2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_types.h"
25 #include "xfs_trans.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_quota.h"
41 #include "xfs_utils.h"
42 #include "xfs_trans_priv.h"
43 #include "xfs_inode_item.h"
45 #include "xfs_btree_trace.h"
46 #include "xfs_dir2_trace.h"
50 * Allocate and initialise an xfs_inode.
52 STATIC
struct xfs_inode
*
60 * if this didn't occur in transactions, we could use
61 * KM_MAYFAIL and return NULL here on ENOMEM. Set the
62 * code up to do this anyway.
64 ip
= kmem_zone_alloc(xfs_inode_zone
, KM_SLEEP
);
67 if (inode_init_always(mp
->m_super
, VFS_I(ip
))) {
68 kmem_zone_free(xfs_inode_zone
, ip
);
72 ASSERT(atomic_read(&ip
->i_iocount
) == 0);
73 ASSERT(atomic_read(&ip
->i_pincount
) == 0);
74 ASSERT(!spin_is_locked(&ip
->i_flags_lock
));
75 ASSERT(completion_done(&ip
->i_flush
));
77 /* initialise the xfs inode */
80 memset(&ip
->i_imap
, 0, sizeof(struct xfs_imap
));
82 memset(&ip
->i_df
, 0, sizeof(xfs_ifork_t
));
84 ip
->i_update_core
= 0;
85 ip
->i_delayed_blks
= 0;
86 memset(&ip
->i_d
, 0, sizeof(xfs_icdinode_t
));
91 * Initialize inode's trace buffers.
93 #ifdef XFS_INODE_TRACE
94 ip
->i_trace
= ktrace_alloc(INODE_TRACE_SIZE
, KM_NOFS
);
97 ip
->i_xtrace
= ktrace_alloc(XFS_BMAP_KTRACE_SIZE
, KM_NOFS
);
99 #ifdef XFS_BTREE_TRACE
100 ip
->i_btrace
= ktrace_alloc(XFS_BMBT_KTRACE_SIZE
, KM_NOFS
);
103 ip
->i_rwtrace
= ktrace_alloc(XFS_RW_KTRACE_SIZE
, KM_NOFS
);
105 #ifdef XFS_ILOCK_TRACE
106 ip
->i_lock_trace
= ktrace_alloc(XFS_ILOCK_KTRACE_SIZE
, KM_NOFS
);
108 #ifdef XFS_DIR2_TRACE
109 ip
->i_dir_trace
= ktrace_alloc(XFS_DIR2_KTRACE_SIZE
, KM_NOFS
);
112 /* prevent anyone from using this yet */
113 VFS_I(ip
)->i_state
= I_NEW
|I_LOCK
;
120 struct xfs_inode
*ip
)
122 switch (ip
->i_d
.di_mode
& S_IFMT
) {
126 xfs_idestroy_fork(ip
, XFS_DATA_FORK
);
131 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
133 #ifdef XFS_INODE_TRACE
134 ktrace_free(ip
->i_trace
);
136 #ifdef XFS_BMAP_TRACE
137 ktrace_free(ip
->i_xtrace
);
139 #ifdef XFS_BTREE_TRACE
140 ktrace_free(ip
->i_btrace
);
143 ktrace_free(ip
->i_rwtrace
);
145 #ifdef XFS_ILOCK_TRACE
146 ktrace_free(ip
->i_lock_trace
);
148 #ifdef XFS_DIR2_TRACE
149 ktrace_free(ip
->i_dir_trace
);
154 * Only if we are shutting down the fs will we see an
155 * inode still in the AIL. If it is there, we should remove
156 * it to prevent a use-after-free from occurring.
