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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2022 Oracle. All Rights Reserved.
4 * Author: Allison Henderson <allison.henderson@oracle.com>
5 */
6
7#include "xfs.h"
8#include "xfs_fs.h"
9#include "xfs_format.h"
10#include "xfs_trans_resv.h"
11#include "xfs_shared.h"
12#include "xfs_mount.h"
13#include "xfs_defer.h"
14#include "xfs_log_format.h"
15#include "xfs_trans.h"
16#include "xfs_bmap_btree.h"
17#include "xfs_trans_priv.h"
18#include "xfs_log.h"
19#include "xfs_inode.h"
20#include "xfs_da_format.h"
21#include "xfs_da_btree.h"
22#include "xfs_attr.h"
23#include "xfs_attr_item.h"
24#include "xfs_trace.h"
25#include "xfs_trans_space.h"
26#include "xfs_errortag.h"
27#include "xfs_error.h"
28#include "xfs_log_priv.h"
29#include "xfs_log_recover.h"
30
31struct kmem_cache *xfs_attri_cache;
32struct kmem_cache *xfs_attrd_cache;
33
34static const struct xfs_item_ops xfs_attri_item_ops;
35static const struct xfs_item_ops xfs_attrd_item_ops;
36static struct xfs_attrd_log_item *xfs_trans_get_attrd(struct xfs_trans *tp,
37 struct xfs_attri_log_item *attrip);
38
39static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip)
40{
41 return container_of(lip, struct xfs_attri_log_item, attri_item);
42}
43
44/*
45 * Shared xattr name/value buffers for logged extended attribute operations
46 *
47 * When logging updates to extended attributes, we can create quite a few
48 * attribute log intent items for a single xattr update. To avoid cycling the
49 * memory allocator and memcpy overhead, the name (and value, for setxattr)
50 * are kept in a refcounted object that is shared across all related log items
51 * and the upper-level deferred work state structure. The shared buffer has
52 * a control structure, followed by the name, and then the value.
53 */
54
55static inline struct xfs_attri_log_nameval *
56xfs_attri_log_nameval_get(
57 struct xfs_attri_log_nameval *nv)
58{
59 if (!refcount_inc_not_zero(&nv->refcount))
60 return NULL;
61 return nv;
62}
63
64static inline void
65xfs_attri_log_nameval_put(
66 struct xfs_attri_log_nameval *nv)
67{
68 if (!nv)
69 return;
70 if (refcount_dec_and_test(&nv->refcount))
71 kvfree(nv);
72}
73
74static inline struct xfs_attri_log_nameval *
75xfs_attri_log_nameval_alloc(
76 const void *name,
77 unsigned int name_len,
78 const void *value,
79 unsigned int value_len)
80{
81 struct xfs_attri_log_nameval *nv;
82
83 /*
84 * This could be over 64kB in length, so we have to use kvmalloc() for
85 * this. But kvmalloc() utterly sucks, so we use our own version.
86 */
87 nv = xlog_kvmalloc(sizeof(struct xfs_attri_log_nameval) +
88 name_len + value_len);
89
90 nv->name.i_addr = nv + 1;
91 nv->name.i_len = name_len;
92 nv->name.i_type = XLOG_REG_TYPE_ATTR_NAME;
93 memcpy(nv->name.i_addr, name, name_len);
94
95 if (value_len) {
96 nv->value.i_addr = nv->name.i_addr + name_len;
97 nv->value.i_len = value_len;
98 memcpy(nv->value.i_addr, value, value_len);
99 } else {
100 nv->value.i_addr = NULL;
101 nv->value.i_len = 0;
102 }
103 nv->value.i_type = XLOG_REG_TYPE_ATTR_VALUE;
104
105 refcount_set(&nv->refcount, 1);
106 return nv;
107}
108
109STATIC void
110xfs_attri_item_free(
111 struct xfs_attri_log_item *attrip)
112{
113 kmem_free(attrip->attri_item.li_lv_shadow);
114 xfs_attri_log_nameval_put(attrip->attri_nameval);
115 kmem_cache_free(xfs_attri_cache, attrip);
116}
117
118/*
119 * Freeing the attrip requires that we remove it from the AIL if it has already
120 * been placed there. However, the ATTRI may not yet have been placed in the
121 * AIL when called by xfs_attri_release() from ATTRD processing due to the
122 * ordering of committed vs unpin operations in bulk insert operations. Hence
123 * the reference count to ensure only the last caller frees the ATTRI.
