2 * Copyright (c) 2000-2002,2005 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"
24 #include "xfs_trans.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_alloc_btree.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_dir2_sf.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dinode.h"
35 #include "xfs_inode.h"
36 #include "xfs_buf_item.h"
37 #include "xfs_trans_priv.h"
38 #include "xfs_error.h"
40 #include "xfs_trace.h"
43 * Check to see if a buffer matching the given parameters is already
44 * a part of the given transaction.
46 STATIC
struct xfs_buf
*
47 xfs_trans_buf_item_match(
49 struct xfs_buftarg
*target
,
53 xfs_log_item_chunk_t
*licp
;
54 xfs_log_item_desc_t
*lidp
;
55 xfs_buf_log_item_t
*blip
;
59 for (licp
= &tp
->t_items
; licp
!= NULL
; licp
= licp
->lic_next
) {
60 if (xfs_lic_are_all_free(licp
)) {
61 ASSERT(licp
== &tp
->t_items
);
62 ASSERT(licp
->lic_next
== NULL
);
66 for (i
= 0; i
< licp
->lic_unused
; i
++) {
68 * Skip unoccupied slots.
70 if (xfs_lic_isfree(licp
, i
))
73 lidp
= xfs_lic_slot(licp
, i
);
74 blip
= (xfs_buf_log_item_t
*)lidp
->lid_item
;
75 if (blip
->bli_item
.li_type
!= XFS_LI_BUF
)
78 if (XFS_BUF_TARGET(blip
->bli_buf
) == target
&&
79 XFS_BUF_ADDR(blip
->bli_buf
) == blkno
&&
80 XFS_BUF_COUNT(blip
->bli_buf
) == len
)
89 * Add the locked buffer to the transaction.
91 * The buffer must be locked, and it cannot be associated with any
94 * If the buffer does not yet have a buf log item associated with it,
95 * then allocate one for it. Then add the buf item to the transaction.
103 struct xfs_buf_log_item
*bip
;
105 ASSERT(XFS_BUF_ISBUSY(bp
));
106 ASSERT(XFS_BUF_FSPRIVATE2(bp
, void *) == NULL
);
109 * The xfs_buf_log_item pointer is stored in b_fsprivate. If
110 * it doesn't have one yet, then allocate one and initialize it.
111 * The checks to see if one is there are in xfs_buf_item_init().
113 xfs_buf_item_init(bp
, tp
->t_mountp
);
114 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
115 ASSERT(!(bip
->bli_flags
& XFS_BLI_STALE
));
116 ASSERT(!(bip
->bli_format
.blf_flags
& XFS_BLF_CANCEL
));
117 ASSERT(!(bip
->bli_flags
& XFS_BLI_LOGGED
));
122 * Take a reference for this transaction on the buf item.
124 atomic_inc(&bip
->bli_refcount
);
127 * Get a log_item_desc to point at the new item.
129 (void) xfs_trans_add_item(tp
, (xfs_log_item_t
*)bip
);
132 * Initialize b_fsprivate2 so we can find it with incore_match()
133 * in xfs_trans_get_buf() and friends above.
135 XFS_BUF_SET_FSPRIVATE2(bp
, tp
);
141 struct xfs_trans
*tp
,
144 _xfs_trans_bjoin(tp
, bp
, 0);
145 trace_xfs_trans_bjoin(bp
->b_fspriv
);
149 * Get and lock the buffer for the caller if it is not already
150 * locked within the given transaction. If it is already locked
151 * within the transaction, just increment its lock recursion count
152 * and return a pointer to it.
154 * If the transaction pointer is NULL, make this just a normal
158 xfs_trans_get_buf(xfs_trans_t
*tp
,
159 xfs_buftarg_t
*target_dev
,
165 xfs_buf_log_item_t
*bip
;
168 flags
= XBF_LOCK
| XBF_MAPPED
;
171 * Default to a normal get_buf() call if the tp is NULL.