158 xfs_log_item_t
*lip
= &ip
->i_itemp
->ili_item
;
159 struct xfs_ail
*ailp
= lip
->li_ailp
;
161 ASSERT(((lip
->li_flags
& XFS_LI_IN_AIL
) == 0) ||
162 XFS_FORCED_SHUTDOWN(ip
->i_mount
));
163 if (lip
->li_flags
& XFS_LI_IN_AIL
) {
164 spin_lock(&ailp
->xa_lock
);
165 if (lip
->li_flags
& XFS_LI_IN_AIL
)
166 xfs_trans_ail_delete(ailp
, lip
);
168 spin_unlock(&ailp
->xa_lock
);
170 xfs_inode_item_destroy(ip
);
174 /* asserts to verify all state is correct here */
175 ASSERT(atomic_read(&ip
->i_iocount
) == 0);
176 ASSERT(atomic_read(&ip
->i_pincount
) == 0);
177 ASSERT(!spin_is_locked(&ip
->i_flags_lock
));
178 ASSERT(completion_done(&ip
->i_flush
));
180 kmem_zone_free(xfs_inode_zone
, ip
);
184 * Check the validity of the inode we just found it the cache
188 struct xfs_perag
*pag
,
189 struct xfs_inode
*ip
,
191 int lock_flags
) __releases(pag
->pag_ici_lock
)
193 struct inode
*inode
= VFS_I(ip
);
194 struct xfs_mount
*mp
= ip
->i_mount
;
197 spin_lock(&ip
->i_flags_lock
);
200 * If we are racing with another cache hit that is currently
201 * instantiating this inode or currently recycling it out of
202 * reclaimabe state, wait for the initialisation to complete
205 * XXX(hch): eventually we should do something equivalent to
206 * wait_on_inode to wait for these flags to be cleared
207 * instead of polling for it.
209 if (ip
->i_flags
& (XFS_INEW
|XFS_IRECLAIM
)) {
210 XFS_STATS_INC(xs_ig_frecycle
);
216 * If lookup is racing with unlink return an error immediately.
218 if (ip
->i_d
.di_mode
== 0 && !(flags
& XFS_IGET_CREATE
)) {
224 * If IRECLAIMABLE is set, we've torn down the VFS inode already.
225 * Need to carefully get it back into useable state.
227 if (ip
->i_flags
& XFS_IRECLAIMABLE
) {
228 xfs_itrace_exit_tag(ip
, "xfs_iget.alloc");
231 * We need to set XFS_IRECLAIM to prevent xfs_reclaim_inode
232 * from stomping over us while we recycle the inode. We can't
233 * clear the radix tree reclaimable tag yet as it requires
234 * pag_ici_lock to be held exclusive.
236 ip
->i_flags
|= XFS_IRECLAIM
;
238 spin_unlock(&ip
->i_flags_lock
);
239 read_unlock(&pag
->pag_ici_lock
);
241 error
= -inode_init_always(mp
->m_super
, inode
);
244 * Re-initializing the inode failed, and we are in deep
245 * trouble. Try to re-add it to the reclaim list.
247 read_lock(&pag
->pag_ici_lock
);
248 spin_lock(&ip
->i_flags_lock
);
250 ip
->i_flags
&= ~XFS_INEW
;
251 ip
->i_flags
|= XFS_IRECLAIMABLE
;
252 __xfs_inode_set_reclaim_tag(pag
, ip
);
256 write_lock(&pag
->pag_ici_lock
);
257 spin_lock(&ip
->i_flags_lock
);
258 ip
->i_flags
&= ~(XFS_IRECLAIMABLE
| XFS_IRECLAIM
);
259 ip
->i_flags
|= XFS_INEW
;
260 __xfs_inode_clear_reclaim_tag(mp
, pag
, ip
);
261 inode
->i_state
= I_LOCK
|I_NEW
;
262 spin_unlock(&ip
->i_flags_lock
);
263 write_unlock(&pag
->pag_ici_lock
);
265 /* If the VFS inode is being torn down, pause and try again. */
271 /* We've got a live one. */
272 spin_unlock(&ip
->i_flags_lock
);
273 read_unlock(&pag
->pag_ici_lock
);
277 xfs_ilock(ip
, lock_flags
);
279 xfs_iflags_clear(ip
, XFS_ISTALE
);
280 xfs_itrace_exit_tag(ip
, "xfs_iget.found");
281 XFS_STATS_INC(xs_ig_found
);
285 spin_unlock(&ip
->i_flags_lock
);
286 read_unlock(&pag
->pag_ici_lock
);
293 struct xfs_mount
*mp
,
294 struct xfs_perag
*pag
,
297 struct xfs_inode
**ipp
,
299 int lock_flags
) __releases(pag
->pag_ici_lock
)
301 struct xfs_inode
*ip
;
303 unsigned long first_index
, mask
;
304 xfs_agino_t agino
= XFS_INO_TO_AGINO(mp
, ino
);
306 ip
= xfs_inode_alloc(mp
, ino
);
310 error
= xfs_iread(mp
, tp
, ip
, flags
);
314 xfs_itrace_exit_tag(ip
, "xfs_iget.alloc");
316 if ((ip
->i_d
.di_mode
== 0) && !(flags
& XFS_IGET_CREATE
)) {
322 * Preload the radix tree so we can insert safely under the
323 * write spinlock. Note that we cannot sleep inside the preload
326 if (radix_tree_preload(GFP_KERNEL
)) {
332 * Because the inode hasn't been added to the radix-tree yet it can't
333 * be found by another thread, so we can do the non-sleeping lock here.
