xref: /dragonfly/sys/vfs/hammer2/hammer2_ioctl.c (revision 2e0c716d)
1 /*
2  * Copyright (c) 2011-2015 The DragonFly Project.  All rights reserved.
3  *
4  * This code is derived from software contributed to The DragonFly Project
5  * by Matthew Dillon <dillon@dragonflybsd.org>
6  * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in
16  *    the documentation and/or other materials provided with the
17  *    distribution.
18  * 3. Neither the name of The DragonFly Project nor the names of its
19  *    contributors may be used to endorse or promote products derived
20  *    from this software without specific, prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 /*
36  * Ioctl Functions.
37  *
38  * WARNING! The ioctl functions which manipulate the connection state need
39  *	    to be able to run without deadlock on the volume's chain lock.
40  *	    Most of these functions use a separate lock.
41  */
42 
43 #include "hammer2.h"
44 
45 static int hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data);
46 static int hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data);
47 static int hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data);
48 static int hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data);
49 static int hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data);
50 static int hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data);
51 static int hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data);
52 static int hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data);
53 static int hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data);
54 static int hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data);
55 static int hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data);
56 static int hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data);
57 static int hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data);
58 static int hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data);
59 static int hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data);
60 static int hammer2_ioctl_debug_dump(hammer2_inode_t *ip);
61 //static int hammer2_ioctl_inode_comp_set(hammer2_inode_t *ip, void *data);
62 //static int hammer2_ioctl_inode_comp_rec_set(hammer2_inode_t *ip, void *data);
63 //static int hammer2_ioctl_inode_comp_rec_set2(hammer2_inode_t *ip, void *data);
64 static int hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data);
65 
66 int
67 hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag,
68 	      struct ucred *cred)
69 {
70 	int error;
71 
72 	/*
73 	 * Standard root cred checks, will be selectively ignored below
74 	 * for ioctls that do not require root creds.
75 	 */
76 	error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0);
77 
78 	switch(com) {
79 	case HAMMER2IOC_VERSION_GET:
80 		error = hammer2_ioctl_version_get(ip, data);
81 		break;
82 	case HAMMER2IOC_RECLUSTER:
83 		if (error == 0)
84 			error = hammer2_ioctl_recluster(ip, data);
85 		break;
86 	case HAMMER2IOC_REMOTE_SCAN:
87 		if (error == 0)
88 			error = hammer2_ioctl_remote_scan(ip, data);
89 		break;
90 	case HAMMER2IOC_REMOTE_ADD:
91 		if (error == 0)
92 			error = hammer2_ioctl_remote_add(ip, data);
93 		break;
94 	case HAMMER2IOC_REMOTE_DEL:
95 		if (error == 0)
96 			error = hammer2_ioctl_remote_del(ip, data);
97 		break;
98 	case HAMMER2IOC_REMOTE_REP:
99 		if (error == 0)
100 			error = hammer2_ioctl_remote_rep(ip, data);
101 		break;
102 	case HAMMER2IOC_SOCKET_GET:
103 		if (error == 0)
104 			error = hammer2_ioctl_socket_get(ip, data);