174 return xfs_buf_get(target_dev
, blkno
, len
,
175 flags
| XBF_DONT_BLOCK
);
178 * If we find the buffer in the cache with this transaction
179 * pointer in its b_fsprivate2 field, then we know we already
180 * have it locked. In this case we just increment the lock
181 * recursion count and return the buffer to the caller.
183 bp
= xfs_trans_buf_item_match(tp
, target_dev
, blkno
, len
);
185 ASSERT(XFS_BUF_VALUSEMA(bp
) <= 0);
186 if (XFS_FORCED_SHUTDOWN(tp
->t_mountp
))
187 XFS_BUF_SUPER_STALE(bp
);
190 * If the buffer is stale then it was binval'ed
191 * since last read. This doesn't matter since the
192 * caller isn't allowed to use the data anyway.
194 else if (XFS_BUF_ISSTALE(bp
))
195 ASSERT(!XFS_BUF_ISDELAYWRITE(bp
));
197 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
198 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
200 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
202 trace_xfs_trans_get_buf_recur(bip
);
207 * We always specify the XBF_DONT_BLOCK flag within a transaction
208 * so that get_buf does not try to push out a delayed write buffer
209 * which might cause another transaction to take place (if the
210 * buffer was delayed alloc). Such recursive transactions can
211 * easily deadlock with our current transaction as well as cause
212 * us to run out of stack space.
214 bp
= xfs_buf_get(target_dev
, blkno
, len
, flags
| XBF_DONT_BLOCK
);
219 ASSERT(!XFS_BUF_GETERROR(bp
));
221 _xfs_trans_bjoin(tp
, bp
, 1);
222 trace_xfs_trans_get_buf(bp
->b_fspriv
);
227 * Get and lock the superblock buffer of this file system for the
230 * We don't need to use incore_match() here, because the superblock
231 * buffer is a private buffer which we keep a pointer to in the
235 xfs_trans_getsb(xfs_trans_t
*tp
,
236 struct xfs_mount
*mp
,
240 xfs_buf_log_item_t
*bip
;
243 * Default to just trying to lock the superblock buffer
247 return (xfs_getsb(mp
, flags
));
251 * If the superblock buffer already has this transaction
252 * pointer in its b_fsprivate2 field, then we know we already
253 * have it locked. In this case we just increment the lock
254 * recursion count and return the buffer to the caller.
257 if (XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
) {
258 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
260 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
262 trace_xfs_trans_getsb_recur(bip
);
266 bp
= xfs_getsb(mp
, flags
);
270 _xfs_trans_bjoin(tp
, bp
, 1);
271 trace_xfs_trans_getsb(bp
->b_fspriv
);
276 xfs_buftarg_t
*xfs_error_target
;
279 int xfs_error_mod
= 33;
283 * Get and lock the buffer for the caller if it is not already
284 * locked within the given transaction. If it has not yet been
285 * read in, read it from disk. If it is already locked
286 * within the transaction and already read in, just increment its
287 * lock recursion count and return a pointer to it.
289 * If the transaction pointer is NULL, make this just a normal
296 xfs_buftarg_t
*target
,
303 xfs_buf_log_item_t
*bip
;
307 flags
= XBF_LOCK
| XBF_MAPPED
;
310 * Default to a normal get_buf() call if the tp is NULL.
313 bp
= xfs_buf_read(target
, blkno
, len
, flags
| XBF_DONT_BLOCK
);
315 return (flags
& XBF_TRYLOCK
) ?
316 EAGAIN
: XFS_ERROR(ENOMEM
);
318 if (XFS_BUF_GETERROR(bp
) != 0) {
319 xfs_ioerror_alert("xfs_trans_read_buf", mp
,
321 error
= XFS_BUF_GETERROR(bp
);
327 if (xfs_error_target
== target
) {
328 if (((xfs_req_num
++) % xfs_error_mod
) == 0) {
330 cmn_err(CE_DEBUG
, "Returning error!\n");
331 return XFS_ERROR(EIO
);
336 if (XFS_FORCED_SHUTDOWN(mp
))
343 * If we find the buffer in the cache with this transaction
344 * pointer in its b_fsprivate2 field, then we know we already
345 * have it locked. If it is already read in we just increment
346 * the lock recursion count and return the buffer to the caller.
