2 * Copyright (c) 2000-2006 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
18 #include <linux/log2.h>
22 #include "xfs_types.h"
25 #include "xfs_trans.h"
26 #include "xfs_trans_priv.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.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_inode_item.h"
38 #include "xfs_btree.h"
39 #include "xfs_alloc.h"
40 #include "xfs_ialloc.h"
42 #include "xfs_error.h"
43 #include "xfs_utils.h"
44 #include "xfs_quota.h"
45 #include "xfs_filestream.h"
46 #include "xfs_vnodeops.h"
47 #include "xfs_trace.h"
48 #include "xfs_icache.h"
50 kmem_zone_t
*xfs_ifork_zone
;
51 kmem_zone_t
*xfs_inode_zone
;
54 * Used in xfs_itruncate_extents(). This is the maximum number of extents
55 * freed from a file in a single transaction.
57 #define XFS_ITRUNC_MAX_EXTENTS 2
59 STATIC
int xfs_iflush_int(xfs_inode_t
*, xfs_buf_t
*);
60 STATIC
int xfs_iformat_local(xfs_inode_t
*, xfs_dinode_t
*, int, int);
61 STATIC
int xfs_iformat_extents(xfs_inode_t
*, xfs_dinode_t
*, int);
62 STATIC
int xfs_iformat_btree(xfs_inode_t
*, xfs_dinode_t
*, int);
65 * helper function to extract extent size hint from inode
71 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_EXTSIZE
) && ip
->i_d
.di_extsize
)
72 return ip
->i_d
.di_extsize
;
73 if (XFS_IS_REALTIME_INODE(ip
))
74 return ip
->i_mount
->m_sb
.sb_rextsize
;
79 * This is a wrapper routine around the xfs_ilock() routine used to centralize
80 * some grungy code. It is used in places that wish to lock the inode solely
81 * for reading the extents. The reason these places can't just call
82 * xfs_ilock(SHARED) is that the inode lock also guards to bringing in of the
83 * extents from disk for a file in b-tree format. If the inode is in b-tree
84 * format, then we need to lock the inode exclusively until the extents are read
85 * in. Locking it exclusively all the time would limit our parallelism
86 * unnecessarily, though. What we do instead is check to see if the extents
87 * have been read in yet, and only lock the inode exclusively if they have not.
89 * The function returns a value which should be given to the corresponding
90 * xfs_iunlock_map_shared(). This value is the mode in which the lock was
99 if ((ip
->i_d
.di_format
== XFS_DINODE_FMT_BTREE
) &&
100 ((ip
->i_df
.if_flags
& XFS_IFEXTENTS
) == 0)) {
101 lock_mode
= XFS_ILOCK_EXCL
;
103 lock_mode
= XFS_ILOCK_SHARED
;
106 xfs_ilock(ip
, lock_mode
);
112 * This is simply the unlock routine to go with xfs_ilock_map_shared().
113 * All it does is call xfs_iunlock() with the given lock_mode.
116 xfs_iunlock_map_shared(
118 unsigned int lock_mode
)
120 xfs_iunlock(ip
, lock_mode
);
124 * The xfs inode contains 2 locks: a multi-reader lock called the
125 * i_iolock and a multi-reader lock called the i_lock. This routine
126 * allows either or both of the locks to be obtained.
128 * The 2 locks should always be ordered so that the IO lock is
129 * obtained first in order to prevent deadlock.
131 * ip -- the inode being locked
132 * lock_flags -- this parameter indicates the inode's locks
133 * to be locked. It can be:
138 * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
139 * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
140 * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
141 * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
148 trace_xfs_ilock(ip
, lock_flags
, _RET_IP_
);
151 * You can't set both SHARED and EXCL for the same lock,
152 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
153 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
155 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
156 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
157 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
158 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
159 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_LOCK_DEP_MASK
)) == 0);
161 if (lock_flags
& XFS_IOLOCK_EXCL
)
162 mrupdate_nested(&ip
->i_iolock
, XFS_IOLOCK_DEP(lock_flags
));
163 else if (lock_flags
& XFS_IOLOCK_SHARED
)
164 mraccess_nested(&ip
->i_iolock
, XFS_IOLOCK_DEP(lock_flags
));
166 if (lock_flags
& XFS_ILOCK_EXCL
)
167 mrupdate_nested(&ip
->i_lock
, XFS_ILOCK_DEP(lock_flags
));
168 else if (lock_flags
& XFS_ILOCK_SHARED
)
169 mraccess_nested(&ip
->i_lock
, XFS_ILOCK_DEP(lock_flags
));
173 * This is just like xfs_ilock(), except that the caller
174 * is guaranteed not to sleep. It returns 1 if it gets
175 * the requested locks and 0 otherwise. If the IO lock is
176 * obtained but the inode lock cannot be, then the IO lock
177 * is dropped before returning.
179 * ip -- the inode being locked
180 * lock_flags -- this parameter indicates the inode's locks to be
181 * to be locked. See the comment for xfs_ilock() for a list
189 trace_xfs_ilock_nowait(ip
, lock_flags
, _RET_IP_
);
192 * You can't set both SHARED and EXCL for the same lock,
193 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
194 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
196 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
197 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
198 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
199 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
200 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_LOCK_DEP_MASK
)) == 0);
202 if (lock_flags
& XFS_IOLOCK_EXCL
) {
203 if (!mrtryupdate(&ip
->i_iolock
))
205 } else if (lock_flags
& XFS_IOLOCK_SHARED
) {
206 if (!mrtryaccess(&ip
->i_iolock
))
209 if (lock_flags
& XFS_ILOCK_EXCL
) {
210 if (!mrtryupdate(&ip
->i_lock
))
211 goto out_undo_iolock
;
212 } else if (lock_flags
& XFS_ILOCK_SHARED
) {
213 if (!mrtryaccess(&ip
->i_lock
))
214 goto out_undo_iolock
;
219 if (lock_flags
& XFS_IOLOCK_EXCL
)
220 mrunlock_excl(&ip
->i_iolock
);
221 else if (lock_flags
& XFS_IOLOCK_SHARED
)
222 mrunlock_shared(&ip
->i_iolock
);
228 * xfs_iunlock() is used to drop the inode locks acquired with
229 * xfs_ilock() and xfs_ilock_nowait(). The caller must pass
230 * in the flags given to xfs_ilock() or xfs_ilock_nowait() so
231 * that we know which locks to drop.
233 * ip -- the inode being unlocked
234 * lock_flags -- this parameter indicates the inode's locks to be
235 * to be unlocked. See the comment for xfs_ilock() for a list
236 * of valid values for this parameter.
245 * You can't set both SHARED and EXCL for the same lock,
246 * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
247 * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
249 ASSERT((lock_flags
& (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
)) !=
250 (XFS_IOLOCK_SHARED
| XFS_IOLOCK_EXCL
));
251 ASSERT((lock_flags
& (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
)) !=
252 (XFS_ILOCK_SHARED
| XFS_ILOCK_EXCL
));
253 ASSERT((lock_flags
& ~(XFS_LOCK_MASK
| XFS_LOCK_DEP_MASK
)) == 0);
254 ASSERT(lock_flags
!= 0);
256 if (lock_flags
& XFS_IOLOCK_EXCL
)
257 mrunlock_excl(&ip
->i_iolock
);
258 else if (lock_flags
& XFS_IOLOCK_SHARED
)
259 mrunlock_shared(&ip
->i_iolock
);
261 if (lock_flags
& XFS_ILOCK_EXCL
)
262 mrunlock_excl(&ip
->i_lock
);
263 else if (lock_flags
& XFS_ILOCK_SHARED
)
264 mrunlock_shared(&ip
->i_lock
);
266 trace_xfs_iunlock(ip
, lock_flags
, _RET_IP_
);
270 * give up write locks. the i/o lock cannot be held nested
271 * if it is being demoted.
278 ASSERT(lock_flags
& (XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
));
279 ASSERT((lock_flags
& ~(XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
)) == 0);
281 if (lock_flags
& XFS_ILOCK_EXCL
)
282 mrdemote(&ip
->i_lock
);
283 if (lock_flags
& XFS_IOLOCK_EXCL
)
284 mrdemote(&ip
->i_iolock
);
286 trace_xfs_ilock_demote(ip
, lock_flags
, _RET_IP_
);
295 if (lock_flags
& (XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
)) {
296 if (!(lock_flags
& XFS_ILOCK_SHARED
))
297 return !!ip
->i_lock
.mr_writer
;
298 return rwsem_is_locked(&ip
->i_lock
.mr_lock
);
301 if (lock_flags
& (XFS_IOLOCK_EXCL
|XFS_IOLOCK_SHARED
)) {
302 if (!(lock_flags
& XFS_IOLOCK_SHARED
))
303 return !!ip
->i_iolock
.mr_writer
;
304 return rwsem_is_locked(&ip
->i_iolock
.mr_lock
);
314 struct xfs_inode
*ip
)
316 wait_queue_head_t
*wq
= bit_waitqueue(&ip
->i_flags
, __XFS_IFLOCK_BIT
);
317 DEFINE_WAIT_BIT(wait
, &ip
->i_flags
, __XFS_IFLOCK_BIT
);
320 prepare_to_wait_exclusive(wq
, &wait
.wait
, TASK_UNINTERRUPTIBLE
);
321 if (xfs_isiflocked(ip
))
323 } while (!xfs_iflock_nowait(ip
));
325 finish_wait(wq
, &wait
.wait
);
330 * Make sure that the extents in the given memory buffer
334 xfs_validate_extents(
339 xfs_bmbt_irec_t irec
;
340 xfs_bmbt_rec_host_t rec
;
343 for (i
= 0; i
< nrecs
; i
++) {
344 xfs_bmbt_rec_host_t
*ep
= xfs_iext_get_ext(ifp
, i
);
345 rec
.l0
= get_unaligned(&ep
->l0
);
346 rec
.l1
= get_unaligned(&ep
->l1
);
347 xfs_bmbt_get_all(&rec
, &irec
);
348 if (fmt
== XFS_EXTFMT_NOSTATE
)
349 ASSERT(irec
.br_state
== XFS_EXT_NORM
);
353 #define xfs_validate_extents(ifp, nrecs, fmt)
357 * Check that none of the inode's in the buffer have a next
358 * unlinked field of 0.
370 j
= mp
->m_inode_cluster_size
>> mp
->m_sb
.sb_inodelog
;
372 for (i
= 0; i
< j
; i
++) {
373 dip
= (xfs_dinode_t
*)xfs_buf_offset(bp
,
374 i
* mp
->m_sb
.sb_inodesize
);
375 if (!dip
->di_next_unlinked
) {
377 "Detected bogus zero next_unlinked field in incore inode buffer 0x%p.",
379 ASSERT(dip
->di_next_unlinked
);
386 xfs_inode_buf_verify(
389 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
394 * Validate the magic number and version of every inode in the buffer
396 ni
= XFS_BB_TO_FSB(mp
, bp
->b_length
) * mp
->m_sb
.sb_inopblock
;
397 for (i
= 0; i
< ni
; i
++) {
401 dip
= (struct xfs_dinode
*)xfs_buf_offset(bp
,
402 (i
<< mp
->m_sb
.sb_inodelog
));
403 di_ok
= dip
->di_magic
== cpu_to_be16(XFS_DINODE_MAGIC
) &&
404 XFS_DINODE_GOOD_VERSION(dip
->di_version
);
405 if (unlikely(XFS_TEST_ERROR(!di_ok
, mp
,
406 XFS_ERRTAG_ITOBP_INOTOBP
,
407 XFS_RANDOM_ITOBP_INOTOBP
))) {
408 xfs_buf_ioerror(bp
, EFSCORRUPTED
);
409 XFS_CORRUPTION_ERROR(__func__
, XFS_ERRLEVEL_HIGH
,
413 "bad inode magic/vsn daddr %lld #%d (magic=%x)",
414 (unsigned long long)bp
->b_bn
, i
,
415 be16_to_cpu(dip
->di_magic
));
420 xfs_inobp_check(mp
, bp
);
425 xfs_inode_buf_read_verify(
428 xfs_inode_buf_verify(bp
);
432 xfs_inode_buf_write_verify(
435 xfs_inode_buf_verify(bp
);
438 const struct xfs_buf_ops xfs_inode_buf_ops
= {
439 .verify_read
= xfs_inode_buf_read_verify
,
440 .verify_write
= xfs_inode_buf_write_verify
,
445 * This routine is called to map an inode to the buffer containing the on-disk
446 * version of the inode. It returns a pointer to the buffer containing the
447 * on-disk inode in the bpp parameter, and in the dipp parameter it returns a
448 * pointer to the on-disk inode within that buffer.
450 * If a non-zero error is returned, then the contents of bpp and dipp are
455 struct xfs_mount
*mp
,
456 struct xfs_trans
*tp
,
457 struct xfs_imap
*imap
,
458 struct xfs_dinode
**dipp
,
459 struct xfs_buf
**bpp
,
466 buf_flags
|= XBF_UNMAPPED
;
467 error
= xfs_trans_read_buf(mp
, tp
, mp
->m_ddev_targp
, imap
->im_blkno
,
468 (int)imap
->im_len
, buf_flags
, &bp
,
471 if (error
== EAGAIN
) {
472 ASSERT(buf_flags
& XBF_TRYLOCK
);
476 if (error
== EFSCORRUPTED
&&
477 (iget_flags
& XFS_IGET_UNTRUSTED
))
478 return XFS_ERROR(EINVAL
);
480 xfs_warn(mp
, "%s: xfs_trans_read_buf() returned error %d.",
486 *dipp
= (struct xfs_dinode
*)xfs_buf_offset(bp
, imap
->im_boffset
);
491 * Move inode type and inode format specific information from the
492 * on-disk inode to the in-core inode. For fifos, devs, and sockets
493 * this means set if_rdev to the proper value. For files, directories,
494 * and symlinks this means to bring in the in-line data or extent
495 * pointers. For a file in B-tree format, only the root is immediately
496 * brought in-core. The rest will be in-lined in if_extents when it
497 * is first referenced (see xfs_iread_extents()).
