
821 zfs_znode_sa_init(zsb, zp, db, doi.doi_bonus_type, NULL);
822
823 /* reload cached values */
824 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zsb), NULL,
825 &gen, sizeof (gen));
826 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zsb), NULL,
827 &zp->z_size, sizeof (zp->z_size));
828 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zsb), NULL,
829 &zp->z_links, sizeof (zp->z_links));
830 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
831 &zp->z_pflags, sizeof (zp->z_pflags));
832 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zsb), NULL,
833 &zp->z_atime, sizeof (zp->z_atime));
834 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL,
835 &zp->z_uid, sizeof (zp->z_uid));
836 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL,
837 &zp->z_gid, sizeof (zp->z_gid));
838 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL,
839 &mode, sizeof (mode));
840
841 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) {
842 zfs_znode_dmu_fini(zp);
843 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
844 return (EIO);
845 }
846
847 zp->z_mode = mode;
848
849 if (gen != zp->z_gen) {
850 zfs_znode_dmu_fini(zp);
851 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
852 return (EIO);
853 }
854
855 zp->z_unlinked = (zp->z_links == 0);
856 zp->z_blksz = doi.doi_data_block_size;
857
858 ZFS_OBJ_HOLD_EXIT(zsb, obj_num);
859
860 return (0);
861 }
862
863 void
864 zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
865 {
866 zfs_sb_t *zsb = ZTOZSB(zp);
867 objset_t *os = zsb->z_os;
868 uint64_t obj = zp->z_id;
869 uint64_t acl_obj = zfs_external_acl(zp);
870
871 ZFS_OBJ_HOLD_ENTER(zsb, obj);
872 if (acl_obj) {
873 VERIFY(!zp->z_is_sa);
874 VERIFY(0 == dmu_object_free(os, acl_obj, tx));
875 }
876 VERIFY(0 == dmu_object_free(os, obj, tx));
877 zfs_znode_dmu_fini(zp);
878 ZFS_OBJ_HOLD_EXIT(zsb, obj);
879 }
880
881 void
882 zfs_zinactive(znode_t *zp)
883 {
884 zfs_sb_t *zsb = ZTOZSB(zp);
885 uint64_t z_id = zp->z_id;
886
887 ASSERT(zp->z_sa_hdl);
888
889 /*
890 * Don't allow a zfs_zget() while were trying to release this znode
891 */
892 ZFS_OBJ_HOLD_ENTER(zsb, z_id);
893 mutex_enter(&zp->z_lock);
894
895 /*
896 * If this was the last reference to a file with no links,
897 * remove the file from the file system.
898 */
899 if (zp->z_unlinked) {
900 mutex_exit(&zp->z_lock);
901 ZFS_OBJ_HOLD_EXIT(zsb, z_id);
902 zfs_rmnode(zp);
903 return;
904 }
905
906 mutex_exit(&zp->z_lock);
907 zfs_znode_dmu_fini(zp);
908 ZFS_OBJ_HOLD_EXIT(zsb, z_id);
909 }
910
911 void
912 zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2],
913 uint64_t ctime[2], boolean_t have_tx)
914 {
915 timestruc_t now;
916
917 gethrestime(&now);
918
919 if (have_tx) { /* will sa_bulk_update happen really soon? */
920 zp->z_atime_dirty = 0;
921 zp->z_seq++;
922 } else {
923 zp->z_atime_dirty = 1;
924 }
925
926 if (flag & ATTR_ATIME) {
927 ZFS_TIME_ENCODE(&now, zp->z_atime);
928 }
929
930 if (flag & ATTR_MTIME) {
931 ZFS_TIME_ENCODE(&now, mtime);
932 if (ZTOZSB(zp)->z_use_fuids) {
933 zp->z_pflags |= (ZFS_ARCHIVE |
934 ZFS_AV_MODIFIED);
935 }
936 }
937
938 if (flag & ATTR_CTIME) {
939 ZFS_TIME_ENCODE(&now, ctime);
940 if (ZTOZSB(zp)->z_use_fuids)
941 zp->z_pflags |= ZFS_ARCHIVE;
942 }
943 }
944
945 /*
946 * Grow the block size for a file.