347 * If the buffer is not yet read in, then we read it in, increment
348 * the lock recursion count, and return it to the caller.
350 bp
= xfs_trans_buf_item_match(tp
, target
, blkno
, len
);
352 ASSERT(XFS_BUF_VALUSEMA(bp
) <= 0);
353 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
354 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
355 ASSERT((XFS_BUF_ISERROR(bp
)) == 0);
356 if (!(XFS_BUF_ISDONE(bp
))) {
357 trace_xfs_trans_read_buf_io(bp
, _RET_IP_
);
358 ASSERT(!XFS_BUF_ISASYNC(bp
));
360 xfsbdstrat(tp
->t_mountp
, bp
);
361 error
= xfs_iowait(bp
);
363 xfs_ioerror_alert("xfs_trans_read_buf", mp
,
367 * We can gracefully recover from most read
368 * errors. Ones we can't are those that happen
369 * after the transaction's already dirty.
371 if (tp
->t_flags
& XFS_TRANS_DIRTY
)
372 xfs_force_shutdown(tp
->t_mountp
,
373 SHUTDOWN_META_IO_ERROR
);
378 * We never locked this buf ourselves, so we shouldn't
379 * brelse it either. Just get out.
381 if (XFS_FORCED_SHUTDOWN(mp
)) {
382 trace_xfs_trans_read_buf_shut(bp
, _RET_IP_
);
384 return XFS_ERROR(EIO
);
388 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
391 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
392 trace_xfs_trans_read_buf_recur(bip
);
398 * We always specify the XBF_DONT_BLOCK flag within a transaction
399 * so that get_buf does not try to push out a delayed write buffer
400 * which might cause another transaction to take place (if the
401 * buffer was delayed alloc). Such recursive transactions can
402 * easily deadlock with our current transaction as well as cause
403 * us to run out of stack space.
405 bp
= xfs_buf_read(target
, blkno
, len
, flags
| XBF_DONT_BLOCK
);
410 if (XFS_BUF_GETERROR(bp
) != 0) {
411 XFS_BUF_SUPER_STALE(bp
);
412 error
= XFS_BUF_GETERROR(bp
);
414 xfs_ioerror_alert("xfs_trans_read_buf", mp
,
416 if (tp
->t_flags
& XFS_TRANS_DIRTY
)
417 xfs_force_shutdown(tp
->t_mountp
, SHUTDOWN_META_IO_ERROR
);
422 if (xfs_do_error
&& !(tp
->t_flags
& XFS_TRANS_DIRTY
)) {
423 if (xfs_error_target
== target
) {
424 if (((xfs_req_num
++) % xfs_error_mod
) == 0) {
425 xfs_force_shutdown(tp
->t_mountp
,
426 SHUTDOWN_META_IO_ERROR
);
428 cmn_err(CE_DEBUG
, "Returning trans error!\n");
429 return XFS_ERROR(EIO
);
434 if (XFS_FORCED_SHUTDOWN(mp
))
437 _xfs_trans_bjoin(tp
, bp
, 1);
438 trace_xfs_trans_read_buf(bp
->b_fspriv
);
445 * the theory here is that buffer is good but we're
446 * bailing out because the filesystem is being forcibly
447 * shut down. So we should leave the b_flags alone since
448 * the buffer's not staled and just get out.