504 xfs_attr_shortform_t
*atp
;
509 if (unlikely(be32_to_cpu(dip
->di_nextents
) +
510 be16_to_cpu(dip
->di_anextents
) >
511 be64_to_cpu(dip
->di_nblocks
))) {
512 xfs_warn(ip
->i_mount
,
513 "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.",
514 (unsigned long long)ip
->i_ino
,
515 (int)(be32_to_cpu(dip
->di_nextents
) +
516 be16_to_cpu(dip
->di_anextents
)),
518 be64_to_cpu(dip
->di_nblocks
));
519 XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW
,
521 return XFS_ERROR(EFSCORRUPTED
);
524 if (unlikely(dip
->di_forkoff
> ip
->i_mount
->m_sb
.sb_inodesize
)) {
525 xfs_warn(ip
->i_mount
, "corrupt dinode %Lu, forkoff = 0x%x.",
526 (unsigned long long)ip
->i_ino
,
528 XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW
,
530 return XFS_ERROR(EFSCORRUPTED
);
533 if (unlikely((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) &&
534 !ip
->i_mount
->m_rtdev_targp
)) {
535 xfs_warn(ip
->i_mount
,
536 "corrupt dinode %Lu, has realtime flag set.",
538 XFS_CORRUPTION_ERROR("xfs_iformat(realtime)",
539 XFS_ERRLEVEL_LOW
, ip
->i_mount
, dip
);
540 return XFS_ERROR(EFSCORRUPTED
);
543 switch (ip
->i_d
.di_mode
& S_IFMT
) {
548 if (unlikely(dip
->di_format
!= XFS_DINODE_FMT_DEV
)) {
549 XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW
,
551 return XFS_ERROR(EFSCORRUPTED
);
554 ip
->i_df
.if_u2
.if_rdev
= xfs_dinode_get_rdev(dip
);
560 switch (dip
->di_format
) {
561 case XFS_DINODE_FMT_LOCAL
:
563 * no local regular files yet
565 if (unlikely(S_ISREG(be16_to_cpu(dip
->di_mode
)))) {
566 xfs_warn(ip
->i_mount
,
567 "corrupt inode %Lu (local format for regular file).",
568 (unsigned long long) ip
->i_ino
);
569 XFS_CORRUPTION_ERROR("xfs_iformat(4)",
572 return XFS_ERROR(EFSCORRUPTED
);
575 di_size
= be64_to_cpu(dip
->di_size
);
576 if (unlikely(di_size
> XFS_DFORK_DSIZE(dip
, ip
->i_mount
))) {
577 xfs_warn(ip
->i_mount
,
578 "corrupt inode %Lu (bad size %Ld for local inode).",
579 (unsigned long long) ip
->i_ino
,
580 (long long) di_size
);
581 XFS_CORRUPTION_ERROR("xfs_iformat(5)",
584 return XFS_ERROR(EFSCORRUPTED
);
588 error
= xfs_iformat_local(ip
, dip
, XFS_DATA_FORK
, size
);
590 case XFS_DINODE_FMT_EXTENTS
:
591 error
= xfs_iformat_extents(ip
, dip
, XFS_DATA_FORK
);
593 case XFS_DINODE_FMT_BTREE
:
594 error
= xfs_iformat_btree(ip
, dip
, XFS_DATA_FORK
);
597 XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW
,
599 return XFS_ERROR(EFSCORRUPTED
);
604 XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW
, ip
->i_mount
);
605 return XFS_ERROR(EFSCORRUPTED
);
610 if (!XFS_DFORK_Q(dip
))
613 ASSERT(ip
->i_afp
== NULL
);
614 ip
->i_afp
= kmem_zone_zalloc(xfs_ifork_zone
, KM_SLEEP
| KM_NOFS
);
616 switch (dip
->di_aformat
) {
617 case XFS_DINODE_FMT_LOCAL
:
618 atp
= (xfs_attr_shortform_t
*)XFS_DFORK_APTR(dip
);
619 size
= be16_to_cpu(atp
->hdr
.totsize
);
621 if (unlikely(size
< sizeof(struct xfs_attr_sf_hdr
))) {
622 xfs_warn(ip
->i_mount
,
623 "corrupt inode %Lu (bad attr fork size %Ld).",
624 (unsigned long long) ip
->i_ino
,
626 XFS_CORRUPTION_ERROR("xfs_iformat(8)",
629 return XFS_ERROR(EFSCORRUPTED
);
632 error
= xfs_iformat_local(ip
, dip
, XFS_ATTR_FORK
, size
);
634 case XFS_DINODE_FMT_EXTENTS
:
635 error
= xfs_iformat_extents(ip
, dip
, XFS_ATTR_FORK
);
637 case XFS_DINODE_FMT_BTREE
:
638 error
= xfs_iformat_btree(ip
, dip
, XFS_ATTR_FORK
);
641 error
= XFS_ERROR(EFSCORRUPTED
);
645 kmem_zone_free(xfs_ifork_zone
, ip
->i_afp
);
647 xfs_idestroy_fork(ip
, XFS_DATA_FORK
);
653 * The file is in-lined in the on-disk inode.
654 * If it fits into if_inline_data, then copy
655 * it there, otherwise allocate a buffer for it
656 * and copy the data there. Either way, set
657 * if_data to point at the data.
658 * If we allocate a buffer for the data, make
659 * sure that its size is a multiple of 4 and
660 * record the real size in i_real_bytes.
673 * If the size is unreasonable, then something
674 * is wrong and we just bail out rather than crash in
675 * kmem_alloc() or memcpy() below.
677 if (unlikely(size
> XFS_DFORK_SIZE(dip
, ip
->i_mount
, whichfork
))) {
678 xfs_warn(ip
->i_mount
,
679 "corrupt inode %Lu (bad size %d for local fork, size = %d).",
680 (unsigned long long) ip
->i_ino
, size
,
681 XFS_DFORK_SIZE(dip
, ip
->i_mount
, whichfork
));
682 XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW
,
684 return XFS_ERROR(EFSCORRUPTED
);
686 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
689 ifp
->if_u1
.if_data
= NULL
;
690 else if (size
<= sizeof(ifp
->if_u2
.if_inline_data
))
691 ifp
->if_u1
.if_data
= ifp
->if_u2
.if_inline_data
;
693 real_size
= roundup(size
, 4);
694 ifp
->if_u1
.if_data
= kmem_alloc(real_size
, KM_SLEEP
| KM_NOFS
);
696 ifp
->if_bytes
= size
;
697 ifp
->if_real_bytes
= real_size
;
699 memcpy(ifp
->if_u1
.if_data
, XFS_DFORK_PTR(dip
, whichfork
), size
);
700 ifp
->if_flags
&= ~XFS_IFEXTENTS
;
701 ifp
->if_flags
|= XFS_IFINLINE
;
706 * The file consists of a set of extents all
707 * of which fit into the on-disk inode.
708 * If there are few enough extents to fit into
709 * the if_inline_ext, then copy them there.
710 * Otherwise allocate a buffer for them and copy
711 * them into it. Either way, set if_extents
712 * to point at the extents.
726 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
727 nex
= XFS_DFORK_NEXTENTS(dip
, whichfork
);
728 size
= nex
* (uint
)sizeof(xfs_bmbt_rec_t
);
731 * If the number of extents is unreasonable, then something
732 * is wrong and we just bail out rather than crash in
733 * kmem_alloc() or memcpy() below.
735 if (unlikely(size
< 0 || size
> XFS_DFORK_SIZE(dip
, ip
->i_mount
, whichfork
))) {
736 xfs_warn(ip
->i_mount
, "corrupt inode %Lu ((a)extents = %d).",
737 (unsigned long long) ip
->i_ino
, nex
);
738 XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW
,
740 return XFS_ERROR(EFSCORRUPTED
);
743 ifp
->if_real_bytes
= 0;
745 ifp
->if_u1
.if_extents
= NULL
;
746 else if (nex
<= XFS_INLINE_EXTS
)
747 ifp
->if_u1
.if_extents
= ifp
->if_u2
.if_inline_ext
;
749 xfs_iext_add(ifp
, 0, nex
);
751 ifp
->if_bytes
= size
;
753 dp
= (xfs_bmbt_rec_t
*) XFS_DFORK_PTR(dip
, whichfork
);
754 xfs_validate_extents(ifp
, nex
, XFS_EXTFMT_INODE(ip
));
755 for (i
= 0; i
< nex
; i
++, dp
++) {
756 xfs_bmbt_rec_host_t
*ep
= xfs_iext_get_ext(ifp
, i
);
757 ep
->l0
= get_unaligned_be64(&dp
->l0
);
758 ep
->l1
= get_unaligned_be64(&dp
->l1
);
760 XFS_BMAP_TRACE_EXLIST(ip
, nex
, whichfork
);
761 if (whichfork
!= XFS_DATA_FORK
||
762 XFS_EXTFMT_INODE(ip
) == XFS_EXTFMT_NOSTATE
)
763 if (unlikely(xfs_check_nostate_extents(
765 XFS_ERROR_REPORT("xfs_iformat_extents(2)",
768 return XFS_ERROR(EFSCORRUPTED
);
771 ifp
->if_flags
|= XFS_IFEXTENTS
;
776 * The file has too many extents to fit into
777 * the inode, so they are in B-tree format.
778 * Allocate a buffer for the root of the B-tree
779 * and copy the root into it. The i_extents
780 * field will remain NULL until all of the
781 * extents are read in (when they are needed).
789 xfs_bmdr_block_t
*dfp
;
795 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
796 dfp
= (xfs_bmdr_block_t
*)XFS_DFORK_PTR(dip
, whichfork
);
797 size
= XFS_BMAP_BROOT_SPACE(dfp
);
798 nrecs
= be16_to_cpu(dfp
->bb_numrecs
);
801 * blow out if -- fork has less extents than can fit in
802 * fork (fork shouldn't be a btree format), root btree
803 * block has more records than can fit into the fork,
804 * or the number of extents is greater than the number of
807 if (unlikely(XFS_IFORK_NEXTENTS(ip
, whichfork
) <=
808 XFS_IFORK_MAXEXT(ip
, whichfork
) ||
809 XFS_BMDR_SPACE_CALC(nrecs
) >
810 XFS_DFORK_SIZE(dip
, ip
->i_mount
, whichfork
) ||
811 XFS_IFORK_NEXTENTS(ip
, whichfork
) > ip
->i_d
.di_nblocks
)) {
812 xfs_warn(ip
->i_mount
, "corrupt inode %Lu (btree).",
813 (unsigned long long) ip
->i_ino
);
814 XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW
,
816 return XFS_ERROR(EFSCORRUPTED
);
819 ifp
->if_broot_bytes
= size
;
820 ifp
->if_broot
= kmem_alloc(size
, KM_SLEEP
| KM_NOFS
);
821 ASSERT(ifp
->if_broot
!= NULL
);
823 * Copy and convert from the on-disk structure
824 * to the in-memory structure.
826 xfs_bmdr_to_bmbt(ip
->i_mount
, dfp
,
827 XFS_DFORK_SIZE(dip
, ip
->i_mount
, whichfork
),
828 ifp
->if_broot
, size
);
829 ifp
->if_flags
&= ~XFS_IFEXTENTS
;
830 ifp
->if_flags
|= XFS_IFBROOT
;
836 xfs_dinode_from_disk(
840 to
->di_magic
= be16_to_cpu(from
->di_magic
);
841 to
->di_mode
= be16_to_cpu(from
->di_mode
);
842 to
->di_version
= from
->di_version
;
843 to
->di_format
= from
->di_format
;
844 to
->di_onlink
= be16_to_cpu(from
->di_onlink
);
845 to
->di_uid
= be32_to_cpu(from
->di_uid
);
846 to
->di_gid
= be32_to_cpu(from
->di_gid
);
847 to
->di_nlink
= be32_to_cpu(from
->di_nlink
);
848 to
->di_projid_lo
= be16_to_cpu(from
->di_projid_lo
);
849 to
->di_projid_hi
= be16_to_cpu(from
->di_projid_hi
);
850 memcpy(to
->di_pad
, from
->di_pad
, sizeof(to
->di_pad
));
851 to
->di_flushiter
= be16_to_cpu(from
->di_flushiter
);
852 to
->di_atime
.t_sec
= be32_to_cpu(from
->di_atime
.t_sec
);
853 to
->di_atime
.t_nsec
= be32_to_cpu(from
->di_atime
.t_nsec
);
854 to
->di_mtime
.t_sec
= be32_to_cpu(from
->di_mtime
.t_sec
);
855 to
->di_mtime
.t_nsec
= be32_to_cpu(from
->di_mtime
.t_nsec
);
856 to
->di_ctime
.t_sec
= be32_to_cpu(from
->di_ctime
.t_sec
);
857 to
->di_ctime
.t_nsec
= be32_to_cpu(from
->di_ctime
.t_nsec
);
858 to
->di_size
= be64_to_cpu(from
->di_size
);
859 to
->di_nblocks
= be64_to_cpu(from
->di_nblocks
);
860 to
->di_extsize
= be32_to_cpu(from
->di_extsize
);
861 to
->di_nextents
= be32_to_cpu(from
->di_nextents
);
862 to
->di_anextents
= be16_to_cpu(from
->di_anextents
);
863 to
->di_forkoff
= from
->di_forkoff
;
864 to
->di_aformat
= from
->di_aformat
;
865 to
->di_dmevmask
= be32_to_cpu(from
->di_dmevmask
);
866 to
->di_dmstate
= be16_to_cpu(from
->di_dmstate
);
867 to
->di_flags
= be16_to_cpu(from
->di_flags
);
868 to
->di_gen
= be32_to_cpu(from
->di_gen
);
874 xfs_icdinode_t
*from
)
876 to
->di_magic
= cpu_to_be16(from
->di_magic
);
877 to
->di_mode
= cpu_to_be16(from
->di_mode
);
878 to
->di_version
= from
->di_version
;
879 to
->di_format
= from
->di_format
;
880 to
->di_onlink
= cpu_to_be16(from
->di_onlink
);
881 to
->di_uid
= cpu_to_be32(from
->di_uid
);
882 to
->di_gid
= cpu_to_be32(from
->di_gid
);
883 to
->di_nlink
= cpu_to_be32(from
->di_nlink
);
884 to
->di_projid_lo
= cpu_to_be16(from
->di_projid_lo
);
885 to
->di_projid_hi
= cpu_to_be16(from
->di_projid_hi
);
886 memcpy(to
->di_pad
, from
->di_pad
, sizeof(to
->di_pad
));
887 to
->di_flushiter
= cpu_to_be16(from
->di_flushiter
);
888 to
->di_atime
.t_sec
= cpu_to_be32(from
->di_atime
.t_sec
);
889 to
->di_atime
.t_nsec
= cpu_to_be32(from
->di_atime
.t_nsec
);
890 to
->di_mtime
.t_sec
= cpu_to_be32(from
->di_mtime
.t_sec
);
891 to
->di_mtime
.t_nsec
= cpu_to_be32(from
->di_mtime
.t_nsec
);
892 to
->di_ctime
.t_sec
= cpu_to_be32(from
->di_ctime
.t_sec
);
893 to
->di_ctime
.t_nsec
= cpu_to_be32(from
->di_ctime
.t_nsec
);
894 to
->di_size
= cpu_to_be64(from
->di_size
);
895 to
->di_nblocks
= cpu_to_be64(from
->di_nblocks
);
896 to
->di_extsize
= cpu_to_be32(from
->di_extsize
);
897 to
->di_nextents
= cpu_to_be32(from
->di_nextents
);
898 to
->di_anextents
= cpu_to_be16(from
->di_anextents
);
899 to
->di_forkoff
= from
->di_forkoff
;
900 to
->di_aformat
= from
->di_aformat
;
901 to
->di_dmevmask
= cpu_to_be32(from
->di_dmevmask
);
902 to
->di_dmstate
= cpu_to_be16(from
->di_dmstate
);
903 to
->di_flags
= cpu_to_be16(from
->di_flags
);
904 to
->di_gen
= cpu_to_be32(from
->di_gen
);
913 if (di_flags
& XFS_DIFLAG_ANY
) {
914 if (di_flags
& XFS_DIFLAG_REALTIME
)
915 flags
|= XFS_XFLAG_REALTIME
;
916 if (di_flags
& XFS_DIFLAG_PREALLOC
)
917 flags
|= XFS_XFLAG_PREALLOC
;
918 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
919 flags
|= XFS_XFLAG_IMMUTABLE
;
920 if (di_flags
& XFS_DIFLAG_APPEND
)
921 flags
|= XFS_XFLAG_APPEND
;
922 if (di_flags
& XFS_DIFLAG_SYNC
)
923 flags
|= XFS_XFLAG_SYNC
;
924 if (di_flags
& XFS_DIFLAG_NOATIME
)
925 flags
|= XFS_XFLAG_NOATIME
;
926 if (di_flags
& XFS_DIFLAG_NODUMP
)
927 flags
|= XFS_XFLAG_NODUMP
;
928 if (di_flags
& XFS_DIFLAG_RTINHERIT
)
929 flags
|= XFS_XFLAG_RTINHERIT
;
930 if (di_flags
& XFS_DIFLAG_PROJINHERIT
)
931 flags
|= XFS_XFLAG_PROJINHERIT
;
932 if (di_flags
& XFS_DIFLAG_NOSYMLINKS
)
933 flags
|= XFS_XFLAG_NOSYMLINKS
;
934 if (di_flags
& XFS_DIFLAG_EXTSIZE
)
935 flags
|= XFS_XFLAG_EXTSIZE
;
936 if (di_flags
& XFS_DIFLAG_EXTSZINHERIT
)
937 flags
|= XFS_XFLAG_EXTSZINHERIT
;
938 if (di_flags
& XFS_DIFLAG_NODEFRAG
)
939 flags
|= XFS_XFLAG_NODEFRAG
;
940 if (di_flags
& XFS_DIFLAG_FILESTREAM
)
941 flags
|= XFS_XFLAG_FILESTREAM
;
951 xfs_icdinode_t
*dic
= &ip
->i_d
;
953 return _xfs_dic2xflags(dic
->di_flags
) |
954 (XFS_IFORK_Q(ip
) ? XFS_XFLAG_HASATTR
: 0);
961 return _xfs_dic2xflags(be16_to_cpu(dip
->di_flags
)) |
962 (XFS_DFORK_Q(dip
) ? XFS_XFLAG_HASATTR
: 0);
966 * Read the disk inode attributes into the in-core inode structure.