124 */
125STATIC void
126xfs_attri_release(
127 struct xfs_attri_log_item *attrip)
128{
129 ASSERT(atomic_read(&attrip->attri_refcount) > 0);
130 if (!atomic_dec_and_test(&attrip->attri_refcount))
131 return;
132
133 xfs_trans_ail_delete(&attrip->attri_item, 0);
134 xfs_attri_item_free(attrip);
135}
136
137STATIC void
138xfs_attri_item_size(
139 struct xfs_log_item *lip,
140 int *nvecs,
141 int *nbytes)
142{
143 struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
144 struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
145
146 *nvecs += 2;
147 *nbytes += sizeof(struct xfs_attri_log_format) +
148 xlog_calc_iovec_len(nv->name.i_len);
149
150 if (!nv->value.i_len)
151 return;
152
153 *nvecs += 1;
154 *nbytes += xlog_calc_iovec_len(nv->value.i_len);
155}
156
157/*
158 * This is called to fill in the log iovecs for the given attri log
159 * item. We use 1 iovec for the attri_format_item, 1 for the name, and
160 * another for the value if it is present
161 */
162STATIC void
163xfs_attri_item_format(
164 struct xfs_log_item *lip,
165 struct xfs_log_vec *lv)
166{
167 struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
168 struct xfs_log_iovec *vecp = NULL;
169 struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
170
171 attrip->attri_format.alfi_type = XFS_LI_ATTRI;
172 attrip->attri_format.alfi_size = 1;
173
174 /*
175 * This size accounting must be done before copying the attrip into the
176 * iovec. If we do it after, the wrong size will be recorded to the log
177 * and we trip across assertion checks for bad region sizes later during
178 * the log recovery.
179 */
180
181 ASSERT(nv->name.i_len > 0);
182 attrip->attri_format.alfi_size++;
183
184 if (nv->value.i_len > 0)
185 attrip->attri_format.alfi_size++;
186
187 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT,
188 &attrip->attri_format,
189 sizeof(struct xfs_attri_log_format));
190 xlog_copy_from_iovec(lv, &vecp, &nv->name);
191 if (nv->value.i_len > 0)
192 xlog_copy_from_iovec(lv, &vecp, &nv->value);
193}
194
195/*
196 * The unpin operation is the last place an ATTRI is manipulated in the log. It
197 * is either inserted in the AIL or aborted in the event of a log I/O error. In
198 * either case, the ATTRI transaction has been successfully committed to make
199 * it this far. Therefore, we expect whoever committed the ATTRI to either
200 * construct and commit the ATTRD or drop the ATTRD's reference in the event of
201 * error. Simply drop the log's ATTRI reference now that the log is done with
202 * it.
203 */
204STATIC void
205xfs_attri_item_unpin(
206 struct xfs_log_item *lip,
207 int remove)
208{
209 xfs_attri_release(ATTRI_ITEM(lip));
210}
211
212
213STATIC void
214xfs_attri_item_release(
215 struct xfs_log_item *lip)
216{
217 xfs_attri_release(ATTRI_ITEM(lip));
218}
219
220/*
221 * Allocate and initialize an attri item. Caller may allocate an additional
222 * trailing buffer for name and value
223 */
224STATIC struct xfs_attri_log_item *
225xfs_attri_init(
226 struct xfs_mount *mp,
227 struct xfs_attri_log_nameval *nv)
228{
229 struct xfs_attri_log_item *attrip;
230
231 attrip = kmem_cache_zalloc(xfs_attri_cache, GFP_NOFS | __GFP_NOFAIL);
232
233 /*
234 * Grab an extra reference to the name/value buffer for this log item.