105 		break;
106 	case HAMMER2IOC_SOCKET_SET:
107 		if (error == 0)
108 			error = hammer2_ioctl_socket_set(ip, data);
109 		break;
110 	case HAMMER2IOC_PFS_GET:
111 		if (error == 0)
112 			error = hammer2_ioctl_pfs_get(ip, data);
113 		break;
114 	case HAMMER2IOC_PFS_LOOKUP:
115 		if (error == 0)
116 			error = hammer2_ioctl_pfs_lookup(ip, data);
117 		break;
118 	case HAMMER2IOC_PFS_CREATE:
119 		if (error == 0)
120 			error = hammer2_ioctl_pfs_create(ip, data);
121 		break;
122 	case HAMMER2IOC_PFS_DELETE:
123 		if (error == 0)
124 			error = hammer2_ioctl_pfs_delete(ip, data);
125 		break;
126 	case HAMMER2IOC_PFS_SNAPSHOT:
127 		if (error == 0)
128 			error = hammer2_ioctl_pfs_snapshot(ip, data);
129 		break;
130 	case HAMMER2IOC_INODE_GET:
131 		error = hammer2_ioctl_inode_get(ip, data);
132 		break;
133 	case HAMMER2IOC_INODE_SET:
134 		if (error == 0)
135 			error = hammer2_ioctl_inode_set(ip, data);
136 		break;
137 	case HAMMER2IOC_BULKFREE_SCAN:
138 		error = hammer2_ioctl_bulkfree_scan(ip, data);
139 		break;
140 	/*case HAMMER2IOC_INODE_COMP_SET:
141 		error = hammer2_ioctl_inode_comp_set(ip, data);
142 		break;
143 	case HAMMER2IOC_INODE_COMP_REC_SET:
144 	 	error = hammer2_ioctl_inode_comp_rec_set(ip, data);
145 	 	break;
146 	case HAMMER2IOC_INODE_COMP_REC_SET2:
147 		error = hammer2_ioctl_inode_comp_rec_set2(ip, data);
148 		break;*/
149 	case HAMMER2IOC_DEBUG_DUMP:
150 		error = hammer2_ioctl_debug_dump(ip);
151 		break;
152 	default:
153 		error = EOPNOTSUPP;
154 		break;
155 	}
156 	return (error);
157 }
158 
159 /*
160  * Retrieve version and basic info
161  */
162 static int
163 hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data)
164 {
165 	hammer2_mount_t *hmp = ip->pmp->iroot->cluster.focus->hmp;
166 	hammer2_ioc_version_t *version = data;
167 
168 	version->version = hmp->voldata.version;
169 	return 0;
170 }
171 
172 static int
173 hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data)
174 {
175 	hammer2_ioc_recluster_t *recl = data;
176 	struct file *fp;
177 	hammer2_cluster_t *cluster;
178 	int error;
179 
180 	fp = holdfp(curproc->p_fd, recl->fd, -1);
181 	if (fp) {
182 		kprintf("reconnect to cluster: ");
183 		cluster = &ip->pmp->iroot->cluster;
184 		if (cluster->nchains != 1 || cluster->focus == NULL) {
185 			kprintf("not a local device mount\n");
186 			error = EINVAL;
187 		} else {
188 			hammer2_cluster_reconnect(cluster->focus->hmp, fp);
189 			kprintf("ok\n");
190 			error = 0;
191 		}
192 	} else {
193 		error = EINVAL;
194 	}
195 	return error;
196 }
197 
198 /*
199  * Retrieve information about a remote
200  */
201 static int
202 hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data)
203 {
204 	hammer2_mount_t *hmp = ip->pmp->iroot->cluster.focus->hmp;
205 	hammer2_ioc_remote_t *remote = data;
206 	int copyid = remote->copyid;
207 
208 	if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT)
209 		return (EINVAL);
210 
211 	hammer2_voldata_lock(hmp);
212 	remote->copy1 = hmp->voldata.copyinfo[copyid];
213 	hammer2_voldata_unlock(hmp);
214 
215 	/*
216 	 * Adjust nextid (GET only)
217 	 */
218 	while (++copyid < HAMMER2_COPYID_COUNT &&
219 	       hmp->voldata.copyinfo[copyid].copyid == 0) {
220 		;
221 	}
222 	if (copyid == HAMMER2_COPYID_COUNT)
223 		remote->nextid = -1;
224 	else
225 		remote->nextid = copyid;
226 
227 	return(0);
228 }
229 
230 /*
231  * Add new remote entry
232  */
233 static int
234 hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data)
235 {
236 	hammer2_ioc_remote_t *remote = data;
237 	hammer2_pfsmount_t *pmp = ip->pmp;