980 * Fill in the location information in the in-core inode.
982 error
= xfs_imap(mp
, tp
, ip
->i_ino
, &ip
->i_imap
, iget_flags
);
987 * Get pointers to the on-disk inode and the buffer containing it.
989 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &bp
, 0, iget_flags
);
994 * If we got something that isn't an inode it means someone
995 * (nfs or dmi) has a stale handle.
997 if (dip
->di_magic
!= cpu_to_be16(XFS_DINODE_MAGIC
)) {
1000 "%s: dip->di_magic (0x%x) != XFS_DINODE_MAGIC (0x%x)",
1001 __func__
, be16_to_cpu(dip
->di_magic
), XFS_DINODE_MAGIC
);
1003 error
= XFS_ERROR(EINVAL
);
1008 * If the on-disk inode is already linked to a directory
1009 * entry, copy all of the inode into the in-core inode.
1010 * xfs_iformat() handles copying in the inode format
1011 * specific information.
1012 * Otherwise, just get the truly permanent information.
1015 xfs_dinode_from_disk(&ip
->i_d
, dip
);
1016 error
= xfs_iformat(ip
, dip
);
1019 xfs_alert(mp
, "%s: xfs_iformat() returned error %d",
1025 ip
->i_d
.di_magic
= be16_to_cpu(dip
->di_magic
);
1026 ip
->i_d
.di_version
= dip
->di_version
;
1027 ip
->i_d
.di_gen
= be32_to_cpu(dip
->di_gen
);
1028 ip
->i_d
.di_flushiter
= be16_to_cpu(dip
->di_flushiter
);
1030 * Make sure to pull in the mode here as well in
1031 * case the inode is released without being used.
1032 * This ensures that xfs_inactive() will see that
1033 * the inode is already free and not try to mess
1034 * with the uninitialized part of it.
1036 ip
->i_d
.di_mode
= 0;
1040 * The inode format changed when we moved the link count and
1041 * made it 32 bits long. If this is an old format inode,
1042 * convert it in memory to look like a new one. If it gets
1043 * flushed to disk we will convert back before flushing or
1044 * logging it. We zero out the new projid field and the old link
1045 * count field. We'll handle clearing the pad field (the remains
1046 * of the old uuid field) when we actually convert the inode to
1047 * the new format. We don't change the version number so that we
1048 * can distinguish this from a real new format inode.
1050 if (ip
->i_d
.di_version
== 1) {
1051 ip
->i_d
.di_nlink
= ip
->i_d
.di_onlink
;
1052 ip
->i_d
.di_onlink
= 0;
1053 xfs_set_projid(ip
, 0);
1056 ip
->i_delayed_blks
= 0;
1059 * Mark the buffer containing the inode as something to keep
1060 * around for a while. This helps to keep recently accessed
1061 * meta-data in-core longer.
1063 xfs_buf_set_ref(bp
, XFS_INO_REF
);
1066 * Use xfs_trans_brelse() to release the buffer containing the
1067 * on-disk inode, because it was acquired with xfs_trans_read_buf()
1068 * in xfs_imap_to_bp() above. If tp is NULL, this is just a normal
1069 * brelse(). If we're within a transaction, then xfs_trans_brelse()
1070 * will only release the buffer if it is not dirty within the
1071 * transaction. It will be OK to release the buffer in this case,
1072 * because inodes on disk are never destroyed and we will be
1073 * locking the new in-core inode before putting it in the hash
1074 * table where other processes can find it. Thus we don't have
1075 * to worry about the inode being changed just because we released
1079 xfs_trans_brelse(tp
, bp
);
1084 * Read in extents from a btree-format inode.
1085 * Allocate and fill in if_extents. Real work is done in xfs_bmap.c.
1095 xfs_extnum_t nextents
;
1097 if (unlikely(XFS_IFORK_FORMAT(ip
, whichfork
) != XFS_DINODE_FMT_BTREE
)) {
1098 XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW
,
1100 return XFS_ERROR(EFSCORRUPTED
);
1102 nextents
= XFS_IFORK_NEXTENTS(ip
, whichfork
);
1103 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
1106 * We know that the size is valid (it's checked in iformat_btree)
1108 ifp
->if_bytes
= ifp
->if_real_bytes
= 0;
1109 ifp
->if_flags
|= XFS_IFEXTENTS
;
1110 xfs_iext_add(ifp
, 0, nextents
);
1111 error
= xfs_bmap_read_extents(tp
, ip
, whichfork
);
1113 xfs_iext_destroy(ifp
);
1114 ifp
->if_flags
&= ~XFS_IFEXTENTS
;
1117 xfs_validate_extents(ifp
, nextents
, XFS_EXTFMT_INODE(ip
));
1122 * Allocate an inode on disk and return a copy of its in-core version.
1123 * The in-core inode is locked exclusively. Set mode, nlink, and rdev
1124 * appropriately within the inode. The uid and gid for the inode are
1125 * set according to the contents of the given cred structure.
1127 * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc()
1128 * has a free inode available, call xfs_iget() to obtain the in-core
1129 * version of the allocated inode. Finally, fill in the inode and
1130 * log its initial contents. In this case, ialloc_context would be
1133 * If xfs_dialloc() does not have an available inode, it will replenish
1134 * its supply by doing an allocation. Since we can only do one
1135 * allocation within a transaction without deadlocks, we must commit
1136 * the current transaction before returning the inode itself.
1137 * In this case, therefore, we will set ialloc_context and return.
1138 * The caller should then commit the current transaction, start a new
1139 * transaction, and call xfs_ialloc() again to actually get the inode.
1141 * To ensure that some other process does not grab the inode that
1142 * was allocated during the first call to xfs_ialloc(), this routine
1143 * also returns the [locked] bp pointing to the head of the freelist
1144 * as ialloc_context. The caller should hold this buffer across
1145 * the commit and pass it back into this routine on the second call.
1147 * If we are allocating quota inodes, we do not have a parent inode
1148 * to attach to or associate with (i.e. pip == NULL) because they
1149 * are not linked into the directory structure - they are attached
1150 * directly to the superblock - and so have no parent.
1161 xfs_buf_t
**ialloc_context
,
1169 int filestreams
= 0;
1172 * Call the space management code to pick
1173 * the on-disk inode to be allocated.
1175 error
= xfs_dialloc(tp
, pip
? pip
->i_ino
: 0, mode
, okalloc
,
1176 ialloc_context
, &ino
);
1179 if (*ialloc_context
|| ino
== NULLFSINO
) {
1183 ASSERT(*ialloc_context
== NULL
);
1186 * Get the in-core inode with the lock held exclusively.
1187 * This is because we're setting fields here we need
1188 * to prevent others from looking at until we're done.
1190 error
= xfs_iget(tp
->t_mountp
, tp
, ino
, XFS_IGET_CREATE
,
1191 XFS_ILOCK_EXCL
, &ip
);
1196 ip
->i_d
.di_mode
= mode
;
1197 ip
->i_d
.di_onlink
= 0;
1198 ip
->i_d
.di_nlink
= nlink
;
1199 ASSERT(ip
->i_d
.di_nlink
== nlink
);
1200 ip
->i_d
.di_uid
= current_fsuid();
1201 ip
->i_d
.di_gid
= current_fsgid();
1202 xfs_set_projid(ip
, prid
);
1203 memset(&(ip
->i_d
.di_pad
[0]), 0, sizeof(ip
->i_d
.di_pad
));
1206 * If the superblock version is up to where we support new format
1207 * inodes and this is currently an old format inode, then change
1208 * the inode version number now. This way we only do the conversion
1209 * here rather than here and in the flush/logging code.
1211 if (xfs_sb_version_hasnlink(&tp
->t_mountp
->m_sb
) &&
1212 ip
->i_d
.di_version
== 1) {
1213 ip
->i_d
.di_version
= 2;
1215 * We've already zeroed the old link count, the projid field,
1216 * and the pad field.
1221 * Project ids won't be stored on disk if we are using a version 1 inode.
1223 if ((prid
!= 0) && (ip
->i_d
.di_version
== 1))
1224 xfs_bump_ino_vers2(tp
, ip
);
1226 if (pip
&& XFS_INHERIT_GID(pip
)) {
1227 ip
->i_d
.di_gid
= pip
->i_d
.di_gid
;
1228 if ((pip
->i_d
.di_mode
& S_ISGID
) && S_ISDIR(mode
)) {
1229 ip
->i_d
.di_mode
|= S_ISGID
;
1234 * If the group ID of the new file does not match the effective group
1235 * ID or one of the supplementary group IDs, the S_ISGID bit is cleared
1236 * (and only if the irix_sgid_inherit compatibility variable is set).
1238 if ((irix_sgid_inherit
) &&
1239 (ip
->i_d
.di_mode
& S_ISGID
) &&
1240 (!in_group_p((gid_t
)ip
->i_d
.di_gid
))) {
1241 ip
->i_d
.di_mode
&= ~S_ISGID
;
1244 ip
->i_d
.di_size
= 0;
1245 ip
->i_d
.di_nextents
= 0;
1246 ASSERT(ip
->i_d
.di_nblocks
== 0);
1249 ip
->i_d
.di_mtime
.t_sec
= (__int32_t
)tv
.tv_sec
;
1250 ip
->i_d
.di_mtime
.t_nsec
= (__int32_t
)tv
.tv_nsec
;
1251 ip
->i_d
.di_atime
= ip
->i_d
.di_mtime
;
1252 ip
->i_d
.di_ctime
= ip
->i_d
.di_mtime
;
1255 * di_gen will have been taken care of in xfs_iread.
1257 ip
->i_d
.di_extsize
= 0;
1258 ip
->i_d
.di_dmevmask
= 0;
1259 ip
->i_d
.di_dmstate
= 0;
1260 ip
->i_d
.di_flags
= 0;
1261 flags
= XFS_ILOG_CORE
;
1262 switch (mode
& S_IFMT
) {
1267 ip
->i_d
.di_format
= XFS_DINODE_FMT_DEV
;
1268 ip
->i_df
.if_u2
.if_rdev
= rdev
;
1269 ip
->i_df
.if_flags
= 0;
1270 flags
|= XFS_ILOG_DEV
;
1274 * we can't set up filestreams until after the VFS inode
1275 * is set up properly.
1277 if (pip
&& xfs_inode_is_filestream(pip
))
1281 if (pip
&& (pip
->i_d
.di_flags
& XFS_DIFLAG_ANY
)) {
1284 if (S_ISDIR(mode
)) {
1285 if (pip
->i_d
.di_flags
& XFS_DIFLAG_RTINHERIT
)
1286 di_flags
|= XFS_DIFLAG_RTINHERIT
;
1287 if (pip
->i_d
.di_flags
& XFS_DIFLAG_EXTSZINHERIT
) {
1288 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
1289 ip
->i_d
.di_extsize
= pip
->i_d
.di_extsize
;
1291 } else if (S_ISREG(mode
)) {
1292 if (pip
->i_d
.di_flags
& XFS_DIFLAG_RTINHERIT
)
1293 di_flags
|= XFS_DIFLAG_REALTIME
;
1294 if (pip
->i_d
.di_flags
& XFS_DIFLAG_EXTSZINHERIT
) {
1295 di_flags
|= XFS_DIFLAG_EXTSIZE
;
1296 ip
->i_d
.di_extsize
= pip
->i_d
.di_extsize
;
1299 if ((pip
->i_d
.di_flags
& XFS_DIFLAG_NOATIME
) &&
1300 xfs_inherit_noatime
)
1301 di_flags
|= XFS_DIFLAG_NOATIME
;
1302 if ((pip
->i_d
.di_flags
& XFS_DIFLAG_NODUMP
) &&
1304 di_flags
|= XFS_DIFLAG_NODUMP
;
1305 if ((pip
->i_d
.di_flags
& XFS_DIFLAG_SYNC
) &&
1307 di_flags
|= XFS_DIFLAG_SYNC
;
1308 if ((pip
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) &&
1309 xfs_inherit_nosymlinks
)
1310 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
1311 if (pip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
1312 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
1313 if ((pip
->i_d
.di_flags
& XFS_DIFLAG_NODEFRAG
) &&
1314 xfs_inherit_nodefrag
)
1315 di_flags
|= XFS_DIFLAG_NODEFRAG
;
1316 if (pip
->i_d
.di_flags
& XFS_DIFLAG_FILESTREAM
)
1317 di_flags
|= XFS_DIFLAG_FILESTREAM
;
1318 ip
->i_d
.di_flags
|= di_flags
;
1322 ip
->i_d
.di_format
= XFS_DINODE_FMT_EXTENTS
;
1323 ip
->i_df
.if_flags
= XFS_IFEXTENTS
;
1324 ip
->i_df
.if_bytes
= ip
->i_df
.if_real_bytes
= 0;
1325 ip
->i_df
.if_u1
.if_extents
= NULL
;
1331 * Attribute fork settings for new inode.