336 if (!xfs_ilock_nowait(ip
, lock_flags
))
340 mask
= ~(((XFS_INODE_CLUSTER_SIZE(mp
) >> mp
->m_sb
.sb_inodelog
)) - 1);
341 first_index
= agino
& mask
;
342 write_lock(&pag
->pag_ici_lock
);
344 /* insert the new inode */
345 error
= radix_tree_insert(&pag
->pag_ici_root
, agino
, ip
);
346 if (unlikely(error
)) {
347 WARN_ON(error
!= -EEXIST
);
348 XFS_STATS_INC(xs_ig_dup
);
350 goto out_preload_end
;
353 /* These values _must_ be set before releasing the radix tree lock! */
354 ip
->i_udquot
= ip
->i_gdquot
= NULL
;
355 xfs_iflags_set(ip
, XFS_INEW
);
357 write_unlock(&pag
->pag_ici_lock
);
358 radix_tree_preload_end();
363 write_unlock(&pag
->pag_ici_lock
);
364 radix_tree_preload_end();
366 xfs_iunlock(ip
, lock_flags
);
368 __destroy_inode(VFS_I(ip
));
374 * Look up an inode by number in the given file system.
375 * The inode is looked up in the cache held in each AG.
376 * If the inode is found in the cache, initialise the vfs inode
379 * If it is not in core, read it in from the file system's device,
380 * add it to the cache and initialise the vfs inode.
382 * The inode is locked according to the value of the lock_flags parameter.
383 * This flag parameter indicates how and if the inode's IO lock and inode lock
386 * mp -- the mount point structure for the current file system. It points
387 * to the inode hash table.
388 * tp -- a pointer to the current transaction if there is one. This is
389 * simply passed through to the xfs_iread() call.
390 * ino -- the number of the inode desired. This is the unique identifier
391 * within the file system for the inode being requested.
392 * lock_flags -- flags indicating how to lock the inode. See the comment
393 * for xfs_ilock() for a list of valid values.
409 /* the radix tree exists only in inode capable AGs */
410 if (XFS_INO_TO_AGNO(mp
, ino
) >= mp
->m_maxagi
)
413 /* get the perag structure and ensure that it's inode capable */
414 pag
= xfs_get_perag(mp
, ino
);
415 if (!pag
->pagi_inodeok
)
417 ASSERT(pag
->pag_ici_init
);
418 agino
= XFS_INO_TO_AGINO(mp
, ino
);
422 read_lock(&pag
->pag_ici_lock
);
423 ip
= radix_tree_lookup(&pag
->pag_ici_root
, agino
);
426 error
= xfs_iget_cache_hit(pag
, ip
, flags
, lock_flags
);
428 goto out_error_or_again
;
430 read_unlock(&pag
->pag_ici_lock
);
431 XFS_STATS_INC(xs_ig_missed
);
433 error
= xfs_iget_cache_miss(mp
, pag
, tp
, ino
, &ip
,
436 goto out_error_or_again
;
438 xfs_put_perag(mp
, pag
);
442 ASSERT(ip
->i_df
.if_ext_max
==
443 XFS_IFORK_DSIZE(ip
) / sizeof(xfs_bmbt_rec_t
));
445 * If we have a real type for an on-disk inode, we can set ops(&unlock)
446 * now. If it's a new inode being created, xfs_ialloc will handle it.