451 if (XFS_BUF_ISSTALE(bp
) && XFS_BUF_ISDELAYWRITE(bp
))
452 cmn_err(CE_NOTE
, "about to pop assert, bp == 0x%p", bp
);
454 ASSERT((XFS_BUF_BFLAGS(bp
) & (XBF_STALE
|XBF_DELWRI
)) !=
455 (XBF_STALE
|XBF_DELWRI
));
457 trace_xfs_trans_read_buf_shut(bp
, _RET_IP_
);
460 return XFS_ERROR(EIO
);
465 * Release the buffer bp which was previously acquired with one of the
466 * xfs_trans_... buffer allocation routines if the buffer has not
467 * been modified within this transaction. If the buffer is modified
468 * within this transaction, do decrement the recursion count but do
469 * not release the buffer even if the count goes to 0. If the buffer is not
470 * modified within the transaction, decrement the recursion count and
471 * release the buffer if the recursion count goes to 0.
473 * If the buffer is to be released and it was not modified before
474 * this transaction began, then free the buf_log_item associated with it.
476 * If the transaction pointer is NULL, make this just a normal
480 xfs_trans_brelse(xfs_trans_t
*tp
,
483 xfs_buf_log_item_t
*bip
;
485 xfs_log_item_desc_t
*lidp
;
488 * Default to a normal brelse() call if the tp is NULL.
491 ASSERT(XFS_BUF_FSPRIVATE2(bp
, void *) == NULL
);
493 * If there's a buf log item attached to the buffer,
494 * then let the AIL know that the buffer is being
497 if (XFS_BUF_FSPRIVATE(bp
, void *) != NULL
) {
498 lip
= XFS_BUF_FSPRIVATE(bp
, xfs_log_item_t
*);
499 if (lip
->li_type
== XFS_LI_BUF
) {
500 bip
= XFS_BUF_FSPRIVATE(bp
,xfs_buf_log_item_t
*);
501 xfs_trans_unlocked_item(bip
->bli_item
.li_ailp
,
509 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
510 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
511 ASSERT(bip
->bli_item
.li_type
== XFS_LI_BUF
);
512 ASSERT(!(bip
->bli_flags
& XFS_BLI_STALE
));
513 ASSERT(!(bip
->bli_format
.blf_flags
& XFS_BLF_CANCEL
));
514 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
517 * Find the item descriptor pointing to this buffer's
518 * log item. It must be there.
520 lidp
= xfs_trans_find_item(tp
, (xfs_log_item_t
*)bip
);
521 ASSERT(lidp
!= NULL
);
523 trace_xfs_trans_brelse(bip
);
526 * If the release is just for a recursive lock,
527 * then decrement the count and return.
529 if (bip
->bli_recur
> 0) {
535 * If the buffer is dirty within this transaction, we can't
536 * release it until we commit.
538 if (lidp
->lid_flags
& XFS_LID_DIRTY
)
542 * If the buffer has been invalidated, then we can't release
543 * it until the transaction commits to disk unless it is re-dirtied
544 * as part of this transaction. This prevents us from pulling
545 * the item from the AIL before we should.
547 if (bip
->bli_flags
& XFS_BLI_STALE
)
550 ASSERT(!(bip
->bli_flags
& XFS_BLI_LOGGED
));
553 * Free up the log item descriptor tracking the released item.
555 xfs_trans_free_item(tp
, lidp
);
558 * Clear the hold flag in the buf log item if it is set.
559 * We wouldn't want the next user of the buffer to
562 if (bip
->bli_flags
& XFS_BLI_HOLD
) {
563 bip
->bli_flags
&= ~XFS_BLI_HOLD
;
567 * Drop our reference to the buf log item.
569 atomic_dec(&bip
->bli_refcount
);
572 * If the buf item is not tracking data in the log, then
573 * we must free it before releasing the buffer back to the
574 * free pool. Before releasing the buffer to the free pool,
575 * clear the transaction pointer in b_fsprivate2 to dissolve
576 * its relation to this transaction.