238 	hammer2_mount_t *hmp;
239 	int copyid = remote->copyid;
240 	int error = 0;
241 
242 	if (copyid >= HAMMER2_COPYID_COUNT)
243 		return (EINVAL);
244 
245 	hmp = pmp->iroot->cluster.focus->hmp; /* XXX */
246 	hammer2_voldata_lock(hmp);
247 	if (copyid < 0) {
248 		for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) {
249 			if (hmp->voldata.copyinfo[copyid].copyid == 0)
250 				break;
251 		}
252 		if (copyid == HAMMER2_COPYID_COUNT) {
253 			error = ENOSPC;
254 			goto failed;
255 		}
256 	}
257 	hammer2_voldata_modify(hmp);
258 	remote->copy1.copyid = copyid;
259 	hmp->voldata.copyinfo[copyid] = remote->copy1;
260 	hammer2_volconf_update(hmp, copyid);
261 failed:
262 	hammer2_voldata_unlock(hmp);
263 	return (error);
264 }
265 
266 /*
267  * Delete existing remote entry
268  */
269 static int
270 hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data)
271 {
272 	hammer2_ioc_remote_t *remote = data;
273 	hammer2_pfsmount_t *pmp = ip->pmp;
274 	hammer2_mount_t *hmp;
275 	int copyid = remote->copyid;
276 	int error = 0;
277 
278 	hmp = pmp->iroot->cluster.focus->hmp; /* XXX */
279 	if (copyid >= HAMMER2_COPYID_COUNT)
280 		return (EINVAL);
281 	remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0;
282 	hammer2_voldata_lock(hmp);
283 	if (copyid < 0) {
284 		for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) {
285 			if (hmp->voldata.copyinfo[copyid].copyid == 0)
286 				continue;
287 			if (strcmp(remote->copy1.path,
288 			    hmp->voldata.copyinfo[copyid].path) == 0) {
289 				break;
290 			}
291 		}
292 		if (copyid == HAMMER2_COPYID_COUNT) {
293 			error = ENOENT;
294 			goto failed;
295 		}
296 	}
297 	hammer2_voldata_modify(hmp);
298 	hmp->voldata.copyinfo[copyid].copyid = 0;
299 	hammer2_volconf_update(hmp, copyid);
300 failed:
301 	hammer2_voldata_unlock(hmp);
302 	return (error);
303 }
304 
305 /*
306  * Replace existing remote entry
307  */
308 static int
309 hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data)
310 {
311 	hammer2_ioc_remote_t *remote = data;
312 	hammer2_mount_t *hmp;
313 	int copyid = remote->copyid;
314 
315 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
316 
317 	if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT)
318 		return (EINVAL);
319 
320 	hammer2_voldata_lock(hmp);
321 	hammer2_voldata_modify(hmp);
322 	/*hammer2_volconf_update(hmp, copyid);*/
323 	hammer2_voldata_unlock(hmp);
324 
325 	return(0);
326 }
327 
328 /*
329  * Retrieve communications socket
330  */
331 static int
332 hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data)
333 {
334 	return (EOPNOTSUPP);
335 }
336 
337 /*
338  * Set communications socket for connection
339  */
340 static int
341 hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data)
342 {
343 	hammer2_ioc_remote_t *remote = data;
344 	hammer2_mount_t *hmp;
345 	int copyid = remote->copyid;
346 
347 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
348 	if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT)
349 		return (EINVAL);
350 
351 	hammer2_voldata_lock(hmp);
352 	hammer2_voldata_unlock(hmp);
353 
354 	return(0);
355 }
356 
357 /*
358  * Used to scan and retrieve PFS information.  PFS's are directories under
359  * the super-root.
360  *
361  * To scan PFSs pass name_key=0.  The function will scan for the next
362  * PFS and set all fields, as well as set name_next to the next key.
363  * When no PFSs remain, name_next is set to (hammer2_key_t)-1.
364  *
365  * To retrieve the PFS associated with the file descriptor, pass
366  * name_key set to (hammer2_key_t)-1.