448 if (xfs_iflags_test(ip
, XFS_INEW
) && ip
->i_d
.di_mode
!= 0)
453 if (error
== EAGAIN
) {
457 xfs_put_perag(mp
, pag
);
462 * Decrement reference count of an inode structure and unlock it.
464 * ip -- the inode being released
465 * lock_flags -- this parameter indicates the inode's locks to be
466 * to be released. See the comment on xfs_iunlock() for a list
470 xfs_iput(xfs_inode_t
*ip
,
473 xfs_itrace_entry(ip
);
474 xfs_iunlock(ip
, lock_flags
);
479 * Special iput for brand-new inodes that are still locked
486 struct inode
*inode
= VFS_I(ip
);
488 xfs_itrace_entry(ip
);
490 if ((ip
->i_d
.di_mode
== 0)) {
491 ASSERT(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
492 make_bad_inode(inode
);
494 if (inode
->i_state
& I_NEW
)
495 unlock_new_inode(inode
);
497 xfs_iunlock(ip
, lock_flags
);
502 * This is called free all the memory associated with an inode.
503 * It must free the inode itself and any buffers allocated for
504 * if_extents/if_data and if_broot. It must also free the lock
505 * associated with the inode.
507 * Note: because we don't initialise everything on reallocation out
508 * of the zone, we must ensure we nullify everything correctly before
509 * freeing the structure.
513 struct xfs_inode
*ip
)
515 struct xfs_mount
*mp
= ip
->i_mount
;
516 struct xfs_perag
*pag
;
517 xfs_agino_t agino
= XFS_INO_TO_AGINO(mp
, ip
->i_ino
);
519 XFS_STATS_INC(xs_ig_reclaims
);
522 * Remove the inode from the per-AG radix tree.
524 * Because radix_tree_delete won't complain even if the item was never
525 * added to the tree assert that it's been there before to catch
526 * problems with the inode life time early on.
528 pag
= xfs_get_perag(mp
, ip
->i_ino
);
529 write_lock(&pag
->pag_ici_lock
);
530 if (!radix_tree_delete(&pag
->pag_ici_root
, agino
))
532 __xfs_inode_clear_reclaim(pag
, ip
);
533 write_unlock(&pag
->pag_ici_lock
);
534 xfs_put_perag(mp
, pag
);
537 * Here we do an (almost) spurious inode lock in order to coordinate
538 * with inode cache radix tree lookups. This is because the lookup
539 * can reference the inodes in the cache without taking references.
541 * We make that OK here by ensuring that we wait until the inode is
542 * unlocked after the lookup before we go ahead and free it. We get
543 * both the ilock and the iolock because the code may need to drop the
544 * ilock one but will still hold the iolock.
546 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
548 xfs_iunlock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
554 * This is a wrapper routine around the xfs_ilock() routine
555 * used to centralize some grungy code. It is used in places
556 * that wish to lock the inode solely for reading the extents.
557 * The reason these places can't just call xfs_ilock(SHARED)
558 * is that the inode lock also guards to bringing in of the
559 * extents from disk for a file in b-tree format. If the inode
560 * is in b-tree format, then we need to lock the inode exclusively
561 * until the extents are read in. Locking it exclusively all
562 * the time would limit our parallelism unnecessarily, though.
563 * What we do instead is check to see if the extents have been
564 * read in yet, and only lock the inode exclusively if they
567 * The function returns a value which should be given to the
568 * corresponding xfs_iunlock_map_shared(). This value is
569 * the mode in which the lock was actually taken.
572 xfs_ilock_map_shared(
577 if ((ip
->i_d
.di_format
== XFS_DINODE_FMT_BTREE
) &&
578 ((ip
->i_df
.if_flags
& XFS_IFEXTENTS
) == 0)) {
579 lock_mode
= XFS_ILOCK_EXCL
;
581 lock_mode
= XFS_ILOCK_SHARED
;
584 xfs_ilock(ip
, lock_mode
);
590 * This is simply the unlock routine to go with xfs_ilock_map_shared().