947 *
948 * IN: zp - znode of file to free data in.
949 * size - requested block size
950 * tx - open transaction.
951 *
952 * NOTE: this function assumes that the znode is write locked.
953 */
954 void
955 zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
956 {
957 int error;
958 u_longlong_t dummy;
959
960 if (size <= zp->z_blksz)
961 return;
962 /*
963 * If the file size is already greater than the current blocksize,
964 * we will not grow. If there is more than one block in a file,
965 * the blocksize cannot change.
966 */
967 if (zp->z_blksz && zp->z_size > zp->z_blksz)
968 return;
969
970 error = dmu_object_set_blocksize(ZTOZSB(zp)->z_os, zp->z_id,
971 size, 0, tx);
972
973 if (error == ENOTSUP)
974 return;
975 ASSERT3U(error, ==, 0);
976
977 /* What blocksize did we actually get? */
978 dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
979 }
980
981 #ifdef HAVE_MMAP
982 /*
983 * This is a dummy interface used when pvn_vplist_dirty() should *not*
984 * be calling back into the fs for a putpage(). E.g.: when truncating
985 * a file, the pages being "thrown away* don't need to be written out.
986 */
987 /* ARGSUSED */
988 static int
989 zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
990 int flags, cred_t *cr)
991 {
992 ASSERT(0);
993 return (0);
994 }
995 #endif /* HAVE_MMAP */
996
997 /*
998 * Increase the file length
999 *
1000 * IN: zp - znode of file to free data in.
1001 * end - new end-of-file
1002 *
1003 * RETURN: 0 if success
1004 * error code if failure
1005 */
1006 static int
1007 zfs_extend(znode_t *zp, uint64_t end)
1008 {
1009 zfs_sb_t *zsb = ZTOZSB(zp);
1010 dmu_tx_t *tx;
1011 rl_t *rl;
1012 uint64_t newblksz;
1013 int error;
1014
1015 /*
1016 * We will change zp_size, lock the whole file.
1017 */
1018 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1019
1020 /*
1021 * Nothing to do if file already at desired length.
1022 */
1023 if (end <= zp->z_size) {
1024 zfs_range_unlock(rl);
1025 return (0);
1026 }
1027 top:
1028 tx = dmu_tx_create(zsb->z_os);
1029 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1030 zfs_sa_upgrade_txholds(tx, zp);
1031 if (end > zp->z_blksz &&
1032 (!ISP2(zp->z_blksz) || zp->z_blksz < zsb->z_max_blksz)) {
1033 /*
1034 * We are growing the file past the current block size.
1035 */
1036 if (zp->z_blksz > ZTOZSB(zp)->z_max_blksz) {
1037 ASSERT(!ISP2(zp->z_blksz));
1038 newblksz = MIN(end, SPA_MAXBLOCKSIZE);
1039 } else {
1040 newblksz = MIN(end, ZTOZSB(zp)->z_max_blksz);
1041 }
1042 dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
1043 } else {
1044 newblksz = 0;
1045 }
1046
1047 error = dmu_tx_assign(tx, TXG_NOWAIT);
1048 if (error) {
1049 if (error == ERESTART) {
1050 dmu_tx_wait(tx);
1051 dmu_tx_abort(tx);
1052 goto top;
1053 }
1054 dmu_tx_abort(tx);
1055 zfs_range_unlock(rl);
1056 return (error);
1057 }
1058
1059 if (newblksz)
1060 zfs_grow_blocksize(zp, newblksz, tx);
1061
1062 zp->z_size = end;
1063
1064 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(ZTOZSB(zp)),
1065 &zp->z_size, sizeof (zp->z_size), tx));
1066
1067 zfs_range_unlock(rl);
1068
1069 dmu_tx_commit(tx);
1070
1071 return (0);
1072 }
1073
1074 /*
1075 * Free space in a file.
1076 *
1077 * IN: zp - znode of file to free data in.
1078 * off - start of section to free.
1079 * len - length of section to free.
1080 *
1081 * RETURN: 0 if success
1082 * error code if failure
1083 */
1084 static int
1085 zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
1086 {
1087 zfs_sb_t *zsb = ZTOZSB(zp);
1088 rl_t *rl;
1089 int error;
1090
1091 /*
1092 * Lock the range being freed.