235 * The caller retains its own reference!
236 */
237 attrip->attri_nameval = xfs_attri_log_nameval_get(nv);
238 ASSERT(attrip->attri_nameval);
239
240 xfs_log_item_init(mp, &attrip->attri_item, XFS_LI_ATTRI,
241 &xfs_attri_item_ops);
242 attrip->attri_format.alfi_id = (uintptr_t)(void *)attrip;
243 atomic_set(&attrip->attri_refcount, 2);
244
245 return attrip;
246}
247
248static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip)
249{
250 return container_of(lip, struct xfs_attrd_log_item, attrd_item);
251}
252
253STATIC void
254xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp)
255{
256 kmem_free(attrdp->attrd_item.li_lv_shadow);
257 kmem_cache_free(xfs_attrd_cache, attrdp);
258}
259
260STATIC void
261xfs_attrd_item_size(
262 struct xfs_log_item *lip,
263 int *nvecs,
264 int *nbytes)
265{
266 *nvecs += 1;
267 *nbytes += sizeof(struct xfs_attrd_log_format);
268}
269
270/*
271 * This is called to fill in the log iovecs for the given attrd log item. We use
272 * only 1 iovec for the attrd_format, and we point that at the attr_log_format
273 * structure embedded in the attrd item.
274 */
275STATIC void
276xfs_attrd_item_format(
277 struct xfs_log_item *lip,
278 struct xfs_log_vec *lv)
279{
280 struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
281 struct xfs_log_iovec *vecp = NULL;
282
283 attrdp->attrd_format.alfd_type = XFS_LI_ATTRD;
284 attrdp->attrd_format.alfd_size = 1;
285
286 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT,
287 &attrdp->attrd_format,
288 sizeof(struct xfs_attrd_log_format));
289}
290
291/*
292 * The ATTRD is either committed or aborted if the transaction is canceled. If
293 * the transaction is canceled, drop our reference to the ATTRI and free the
294 * ATTRD.
295 */
296STATIC void
297xfs_attrd_item_release(
298 struct xfs_log_item *lip)
299{
300 struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
301
302 xfs_attri_release(attrdp->attrd_attrip);
303 xfs_attrd_item_free(attrdp);
304}
305
306static struct xfs_log_item *
307xfs_attrd_item_intent(
308 struct xfs_log_item *lip)
309{
310 return &ATTRD_ITEM(lip)->attrd_attrip->attri_item;
311}
312
313/*
314 * Performs one step of an attribute update intent and marks the attrd item
315 * dirty.. An attr operation may be a set or a remove. Note that the
316 * transaction is marked dirty regardless of whether the operation succeeds or
317 * fails to support the ATTRI/ATTRD lifecycle rules.