1333 ip
->i_d
.di_aformat
= XFS_DINODE_FMT_EXTENTS
;
1334 ip
->i_d
.di_anextents
= 0;
1337 * Log the new values stuffed into the inode.
1339 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1340 xfs_trans_log_inode(tp
, ip
, flags
);
1342 /* now that we have an i_mode we can setup inode ops and unlock */
1343 xfs_setup_inode(ip
);
1345 /* now we have set up the vfs inode we can associate the filestream */
1347 error
= xfs_filestream_associate(pip
, ip
);
1351 xfs_iflags_set(ip
, XFS_IFILESTREAM
);
1359 * Free up the underlying blocks past new_size. The new size must be smaller
1360 * than the current size. This routine can be used both for the attribute and
1361 * data fork, and does not modify the inode size, which is left to the caller.
1363 * The transaction passed to this routine must have made a permanent log
1364 * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the
1365 * given transaction and start new ones, so make sure everything involved in
1366 * the transaction is tidy before calling here. Some transaction will be
1367 * returned to the caller to be committed. The incoming transaction must
1368 * already include the inode, and both inode locks must be held exclusively.
1369 * The inode must also be "held" within the transaction. On return the inode
1370 * will be "held" within the returned transaction. This routine does NOT
1371 * require any disk space to be reserved for it within the transaction.
1373 * If we get an error, we must return with the inode locked and linked into the
1374 * current transaction. This keeps things simple for the higher level code,
1375 * because it always knows that the inode is locked and held in the transaction
1376 * that returns to it whether errors occur or not. We don't mark the inode
1377 * dirty on error so that transactions can be easily aborted if possible.
1380 xfs_itruncate_extents(
1381 struct xfs_trans
**tpp
,
1382 struct xfs_inode
*ip
,
1384 xfs_fsize_t new_size
)
1386 struct xfs_mount
*mp
= ip
->i_mount
;
1387 struct xfs_trans
*tp
= *tpp
;
1388 struct xfs_trans
*ntp
;
1389 xfs_bmap_free_t free_list
;
1390 xfs_fsblock_t first_block
;
1391 xfs_fileoff_t first_unmap_block
;
1392 xfs_fileoff_t last_block
;
1393 xfs_filblks_t unmap_len
;
1398 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1399 ASSERT(!atomic_read(&VFS_I(ip
)->i_count
) ||
1400 xfs_isilocked(ip
, XFS_IOLOCK_EXCL
));
1401 ASSERT(new_size
<= XFS_ISIZE(ip
));
1402 ASSERT(tp
->t_flags
& XFS_TRANS_PERM_LOG_RES
);
1403 ASSERT(ip
->i_itemp
!= NULL
);
1404 ASSERT(ip
->i_itemp
->ili_lock_flags
== 0);
1405 ASSERT(!XFS_NOT_DQATTACHED(mp
, ip
));
1407 trace_xfs_itruncate_extents_start(ip
, new_size
);
1410 * Since it is possible for space to become allocated beyond
1411 * the end of the file (in a crash where the space is allocated
1412 * but the inode size is not yet updated), simply remove any
1413 * blocks which show up between the new EOF and the maximum
1414 * possible file size. If the first block to be removed is
1415 * beyond the maximum file size (ie it is the same as last_block),
1416 * then there is nothing to do.
1418 first_unmap_block
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)new_size
);
1419 last_block
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
1420 if (first_unmap_block
== last_block
)
1423 ASSERT(first_unmap_block
< last_block
);
1424 unmap_len
= last_block
- first_unmap_block
+ 1;
1426 xfs_bmap_init(&free_list
, &first_block
);
1427 error
= xfs_bunmapi(tp
, ip
,
1428 first_unmap_block
, unmap_len
,
1429 xfs_bmapi_aflag(whichfork
),
1430 XFS_ITRUNC_MAX_EXTENTS
,
1431 &first_block
, &free_list
,
1434 goto out_bmap_cancel
;
1437 * Duplicate the transaction that has the permanent
1438 * reservation and commit the old transaction.
1440 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
1442 xfs_trans_ijoin(tp
, ip
, 0);
1444 goto out_bmap_cancel
;
1448 * Mark the inode dirty so it will be logged and
1449 * moved forward in the log as part of every commit.
1451 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1454 ntp
= xfs_trans_dup(tp
);
1455 error
= xfs_trans_commit(tp
, 0);
1458 xfs_trans_ijoin(tp
, ip
, 0);
1464 * Transaction commit worked ok so we can drop the extra ticket
1465 * reference that we gained in xfs_trans_dup()
1467 xfs_log_ticket_put(tp
->t_ticket
);
1468 error
= xfs_trans_reserve(tp
, 0,
1469 XFS_ITRUNCATE_LOG_RES(mp
), 0,
1470 XFS_TRANS_PERM_LOG_RES
,
1471 XFS_ITRUNCATE_LOG_COUNT
);
1477 * Always re-log the inode so that our permanent transaction can keep
1478 * on rolling it forward in the log.
1480 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1482 trace_xfs_itruncate_extents_end(ip
, new_size
);
1489 * If the bunmapi call encounters an error, return to the caller where
1490 * the transaction can be properly aborted. We just need to make sure
1491 * we're not holding any resources that we were not when we came in.
1493 xfs_bmap_cancel(&free_list
);
1498 * This is called when the inode's link count goes to 0.
1499 * We place the on-disk inode on a list in the AGI. It
1500 * will be pulled from this list when the inode is freed.
1517 ASSERT(ip
->i_d
.di_nlink
== 0);
1518 ASSERT(ip
->i_d
.di_mode
!= 0);
1523 * Get the agi buffer first. It ensures lock ordering
1526 error
= xfs_read_agi(mp
, tp
, XFS_INO_TO_AGNO(mp
, ip
->i_ino
), &agibp
);
1529 agi
= XFS_BUF_TO_AGI(agibp
);
1532 * Get the index into the agi hash table for the
1533 * list this inode will go on.
1535 agino
= XFS_INO_TO_AGINO(mp
, ip
->i_ino
);
1537 bucket_index
= agino
% XFS_AGI_UNLINKED_BUCKETS
;
1538 ASSERT(agi
->agi_unlinked
[bucket_index
]);
1539 ASSERT(be32_to_cpu(agi
->agi_unlinked
[bucket_index
]) != agino
);
1541 if (agi
->agi_unlinked
[bucket_index
] != cpu_to_be32(NULLAGINO
)) {
1543 * There is already another inode in the bucket we need
1544 * to add ourselves to. Add us at the front of the list.
1545 * Here we put the head pointer into our next pointer,
1546 * and then we fall through to point the head at us.
1548 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &ibp
,
1553 ASSERT(dip
->di_next_unlinked
== cpu_to_be32(NULLAGINO
));
1554 dip
->di_next_unlinked
= agi
->agi_unlinked
[bucket_index
];
1555 offset
= ip
->i_imap
.im_boffset
+
1556 offsetof(xfs_dinode_t
, di_next_unlinked
);
1557 xfs_trans_inode_buf(tp
, ibp
);
1558 xfs_trans_log_buf(tp
, ibp
, offset
,
1559 (offset
+ sizeof(xfs_agino_t
) - 1));
1560 xfs_inobp_check(mp
, ibp
);
1564 * Point the bucket head pointer at the inode being inserted.
1567 agi
->agi_unlinked
[bucket_index
] = cpu_to_be32(agino
);
1568 offset
= offsetof(xfs_agi_t
, agi_unlinked
) +
1569 (sizeof(xfs_agino_t
) * bucket_index
);
1570 xfs_trans_log_buf(tp
, agibp
, offset
,
1571 (offset
+ sizeof(xfs_agino_t
) - 1));
1576 * Pull the on-disk inode from the AGI unlinked list.
1589 xfs_agnumber_t agno
;
1591 xfs_agino_t next_agino
;
1592 xfs_buf_t
*last_ibp
;
1593 xfs_dinode_t
*last_dip
= NULL
;
1595 int offset
, last_offset
= 0;
1599 agno
= XFS_INO_TO_AGNO(mp
, ip
->i_ino
);
1602 * Get the agi buffer first. It ensures lock ordering
1605 error
= xfs_read_agi(mp
, tp
, agno
, &agibp
);
1609 agi
= XFS_BUF_TO_AGI(agibp
);
1612 * Get the index into the agi hash table for the
1613 * list this inode will go on.
1615 agino
= XFS_INO_TO_AGINO(mp
, ip
->i_ino
);
1617 bucket_index
= agino
% XFS_AGI_UNLINKED_BUCKETS
;
1618 ASSERT(agi
->agi_unlinked
[bucket_index
] != cpu_to_be32(NULLAGINO
));
1619 ASSERT(agi
->agi_unlinked
[bucket_index
]);
1621 if (be32_to_cpu(agi
->agi_unlinked
[bucket_index
]) == agino
) {
1623 * We're at the head of the list. Get the inode's on-disk
1624 * buffer to see if there is anyone after us on the list.
1625 * Only modify our next pointer if it is not already NULLAGINO.
1626 * This saves us the overhead of dealing with the buffer when
1627 * there is no need to change it.
1629 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &ibp
,
1632 xfs_warn(mp
, "%s: xfs_imap_to_bp returned error %d.",
1636 next_agino
= be32_to_cpu(dip
->di_next_unlinked
);
1637 ASSERT(next_agino
!= 0);
1638 if (next_agino
!= NULLAGINO
) {
1639 dip
->di_next_unlinked
= cpu_to_be32(NULLAGINO
);
1640 offset
= ip
->i_imap
.im_boffset
+
1641 offsetof(xfs_dinode_t
, di_next_unlinked
);
1642 xfs_trans_inode_buf(tp
, ibp
);
1643 xfs_trans_log_buf(tp
, ibp
, offset
,
1644 (offset
+ sizeof(xfs_agino_t
) - 1));
1645 xfs_inobp_check(mp
, ibp
);
1647 xfs_trans_brelse(tp
, ibp
);
1650 * Point the bucket head pointer at the next inode.
1652 ASSERT(next_agino
!= 0);
1653 ASSERT(next_agino
!= agino
);
1654 agi
->agi_unlinked
[bucket_index
] = cpu_to_be32(next_agino
);
1655 offset
= offsetof(xfs_agi_t
, agi_unlinked
) +
1656 (sizeof(xfs_agino_t
) * bucket_index
);
1657 xfs_trans_log_buf(tp
, agibp
, offset
,
1658 (offset
+ sizeof(xfs_agino_t
) - 1));
1661 * We need to search the list for the inode being freed.
1663 next_agino
= be32_to_cpu(agi
->agi_unlinked
[bucket_index
]);
1665 while (next_agino
!= agino
) {
1666 struct xfs_imap imap
;
1669 xfs_trans_brelse(tp
, last_ibp
);
1672 next_ino
= XFS_AGINO_TO_INO(mp
, agno
, next_agino
);
1674 error
= xfs_imap(mp
, tp
, next_ino
, &imap
, 0);
1677 "%s: xfs_imap returned error %d.",
1682 error
= xfs_imap_to_bp(mp
, tp
, &imap
, &last_dip
,
1686 "%s: xfs_imap_to_bp returned error %d.",
1691 last_offset
= imap
.im_boffset
;
1692 next_agino
= be32_to_cpu(last_dip
->di_next_unlinked
);
1693 ASSERT(next_agino
!= NULLAGINO
);
1694 ASSERT(next_agino
!= 0);
1698 * Now last_ibp points to the buffer previous to us on the
1699 * unlinked list. Pull us from the list.
1701 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &ibp
,
1704 xfs_warn(mp
, "%s: xfs_imap_to_bp(2) returned error %d.",
1708 next_agino
= be32_to_cpu(dip
->di_next_unlinked
);
1709 ASSERT(next_agino
!= 0);
1710 ASSERT(next_agino
!= agino
);
1711 if (next_agino
!= NULLAGINO
) {
1712 dip
->di_next_unlinked
= cpu_to_be32(NULLAGINO
);
1713 offset
= ip
->i_imap
.im_boffset
+
1714 offsetof(xfs_dinode_t
, di_next_unlinked
);
1715 xfs_trans_inode_buf(tp
, ibp
);
1716 xfs_trans_log_buf(tp
, ibp
, offset
,
1717 (offset
+ sizeof(xfs_agino_t
) - 1));
1718 xfs_inobp_check(mp
, ibp
);
1720 xfs_trans_brelse(tp
, ibp
);
1723 * Point the previous inode on the list to the next inode.
1725 last_dip
->di_next_unlinked
= cpu_to_be32(next_agino
);
1726 ASSERT(next_agino
!= 0);
1727 offset
= last_offset
+ offsetof(xfs_dinode_t
, di_next_unlinked
);
1728 xfs_trans_inode_buf(tp
, last_ibp
);
1729 xfs_trans_log_buf(tp
, last_ibp
, offset
,
1730 (offset
+ sizeof(xfs_agino_t
) - 1));
1731 xfs_inobp_check(mp
, last_ibp
);
1737 * A big issue when freeing the inode cluster is is that we _cannot_ skip any
1738 * inodes that are in memory - they all must be marked stale and attached to
1739 * the cluster buffer.
1743 xfs_inode_t
*free_ip
,
1747 xfs_mount_t
*mp
= free_ip
->i_mount
;
1748 int blks_per_cluster
;
1755 xfs_inode_log_item_t
*iip
;
1756 xfs_log_item_t
*lip
;
1757 struct xfs_perag
*pag
;
1759 pag
= xfs_perag_get(mp
, XFS_INO_TO_AGNO(mp
, inum
));
1760 if (mp
->m_sb
.sb_blocksize
>= XFS_INODE_CLUSTER_SIZE(mp
)) {
1761 blks_per_cluster
= 1;
1762 ninodes
= mp
->m_sb
.sb_inopblock
;
1763 nbufs
= XFS_IALLOC_BLOCKS(mp
);
1765 blks_per_cluster
= XFS_INODE_CLUSTER_SIZE(mp
) /
1766 mp
->m_sb
.sb_blocksize
;
1767 ninodes
= blks_per_cluster
* mp
->m_sb
.sb_inopblock
;
1768 nbufs
= XFS_IALLOC_BLOCKS(mp
) / blks_per_cluster
;
1771 for (j
= 0; j
< nbufs
; j
++, inum
+= ninodes
) {
1772 blkno
= XFS_AGB_TO_DADDR(mp
, XFS_INO_TO_AGNO(mp
, inum
),
1773 XFS_INO_TO_AGBNO(mp
, inum
));
1776 * We obtain and lock the backing buffer first in the process
1777 * here, as we have to ensure that any dirty inode that we
1778 * can't get the flush lock on is attached to the buffer.