1093 */
1094 rl = zfs_range_lock(zp, off, len, RL_WRITER);
1095
1096 /*
1097 * Nothing to do if file already at desired length.
1098 */
1099 if (off >= zp->z_size) {
1100 zfs_range_unlock(rl);
1101 return (0);
1102 }
1103
1104 if (off + len > zp->z_size)
1105 len = zp->z_size - off;
1106
1107 error = dmu_free_long_range(zsb->z_os, zp->z_id, off, len);
1108
1109 zfs_range_unlock(rl);
1110
1111 return (error);
1112 }
1113
1114 /*
1115 * Truncate a file
1116 *
1117 * IN: zp - znode of file to free data in.
1118 * end - new end-of-file.
1119 *
1120 * RETURN: 0 if success
1121 * error code if failure
1122 */
1123 static int
1124 zfs_trunc(znode_t *zp, uint64_t end)
1125 {
1126 zfs_sb_t *zsb = ZTOZSB(zp);
1127 dmu_tx_t *tx;
1128 rl_t *rl;
1129 int error;
1130 sa_bulk_attr_t bulk[2];
1131 int count = 0;
1132
1133 /*
1134 * We will change zp_size, lock the whole file.
1135 */
1136 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1137
1138 /*
1139 * Nothing to do if file already at desired length.
1140 */
1141 if (end >= zp->z_size) {
1142 zfs_range_unlock(rl);
1143 return (0);
1144 }
1145
1146 error = dmu_free_long_range(zsb->z_os, zp->z_id, end, -1);
1147 if (error) {
1148 zfs_range_unlock(rl);
1149 return (error);
1150 }
1151 top:
1152 tx = dmu_tx_create(zsb->z_os);
1153 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1154 zfs_sa_upgrade_txholds(tx, zp);
1155 error = dmu_tx_assign(tx, TXG_NOWAIT);
1156 if (error) {
1157 if (error == ERESTART) {
1158 dmu_tx_wait(tx);
1159 dmu_tx_abort(tx);
1160 goto top;
1161 }
1162 dmu_tx_abort(tx);
1163 zfs_range_unlock(rl);
1164 return (error);
1165 }
1166
1167 zp->z_size = end;
1168 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zsb),
1169 NULL, &zp->z_size, sizeof (zp->z_size));
1170
1171 if (end == 0) {
1172 zp->z_pflags &= ~ZFS_SPARSE;
1173 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb),
1174 NULL, &zp->z_pflags, 8);
1175 }
1176 VERIFY(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx) == 0);
1177
1178 dmu_tx_commit(tx);
1179
1180 zfs_range_unlock(rl);
1181
1182 return (0);
1183 }
1184
1185 /*
1186 * Free space in a file
1187 *
1188 * IN: zp - znode of file to free data in.
1189 * off - start of range
1190 * len - end of range (0 => EOF)
1191 * flag - current file open mode flags.
1192 * log - TRUE if this action should be logged
1193 *
1194 * RETURN: 0 if success
1195 * error code if failure
1196 */
1197 int
1198 zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
1199 {
1200 #ifdef HAVE_MANDLOCKS
1201 struct inode *ip = ZTOI(zp);
1202 #endif /* HAVE_MANDLOCKS */
1203 dmu_tx_t *tx;
1204 zfs_sb_t *zsb = ZTOZSB(zp);
1205 zilog_t *zilog = zsb->z_log;
1206 uint64_t mode;
1207 uint64_t mtime[2], ctime[2];
1208 sa_bulk_attr_t bulk[3];
1209 int count = 0;
1210 int error;
1211
1212 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zsb), &mode,
1213 sizeof (mode))) != 0)
1214 return (error);
1215
1216 if (off > zp->z_size) {
1217 error = zfs_extend(zp, off+len);
1218 if (error == 0 && log)
1219 goto log;
1220 else
1221 return (error);
1222 }
1223
1224 #ifdef HAVE_MANDLOCKS
1225 /*
1226 * Check for any locks in the region to be freed.