318 */
319STATIC int
320xfs_xattri_finish_update(
321 struct xfs_attr_intent *attr,
322 struct xfs_attrd_log_item *attrdp)
323{
324 struct xfs_da_args *args = attr->xattri_da_args;
325 int error;
326
327 if (XFS_TEST_ERROR(false, args->dp->i_mount, XFS_ERRTAG_LARP)) {
328 error = -EIO;
329 goto out;
330 }
331
332 error = xfs_attr_set_iter(attr);
333 if (!error && attr->xattri_dela_state != XFS_DAS_DONE)
334 error = -EAGAIN;
335out:
336 /*
337 * Mark the transaction dirty, even on error. This ensures the
338 * transaction is aborted, which:
339 *
340 * 1.) releases the ATTRI and frees the ATTRD
341 * 2.) shuts down the filesystem
342 */
343 args->trans->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
344
345 /*
346 * attr intent/done items are null when logged attributes are disabled
347 */
348 if (attrdp)
349 set_bit(XFS_LI_DIRTY, &attrdp->attrd_item.li_flags);
350
351 return error;
352}
353
354/* Log an attr to the intent item. */
355STATIC void
356xfs_attr_log_item(
357 struct xfs_trans *tp,
358 struct xfs_attri_log_item *attrip,
359 const struct xfs_attr_intent *attr)
360{
361 struct xfs_attri_log_format *attrp;
362
363 tp->t_flags |= XFS_TRANS_DIRTY;
364 set_bit(XFS_LI_DIRTY, &attrip->attri_item.li_flags);
365
366 /*
367 * At this point the xfs_attr_intent has been constructed, and we've
368 * created the log intent. Fill in the attri log item and log format
369 * structure with fields from this xfs_attr_intent
370 */
371 attrp = &attrip->attri_format;
372 attrp->alfi_ino = attr->xattri_da_args->dp->i_ino;
373 ASSERT(!(attr->xattri_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK));
374 attrp->alfi_op_flags = attr->xattri_op_flags;
375 attrp->alfi_value_len = attr->xattri_nameval->value.i_len;
376 attrp->alfi_name_len = attr->xattri_nameval->name.i_len;
377 ASSERT(!(attr->xattri_da_args->attr_filter & ~XFS_ATTRI_FILTER_MASK));
378 attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter;
379}
380
381/* Get an ATTRI. */
382static struct xfs_log_item *
383xfs_attr_create_intent(
384 struct xfs_trans *tp,
385 struct list_head *items,
386 unsigned int count,
387 bool sort)
388{
389 struct xfs_mount *mp = tp->t_mountp;
390 struct xfs_attri_log_item *attrip;
391 struct xfs_attr_intent *attr;
392 struct xfs_da_args *args;
393
394 ASSERT(count == 1);
395
396 /*
397 * Each attr item only performs one attribute operation at a time, so
398 * this is a list of one
399 */
400 attr = list_first_entry_or_null(items, struct xfs_attr_intent,
401 xattri_list);
402 args = attr->xattri_da_args;
403
404 if (!(args->op_flags & XFS_DA_OP_LOGGED))
405 return NULL;
406
407 /*
408 * Create a buffer to store the attribute name and value. This buffer
409 * will be shared between the higher level deferred xattr work state
410 * and the lower level xattr log items.
411 */
412 if (!attr->xattri_nameval) {
413 /*
414 * Transfer our reference to the name/value buffer to the
415 * deferred work state structure.
416 */
417 attr->xattri_nameval = xfs_attri_log_nameval_alloc(args->name,
418 args->namelen, args->value, args->valuelen);
419 }
420
421 attrip = xfs_attri_init(mp, attr->xattri_nameval);
422 xfs_trans_add_item(tp, &attrip->attri_item);
423 xfs_attr_log_item(tp, attrip, attr);
424
425 return &attrip->attri_item;
426}
427
428static inline void
429xfs_attr_free_item(
430 struct xfs_attr_intent *attr)
431{
432 if (attr->xattri_da_state)
433 xfs_da_state_free(attr->xattri_da_state);
434 xfs_attri_log_nameval_put(attr->xattri_nameval);
435 if (attr->xattri_da_args->op_flags & XFS_DA_OP_RECOVERY)
436 kmem_free(attr);
437 else
438 kmem_cache_free(xfs_attr_intent_cache, attr);
439}
440
441/* Process an attr. */
442STATIC int
443xfs_attr_finish_item(