591 * All it does is call xfs_iunlock() with the given lock_mode.
594 xfs_iunlock_map_shared(
596 unsigned int lock_mode
)
598 xfs_iunlock(ip
, lock_mode
);
602 * The xfs inode contains 2 locks: a multi-reader lock called the
603 * i_iolock and a multi-reader lock called the i_lock. This routine
604 * allows either or both of the locks to be obtained.
606 * The 2 locks should always be ordered so that the IO lock is
607 * obtained first in order to prevent deadlock.
609 * ip -- the inode being locked
610 * lock_flags -- this parameter indicates the inode's locks
611 * to be locked. It can be:
616 * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
617 * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
618 * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
619 * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
627 * You can't set both SHARED and EXCL for the same lock,
628 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
629 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
631 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
632 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
633 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
634 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
635 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_LOCK_DEP_MASK
)) == 0);
637 if (lock_flags
& XFS_IOLOCK_EXCL
)
638 mrupdate_nested(&ip
->i_iolock
, XFS_IOLOCK_DEP(lock_flags
));
639 else if (lock_flags
& XFS_IOLOCK_SHARED
)
640 mraccess_nested(&ip
->i_iolock
, XFS_IOLOCK_DEP(lock_flags
));
642 if (lock_flags
& XFS_ILOCK_EXCL
)
643 mrupdate_nested(&ip
->i_lock
, XFS_ILOCK_DEP(lock_flags
));
644 else if (lock_flags
& XFS_ILOCK_SHARED
)
645 mraccess_nested(&ip
->i_lock
, XFS_ILOCK_DEP(lock_flags
));
647 xfs_ilock_trace(ip
, 1, lock_flags
, (inst_t
*)__return_address
);
651 * This is just like xfs_ilock(), except that the caller
652 * is guaranteed not to sleep. It returns 1 if it gets
653 * the requested locks and 0 otherwise. If the IO lock is
654 * obtained but the inode lock cannot be, then the IO lock
655 * is dropped before returning.
657 * ip -- the inode being locked
658 * lock_flags -- this parameter indicates the inode's locks to be
659 * to be locked. See the comment for xfs_ilock() for a list
668 * You can't set both SHARED and EXCL for the same lock,
669 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
670 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
672 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
673 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
674 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
675 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
676 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_LOCK_DEP_MASK
)) == 0);
678 if (lock_flags
& XFS_IOLOCK_EXCL
) {
679 if (!mrtryupdate(&ip
->i_iolock
))
681 } else if (lock_flags
& XFS_IOLOCK_SHARED
) {
682 if (!mrtryaccess(&ip
->i_iolock
))
685 if (lock_flags
& XFS_ILOCK_EXCL
) {
686 if (!mrtryupdate(&ip
->i_lock
))
687 goto out_undo_iolock
;
688 } else if (lock_flags
& XFS_ILOCK_SHARED
) {
689 if (!mrtryaccess(&ip
->i_lock
))
690 goto out_undo_iolock
;
692 xfs_ilock_trace(ip
, 2, lock_flags
, (inst_t
*)__return_address
);
696 if (lock_flags
& XFS_IOLOCK_EXCL
)
697 mrunlock_excl(&ip
->i_iolock
);
698 else if (lock_flags
& XFS_IOLOCK_SHARED
)
699 mrunlock_shared(&ip
->i_iolock
);
705 * xfs_iunlock() is used to drop the inode locks acquired with
706 * xfs_ilock() and xfs_ilock_nowait(). The caller must pass
707 * in the flags given to xfs_ilock() or xfs_ilock_nowait() so
708 * that we know which locks to drop.
710 * ip -- the inode being unlocked
711 * lock_flags -- this parameter indicates the inode's locks to be
712 * to be unlocked. See the comment for xfs_ilock() for a list
713 * of valid values for this parameter.