1227 */
1228
1229 if (MANDLOCK(ip, (mode_t)mode)) {
1230 uint64_t length = (len ? len : zp->z_size - off);
1231 if (error = chklock(ip, FWRITE, off, length, flag, NULL))
1232 return (error);
1233 }
1234 #endif /* HAVE_MANDLOCKS */
1235
1236 if (len == 0) {
1237 error = zfs_trunc(zp, off);
1238 } else {
1239 if ((error = zfs_free_range(zp, off, len)) == 0 &&
1240 off + len > zp->z_size)
1241 error = zfs_extend(zp, off+len);
1242 }
1243 if (error || !log)
1244 return (error);
1245 log:
1246 tx = dmu_tx_create(zsb->z_os);
1247 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1248 zfs_sa_upgrade_txholds(tx, zp);
1249 error = dmu_tx_assign(tx, TXG_NOWAIT);
1250 if (error) {
1251 if (error == ERESTART) {
1252 dmu_tx_wait(tx);
1253 dmu_tx_abort(tx);
1254 goto log;
1255 }
1256 dmu_tx_abort(tx);
1257 return (error);
1258 }
1259
1260 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zsb), NULL, mtime, 16);
1261 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zsb), NULL, ctime, 16);
1262 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb),
1263 NULL, &zp->z_pflags, 8);
1264 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
1265 error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
1266 ASSERT(error == 0);
1267
1268 zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
1269
1270 dmu_tx_commit(tx);
1271 zfs_inode_update(zp);
1272 return (0);
1273 }
1274
1275 void
1276 zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
1277 {
1278 uint64_t moid, obj, sa_obj, version;
1279 uint64_t norm = 0;
1280 nvpair_t *elem;
1281 int error;
1282 timestruc_t now;
1283 dmu_buf_t *db;
1284 znode_phys_t *pzp;
1285
1286 /*
1287 * First attempt to create master node.
1288 */
1289 /*
1290 * In an empty objset, there are no blocks to read and thus
1291 * there can be no i/o errors (which we assert below).
1292 */
1293 moid = MASTER_NODE_OBJ;
1294 error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
1295 DMU_OT_NONE, 0, tx);
1296 ASSERT(error == 0);
1297
1298 /*
1299 * Set starting attributes.
1300 */
1301 version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
1302 elem = NULL;
1303 while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
1304 /* For the moment we expect all zpl props to be uint64_ts */
1305 uint64_t val;
1306 char *name;
1307
1308 ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
1309 VERIFY(nvpair_value_uint64(elem, &val) == 0);
1310 name = nvpair_name(elem);
1311 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
1312 if (val < version)
1313 version = val;
1314 } else {
1315 error = zap_update(os, moid, name, 8, 1, &val, tx);
1316 }
1317 ASSERT(error == 0);
1318 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
1319 norm = val;
1320 }
1321 ASSERT(version != 0);
1322 error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);
1323
1324 /*
1325 * Create zap object used for SA attribute registration
1326 */
1327
1328 if (version >= ZPL_VERSION_SA) {
1329 sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
1330 DMU_OT_NONE, 0, tx);
1331 error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
1332 ASSERT(error == 0);
1333 } else {
1334 sa_obj = 0;
1335 }
1336 /*
1337 * Create a delete queue.
1338 */
1339 obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
1340
1341 error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
1342 ASSERT(error == 0);
1343
1344 /*
1345 * Create root znode with code free of VFS dependencies. This
1346 * is important because without a registered filesystem and super
1347 * block all the required VFS hooks will be missing. The critical
1348 * thing is to just crete the required root znode.
1349 */
1350 obj = zap_create_norm(os, norm, DMU_OT_DIRECTORY_CONTENTS,
1351 DMU_OT_ZNODE, sizeof (znode_phys_t), tx);
1352
1353 VERIFY(0 == dmu_bonus_hold(os, obj, FTAG, &db));
1354 dmu_buf_will_dirty(db, tx);
1355
1356 /*
1357 * Initialize the znode physical data to zero.