1779 * If we scan the in-memory inodes first, then buffer IO can
1780 * complete before we get a lock on it, and hence we may fail
1781 * to mark all the active inodes on the buffer stale.
1783 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, blkno
,
1784 mp
->m_bsize
* blks_per_cluster
,
1791 * This buffer may not have been correctly initialised as we
1792 * didn't read it from disk. That's not important because we are
1793 * only using to mark the buffer as stale in the log, and to
1794 * attach stale cached inodes on it. That means it will never be
1795 * dispatched for IO. If it is, we want to know about it, and we
1796 * want it to fail. We can acheive this by adding a write
1797 * verifier to the buffer.
1799 bp
->b_ops
= &xfs_inode_buf_ops
;
1802 * Walk the inodes already attached to the buffer and mark them
1803 * stale. These will all have the flush locks held, so an
1804 * in-memory inode walk can't lock them. By marking them all
1805 * stale first, we will not attempt to lock them in the loop
1806 * below as the XFS_ISTALE flag will be set.
1810 if (lip
->li_type
== XFS_LI_INODE
) {
1811 iip
= (xfs_inode_log_item_t
*)lip
;
1812 ASSERT(iip
->ili_logged
== 1);
1813 lip
->li_cb
= xfs_istale_done
;
1814 xfs_trans_ail_copy_lsn(mp
->m_ail
,
1815 &iip
->ili_flush_lsn
,
1816 &iip
->ili_item
.li_lsn
);
1817 xfs_iflags_set(iip
->ili_inode
, XFS_ISTALE
);
1819 lip
= lip
->li_bio_list
;
1824 * For each inode in memory attempt to add it to the inode
1825 * buffer and set it up for being staled on buffer IO
1826 * completion. This is safe as we've locked out tail pushing
1827 * and flushing by locking the buffer.
1829 * We have already marked every inode that was part of a
1830 * transaction stale above, which means there is no point in
1831 * even trying to lock them.
1833 for (i
= 0; i
< ninodes
; i
++) {
1836 ip
= radix_tree_lookup(&pag
->pag_ici_root
,
1837 XFS_INO_TO_AGINO(mp
, (inum
+ i
)));
1839 /* Inode not in memory, nothing to do */
1846 * because this is an RCU protected lookup, we could
1847 * find a recently freed or even reallocated inode
1848 * during the lookup. We need to check under the
1849 * i_flags_lock for a valid inode here. Skip it if it
1850 * is not valid, the wrong inode or stale.
1852 spin_lock(&ip
->i_flags_lock
);
1853 if (ip
->i_ino
!= inum
+ i
||
1854 __xfs_iflags_test(ip
, XFS_ISTALE
)) {
1855 spin_unlock(&ip
->i_flags_lock
);
1859 spin_unlock(&ip
->i_flags_lock
);
1862 * Don't try to lock/unlock the current inode, but we
1863 * _cannot_ skip the other inodes that we did not find
1864 * in the list attached to the buffer and are not
1865 * already marked stale. If we can't lock it, back off
1868 if (ip
!= free_ip
&&
1869 !xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
)) {
1877 xfs_iflags_set(ip
, XFS_ISTALE
);
1880 * we don't need to attach clean inodes or those only
1881 * with unlogged changes (which we throw away, anyway).
1884 if (!iip
|| xfs_inode_clean(ip
)) {
1885 ASSERT(ip
!= free_ip
);
1887 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1891 iip
->ili_last_fields
= iip
->ili_fields
;
1892 iip
->ili_fields
= 0;
1893 iip
->ili_logged
= 1;
1894 xfs_trans_ail_copy_lsn(mp
->m_ail
, &iip
->ili_flush_lsn
,
1895 &iip
->ili_item
.li_lsn
);
1897 xfs_buf_attach_iodone(bp
, xfs_istale_done
,
1901 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1904 xfs_trans_stale_inode_buf(tp
, bp
);
1905 xfs_trans_binval(tp
, bp
);
1913 * This is called to return an inode to the inode free list.
1914 * The inode should already be truncated to 0 length and have
1915 * no pages associated with it. This routine also assumes that
1916 * the inode is already a part of the transaction.
1918 * The on-disk copy of the inode will have been added to the list
1919 * of unlinked inodes in the AGI. We need to remove the inode from
1920 * that list atomically with respect to freeing it here.
1926 xfs_bmap_free_t
*flist
)
1930 xfs_ino_t first_ino
;
1934 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1935 ASSERT(ip
->i_d
.di_nlink
== 0);
1936 ASSERT(ip
->i_d
.di_nextents
== 0);
1937 ASSERT(ip
->i_d
.di_anextents
== 0);
1938 ASSERT(ip
->i_d
.di_size
== 0 || !S_ISREG(ip
->i_d
.di_mode
));
1939 ASSERT(ip
->i_d
.di_nblocks
== 0);
1942 * Pull the on-disk inode from the AGI unlinked list.
1944 error
= xfs_iunlink_remove(tp
, ip
);
1949 error
= xfs_difree(tp
, ip
->i_ino
, flist
, &delete, &first_ino
);
1953 ip
->i_d
.di_mode
= 0; /* mark incore inode as free */
1954 ip
->i_d
.di_flags
= 0;
1955 ip
->i_d
.di_dmevmask
= 0;
1956 ip
->i_d
.di_forkoff
= 0; /* mark the attr fork not in use */
1957 ip
->i_d
.di_format
= XFS_DINODE_FMT_EXTENTS
;
1958 ip
->i_d
.di_aformat
= XFS_DINODE_FMT_EXTENTS
;
1960 * Bump the generation count so no one will be confused
1961 * by reincarnations of this inode.
1965 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1967 error
= xfs_imap_to_bp(ip
->i_mount
, tp
, &ip
->i_imap
, &dip
, &ibp
,
1973 * Clear the on-disk di_mode. This is to prevent xfs_bulkstat
1974 * from picking up this inode when it is reclaimed (its incore state
1975 * initialzed but not flushed to disk yet). The in-core di_mode is
1976 * already cleared and a corresponding transaction logged.
1977 * The hack here just synchronizes the in-core to on-disk
1978 * di_mode value in advance before the actual inode sync to disk.
1979 * This is OK because the inode is already unlinked and would never
1980 * change its di_mode again for this inode generation.
1981 * This is a temporary hack that would require a proper fix
1987 error
= xfs_ifree_cluster(ip
, tp
, first_ino
);
1994 * Reallocate the space for if_broot based on the number of records
1995 * being added or deleted as indicated in rec_diff. Move the records
1996 * and pointers in if_broot to fit the new size. When shrinking this
1997 * will eliminate holes between the records and pointers created by
1998 * the caller. When growing this will create holes to be filled in
2001 * The caller must not request to add more records than would fit in
2002 * the on-disk inode root. If the if_broot is currently NULL, then
2003 * if we adding records one will be allocated. The caller must also
2004 * not request that the number of records go below zero, although
2005 * it can go to zero.
2007 * ip -- the inode whose if_broot area is changing
2008 * ext_diff -- the change in the number of records, positive or negative,
2009 * requested for the if_broot array.
2017 struct xfs_mount
*mp
= ip
->i_mount
;
2020 struct xfs_btree_block
*new_broot
;
2027 * Handle the degenerate case quietly.
2029 if (rec_diff
== 0) {
2033 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
2036 * If there wasn't any memory allocated before, just
2037 * allocate it now and get out.
2039 if (ifp
->if_broot_bytes
== 0) {
2040 new_size
= (size_t)XFS_BMAP_BROOT_SPACE_CALC(rec_diff
);
2041 ifp
->if_broot
= kmem_alloc(new_size
, KM_SLEEP
| KM_NOFS
);
2042 ifp
->if_broot_bytes
= (int)new_size
;
2047 * If there is already an existing if_broot, then we need
2048 * to realloc() it and shift the pointers to their new
2049 * location. The records don't change location because
2050 * they are kept butted up against the btree block header.
2052 cur_max
= xfs_bmbt_maxrecs(mp
, ifp
->if_broot_bytes
, 0);
2053 new_max
= cur_max
+ rec_diff
;
2054 new_size
= (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max
);
2055 ifp
->if_broot
= kmem_realloc(ifp
->if_broot
, new_size
,
2056 (size_t)XFS_BMAP_BROOT_SPACE_CALC(cur_max
), /* old size */
2057 KM_SLEEP
| KM_NOFS
);
2058 op
= (char *)XFS_BMAP_BROOT_PTR_ADDR(mp
, ifp
->if_broot
, 1,
2059 ifp
->if_broot_bytes
);
2060 np
= (char *)XFS_BMAP_BROOT_PTR_ADDR(mp
, ifp
->if_broot
, 1,
2062 ifp
->if_broot_bytes
= (int)new_size
;
2063 ASSERT(ifp
->if_broot_bytes
<=
2064 XFS_IFORK_SIZE(ip
, whichfork
) + XFS_BROOT_SIZE_ADJ
);
2065 memmove(np
, op
, cur_max
* (uint
)sizeof(xfs_dfsbno_t
));
2070 * rec_diff is less than 0. In this case, we are shrinking the
2071 * if_broot buffer. It must already exist. If we go to zero
2072 * records, just get rid of the root and clear the status bit.
2074 ASSERT((ifp
->if_broot
!= NULL
) && (ifp
->if_broot_bytes
> 0));
2075 cur_max
= xfs_bmbt_maxrecs(mp
, ifp
->if_broot_bytes
, 0);
2076 new_max
= cur_max
+ rec_diff
;
2077 ASSERT(new_max
>= 0);
2079 new_size
= (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max
);
2083 new_broot
= kmem_alloc(new_size
, KM_SLEEP
| KM_NOFS
);
2085 * First copy over the btree block header.
2087 memcpy(new_broot
, ifp
->if_broot
, XFS_BTREE_LBLOCK_LEN
);
2090 ifp
->if_flags
&= ~XFS_IFBROOT
;
2094 * Only copy the records and pointers if there are any.
2098 * First copy the records.
2100 op
= (char *)XFS_BMBT_REC_ADDR(mp
, ifp
->if_broot
, 1);
2101 np
= (char *)XFS_BMBT_REC_ADDR(mp
, new_broot
, 1);
2102 memcpy(np
, op
, new_max
* (uint
)sizeof(xfs_bmbt_rec_t
));
2105 * Then copy the pointers.
2107 op
= (char *)XFS_BMAP_BROOT_PTR_ADDR(mp
, ifp
->if_broot
, 1,
2108 ifp
->if_broot_bytes
);
2109 np
= (char *)XFS_BMAP_BROOT_PTR_ADDR(mp
, new_broot
, 1,
2111 memcpy(np
, op
, new_max
* (uint
)sizeof(xfs_dfsbno_t
));
2113 kmem_free(ifp
->if_broot
);
2114 ifp
->if_broot
= new_broot
;
2115 ifp
->if_broot_bytes
= (int)new_size
;
2116 ASSERT(ifp
->if_broot_bytes
<=
2117 XFS_IFORK_SIZE(ip
, whichfork
) + XFS_BROOT_SIZE_ADJ
);
2123 * This is called when the amount of space needed for if_data
2124 * is increased or decreased. The change in size is indicated by
2125 * the number of bytes that need to be added or deleted in the
2126 * byte_diff parameter.
2128 * If the amount of space needed has decreased below the size of the
2129 * inline buffer, then switch to using the inline buffer. Otherwise,
2130 * use kmem_realloc() or kmem_alloc() to adjust the size of the buffer
2131 * to what is needed.
2133 * ip -- the inode whose if_data area is changing
2134 * byte_diff -- the change in the number of bytes, positive or negative,
2135 * requested for the if_data array.
2147 if (byte_diff
== 0) {
2151 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
2152 new_size
= (int)ifp
->if_bytes
+ byte_diff
;
2153 ASSERT(new_size
>= 0);
2155 if (new_size
== 0) {
2156 if (ifp
->if_u1
.if_data
!= ifp
->if_u2
.if_inline_data
) {
2157 kmem_free(ifp
->if_u1
.if_data
);
2159 ifp
->if_u1
.if_data
= NULL
;
2161 } else if (new_size
<= sizeof(ifp
->if_u2
.if_inline_data
)) {
2163 * If the valid extents/data can fit in if_inline_ext/data,
2164 * copy them from the malloc'd vector and free it.
2166 if (ifp
->if_u1
.if_data
== NULL
) {
2167 ifp
->if_u1
.if_data
= ifp
->if_u2
.if_inline_data
;
2168 } else if (ifp
->if_u1
.if_data
!= ifp
->if_u2
.if_inline_data
) {
2169 ASSERT(ifp
->if_real_bytes
!= 0);
2170 memcpy(ifp
->if_u2
.if_inline_data
, ifp
->if_u1
.if_data
,
2172 kmem_free(ifp
->if_u1
.if_data
);
2173 ifp
->if_u1
.if_data
= ifp
->if_u2
.if_inline_data
;
2178 * Stuck with malloc/realloc.
2179 * For inline data, the underlying buffer must be
2180 * a multiple of 4 bytes in size so that it can be
2181 * logged and stay on word boundaries. We enforce
2184 real_size
= roundup(new_size
, 4);
2185 if (ifp
->if_u1
.if_data
== NULL
) {
2186 ASSERT(ifp
->if_real_bytes
== 0);
2187 ifp
->if_u1
.if_data
= kmem_alloc(real_size
,
2188 KM_SLEEP
| KM_NOFS
);
2189 } else if (ifp
->if_u1
.if_data
!= ifp
->if_u2
.if_inline_data
) {
2191 * Only do the realloc if the underlying size
2192 * is really changing.
2194 if (ifp
->if_real_bytes
!= real_size
) {
2195 ifp
->if_u1
.if_data
=
2196 kmem_realloc(ifp
->if_u1
.if_data
,
2199 KM_SLEEP
| KM_NOFS
);
2202 ASSERT(ifp
->if_real_bytes
== 0);
2203 ifp
->if_u1
.if_data
= kmem_alloc(real_size
,
2204 KM_SLEEP
| KM_NOFS
);
2205 memcpy(ifp
->if_u1
.if_data
, ifp
->if_u2
.if_inline_data
,
2209 ifp
->if_real_bytes
= real_size
;
2210 ifp
->if_bytes
= new_size
;
2211 ASSERT(ifp
->if_bytes
<= XFS_IFORK_SIZE(ip
, whichfork
));
2221 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
2222 if (ifp
->if_broot
!= NULL
) {
2223 kmem_free(ifp
->if_broot
);
2224 ifp
->if_broot
= NULL
;
2228 * If the format is local, then we can't have an extents
2229 * array so just look for an inline data array. If we're
2230 * not local then we may or may not have an extents list,
2231 * so check and free it up if we do.