578 if (!xfs_buf_item_dirty(bip
)) {
580 ASSERT(bp->b_pincount == 0);
582 ASSERT(atomic_read(&bip
->bli_refcount
) == 0);
583 ASSERT(!(bip
->bli_item
.li_flags
& XFS_LI_IN_AIL
));
584 ASSERT(!(bip
->bli_flags
& XFS_BLI_INODE_ALLOC_BUF
));
585 xfs_buf_item_relse(bp
);
588 XFS_BUF_SET_FSPRIVATE2(bp
, NULL
);
591 * If we've still got a buf log item on the buffer, then
592 * tell the AIL that the buffer is being unlocked.
595 xfs_trans_unlocked_item(bip
->bli_item
.li_ailp
,
596 (xfs_log_item_t
*)bip
);
604 * Mark the buffer as not needing to be unlocked when the buf item's
605 * IOP_UNLOCK() routine is called. The buffer must already be locked
606 * and associated with the given transaction.
610 xfs_trans_bhold(xfs_trans_t
*tp
,
613 xfs_buf_log_item_t
*bip
;
615 ASSERT(XFS_BUF_ISBUSY(bp
));
616 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
617 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
619 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
620 ASSERT(!(bip
->bli_flags
& XFS_BLI_STALE
));
621 ASSERT(!(bip
->bli_format
.blf_flags
& XFS_BLF_CANCEL
));
622 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
623 bip
->bli_flags
|= XFS_BLI_HOLD
;
624 trace_xfs_trans_bhold(bip
);
628 * Cancel the previous buffer hold request made on this buffer
629 * for this transaction.
632 xfs_trans_bhold_release(xfs_trans_t
*tp
,
635 xfs_buf_log_item_t
*bip
;
637 ASSERT(XFS_BUF_ISBUSY(bp
));
638 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
639 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
641 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
642 ASSERT(!(bip
->bli_flags
& XFS_BLI_STALE
));
643 ASSERT(!(bip
->bli_format
.blf_flags
& XFS_BLF_CANCEL
));
644 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
645 ASSERT(bip
->bli_flags
& XFS_BLI_HOLD
);
646 bip
->bli_flags
&= ~XFS_BLI_HOLD
;
648 trace_xfs_trans_bhold_release(bip
);
652 * This is called to mark bytes first through last inclusive of the given
653 * buffer as needing to be logged when the transaction is committed.
654 * The buffer must already be associated with the given transaction.
656 * First and last are numbers relative to the beginning of this buffer,
657 * so the first byte in the buffer is numbered 0 regardless of the
661 xfs_trans_log_buf(xfs_trans_t
*tp
,
666 xfs_buf_log_item_t
*bip
;
667 xfs_log_item_desc_t
*lidp
;
669 ASSERT(XFS_BUF_ISBUSY(bp
));
670 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
671 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
672 ASSERT((first
<= last
) && (last
< XFS_BUF_COUNT(bp
)));
673 ASSERT((XFS_BUF_IODONE_FUNC(bp
) == NULL
) ||
674 (XFS_BUF_IODONE_FUNC(bp
) == xfs_buf_iodone_callbacks
));
677 * Mark the buffer as needing to be written out eventually,
678 * and set its iodone function to remove the buffer's buf log
679 * item from the AIL and free it when the buffer is flushed
680 * to disk. See xfs_buf_attach_iodone() for more details
681 * on li_cb and xfs_buf_iodone_callbacks().
682 * If we end up aborting this transaction, we trap this buffer
683 * inside the b_bdstrat callback so that this won't get written to
686 XFS_BUF_DELAYWRITE(bp
);
689 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
690 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
691 XFS_BUF_SET_IODONE_FUNC(bp
, xfs_buf_iodone_callbacks
);
692 bip
->bli_item
.li_cb
= (void(*)(xfs_buf_t
*,xfs_log_item_t
*))xfs_buf_iodone
;
694 trace_xfs_trans_log_buf(bip
);
697 * If we invalidated the buffer within this transaction, then
698 * cancel the invalidation now that we're dirtying the buffer
699 * again. There are no races with the code in xfs_buf_item_unpin(),
700 * because we have a reference to the buffer this entire time.