1358 */
1359 ASSERT(db->db_size >= sizeof (znode_phys_t));
1360 bzero(db->db_data, db->db_size);
1361 pzp = db->db_data;
1362
1363 if (USE_FUIDS(version, os))
1364 pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
1365
1366 pzp->zp_size = 2; /* "." and ".." */
1367 pzp->zp_links = 2;
1368 pzp->zp_parent = obj;
1369 pzp->zp_gen = dmu_tx_get_txg(tx);
1370 pzp->zp_mode = S_IFDIR | 0755;
1371 pzp->zp_flags = ZFS_ACL_TRIVIAL;
1372
1373 gethrestime(&now);
1374
1375 ZFS_TIME_ENCODE(&now, pzp->zp_crtime);
1376 ZFS_TIME_ENCODE(&now, pzp->zp_ctime);
1377 ZFS_TIME_ENCODE(&now, pzp->zp_atime);
1378 ZFS_TIME_ENCODE(&now, pzp->zp_mtime);
1379
1380 error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &obj, tx);
1381 ASSERT(error == 0);
1382
1383 dmu_buf_rele(db, FTAG);
1384 }
1385
1386 #endif /* _KERNEL */
1387
1388 static int
1389 zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table)
1390 {
1391 uint64_t sa_obj = 0;
1392 int error;
1393
1394 error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
1395 if (error != 0 && error != ENOENT)
1396 return (error);
1397
1398 error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table);
1399 return (error);
1400 }
1401
1402 static int
1403 zfs_grab_sa_handle(objset_t *osp, uint64_t obj, sa_handle_t **hdlp,
1404 dmu_buf_t **db)
1405 {
1406 dmu_object_info_t doi;
1407 int error;
1408
1409 if ((error = sa_buf_hold(osp, obj, FTAG, db)) != 0)
1410 return (error);
1411
1412 dmu_object_info_from_db(*db, &doi);
1413 if ((doi.doi_bonus_type != DMU_OT_SA &&
1414 doi.doi_bonus_type != DMU_OT_ZNODE) ||
1415 (doi.doi_bonus_type == DMU_OT_ZNODE &&
1416 doi.doi_bonus_size < sizeof (znode_phys_t))) {
1417 sa_buf_rele(*db, FTAG);
1418 return (ENOTSUP);
1419 }
1420
1421 error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp);
1422 if (error != 0) {
1423 sa_buf_rele(*db, FTAG);
1424 return (error);
1425 }
1426
1427 return (0);
1428 }
1429
1430 void
1431 zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db)
1432 {
1433 sa_handle_destroy(hdl);
1434 sa_buf_rele(db, FTAG);
1435 }
1436
1437 /*
1438 * Given an object number, return its parent object number and whether
1439 * or not the object is an extended attribute directory.
1440 */
1441 static int
1442 zfs_obj_to_pobj(sa_handle_t *hdl, sa_attr_type_t *sa_table, uint64_t *pobjp,
1443 int *is_xattrdir)
1444 {
1445 uint64_t parent;
1446 uint64_t pflags;
1447 uint64_t mode;
1448 sa_bulk_attr_t bulk[3];
1449 int count = 0;
1450 int error;
1451
1452 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT], NULL,
1453 &parent, sizeof (parent));
1454 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL,
1455 &pflags, sizeof (pflags));
1456 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
1457 &mode, sizeof (mode));
1458
1459 if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0)
1460 return (error);
1461
1462 *pobjp = parent;
1463 *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode);
1464
1465 return (0);
1466 }
1467
1468 /*
1469 * Given an object number, return some zpl level statistics
1470 */
1471 static int
1472 zfs_obj_to_stats_impl(sa_handle_t *hdl, sa_attr_type_t *sa_table,
1473 zfs_stat_t *sb)
1474 {
1475 sa_bulk_attr_t bulk[4];
1476 int count = 0;
1477
1478 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
1479 &sb->zs_mode, sizeof (sb->zs_mode));
1480 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_GEN], NULL,