444 struct xfs_trans *tp,
445 struct xfs_log_item *done,
446 struct list_head *item,
447 struct xfs_btree_cur **state)
448{
449 struct xfs_attr_intent *attr;
450 struct xfs_attrd_log_item *done_item = NULL;
451 int error;
452
453 attr = container_of(item, struct xfs_attr_intent, xattri_list);
454 if (done)
455 done_item = ATTRD_ITEM(done);
456
457 /*
458 * Always reset trans after EAGAIN cycle
459 * since the transaction is new
460 */
461 attr->xattri_da_args->trans = tp;
462
463 error = xfs_xattri_finish_update(attr, done_item);
464 if (error != -EAGAIN)
465 xfs_attr_free_item(attr);
466
467 return error;
468}
469
470/* Abort all pending ATTRs. */
471STATIC void
472xfs_attr_abort_intent(
473 struct xfs_log_item *intent)
474{
475 xfs_attri_release(ATTRI_ITEM(intent));
476}
477
478/* Cancel an attr */
479STATIC void
480xfs_attr_cancel_item(
481 struct list_head *item)
482{
483 struct xfs_attr_intent *attr;
484
485 attr = container_of(item, struct xfs_attr_intent, xattri_list);
486 xfs_attr_free_item(attr);
487}
488
489STATIC bool
490xfs_attri_item_match(
491 struct xfs_log_item *lip,
492 uint64_t intent_id)
493{
494 return ATTRI_ITEM(lip)->attri_format.alfi_id == intent_id;
495}
496
497/* Is this recovered ATTRI format ok? */
498static inline bool
499xfs_attri_validate(
500 struct xfs_mount *mp,
501 struct xfs_attri_log_format *attrp)
502{
503 unsigned int op = attrp->alfi_op_flags &
504 XFS_ATTRI_OP_FLAGS_TYPE_MASK;
505
506 if (attrp->__pad != 0)
507 return false;
508
509 if (attrp->alfi_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK)
510 return false;
511
512 if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK)
513 return false;
514
515 /* alfi_op_flags should be either a set or remove */
516 switch (op) {
517 case XFS_ATTRI_OP_FLAGS_SET:
518 case XFS_ATTRI_OP_FLAGS_REPLACE:
519 case XFS_ATTRI_OP_FLAGS_REMOVE:
520 break;
521 default:
522 return false;
523 }
524
525 if (attrp->alfi_value_len > XATTR_SIZE_MAX)
526 return false;
527
528 if ((attrp->alfi_name_len > XATTR_NAME_MAX) ||
529 (attrp->alfi_name_len == 0))
530 return false;
531
532 return xfs_verify_ino(mp, attrp->alfi_ino);
533}
534
535/*
536 * Process an attr intent item that was recovered from the log. We need to
537 * delete the attr that it describes.
538 */
539STATIC int
540xfs_attri_item_recover(
541 struct xfs_log_item *lip,
542 struct list_head *capture_list)
543{
544 struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
545 struct xfs_attr_intent *attr;
546 struct xfs_mount *mp = lip->li_log->l_mp;
547 struct xfs_inode *ip;
548 struct xfs_da_args *args;
549 struct xfs_trans *tp;
550 struct xfs_trans_res tres;
551 struct xfs_attri_log_format *attrp;
552 struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
553 int error;
554 int total;
555 int local;
556 struct xfs_attrd_log_item *done_item = NULL;
557
558 /*
559 * First check the validity of the attr described by the ATTRI. If any
560 * are bad, then assume that all are bad and just toss the ATTRI.
561 */
562 attrp = &attrip->attri_format;
563 if (!xfs_attri_validate(mp, attrp) ||
564 !xfs_attr_namecheck(nv->name.i_addr, nv->name.i_len))
565 return -EFSCORRUPTED;
566
567 error = xlog_recover_iget(mp, attrp->alfi_ino, &ip);
568 if (error)
569 return error;
570
571 attr = kmem_zalloc(sizeof(struct xfs_attr_intent) +
572 sizeof(struct xfs_da_args), KM_NOFS);
573 args = (struct xfs_da_args *)(attr + 1);
574
575 attr->xattri_da_args = args;
576 attr->xattri_op_flags = attrp->alfi_op_flags &
577 XFS_ATTRI_OP_FLAGS_TYPE_MASK;
578
579 /*
580 * We're reconstructing the deferred work state structure from the
581 * recovered log item. Grab a reference to the name/value buffer and
582 * attach it to the new work state.