367  */
368 static int
369 hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data)
370 {
371 	const hammer2_inode_data_t *ripdata;
372 	hammer2_mount_t *hmp;
373 	hammer2_ioc_pfs_t *pfs;
374 	hammer2_cluster_t *cparent;
375 	hammer2_cluster_t *rcluster;
376 	hammer2_cluster_t *cluster;
377 	hammer2_key_t key_next;
378 	int error;
379 	int ddflag;
380 
381 	error = 0;
382 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
383 	pfs = data;
384 	cparent = hammer2_inode_lock_ex(hmp->spmp->iroot);
385 	rcluster = hammer2_inode_lock_ex(ip->pmp->iroot);
386 
387 	/*
388 	 * Search for the first key or specific key.  Remember that keys
389 	 * can be returned in any order.
390 	 */
391 	if (pfs->name_key == 0) {
392 		cluster = hammer2_cluster_lookup(cparent, &key_next,
393 						 0, (hammer2_key_t)-1,
394 						 0, &ddflag);
395 	} else if (pfs->name_key == (hammer2_key_t)-1) {
396 		ripdata = &hammer2_cluster_rdata(rcluster)->ipdata;
397 		cluster = hammer2_cluster_lookup(cparent, &key_next,
398 						 ripdata->name_key,
399 						 ripdata->name_key,
400 						 0, &ddflag);
401 		ripdata = NULL;	/* safety */
402 	} else {
403 		cluster = hammer2_cluster_lookup(cparent, &key_next,
404 						 pfs->name_key, pfs->name_key,
405 						 0, &ddflag);
406 	}
407 	hammer2_inode_unlock_ex(ip->pmp->iroot, rcluster);
408 
409 	while (cluster &&
410 	       hammer2_cluster_type(cluster) != HAMMER2_BREF_TYPE_INODE) {
411 		cluster = hammer2_cluster_next(cparent, cluster, &key_next,
412 					       key_next, (hammer2_key_t)-1,
413 					       0);
414 	}
415 	if (cluster) {
416 		/*
417 		 * Load the data being returned by the ioctl.
418 		 */
419 		ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
420 		pfs->name_key = ripdata->name_key;
421 		pfs->pfs_type = ripdata->pfs_type;
422 		pfs->pfs_clid = ripdata->pfs_clid;
423 		pfs->pfs_fsid = ripdata->pfs_fsid;
424 		KKASSERT(ripdata->name_len < sizeof(pfs->name));
425 		bcopy(ripdata->filename, pfs->name, ripdata->name_len);
426 		pfs->name[ripdata->name_len] = 0;
427 		ripdata = NULL;	/* safety */
428 
429 		/*
430 		 * Calculate the next field
431 		 */
432 		do {
433 			cluster = hammer2_cluster_next(cparent, cluster,
434 						       &key_next,
435 						       0, (hammer2_key_t)-1,
436 						       0);
437 		} while (cluster &&
438 			 hammer2_cluster_type(cluster) !=
439 			  HAMMER2_BREF_TYPE_INODE);
440 		if (cluster) {
441 			ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
442 			pfs->name_next = ripdata->name_key;
443 			hammer2_cluster_unlock(cluster);
444 		} else {
445 			pfs->name_next = (hammer2_key_t)-1;
446 		}
447 	} else {
448 		pfs->name_next = (hammer2_key_t)-1;
449 		error = ENOENT;
450 	}
451 	hammer2_inode_unlock_ex(hmp->spmp->iroot, cparent);
452 
453 	return (error);
454 }
455 
456 /*
457  * Find a specific PFS by name
458  */
459 static int
460 hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data)
461 {
462 	const hammer2_inode_data_t *ripdata;
463 	hammer2_mount_t *hmp;
464 	hammer2_ioc_pfs_t *pfs;
465 	hammer2_cluster_t *cparent;
466 	hammer2_cluster_t *cluster;
467 	hammer2_key_t key_next;
468 	hammer2_key_t lhc;
469 	int error;
470 	int ddflag;
471 	size_t len;
472 
473 	error = 0;
474 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
475 	pfs = data;
476 	cparent = hammer2_inode_lock_sh(hmp->spmp->iroot);
477 
478 	pfs->name[sizeof(pfs->name) - 1] = 0;
479 	len = strlen(pfs->name);
480 	lhc = hammer2_dirhash(pfs->name, len);
481 
482 	cluster = hammer2_cluster_lookup(cparent, &key_next,
483 					 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
484 					 HAMMER2_LOOKUP_SHARED, &ddflag);
485 	while (cluster) {
486 		if (hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE) {
487 			ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
488 			if (ripdata->name_len == len &&
489 			    bcmp(ripdata->filename, pfs->name, len) == 0) {
490 				break;
491 			}
492 			ripdata = NULL;	/* safety */
493 		}
494 		cluster = hammer2_cluster_next(cparent, cluster, &key_next,
495 					   key_next,
496 					   lhc + HAMMER2_DIRHASH_LOMASK,
497 					   HAMMER2_LOOKUP_SHARED);
498 	}
499 
500 	/*
501 	 * Load the data being returned by the ioctl.