1481 &sb->zs_gen, sizeof (sb->zs_gen));
1482 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_LINKS], NULL,
1483 &sb->zs_links, sizeof (sb->zs_links));
1484 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_CTIME], NULL,
1485 &sb->zs_ctime, sizeof (sb->zs_ctime));
1486
1487 return (sa_bulk_lookup(hdl, bulk, count));
1488 }
1489
1490 static int
1491 zfs_obj_to_path_impl(objset_t *osp, uint64_t obj, sa_handle_t *hdl,
1492 sa_attr_type_t *sa_table, char *buf, int len)
1493 {
1494 sa_handle_t *sa_hdl;
1495 sa_handle_t *prevhdl = NULL;
1496 dmu_buf_t *prevdb = NULL;
1497 dmu_buf_t *sa_db = NULL;
1498 char *path = buf + len - 1;
1499 int error;
1500
1501 *path = '\0';
1502 sa_hdl = hdl;
1503
1504 for (;;) {
1505 uint64_t pobj;
1506 char component[MAXNAMELEN + 2];
1507 size_t complen;
1508 int is_xattrdir;
1509
1510 if (prevdb)
1511 zfs_release_sa_handle(prevhdl, prevdb);
1512
1513 if ((error = zfs_obj_to_pobj(sa_hdl, sa_table, &pobj,
1514 &is_xattrdir)) != 0)
1515 break;
1516
1517 if (pobj == obj) {
1518 if (path[0] != '/')
1519 *--path = '/';
1520 break;
1521 }
1522
1523 component[0] = '/';
1524 if (is_xattrdir) {
1525 (void) sprintf(component + 1, "<xattrdir>");
1526 } else {
1527 error = zap_value_search(osp, pobj, obj,
1528 ZFS_DIRENT_OBJ(-1ULL), component + 1);
1529 if (error != 0)
1530 break;
1531 }
1532
1533 complen = strlen(component);
1534 path -= complen;
1535 ASSERT(path >= buf);
1536 bcopy(component, path, complen);
1537 obj = pobj;
1538
1539 if (sa_hdl != hdl) {
1540 prevhdl = sa_hdl;
1541 prevdb = sa_db;
1542 }
1543 error = zfs_grab_sa_handle(osp, obj, &sa_hdl, &sa_db);
1544 if (error != 0) {
1545 sa_hdl = prevhdl;
1546 sa_db = prevdb;
1547 break;
1548 }
1549 }
1550
1551 if (sa_hdl != NULL && sa_hdl != hdl) {
1552 ASSERT(sa_db != NULL);
1553 zfs_release_sa_handle(sa_hdl, sa_db);
1554 }
1555
1556 if (error == 0)
1557 (void) memmove(buf, path, buf + len - path);
1558
1559 return (error);
1560 }
1561
1562 int
1563 zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
1564 {
1565 sa_attr_type_t *sa_table;
1566 sa_handle_t *hdl;
1567 dmu_buf_t *db;
1568 int error;
1569
1570 error = zfs_sa_setup(osp, &sa_table);
1571 if (error != 0)
1572 return (error);
1573
1574 error = zfs_grab_sa_handle(osp, obj, &hdl, &db);
1575 if (error != 0)
1576 return (error);
1577
1578 error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
1579
1580 zfs_release_sa_handle(hdl, db);
1581 return (error);
1582 }
1583
1584 int
1585 zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
1586 char *buf, int len)
1587 {
1588 char *path = buf + len - 1;
1589 sa_attr_type_t *sa_table;
1590 sa_handle_t *hdl;
1591 dmu_buf_t *db;
1592 int error;
1593
1594 *path = '\0';
1595
1596 error = zfs_sa_setup(osp, &sa_table);
1597 if (error != 0)
1598 return (error);
1599
1600 error = zfs_grab_sa_handle(osp, obj, &hdl, &db);
1601 if (error != 0)
1602 return (error);
1603
1604 error = zfs_obj_to_stats_impl(hdl, sa_table, sb);
1605 if (error != 0) {
1606 zfs_release_sa_handle(hdl, db);
1607 return (error);
1608 }
1609
1610 error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
1611
1612 zfs_release_sa_handle(hdl, db);
1613 return (error);
1614 }
1615
1616 #if defined(_KERNEL) && defined(HAVE_SPL)
1617 EXPORT_SYMBOL(zfs_create_fs);
1618 EXPORT_SYMBOL(zfs_obj_to_path);
1619 #endif
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