583 */
584 attr->xattri_nameval = xfs_attri_log_nameval_get(nv);
585 ASSERT(attr->xattri_nameval);
586
587 args->dp = ip;
588 args->geo = mp->m_attr_geo;
589 args->whichfork = XFS_ATTR_FORK;
590 args->name = nv->name.i_addr;
591 args->namelen = nv->name.i_len;
592 args->hashval = xfs_da_hashname(args->name, args->namelen);
593 args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
594 args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
595 XFS_DA_OP_LOGGED;
596
597 ASSERT(xfs_sb_version_haslogxattrs(&mp->m_sb));
598
599 switch (attr->xattri_op_flags) {
600 case XFS_ATTRI_OP_FLAGS_SET:
601 case XFS_ATTRI_OP_FLAGS_REPLACE:
602 args->value = nv->value.i_addr;
603 args->valuelen = nv->value.i_len;
604 args->total = xfs_attr_calc_size(args, &local);
605 if (xfs_inode_hasattr(args->dp))
606 attr->xattri_dela_state = xfs_attr_init_replace_state(args);
607 else
608 attr->xattri_dela_state = xfs_attr_init_add_state(args);
609 break;
610 case XFS_ATTRI_OP_FLAGS_REMOVE:
611 if (!xfs_inode_hasattr(args->dp))
612 goto out;
613 attr->xattri_dela_state = xfs_attr_init_remove_state(args);
614 break;
615 default:
616 ASSERT(0);
617 error = -EFSCORRUPTED;
618 goto out;
619 }
620
621 xfs_init_attr_trans(args, &tres, &total);
622 error = xfs_trans_alloc(mp, &tres, total, 0, XFS_TRANS_RESERVE, &tp);
623 if (error)
624 goto out;
625
626 args->trans = tp;
627 done_item = xfs_trans_get_attrd(tp, attrip);
628
629 xfs_ilock(ip, XFS_ILOCK_EXCL);
630 xfs_trans_ijoin(tp, ip, 0);
631
632 error = xfs_xattri_finish_update(attr, done_item);
633 if (error == -EAGAIN) {
634 /*
635 * There's more work to do, so add the intent item to this
636 * transaction so that we can continue it later.
637 */
638 xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_ATTR, &attr->xattri_list);
639 error = xfs_defer_ops_capture_and_commit(tp, capture_list);
640 if (error)
641 goto out_unlock;
642
643 xfs_iunlock(ip, XFS_ILOCK_EXCL);
644 xfs_irele(ip);
645 return 0;
646 }
647 if (error) {
648 xfs_trans_cancel(tp);
649 goto out_unlock;
650 }
651
652 error = xfs_defer_ops_capture_and_commit(tp, capture_list);
653out_unlock:
654 xfs_iunlock(ip, XFS_ILOCK_EXCL);
655 xfs_irele(ip);
656out:
657 xfs_attr_free_item(attr);
658 return error;
659}
660
661/* Re-log an intent item to push the log tail forward. */
662static struct xfs_log_item *
663xfs_attri_item_relog(
664 struct xfs_log_item *intent,
665 struct xfs_trans *tp)
666{
667 struct xfs_attrd_log_item *attrdp;
668 struct xfs_attri_log_item *old_attrip;
669 struct xfs_attri_log_item *new_attrip;
670 struct xfs_attri_log_format *new_attrp;
671 struct xfs_attri_log_format *old_attrp;
672
673 old_attrip = ATTRI_ITEM(intent);
674 old_attrp = &old_attrip->attri_format;
675
676 tp->t_flags |= XFS_TRANS_DIRTY;
677 attrdp = xfs_trans_get_attrd(tp, old_attrip);
678 set_bit(XFS_LI_DIRTY, &attrdp->attrd_item.li_flags);
679
680 /*
681 * Create a new log item that shares the same name/value buffer as the
682 * old log item.