502 	 */
503 	if (cluster) {
504 		ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
505 		pfs->name_key = ripdata->name_key;
506 		pfs->pfs_type = ripdata->pfs_type;
507 		pfs->pfs_clid = ripdata->pfs_clid;
508 		pfs->pfs_fsid = ripdata->pfs_fsid;
509 		ripdata = NULL;
510 
511 		hammer2_cluster_unlock(cluster);
512 	} else {
513 		error = ENOENT;
514 	}
515 	hammer2_inode_unlock_sh(hmp->spmp->iroot, cparent);
516 
517 	return (error);
518 }
519 
520 /*
521  * Create a new PFS under the super-root
522  */
523 static int
524 hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data)
525 {
526 	hammer2_inode_data_t *nipdata;
527 	hammer2_mount_t *hmp;
528 	hammer2_ioc_pfs_t *pfs;
529 	hammer2_inode_t *nip;
530 	hammer2_cluster_t *ncluster;
531 	hammer2_trans_t trans;
532 	int error;
533 
534 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
535 	pfs = data;
536 	nip = NULL;
537 
538 	if (pfs->name[0] == 0)
539 		return(EINVAL);
540 	pfs->name[sizeof(pfs->name) - 1] = 0;	/* ensure 0-termination */
541 
542 	hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_NEWINODE);
543 	nip = hammer2_inode_create(&trans, hmp->spmp->iroot, NULL, NULL,
544 				     pfs->name, strlen(pfs->name),
545 				     &ncluster, &error);
546 	if (error == 0) {
547 		nipdata = hammer2_cluster_modify_ip(&trans, nip, ncluster, 0);
548 		nipdata->pfs_type = pfs->pfs_type;
549 		nipdata->pfs_clid = pfs->pfs_clid;
550 		nipdata->pfs_fsid = pfs->pfs_fsid;
551 
552 		/*
553 		 * Do not allow compression on PFS's with the special name
554 		 * "boot", the boot loader can't decompress (yet).
555 		 */
556 		if (strcmp(pfs->name, "boot") == 0)
557 			nipdata->comp_algo = HAMMER2_ENC_ALGO(
558 							HAMMER2_COMP_AUTOZERO);
559 		hammer2_cluster_modsync(ncluster);
560 		hammer2_inode_unlock_ex(nip, ncluster);
561 	}
562 	hammer2_trans_done(&trans);
563 
564 	return (error);
565 }
566 
567 /*
568  * Destroy an existing PFS under the super-root
569  */
570 static int
571 hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data)
572 {
573 	hammer2_mount_t *hmp;
574 	hammer2_ioc_pfs_t *pfs = data;
575 	hammer2_trans_t trans;
576 	int error;
577 
578 	hmp = ip->pmp->iroot->cluster.focus->hmp; /* XXX */
579 	hammer2_trans_init(&trans, ip->pmp, 0);
580 	error = hammer2_unlink_file(&trans, hmp->spmp->iroot,
581 				    pfs->name, strlen(pfs->name),
582 				    2, NULL, NULL, -1);
583 	hammer2_trans_done(&trans);
584 
585 	return (error);
586 }
587 
588 static int
589 hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data)
590 {
591 	hammer2_ioc_pfs_t *pfs = data;
592 	hammer2_trans_t trans;
593 	hammer2_cluster_t *cparent;
594 	int error;
595 
596 	if (pfs->name[0] == 0)
597 		return(EINVAL);
598 	if (pfs->name[sizeof(pfs->name)-1] != 0)
599 		return(EINVAL);
600 
601 	hammer2_vfs_sync(ip->pmp->mp, MNT_WAIT);
602 
603 	hammer2_trans_init(&trans, ip->pmp,
604 			   HAMMER2_TRANS_ISFLUSH | HAMMER2_TRANS_NEWINODE);
605 	cparent = hammer2_inode_lock_ex(ip);