2233 if (XFS_IFORK_FORMAT(ip
, whichfork
) == XFS_DINODE_FMT_LOCAL
) {
2234 if ((ifp
->if_u1
.if_data
!= ifp
->if_u2
.if_inline_data
) &&
2235 (ifp
->if_u1
.if_data
!= NULL
)) {
2236 ASSERT(ifp
->if_real_bytes
!= 0);
2237 kmem_free(ifp
->if_u1
.if_data
);
2238 ifp
->if_u1
.if_data
= NULL
;
2239 ifp
->if_real_bytes
= 0;
2241 } else if ((ifp
->if_flags
& XFS_IFEXTENTS
) &&
2242 ((ifp
->if_flags
& XFS_IFEXTIREC
) ||
2243 ((ifp
->if_u1
.if_extents
!= NULL
) &&
2244 (ifp
->if_u1
.if_extents
!= ifp
->if_u2
.if_inline_ext
)))) {
2245 ASSERT(ifp
->if_real_bytes
!= 0);
2246 xfs_iext_destroy(ifp
);
2248 ASSERT(ifp
->if_u1
.if_extents
== NULL
||
2249 ifp
->if_u1
.if_extents
== ifp
->if_u2
.if_inline_ext
);
2250 ASSERT(ifp
->if_real_bytes
== 0);
2251 if (whichfork
== XFS_ATTR_FORK
) {
2252 kmem_zone_free(xfs_ifork_zone
, ip
->i_afp
);
2258 * This is called to unpin an inode. The caller must have the inode locked
2259 * in at least shared mode so that the buffer cannot be subsequently pinned
2260 * once someone is waiting for it to be unpinned.
2264 struct xfs_inode
*ip
)
2266 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
2268 trace_xfs_inode_unpin_nowait(ip
, _RET_IP_
);
2270 /* Give the log a push to start the unpinning I/O */
2271 xfs_log_force_lsn(ip
->i_mount
, ip
->i_itemp
->ili_last_lsn
, 0);
2277 struct xfs_inode
*ip
)
2279 wait_queue_head_t
*wq
= bit_waitqueue(&ip
->i_flags
, __XFS_IPINNED_BIT
);
2280 DEFINE_WAIT_BIT(wait
, &ip
->i_flags
, __XFS_IPINNED_BIT
);
2285 prepare_to_wait(wq
, &wait
.wait
, TASK_UNINTERRUPTIBLE
);
2286 if (xfs_ipincount(ip
))
2288 } while (xfs_ipincount(ip
));
2289 finish_wait(wq
, &wait
.wait
);
2294 struct xfs_inode
*ip
)
2296 if (xfs_ipincount(ip
))
2297 __xfs_iunpin_wait(ip
);
2301 * xfs_iextents_copy()
2303 * This is called to copy the REAL extents (as opposed to the delayed
2304 * allocation extents) from the inode into the given buffer. It
2305 * returns the number of bytes copied into the buffer.
2307 * If there are no delayed allocation extents, then we can just
2308 * memcpy() the extents into the buffer. Otherwise, we need to
2309 * examine each extent in turn and skip those which are delayed.
2321 xfs_fsblock_t start_block
;
2323 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
2324 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
2325 ASSERT(ifp
->if_bytes
> 0);
2327 nrecs
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
2328 XFS_BMAP_TRACE_EXLIST(ip
, nrecs
, whichfork
);
2332 * There are some delayed allocation extents in the
2333 * inode, so copy the extents one at a time and skip
2334 * the delayed ones. There must be at least one
2335 * non-delayed extent.
2338 for (i
= 0; i
< nrecs
; i
++) {
2339 xfs_bmbt_rec_host_t
*ep
= xfs_iext_get_ext(ifp
, i
);
2340 start_block
= xfs_bmbt_get_startblock(ep
);
2341 if (isnullstartblock(start_block
)) {
2343 * It's a delayed allocation extent, so skip it.
2348 /* Translate to on disk format */
2349 put_unaligned(cpu_to_be64(ep
->l0
), &dp
->l0
);
2350 put_unaligned(cpu_to_be64(ep
->l1
), &dp
->l1
);
2354 ASSERT(copied
!= 0);
2355 xfs_validate_extents(ifp
, copied
, XFS_EXTFMT_INODE(ip
));
2357 return (copied
* (uint
)sizeof(xfs_bmbt_rec_t
));
2361 * Each of the following cases stores data into the same region
2362 * of the on-disk inode, so only one of them can be valid at
2363 * any given time. While it is possible to have conflicting formats
2364 * and log flags, e.g. having XFS_ILOG_?DATA set when the fork is
2365 * in EXTENTS format, this can only happen when the fork has
2366 * changed formats after being modified but before being flushed.
2367 * In these cases, the format always takes precedence, because the
2368 * format indicates the current state of the fork.
2375 xfs_inode_log_item_t
*iip
,
2382 static const short brootflag
[2] =
2383 { XFS_ILOG_DBROOT
, XFS_ILOG_ABROOT
};
2384 static const short dataflag
[2] =
2385 { XFS_ILOG_DDATA
, XFS_ILOG_ADATA
};
2386 static const short extflag
[2] =
2387 { XFS_ILOG_DEXT
, XFS_ILOG_AEXT
};
2391 ifp
= XFS_IFORK_PTR(ip
, whichfork
);
2393 * This can happen if we gave up in iformat in an error path,
2394 * for the attribute fork.
2397 ASSERT(whichfork
== XFS_ATTR_FORK
);
2400 cp
= XFS_DFORK_PTR(dip
, whichfork
);
2402 switch (XFS_IFORK_FORMAT(ip
, whichfork
)) {
2403 case XFS_DINODE_FMT_LOCAL
:
2404 if ((iip
->ili_fields
& dataflag
[whichfork
]) &&
2405 (ifp
->if_bytes
> 0)) {
2406 ASSERT(ifp
->if_u1
.if_data
!= NULL
);
2407 ASSERT(ifp
->if_bytes
<= XFS_IFORK_SIZE(ip
, whichfork
));
2408 memcpy(cp
, ifp
->if_u1
.if_data
, ifp
->if_bytes
);
2412 case XFS_DINODE_FMT_EXTENTS
:
2413 ASSERT((ifp
->if_flags
& XFS_IFEXTENTS
) ||
2414 !(iip
->ili_fields
& extflag
[whichfork
]));
2415 if ((iip
->ili_fields
& extflag
[whichfork
]) &&
2416 (ifp
->if_bytes
> 0)) {
2417 ASSERT(xfs_iext_get_ext(ifp
, 0));
2418 ASSERT(XFS_IFORK_NEXTENTS(ip
, whichfork
) > 0);
2419 (void)xfs_iextents_copy(ip
, (xfs_bmbt_rec_t
*)cp
,
2424 case XFS_DINODE_FMT_BTREE
:
2425 if ((iip
->ili_fields
& brootflag
[whichfork
]) &&
2426 (ifp
->if_broot_bytes
> 0)) {
2427 ASSERT(ifp
->if_broot
!= NULL
);
2428 ASSERT(ifp
->if_broot_bytes
<=
2429 (XFS_IFORK_SIZE(ip
, whichfork
) +
2430 XFS_BROOT_SIZE_ADJ
));
2431 xfs_bmbt_to_bmdr(mp
, ifp
->if_broot
, ifp
->if_broot_bytes
,
2432 (xfs_bmdr_block_t
*)cp
,
2433 XFS_DFORK_SIZE(dip
, mp
, whichfork
));
2437 case XFS_DINODE_FMT_DEV
:
2438 if (iip
->ili_fields
& XFS_ILOG_DEV
) {
2439 ASSERT(whichfork
== XFS_DATA_FORK
);
2440 xfs_dinode_put_rdev(dip
, ip
->i_df
.if_u2
.if_rdev
);
2444 case XFS_DINODE_FMT_UUID
:
2445 if (iip
->ili_fields
& XFS_ILOG_UUID
) {
2446 ASSERT(whichfork
== XFS_DATA_FORK
);
2447 memcpy(XFS_DFORK_DPTR(dip
),
2448 &ip
->i_df
.if_u2
.if_uuid
,
2464 xfs_mount_t
*mp
= ip
->i_mount
;
2465 struct xfs_perag
*pag
;
2466 unsigned long first_index
, mask
;
2467 unsigned long inodes_per_cluster
;
2469 xfs_inode_t
**ilist
;
2476 pag
= xfs_perag_get(mp
, XFS_INO_TO_AGNO(mp
, ip
->i_ino
));
2478 inodes_per_cluster
= XFS_INODE_CLUSTER_SIZE(mp
) >> mp
->m_sb
.sb_inodelog
;
2479 ilist_size
= inodes_per_cluster
* sizeof(xfs_inode_t
*);
2480 ilist
= kmem_alloc(ilist_size
, KM_MAYFAIL
|KM_NOFS
);
2484 mask
= ~(((XFS_INODE_CLUSTER_SIZE(mp
) >> mp
->m_sb
.sb_inodelog
)) - 1);
2485 first_index
= XFS_INO_TO_AGINO(mp
, ip
->i_ino
) & mask
;
2487 /* really need a gang lookup range call here */
2488 nr_found
= radix_tree_gang_lookup(&pag
->pag_ici_root
, (void**)ilist
,
2489 first_index
, inodes_per_cluster
);
2493 for (i
= 0; i
< nr_found
; i
++) {
2499 * because this is an RCU protected lookup, we could find a
2500 * recently freed or even reallocated inode during the lookup.
2501 * We need to check under the i_flags_lock for a valid inode
2502 * here. Skip it if it is not valid or the wrong inode.
2504 spin_lock(&ip
->i_flags_lock
);
2506 (XFS_INO_TO_AGINO(mp
, iq
->i_ino
) & mask
) != first_index
) {
2507 spin_unlock(&ip
->i_flags_lock
);
2510 spin_unlock(&ip
->i_flags_lock
);
2513 * Do an un-protected check to see if the inode is dirty and
2514 * is a candidate for flushing. These checks will be repeated
2515 * later after the appropriate locks are acquired.
2517 if (xfs_inode_clean(iq
) && xfs_ipincount(iq
) == 0)
2521 * Try to get locks. If any are unavailable or it is pinned,
2522 * then this inode cannot be flushed and is skipped.
2525 if (!xfs_ilock_nowait(iq
, XFS_ILOCK_SHARED
))
2527 if (!xfs_iflock_nowait(iq
)) {
2528 xfs_iunlock(iq
, XFS_ILOCK_SHARED
);
2531 if (xfs_ipincount(iq
)) {
2533 xfs_iunlock(iq
, XFS_ILOCK_SHARED
);
2538 * arriving here means that this inode can be flushed. First
2539 * re-check that it's dirty before flushing.
2541 if (!xfs_inode_clean(iq
)) {
2543 error
= xfs_iflush_int(iq
, bp
);
2545 xfs_iunlock(iq
, XFS_ILOCK_SHARED
);
2546 goto cluster_corrupt_out
;
2552 xfs_iunlock(iq
, XFS_ILOCK_SHARED
);
2556 XFS_STATS_INC(xs_icluster_flushcnt
);
2557 XFS_STATS_ADD(xs_icluster_flushinode
, clcount
);
2568 cluster_corrupt_out
:
2570 * Corruption detected in the clustering loop. Invalidate the
2571 * inode buffer and shut down the filesystem.
2575 * Clean up the buffer. If it was delwri, just release it --
2576 * brelse can handle it with no problems. If not, shut down the
2577 * filesystem before releasing the buffer.
2579 bufwasdelwri
= (bp
->b_flags
& _XBF_DELWRI_Q
);
2583 xfs_force_shutdown(mp
, SHUTDOWN_CORRUPT_INCORE
);
2585 if (!bufwasdelwri
) {
2587 * Just like incore_relse: if we have b_iodone functions,
2588 * mark the buffer as an error and call them. Otherwise
2589 * mark it as stale and brelse.
2594 xfs_buf_ioerror(bp
, EIO
);
2595 xfs_buf_ioend(bp
, 0);
2603 * Unlocks the flush lock
2605 xfs_iflush_abort(iq
, false);
2608 return XFS_ERROR(EFSCORRUPTED
);
2612 * Flush dirty inode metadata into the backing buffer.
2614 * The caller must have the inode lock and the inode flush lock held. The
2615 * inode lock will still be held upon return to the caller, and the inode
2616 * flush lock will be released after the inode has reached the disk.
2618 * The caller must write out the buffer returned in *bpp and release it.
2622 struct xfs_inode
*ip
,
2623 struct xfs_buf
**bpp
)
2625 struct xfs_mount
*mp
= ip
->i_mount
;
2627 struct xfs_dinode
*dip
;
2630 XFS_STATS_INC(xs_iflush_count
);
2632 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
2633 ASSERT(xfs_isiflocked(ip
));
2634 ASSERT(ip
->i_d
.di_format
!= XFS_DINODE_FMT_BTREE
||
2635 ip
->i_d
.di_nextents
> XFS_IFORK_MAXEXT(ip
, XFS_DATA_FORK
));
2639 xfs_iunpin_wait(ip
);
2642 * For stale inodes we cannot rely on the backing buffer remaining
2643 * stale in cache for the remaining life of the stale inode and so
2644 * xfs_imap_to_bp() below may give us a buffer that no longer contains
2645 * inodes below. We have to check this after ensuring the inode is
2646 * unpinned so that it is safe to reclaim the stale inode after the
2649 if (xfs_iflags_test(ip
, XFS_ISTALE
)) {
2655 * This may have been unpinned because the filesystem is shutting
2656 * down forcibly. If that's the case we must not write this inode
2657 * to disk, because the log record didn't make it to disk.
2659 * We also have to remove the log item from the AIL in this case,
2660 * as we wait for an empty AIL as part of the unmount process.
2662 if (XFS_FORCED_SHUTDOWN(mp
)) {
2663 error
= XFS_ERROR(EIO
);
2668 * Get the buffer containing the on-disk inode.
2670 error
= xfs_imap_to_bp(mp
, NULL
, &ip
->i_imap
, &dip
, &bp
, XBF_TRYLOCK
,
2678 * First flush out the inode that xfs_iflush was called with.
2680 error
= xfs_iflush_int(ip
, bp
);
2685 * If the buffer is pinned then push on the log now so we won't
2686 * get stuck waiting in the write for too long.