683 */
684 new_attrip = xfs_attri_init(tp->t_mountp, old_attrip->attri_nameval);
685 new_attrp = &new_attrip->attri_format;
686
687 new_attrp->alfi_ino = old_attrp->alfi_ino;
688 new_attrp->alfi_op_flags = old_attrp->alfi_op_flags;
689 new_attrp->alfi_value_len = old_attrp->alfi_value_len;
690 new_attrp->alfi_name_len = old_attrp->alfi_name_len;
691 new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter;
692
693 xfs_trans_add_item(tp, &new_attrip->attri_item);
694 set_bit(XFS_LI_DIRTY, &new_attrip->attri_item.li_flags);
695
696 return &new_attrip->attri_item;
697}
698
699STATIC int
700xlog_recover_attri_commit_pass2(
701 struct xlog *log,
702 struct list_head *buffer_list,
703 struct xlog_recover_item *item,
704 xfs_lsn_t lsn)
705{
706 struct xfs_mount *mp = log->l_mp;
707 struct xfs_attri_log_item *attrip;
708 struct xfs_attri_log_format *attri_formatp;
709 struct xfs_attri_log_nameval *nv;
710 const void *attr_value = NULL;
711 const void *attr_name;
712 size_t len;
713
714 attri_formatp = item->ri_buf[0].i_addr;
715 attr_name = item->ri_buf[1].i_addr;
716
717 /* Validate xfs_attri_log_format before the large memory allocation */
718 len = sizeof(struct xfs_attri_log_format);
719 if (item->ri_buf[0].i_len != len) {
720 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
721 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
722 return -EFSCORRUPTED;
723 }
724
725 if (!xfs_attri_validate(mp, attri_formatp)) {
726 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
727 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
728 return -EFSCORRUPTED;
729 }
730
731 /* Validate the attr name */
732 if (item->ri_buf[1].i_len !=
733 xlog_calc_iovec_len(attri_formatp->alfi_name_len)) {
734 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
735 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
736 return -EFSCORRUPTED;
737 }
738
739 if (!xfs_attr_namecheck(attr_name, attri_formatp->alfi_name_len)) {
740 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
741 item->ri_buf[1].i_addr, item->ri_buf[1].i_len);
742 return -EFSCORRUPTED;
743 }
744
745 /* Validate the attr value, if present */
746 if (attri_formatp->alfi_value_len != 0) {
747 if (item->ri_buf[2].i_len != xlog_calc_iovec_len(attri_formatp->alfi_value_len)) {
748 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
749 item->ri_buf[0].i_addr,
750 item->ri_buf[0].i_len);
751 return -EFSCORRUPTED;
752 }
753
754 attr_value = item->ri_buf[2].i_addr;
755 }
756
757 /*
758 * Memory alloc failure will cause replay to abort. We attach the
759 * name/value buffer to the recovered incore log item and drop our
760 * reference.
761 */
762 nv = xfs_attri_log_nameval_alloc(attr_name,
763 attri_formatp->alfi_name_len, attr_value,
764 attri_formatp->alfi_value_len);
765
766 attrip = xfs_attri_init(mp, nv);
767 memcpy(&attrip->attri_format, attri_formatp, len);
768
769 /*
770 * The ATTRI has two references. One for the ATTRD and one for ATTRI to
771 * ensure it makes it into the AIL. Insert the ATTRI into the AIL
772 * directly and drop the ATTRI reference. Note that
773 * xfs_trans_ail_update() drops the AIL lock.
774 */
775 xfs_trans_ail_insert(log->l_ailp, &attrip->attri_item, lsn);
776 xfs_attri_release(attrip);
777 xfs_attri_log_nameval_put(nv);
778 return 0;
779}
780
781/*
782 * This routine is called to allocate an "attr free done" log item.