702 if (bip
->bli_flags
& XFS_BLI_STALE
) {
703 bip
->bli_flags
&= ~XFS_BLI_STALE
;
704 ASSERT(XFS_BUF_ISSTALE(bp
));
706 bip
->bli_format
.blf_flags
&= ~XFS_BLF_CANCEL
;
709 lidp
= xfs_trans_find_item(tp
, (xfs_log_item_t
*)bip
);
710 ASSERT(lidp
!= NULL
);
712 tp
->t_flags
|= XFS_TRANS_DIRTY
;
713 lidp
->lid_flags
|= XFS_LID_DIRTY
;
714 bip
->bli_flags
|= XFS_BLI_LOGGED
;
715 xfs_buf_item_log(bip
, first
, last
);
720 * This called to invalidate a buffer that is being used within
721 * a transaction. Typically this is because the blocks in the
722 * buffer are being freed, so we need to prevent it from being
723 * written out when we're done. Allowing it to be written again
724 * might overwrite data in the free blocks if they are reallocated
727 * We prevent the buffer from being written out by clearing the
728 * B_DELWRI flag. We can't always
729 * get rid of the buf log item at this point, though, because
730 * the buffer may still be pinned by another transaction. If that
731 * is the case, then we'll wait until the buffer is committed to
732 * disk for the last time (we can tell by the ref count) and
733 * free it in xfs_buf_item_unpin(). Until it is cleaned up we
734 * will keep the buffer locked so that the buffer and buf log item
742 xfs_log_item_desc_t
*lidp
;
743 xfs_buf_log_item_t
*bip
;
745 ASSERT(XFS_BUF_ISBUSY(bp
));
746 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
747 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
749 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
750 lidp
= xfs_trans_find_item(tp
, (xfs_log_item_t
*)bip
);
751 ASSERT(lidp
!= NULL
);
752 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
754 trace_xfs_trans_binval(bip
);
756 if (bip
->bli_flags
& XFS_BLI_STALE
) {
758 * If the buffer is already invalidated, then
761 ASSERT(!(XFS_BUF_ISDELAYWRITE(bp
)));
762 ASSERT(XFS_BUF_ISSTALE(bp
));
763 ASSERT(!(bip
->bli_flags
& (XFS_BLI_LOGGED
| XFS_BLI_DIRTY
)));
764 ASSERT(!(bip
->bli_format
.blf_flags
& XFS_BLF_INODE_BUF
));
765 ASSERT(bip
->bli_format
.blf_flags
& XFS_BLF_CANCEL
);
766 ASSERT(lidp
->lid_flags
& XFS_LID_DIRTY
);
767 ASSERT(tp
->t_flags
& XFS_TRANS_DIRTY
);
772 * Clear the dirty bit in the buffer and set the STALE flag
773 * in the buf log item. The STALE flag will be used in
774 * xfs_buf_item_unpin() to determine if it should clean up
775 * when the last reference to the buf item is given up.
776 * We set the XFS_BLF_CANCEL flag in the buf log format structure
777 * and log the buf item. This will be used at recovery time
778 * to determine that copies of the buffer in the log before
779 * this should not be replayed.
780 * We mark the item descriptor and the transaction dirty so
781 * that we'll hold the buffer until after the commit.
783 * Since we're invalidating the buffer, we also clear the state
784 * about which parts of the buffer have been logged. We also
785 * clear the flag indicating that this is an inode buffer since
786 * the data in the buffer will no longer be valid.