2688 if (xfs_buf_ispinned(bp
))
2689 xfs_log_force(mp
, 0);
2693 * see if other inodes can be gathered into this write
2695 error
= xfs_iflush_cluster(ip
, bp
);
2697 goto cluster_corrupt_out
;
2704 xfs_force_shutdown(mp
, SHUTDOWN_CORRUPT_INCORE
);
2705 cluster_corrupt_out
:
2706 error
= XFS_ERROR(EFSCORRUPTED
);
2709 * Unlocks the flush lock
2711 xfs_iflush_abort(ip
, false);
2721 xfs_inode_log_item_t
*iip
;
2725 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
2726 ASSERT(xfs_isiflocked(ip
));
2727 ASSERT(ip
->i_d
.di_format
!= XFS_DINODE_FMT_BTREE
||
2728 ip
->i_d
.di_nextents
> XFS_IFORK_MAXEXT(ip
, XFS_DATA_FORK
));
2733 /* set *dip = inode's place in the buffer */
2734 dip
= (xfs_dinode_t
*)xfs_buf_offset(bp
, ip
->i_imap
.im_boffset
);
2736 if (XFS_TEST_ERROR(dip
->di_magic
!= cpu_to_be16(XFS_DINODE_MAGIC
),
2737 mp
, XFS_ERRTAG_IFLUSH_1
, XFS_RANDOM_IFLUSH_1
)) {
2738 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2739 "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p",
2740 __func__
, ip
->i_ino
, be16_to_cpu(dip
->di_magic
), dip
);
2743 if (XFS_TEST_ERROR(ip
->i_d
.di_magic
!= XFS_DINODE_MAGIC
,
2744 mp
, XFS_ERRTAG_IFLUSH_2
, XFS_RANDOM_IFLUSH_2
)) {
2745 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2746 "%s: Bad inode %Lu, ptr 0x%p, magic number 0x%x",
2747 __func__
, ip
->i_ino
, ip
, ip
->i_d
.di_magic
);
2750 if (S_ISREG(ip
->i_d
.di_mode
)) {
2752 (ip
->i_d
.di_format
!= XFS_DINODE_FMT_EXTENTS
) &&
2753 (ip
->i_d
.di_format
!= XFS_DINODE_FMT_BTREE
),
2754 mp
, XFS_ERRTAG_IFLUSH_3
, XFS_RANDOM_IFLUSH_3
)) {
2755 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2756 "%s: Bad regular inode %Lu, ptr 0x%p",
2757 __func__
, ip
->i_ino
, ip
);
2760 } else if (S_ISDIR(ip
->i_d
.di_mode
)) {
2762 (ip
->i_d
.di_format
!= XFS_DINODE_FMT_EXTENTS
) &&
2763 (ip
->i_d
.di_format
!= XFS_DINODE_FMT_BTREE
) &&
2764 (ip
->i_d
.di_format
!= XFS_DINODE_FMT_LOCAL
),
2765 mp
, XFS_ERRTAG_IFLUSH_4
, XFS_RANDOM_IFLUSH_4
)) {
2766 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2767 "%s: Bad directory inode %Lu, ptr 0x%p",
2768 __func__
, ip
->i_ino
, ip
);
2772 if (XFS_TEST_ERROR(ip
->i_d
.di_nextents
+ ip
->i_d
.di_anextents
>
2773 ip
->i_d
.di_nblocks
, mp
, XFS_ERRTAG_IFLUSH_5
,
2774 XFS_RANDOM_IFLUSH_5
)) {
2775 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2776 "%s: detected corrupt incore inode %Lu, "
2777 "total extents = %d, nblocks = %Ld, ptr 0x%p",
2778 __func__
, ip
->i_ino
,
2779 ip
->i_d
.di_nextents
+ ip
->i_d
.di_anextents
,
2780 ip
->i_d
.di_nblocks
, ip
);
2783 if (XFS_TEST_ERROR(ip
->i_d
.di_forkoff
> mp
->m_sb
.sb_inodesize
,
2784 mp
, XFS_ERRTAG_IFLUSH_6
, XFS_RANDOM_IFLUSH_6
)) {
2785 xfs_alert_tag(mp
, XFS_PTAG_IFLUSH
,
2786 "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p",
2787 __func__
, ip
->i_ino
, ip
->i_d
.di_forkoff
, ip
);
2791 * bump the flush iteration count, used to detect flushes which
2792 * postdate a log record during recovery.
2795 ip
->i_d
.di_flushiter
++;
2798 * Copy the dirty parts of the inode into the on-disk
2799 * inode. We always copy out the core of the inode,
2800 * because if the inode is dirty at all the core must
2803 xfs_dinode_to_disk(dip
, &ip
->i_d
);
2805 /* Wrap, we never let the log put out DI_MAX_FLUSH */
2806 if (ip
->i_d
.di_flushiter
== DI_MAX_FLUSH
)
2807 ip
->i_d
.di_flushiter
= 0;
2810 * If this is really an old format inode and the superblock version
2811 * has not been updated to support only new format inodes, then
2812 * convert back to the old inode format. If the superblock version
2813 * has been updated, then make the conversion permanent.
2815 ASSERT(ip
->i_d
.di_version
== 1 || xfs_sb_version_hasnlink(&mp
->m_sb
));
2816 if (ip
->i_d
.di_version
== 1) {
2817 if (!xfs_sb_version_hasnlink(&mp
->m_sb
)) {
2821 ASSERT(ip
->i_d
.di_nlink
<= XFS_MAXLINK_1
);
2822 dip
->di_onlink
= cpu_to_be16(ip
->i_d
.di_nlink
);
2825 * The superblock version has already been bumped,
2826 * so just make the conversion to the new inode
2829 ip
->i_d
.di_version
= 2;
2830 dip
->di_version
= 2;
2831 ip
->i_d
.di_onlink
= 0;
2833 memset(&(ip
->i_d
.di_pad
[0]), 0, sizeof(ip
->i_d
.di_pad
));
2834 memset(&(dip
->di_pad
[0]), 0,
2835 sizeof(dip
->di_pad
));
2836 ASSERT(xfs_get_projid(ip
) == 0);
2840 xfs_iflush_fork(ip
, dip
, iip
, XFS_DATA_FORK
, bp
);
2841 if (XFS_IFORK_Q(ip
))
2842 xfs_iflush_fork(ip
, dip
, iip
, XFS_ATTR_FORK
, bp
);
2843 xfs_inobp_check(mp
, bp
);
2846 * We've recorded everything logged in the inode, so we'd like to clear
2847 * the ili_fields bits so we don't log and flush things unnecessarily.
2848 * However, we can't stop logging all this information until the data
2849 * we've copied into the disk buffer is written to disk. If we did we
2850 * might overwrite the copy of the inode in the log with all the data
2851 * after re-logging only part of it, and in the face of a crash we
2852 * wouldn't have all the data we need to recover.
2854 * What we do is move the bits to the ili_last_fields field. When
2855 * logging the inode, these bits are moved back to the ili_fields field.
2856 * In the xfs_iflush_done() routine we clear ili_last_fields, since we
2857 * know that the information those bits represent is permanently on
2858 * disk. As long as the flush completes before the inode is logged
2859 * again, then both ili_fields and ili_last_fields will be cleared.
2861 * We can play with the ili_fields bits here, because the inode lock
2862 * must be held exclusively in order to set bits there and the flush
2863 * lock protects the ili_last_fields bits. Set ili_logged so the flush
2864 * done routine can tell whether or not to look in the AIL. Also, store
2865 * the current LSN of the inode so that we can tell whether the item has
2866 * moved in the AIL from xfs_iflush_done(). In order to read the lsn we
2867 * need the AIL lock, because it is a 64 bit value that cannot be read
2870 if (iip
!= NULL
&& iip
->ili_fields
!= 0) {
2871 iip
->ili_last_fields
= iip
->ili_fields
;
2872 iip
->ili_fields
= 0;
2873 iip
->ili_logged
= 1;
2875 xfs_trans_ail_copy_lsn(mp
->m_ail
, &iip
->ili_flush_lsn
,
2876 &iip
->ili_item
.li_lsn
);
2879 * Attach the function xfs_iflush_done to the inode's
2880 * buffer. This will remove the inode from the AIL
2881 * and unlock the inode's flush lock when the inode is
2882 * completely written to disk.
2884 xfs_buf_attach_iodone(bp
, xfs_iflush_done
, &iip
->ili_item
);
2886 ASSERT(bp
->b_fspriv
!= NULL
);
2887 ASSERT(bp
->b_iodone
!= NULL
);
2890 * We're flushing an inode which is not in the AIL and has
2891 * not been logged. For this case we can immediately drop
2892 * the inode flush lock because we can avoid the whole
2893 * AIL state thing. It's OK to drop the flush lock now,
2894 * because we've already locked the buffer and to do anything
2895 * you really need both.
2898 ASSERT(iip
->ili_logged
== 0);
2899 ASSERT(iip
->ili_last_fields
== 0);
2900 ASSERT((iip
->ili_item
.li_flags
& XFS_LI_IN_AIL
) == 0);
2908 return XFS_ERROR(EFSCORRUPTED
);
2912 * Return a pointer to the extent record at file index idx.
2914 xfs_bmbt_rec_host_t
*
2916 xfs_ifork_t
*ifp
, /* inode fork pointer */
2917 xfs_extnum_t idx
) /* index of target extent */
2920 ASSERT(idx
< ifp
->if_bytes
/ sizeof(xfs_bmbt_rec_t
));
2922 if ((ifp
->if_flags
& XFS_IFEXTIREC
) && (idx
== 0)) {
2923 return ifp
->if_u1
.if_ext_irec
->er_extbuf
;
2924 } else if (ifp
->if_flags
& XFS_IFEXTIREC
) {
2925 xfs_ext_irec_t
*erp
; /* irec pointer */
2926 int erp_idx
= 0; /* irec index */
2927 xfs_extnum_t page_idx
= idx
; /* ext index in target list */
2929 erp
= xfs_iext_idx_to_irec(ifp
, &page_idx
, &erp_idx
, 0);
2930 return &erp
->er_extbuf
[page_idx
];
2931 } else if (ifp
->if_bytes
) {
2932 return &ifp
->if_u1
.if_extents
[idx
];
2939 * Insert new item(s) into the extent records for incore inode
2940 * fork 'ifp'. 'count' new items are inserted at index 'idx'.
2944 xfs_inode_t
*ip
, /* incore inode pointer */
2945 xfs_extnum_t idx
, /* starting index of new items */
2946 xfs_extnum_t count
, /* number of inserted items */
2947 xfs_bmbt_irec_t
*new, /* items to insert */
2948 int state
) /* type of extent conversion */
2950 xfs_ifork_t
*ifp
= (state
& BMAP_ATTRFORK
) ? ip
->i_afp
: &ip
->i_df
;
2951 xfs_extnum_t i
; /* extent record index */
2953 trace_xfs_iext_insert(ip
, idx
, new, state
, _RET_IP_
);
2955 ASSERT(ifp
->if_flags
& XFS_IFEXTENTS
);
2956 xfs_iext_add(ifp
, idx
, count
);
2957 for (i
= idx
; i
< idx
+ count
; i
++, new++)
2958 xfs_bmbt_set_all(xfs_iext_get_ext(ifp
, i
), new);
2962 * This is called when the amount of space required for incore file
2963 * extents needs to be increased. The ext_diff parameter stores the
2964 * number of new extents being added and the idx parameter contains
2965 * the extent index where the new extents will be added. If the new
2966 * extents are being appended, then we just need to (re)allocate and
2967 * initialize the space. Otherwise, if the new extents are being
2968 * inserted into the middle of the existing entries, a bit more work
2969 * is required to make room for the new extents to be inserted. The
2970 * caller is responsible for filling in the new extent entries upon
2975 xfs_ifork_t
*ifp
, /* inode fork pointer */
2976 xfs_extnum_t idx
, /* index to begin adding exts */
2977 int ext_diff
) /* number of extents to add */
2979 int byte_diff
; /* new bytes being added */
2980 int new_size
; /* size of extents after adding */
2981 xfs_extnum_t nextents
; /* number of extents in file */
2983 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
2984 ASSERT((idx
>= 0) && (idx
<= nextents
));
2985 byte_diff
= ext_diff
* sizeof(xfs_bmbt_rec_t
);
2986 new_size
= ifp
->if_bytes
+ byte_diff
;
2988 * If the new number of extents (nextents + ext_diff)
2989 * fits inside the inode, then continue to use the inline
2992 if (nextents
+ ext_diff
<= XFS_INLINE_EXTS
) {
2993 if (idx
< nextents
) {
2994 memmove(&ifp
->if_u2
.if_inline_ext
[idx
+ ext_diff
],
2995 &ifp
->if_u2
.if_inline_ext
[idx
],
2996 (nextents
- idx
) * sizeof(xfs_bmbt_rec_t
));
2997 memset(&ifp
->if_u2
.if_inline_ext
[idx
], 0, byte_diff
);
2999 ifp
->if_u1
.if_extents
= ifp
->if_u2
.if_inline_ext
;
3000 ifp
->if_real_bytes
= 0;
3003 * Otherwise use a linear (direct) extent list.
3004 * If the extents are currently inside the inode,
3005 * xfs_iext_realloc_direct will switch us from
3006 * inline to direct extent allocation mode.
3008 else if (nextents
+ ext_diff
<= XFS_LINEAR_EXTS
) {
3009 xfs_iext_realloc_direct(ifp
, new_size
);
3010 if (idx
< nextents
) {
3011 memmove(&ifp
->if_u1
.if_extents
[idx
+ ext_diff
],
3012 &ifp
->if_u1
.if_extents
[idx
],
3013 (nextents
- idx
) * sizeof(xfs_bmbt_rec_t
));
3014 memset(&ifp
->if_u1
.if_extents
[idx
], 0, byte_diff
);
3017 /* Indirection array */
3019 xfs_ext_irec_t
*erp
;
3023 ASSERT(nextents
+ ext_diff
> XFS_LINEAR_EXTS
);
3024 if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3025 erp
= xfs_iext_idx_to_irec(ifp
, &page_idx
, &erp_idx
, 1);
3027 xfs_iext_irec_init(ifp
);
3028 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3029 erp
= ifp
->if_u1
.if_ext_irec
;
3031 /* Extents fit in target extent page */
3032 if (erp
&& erp
->er_extcount
+ ext_diff
<= XFS_LINEAR_EXTS
) {
3033 if (page_idx
< erp
->er_extcount
) {
3034 memmove(&erp
->er_extbuf
[page_idx
+ ext_diff
],
3035 &erp
->er_extbuf
[page_idx
],
3036 (erp
->er_extcount
- page_idx
) *
3037 sizeof(xfs_bmbt_rec_t
));
3038 memset(&erp
->er_extbuf
[page_idx
], 0, byte_diff
);
3040 erp
->er_extcount
+= ext_diff
;
3041 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, ext_diff
);
3043 /* Insert a new extent page */
3045 xfs_iext_add_indirect_multi(ifp
,
3046 erp_idx
, page_idx
, ext_diff
);
3049 * If extent(s) are being appended to the last page in
3050 * the indirection array and the new extent(s) don't fit
3051 * in the page, then erp is NULL and erp_idx is set to
3052 * the next index needed in the indirection array.
3055 int count
= ext_diff
;
3058 erp
= xfs_iext_irec_new(ifp
, erp_idx
);
3059 erp
->er_extcount
= count
;
3060 count
-= MIN(count
, (int)XFS_LINEAR_EXTS
);
3067 ifp
->if_bytes
= new_size
;
3071 * This is called when incore extents are being added to the indirection
3072 * array and the new extents do not fit in the target extent list. The
3073 * erp_idx parameter contains the irec index for the target extent list
3074 * in the indirection array, and the idx parameter contains the extent
3075 * index within the list. The number of extents being added is stored
3076 * in the count parameter.