722 * You can't set both SHARED and EXCL for the same lock,
723 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
724 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
726 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
727 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
728 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
729 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
730 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_IUNLOCK_NONOTIFY
|
731 XFS_LOCK_DEP_MASK
)) == 0);
732 ASSERT(lock_flags
!= 0);
734 if (lock_flags
& XFS_IOLOCK_EXCL
)
735 mrunlock_excl(&ip
->i_iolock
);
736 else if (lock_flags
& XFS_IOLOCK_SHARED
)
737 mrunlock_shared(&ip
->i_iolock
);
739 if (lock_flags
& XFS_ILOCK_EXCL
)
740 mrunlock_excl(&ip
->i_lock
);
741 else if (lock_flags
& XFS_ILOCK_SHARED
)
742 mrunlock_shared(&ip
->i_lock
);
744 if ((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) &&
745 !(lock_flags
& XFS_IUNLOCK_NONOTIFY
) && ip
->i_itemp
) {
747 * Let the AIL know that this item has been unlocked in case
748 * it is in the AIL and anyone is waiting on it. Don't do
749 * this if the caller has asked us not to.
751 xfs_trans_unlocked_item(ip
->i_itemp
->ili_item
.li_ailp
,
752 (xfs_log_item_t
*)(ip
->i_itemp
));
754 xfs_ilock_trace(ip
, 3, lock_flags
, (inst_t
*)__return_address
);
758 * give up write locks. the i/o lock cannot be held nested
759 * if it is being demoted.
766 ASSERT(lock_flags
& (XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
));
767 ASSERT((lock_flags
& ~(XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
)) == 0);
769 if (lock_flags
& XFS_ILOCK_EXCL
)
770 mrdemote(&ip
->i_lock
);
771 if (lock_flags
& XFS_IOLOCK_EXCL
)
772 mrdemote(&ip
->i_iolock
);
777 * Debug-only routine, without additional rw_semaphore APIs, we can
778 * now only answer requests regarding whether we hold the lock for write
779 * (reader state is outside our visibility, we only track writer state).
781 * Note: this means !xfs_isilocked would give false positives, so don't do that.
788 if ((lock_flags
& (XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
)) ==
790 if (!ip
->i_lock
.mr_writer
)
794 if ((lock_flags
& (XFS_IOLOCK_EXCL
|XFS_IOLOCK_SHARED
)) ==
796 if (!ip
->i_iolock
.mr_writer
)
804 #ifdef XFS_INODE_TRACE
806 #define KTRACE_ENTER(ip, vk, s, line, ra) \
807 ktrace_enter((ip)->i_trace, \
808 /* 0 */ (void *)(__psint_t)(vk), \
809 /* 1 */ (void *)(s), \
810 /* 2 */ (void *)(__psint_t) line, \
811 /* 3 */ (void *)(__psint_t)atomic_read(&VFS_I(ip)->i_count), \
812 /* 4 */ (void *)(ra), \
814 /* 6 */ (void *)(__psint_t)current_cpu(), \
815 /* 7 */ (void *)(__psint_t)current_pid(), \
816 /* 8 */ (void *)__return_address, \
817 /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL)
820 * Vnode tracing code.
823 _xfs_itrace_entry(xfs_inode_t
*ip
, const char *func
, inst_t
*ra
)
825 KTRACE_ENTER(ip
, INODE_KTRACE_ENTRY
, func
, 0, ra
);
829 _xfs_itrace_exit(xfs_inode_t
*ip
, const char *func
, inst_t
*ra
)
831 KTRACE_ENTER(ip
, INODE_KTRACE_EXIT
, func
, 0, ra
);
835 xfs_itrace_hold(xfs_inode_t
*ip
, char *file
, int line
, inst_t
*ra
)
837 KTRACE_ENTER(ip
, INODE_KTRACE_HOLD
, file
, line
, ra
);
841 _xfs_itrace_ref(xfs_inode_t
*ip
, char *file
, int line
, inst_t
*ra
)
843 KTRACE_ENTER(ip
, INODE_KTRACE_REF
, file
, line
, ra
);
847 xfs_itrace_rele(xfs_inode_t
*ip
, char *file
, int line
, inst_t
*ra
)
849 KTRACE_ENTER(ip
, INODE_KTRACE_RELE
, file
, line
, ra
);
851 #endif /* XFS_INODE_TRACE */