783 */
784static struct xfs_attrd_log_item *
785xfs_trans_get_attrd(struct xfs_trans *tp,
786 struct xfs_attri_log_item *attrip)
787{
788 struct xfs_attrd_log_item *attrdp;
789
790 ASSERT(tp != NULL);
791
792 attrdp = kmem_cache_zalloc(xfs_attrd_cache, GFP_NOFS | __GFP_NOFAIL);
793
794 xfs_log_item_init(tp->t_mountp, &attrdp->attrd_item, XFS_LI_ATTRD,
795 &xfs_attrd_item_ops);
796 attrdp->attrd_attrip = attrip;
797 attrdp->attrd_format.alfd_alf_id = attrip->attri_format.alfi_id;
798
799 xfs_trans_add_item(tp, &attrdp->attrd_item);
800 return attrdp;
801}
802
803/* Get an ATTRD so we can process all the attrs. */
804static struct xfs_log_item *
805xfs_attr_create_done(
806 struct xfs_trans *tp,
807 struct xfs_log_item *intent,
808 unsigned int count)
809{
810 if (!intent)
811 return NULL;
812
813 return &xfs_trans_get_attrd(tp, ATTRI_ITEM(intent))->attrd_item;
814}
815
816const struct xfs_defer_op_type xfs_attr_defer_type = {
817 .max_items = 1,
818 .create_intent = xfs_attr_create_intent,
819 .abort_intent = xfs_attr_abort_intent,
820 .create_done = xfs_attr_create_done,
821 .finish_item = xfs_attr_finish_item,
822 .cancel_item = xfs_attr_cancel_item,
823};
824
825/*
826 * This routine is called when an ATTRD format structure is found in a committed
827 * transaction in the log. Its purpose is to cancel the corresponding ATTRI if
828 * it was still in the log. To do this it searches the AIL for the ATTRI with
829 * an id equal to that in the ATTRD format structure. If we find it we drop
830 * the ATTRD reference, which removes the ATTRI from the AIL and frees it.
831 */
832STATIC int
833xlog_recover_attrd_commit_pass2(
834 struct xlog *log,
835 struct list_head *buffer_list,
836 struct xlog_recover_item *item,
837 xfs_lsn_t lsn)
838{
839 struct xfs_attrd_log_format *attrd_formatp;
840
841 attrd_formatp = item->ri_buf[0].i_addr;
842 if (item->ri_buf[0].i_len != sizeof(struct xfs_attrd_log_format)) {
843 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
844 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
845 return -EFSCORRUPTED;
846 }
847
848 xlog_recover_release_intent(log, XFS_LI_ATTRI,
849 attrd_formatp->alfd_alf_id);
850 return 0;
851}
852
853static const struct xfs_item_ops xfs_attri_item_ops = {
854 .flags = XFS_ITEM_INTENT,
855 .iop_size = xfs_attri_item_size,
856 .iop_format = xfs_attri_item_format,
857 .iop_unpin = xfs_attri_item_unpin,
858 .iop_release = xfs_attri_item_release,
859 .iop_recover = xfs_attri_item_recover,
860 .iop_match = xfs_attri_item_match,
861 .iop_relog = xfs_attri_item_relog,
862};
863
864const struct xlog_recover_item_ops xlog_attri_item_ops = {
865 .item_type = XFS_LI_ATTRI,
866 .commit_pass2 = xlog_recover_attri_commit_pass2,
867};
868
869static const struct xfs_item_ops xfs_attrd_item_ops = {
870 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
871 XFS_ITEM_INTENT_DONE,
872 .iop_size = xfs_attrd_item_size,
873 .iop_format = xfs_attrd_item_format,
874 .iop_release = xfs_attrd_item_release,
875 .iop_intent = xfs_attrd_item_intent,
876};
877
878const struct xlog_recover_item_ops xlog_attrd_item_ops = {
879 .item_type = XFS_LI_ATTRD,
880 .commit_pass2 = xlog_recover_attrd_commit_pass2,
881};