788 * We set the stale bit in the buffer as well since we're getting
791 XFS_BUF_UNDELAYWRITE(bp
);
793 bip
->bli_flags
|= XFS_BLI_STALE
;
794 bip
->bli_flags
&= ~(XFS_BLI_INODE_BUF
| XFS_BLI_LOGGED
| XFS_BLI_DIRTY
);
795 bip
->bli_format
.blf_flags
&= ~XFS_BLF_INODE_BUF
;
796 bip
->bli_format
.blf_flags
|= XFS_BLF_CANCEL
;
797 memset((char *)(bip
->bli_format
.blf_data_map
), 0,
798 (bip
->bli_format
.blf_map_size
* sizeof(uint
)));
799 lidp
->lid_flags
|= XFS_LID_DIRTY
;
800 tp
->t_flags
|= XFS_TRANS_DIRTY
;
804 * This call is used to indicate that the buffer contains on-disk inodes which
805 * must be handled specially during recovery. They require special handling
806 * because only the di_next_unlinked from the inodes in the buffer should be
807 * recovered. The rest of the data in the buffer is logged via the inodes
810 * All we do is set the XFS_BLI_INODE_BUF flag in the items flags so it can be
811 * transferred to the buffer's log format structure so that we'll know what to
812 * do at recovery time.
819 xfs_buf_log_item_t
*bip
;
821 ASSERT(XFS_BUF_ISBUSY(bp
));
822 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
823 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
825 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
826 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
828 bip
->bli_flags
|= XFS_BLI_INODE_BUF
;
832 * This call is used to indicate that the buffer is going to
833 * be staled and was an inode buffer. This means it gets
834 * special processing during unpin - where any inodes
835 * associated with the buffer should be removed from ail.
836 * There is also special processing during recovery,
837 * any replay of the inodes in the buffer needs to be
838 * prevented as the buffer may have been reused.
841 xfs_trans_stale_inode_buf(
845 xfs_buf_log_item_t
*bip
;
847 ASSERT(XFS_BUF_ISBUSY(bp
));
848 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
849 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
851 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
852 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
854 bip
->bli_flags
|= XFS_BLI_STALE_INODE
;
855 bip
->bli_item
.li_cb
= (void(*)(xfs_buf_t
*,xfs_log_item_t
*))
862 * Mark the buffer as being one which contains newly allocated
863 * inodes. We need to make sure that even if this buffer is
864 * relogged as an 'inode buf' we still recover all of the inode
865 * images in the face of a crash. This works in coordination with
866 * xfs_buf_item_committed() to ensure that the buffer remains in the
867 * AIL at its original location even after it has been relogged.
871 xfs_trans_inode_alloc_buf(
875 xfs_buf_log_item_t
*bip
;
877 ASSERT(XFS_BUF_ISBUSY(bp
));
878 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
879 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
881 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
882 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
884 bip
->bli_flags
|= XFS_BLI_INODE_ALLOC_BUF
;
889 * Similar to xfs_trans_inode_buf(), this marks the buffer as a cluster of
890 * dquots. However, unlike in inode buffer recovery, dquot buffers get
891 * recovered in their entirety. (Hence, no XFS_BLI_DQUOT_ALLOC_BUF flag).
892 * The only thing that makes dquot buffers different from regular
893 * buffers is that we must not replay dquot bufs when recovering
894 * if a _corresponding_ quotaoff has happened. We also have to distinguish
895 * between usr dquot bufs and grp dquot bufs, because usr and grp quotas
896 * can be turned off independently.
905 xfs_buf_log_item_t
*bip
;
907 ASSERT(XFS_BUF_ISBUSY(bp
));
908 ASSERT(XFS_BUF_FSPRIVATE2(bp
, xfs_trans_t
*) == tp
);
909 ASSERT(XFS_BUF_FSPRIVATE(bp
, void *) != NULL
);
910 ASSERT(type
== XFS_BLF_UDQUOT_BUF
||
911 type
== XFS_BLF_PDQUOT_BUF
||
912 type
== XFS_BLF_GDQUOT_BUF
);
914 bip
= XFS_BUF_FSPRIVATE(bp
, xfs_buf_log_item_t
*);
915 ASSERT(atomic_read(&bip
->bli_refcount
) > 0);
917 bip
->bli_format
.blf_flags
|= type
;
This page took 0.049812 seconds and 5 git commands to generate.