606 	error = hammer2_cluster_snapshot(&trans, cparent, pfs);
607 	hammer2_inode_unlock_ex(ip, cparent);
608 	hammer2_trans_done(&trans);
609 
610 	return (error);
611 }
612 
613 /*
614  * Retrieve the raw inode structure
615  */
616 static int
617 hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data)
618 {
619 	const hammer2_inode_data_t *ripdata;
620 	hammer2_ioc_inode_t *ino;
621 	hammer2_cluster_t *cparent;
622 
623 	ino = data;
624 
625 	cparent = hammer2_inode_lock_sh(ip);
626 	ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
627 	ino->ip_data = *ripdata;
628 	ino->kdata = ip;
629 	hammer2_inode_unlock_sh(ip, cparent);
630 
631 	return (0);
632 }
633 
634 /*
635  * Set various parameters in an inode which cannot be set through
636  * normal filesystem VNOPS.
637  */
638 static int
639 hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data)
640 {
641 	const hammer2_inode_data_t *ripdata;
642 	hammer2_inode_data_t *wipdata;
643 	hammer2_ioc_inode_t *ino = data;
644 	hammer2_cluster_t *cparent;
645 	hammer2_trans_t trans;
646 	int error = 0;
647 	int dosync = 0;
648 
649 	hammer2_trans_init(&trans, ip->pmp, 0);
650 	cparent = hammer2_inode_lock_ex(ip);
651 	ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
652 
653 	if (ino->ip_data.check_algo != ripdata->check_algo) {
654 		wipdata = hammer2_cluster_modify_ip(&trans, ip, cparent, 0);
655 		wipdata->check_algo = ino->ip_data.check_algo;
656 		ripdata = wipdata; /* safety */
657 		hammer2_cluster_setmethod_check(&trans, cparent,
658 						wipdata->check_algo);
659 		dosync = 1;
660 	}
661 	if (ino->ip_data.comp_algo != ripdata->comp_algo) {
662 		wipdata = hammer2_cluster_modify_ip(&trans, ip, cparent, 0);
663 		wipdata->comp_algo = ino->ip_data.comp_algo;
664 		ripdata = wipdata; /* safety */
665 		dosync = 1;
666 	}
667 	ino->kdata = ip;
668 
669 	/* Ignore these flags for now...*/
670 	if (ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) {
671 	}
672 	if (ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) {
673 	}
674 	if (ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) {
675 	}
676 	if (dosync)
677 		hammer2_cluster_modsync(cparent);
678 	hammer2_trans_done(&trans);
679 	hammer2_inode_unlock_ex(ip, cparent);
680 
681 	return (error);
682 }
683 
684 static
685 int
686 hammer2_ioctl_debug_dump(hammer2_inode_t *ip)
687 {
688 	hammer2_chain_t *chain;
689 	int count = 1000;
690 	int i;
691 
692 	for (i = 0; i < ip->cluster.nchains; ++i) {
693 		chain = ip->cluster.array[i];
694 		if (chain == NULL)
695 			continue;
696 		hammer2_dump_chain(chain, 0, &count, 'i');
697 	}
698 	return 0;
699 }
700 
701 static
702 int
703 hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data)
704 {
705 	hammer2_ioc_bulkfree_t *bfi = data;
706 	hammer2_mount_t *hmp = ip->pmp->iroot->cluster.focus->hmp;
707 	int error;
708 
709 	/* XXX run local cluster targets only */
710 	error = hammer2_bulkfree_pass(hmp, bfi);
711 
712 	return error;
713 }
714