3078 * |-------| |-------|
3079 * | | | | idx - number of extents before idx
3081 * | | | | count - number of extents being inserted at idx
3082 * |-------| |-------|
3083 * | count | | nex2 | nex2 - number of extents after idx + count
3084 * |-------| |-------|
3087 xfs_iext_add_indirect_multi(
3088 xfs_ifork_t
*ifp
, /* inode fork pointer */
3089 int erp_idx
, /* target extent irec index */
3090 xfs_extnum_t idx
, /* index within target list */
3091 int count
) /* new extents being added */
3093 int byte_diff
; /* new bytes being added */
3094 xfs_ext_irec_t
*erp
; /* pointer to irec entry */
3095 xfs_extnum_t ext_diff
; /* number of extents to add */
3096 xfs_extnum_t ext_cnt
; /* new extents still needed */
3097 xfs_extnum_t nex2
; /* extents after idx + count */
3098 xfs_bmbt_rec_t
*nex2_ep
= NULL
; /* temp list for nex2 extents */
3099 int nlists
; /* number of irec's (lists) */
3101 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3102 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3103 nex2
= erp
->er_extcount
- idx
;
3104 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3107 * Save second part of target extent list
3108 * (all extents past */
3110 byte_diff
= nex2
* sizeof(xfs_bmbt_rec_t
);
3111 nex2_ep
= (xfs_bmbt_rec_t
*) kmem_alloc(byte_diff
, KM_NOFS
);
3112 memmove(nex2_ep
, &erp
->er_extbuf
[idx
], byte_diff
);
3113 erp
->er_extcount
-= nex2
;
3114 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, -nex2
);
3115 memset(&erp
->er_extbuf
[idx
], 0, byte_diff
);
3119 * Add the new extents to the end of the target
3120 * list, then allocate new irec record(s) and
3121 * extent buffer(s) as needed to store the rest
3122 * of the new extents.
3125 ext_diff
= MIN(ext_cnt
, (int)XFS_LINEAR_EXTS
- erp
->er_extcount
);
3127 erp
->er_extcount
+= ext_diff
;
3128 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, ext_diff
);
3129 ext_cnt
-= ext_diff
;
3133 erp
= xfs_iext_irec_new(ifp
, erp_idx
);
3134 ext_diff
= MIN(ext_cnt
, (int)XFS_LINEAR_EXTS
);
3135 erp
->er_extcount
= ext_diff
;
3136 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, ext_diff
);
3137 ext_cnt
-= ext_diff
;
3140 /* Add nex2 extents back to indirection array */
3142 xfs_extnum_t ext_avail
;
3145 byte_diff
= nex2
* sizeof(xfs_bmbt_rec_t
);
3146 ext_avail
= XFS_LINEAR_EXTS
- erp
->er_extcount
;
3149 * If nex2 extents fit in the current page, append
3150 * nex2_ep after the new extents.
3152 if (nex2
<= ext_avail
) {
3153 i
= erp
->er_extcount
;
3156 * Otherwise, check if space is available in the
3159 else if ((erp_idx
< nlists
- 1) &&
3160 (nex2
<= (ext_avail
= XFS_LINEAR_EXTS
-
3161 ifp
->if_u1
.if_ext_irec
[erp_idx
+1].er_extcount
))) {
3164 /* Create a hole for nex2 extents */
3165 memmove(&erp
->er_extbuf
[nex2
], erp
->er_extbuf
,
3166 erp
->er_extcount
* sizeof(xfs_bmbt_rec_t
));
3169 * Final choice, create a new extent page for
3174 erp
= xfs_iext_irec_new(ifp
, erp_idx
);
3176 memmove(&erp
->er_extbuf
[i
], nex2_ep
, byte_diff
);
3178 erp
->er_extcount
+= nex2
;
3179 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, nex2
);
3184 * This is called when the amount of space required for incore file
3185 * extents needs to be decreased. The ext_diff parameter stores the
3186 * number of extents to be removed and the idx parameter contains
3187 * the extent index where the extents will be removed from.
3189 * If the amount of space needed has decreased below the linear
3190 * limit, XFS_IEXT_BUFSZ, then switch to using the contiguous
3191 * extent array. Otherwise, use kmem_realloc() to adjust the
3192 * size to what is needed.
3196 xfs_inode_t
*ip
, /* incore inode pointer */
3197 xfs_extnum_t idx
, /* index to begin removing exts */
3198 int ext_diff
, /* number of extents to remove */
3199 int state
) /* type of extent conversion */
3201 xfs_ifork_t
*ifp
= (state
& BMAP_ATTRFORK
) ? ip
->i_afp
: &ip
->i_df
;
3202 xfs_extnum_t nextents
; /* number of extents in file */
3203 int new_size
; /* size of extents after removal */
3205 trace_xfs_iext_remove(ip
, idx
, state
, _RET_IP_
);
3207 ASSERT(ext_diff
> 0);
3208 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3209 new_size
= (nextents
- ext_diff
) * sizeof(xfs_bmbt_rec_t
);
3211 if (new_size
== 0) {
3212 xfs_iext_destroy(ifp
);
3213 } else if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3214 xfs_iext_remove_indirect(ifp
, idx
, ext_diff
);
3215 } else if (ifp
->if_real_bytes
) {
3216 xfs_iext_remove_direct(ifp
, idx
, ext_diff
);
3218 xfs_iext_remove_inline(ifp
, idx
, ext_diff
);
3220 ifp
->if_bytes
= new_size
;
3224 * This removes ext_diff extents from the inline buffer, beginning
3225 * at extent index idx.
3228 xfs_iext_remove_inline(
3229 xfs_ifork_t
*ifp
, /* inode fork pointer */
3230 xfs_extnum_t idx
, /* index to begin removing exts */
3231 int ext_diff
) /* number of extents to remove */
3233 int nextents
; /* number of extents in file */
3235 ASSERT(!(ifp
->if_flags
& XFS_IFEXTIREC
));
3236 ASSERT(idx
< XFS_INLINE_EXTS
);
3237 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3238 ASSERT(((nextents
- ext_diff
) > 0) &&
3239 (nextents
- ext_diff
) < XFS_INLINE_EXTS
);
3241 if (idx
+ ext_diff
< nextents
) {
3242 memmove(&ifp
->if_u2
.if_inline_ext
[idx
],
3243 &ifp
->if_u2
.if_inline_ext
[idx
+ ext_diff
],
3244 (nextents
- (idx
+ ext_diff
)) *
3245 sizeof(xfs_bmbt_rec_t
));
3246 memset(&ifp
->if_u2
.if_inline_ext
[nextents
- ext_diff
],
3247 0, ext_diff
* sizeof(xfs_bmbt_rec_t
));
3249 memset(&ifp
->if_u2
.if_inline_ext
[idx
], 0,
3250 ext_diff
* sizeof(xfs_bmbt_rec_t
));
3255 * This removes ext_diff extents from a linear (direct) extent list,
3256 * beginning at extent index idx. If the extents are being removed
3257 * from the end of the list (ie. truncate) then we just need to re-
3258 * allocate the list to remove the extra space. Otherwise, if the
3259 * extents are being removed from the middle of the existing extent
3260 * entries, then we first need to move the extent records beginning
3261 * at idx + ext_diff up in the list to overwrite the records being
3262 * removed, then remove the extra space via kmem_realloc.
3265 xfs_iext_remove_direct(
3266 xfs_ifork_t
*ifp
, /* inode fork pointer */
3267 xfs_extnum_t idx
, /* index to begin removing exts */
3268 int ext_diff
) /* number of extents to remove */
3270 xfs_extnum_t nextents
; /* number of extents in file */
3271 int new_size
; /* size of extents after removal */
3273 ASSERT(!(ifp
->if_flags
& XFS_IFEXTIREC
));
3274 new_size
= ifp
->if_bytes
-
3275 (ext_diff
* sizeof(xfs_bmbt_rec_t
));
3276 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3278 if (new_size
== 0) {
3279 xfs_iext_destroy(ifp
);
3282 /* Move extents up in the list (if needed) */
3283 if (idx
+ ext_diff
< nextents
) {
3284 memmove(&ifp
->if_u1
.if_extents
[idx
],
3285 &ifp
->if_u1
.if_extents
[idx
+ ext_diff
],
3286 (nextents
- (idx
+ ext_diff
)) *
3287 sizeof(xfs_bmbt_rec_t
));
3289 memset(&ifp
->if_u1
.if_extents
[nextents
- ext_diff
],
3290 0, ext_diff
* sizeof(xfs_bmbt_rec_t
));
3292 * Reallocate the direct extent list. If the extents
3293 * will fit inside the inode then xfs_iext_realloc_direct
3294 * will switch from direct to inline extent allocation
3297 xfs_iext_realloc_direct(ifp
, new_size
);
3298 ifp
->if_bytes
= new_size
;
3302 * This is called when incore extents are being removed from the
3303 * indirection array and the extents being removed span multiple extent
3304 * buffers. The idx parameter contains the file extent index where we
3305 * want to begin removing extents, and the count parameter contains
3306 * how many extents need to be removed.
3308 * |-------| |-------|
3309 * | nex1 | | | nex1 - number of extents before idx
3310 * |-------| | count |
3311 * | | | | count - number of extents being removed at idx
3312 * | count | |-------|
3313 * | | | nex2 | nex2 - number of extents after idx + count
3314 * |-------| |-------|
3317 xfs_iext_remove_indirect(
3318 xfs_ifork_t
*ifp
, /* inode fork pointer */
3319 xfs_extnum_t idx
, /* index to begin removing extents */
3320 int count
) /* number of extents to remove */
3322 xfs_ext_irec_t
*erp
; /* indirection array pointer */
3323 int erp_idx
= 0; /* indirection array index */
3324 xfs_extnum_t ext_cnt
; /* extents left to remove */
3325 xfs_extnum_t ext_diff
; /* extents to remove in current list */
3326 xfs_extnum_t nex1
; /* number of extents before idx */
3327 xfs_extnum_t nex2
; /* extents after idx + count */
3328 int page_idx
= idx
; /* index in target extent list */
3330 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3331 erp
= xfs_iext_idx_to_irec(ifp
, &page_idx
, &erp_idx
, 0);
3332 ASSERT(erp
!= NULL
);
3336 nex2
= MAX((erp
->er_extcount
- (nex1
+ ext_cnt
)), 0);
3337 ext_diff
= MIN(ext_cnt
, (erp
->er_extcount
- nex1
));
3339 * Check for deletion of entire list;
3340 * xfs_iext_irec_remove() updates extent offsets.
3342 if (ext_diff
== erp
->er_extcount
) {
3343 xfs_iext_irec_remove(ifp
, erp_idx
);
3344 ext_cnt
-= ext_diff
;
3347 ASSERT(erp_idx
< ifp
->if_real_bytes
/
3349 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3356 /* Move extents up (if needed) */
3358 memmove(&erp
->er_extbuf
[nex1
],
3359 &erp
->er_extbuf
[nex1
+ ext_diff
],
3360 nex2
* sizeof(xfs_bmbt_rec_t
));
3362 /* Zero out rest of page */
3363 memset(&erp
->er_extbuf
[nex1
+ nex2
], 0, (XFS_IEXT_BUFSZ
-
3364 ((nex1
+ nex2
) * sizeof(xfs_bmbt_rec_t
))));
3365 /* Update remaining counters */
3366 erp
->er_extcount
-= ext_diff
;
3367 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1, -ext_diff
);
3368 ext_cnt
-= ext_diff
;
3373 ifp
->if_bytes
-= count
* sizeof(xfs_bmbt_rec_t
);
3374 xfs_iext_irec_compact(ifp
);
3378 * Create, destroy, or resize a linear (direct) block of extents.
3381 xfs_iext_realloc_direct(
3382 xfs_ifork_t
*ifp
, /* inode fork pointer */
3383 int new_size
) /* new size of extents */
3385 int rnew_size
; /* real new size of extents */
3387 rnew_size
= new_size
;
3389 ASSERT(!(ifp
->if_flags
& XFS_IFEXTIREC
) ||
3390 ((new_size
>= 0) && (new_size
<= XFS_IEXT_BUFSZ
) &&
3391 (new_size
!= ifp
->if_real_bytes
)));
3393 /* Free extent records */
3394 if (new_size
== 0) {
3395 xfs_iext_destroy(ifp
);
3397 /* Resize direct extent list and zero any new bytes */
3398 else if (ifp
->if_real_bytes
) {
3399 /* Check if extents will fit inside the inode */
3400 if (new_size
<= XFS_INLINE_EXTS
* sizeof(xfs_bmbt_rec_t
)) {
3401 xfs_iext_direct_to_inline(ifp
, new_size
/
3402 (uint
)sizeof(xfs_bmbt_rec_t
));
3403 ifp
->if_bytes
= new_size
;
3406 if (!is_power_of_2(new_size
)){
3407 rnew_size
= roundup_pow_of_two(new_size
);
3409 if (rnew_size
!= ifp
->if_real_bytes
) {
3410 ifp
->if_u1
.if_extents
=
3411 kmem_realloc(ifp
->if_u1
.if_extents
,
3413 ifp
->if_real_bytes
, KM_NOFS
);
3415 if (rnew_size
> ifp
->if_real_bytes
) {
3416 memset(&ifp
->if_u1
.if_extents
[ifp
->if_bytes
/
3417 (uint
)sizeof(xfs_bmbt_rec_t
)], 0,
3418 rnew_size
- ifp
->if_real_bytes
);
3422 * Switch from the inline extent buffer to a direct
3423 * extent list. Be sure to include the inline extent
3424 * bytes in new_size.
3427 new_size
+= ifp
->if_bytes
;
3428 if (!is_power_of_2(new_size
)) {
3429 rnew_size
= roundup_pow_of_two(new_size
);
3431 xfs_iext_inline_to_direct(ifp
, rnew_size
);
3433 ifp
->if_real_bytes
= rnew_size
;
3434 ifp
->if_bytes
= new_size
;
3438 * Switch from linear (direct) extent records to inline buffer.
3441 xfs_iext_direct_to_inline(
3442 xfs_ifork_t
*ifp
, /* inode fork pointer */
3443 xfs_extnum_t nextents
) /* number of extents in file */
3445 ASSERT(ifp
->if_flags
& XFS_IFEXTENTS
);
3446 ASSERT(nextents
<= XFS_INLINE_EXTS
);
3448 * The inline buffer was zeroed when we switched
3449 * from inline to direct extent allocation mode,
3450 * so we don't need to clear it here.
3452 memcpy(ifp
->if_u2
.if_inline_ext
, ifp
->if_u1
.if_extents
,
3453 nextents
* sizeof(xfs_bmbt_rec_t
));
3454 kmem_free(ifp
->if_u1
.if_extents
);
3455 ifp
->if_u1
.if_extents
= ifp
->if_u2
.if_inline_ext
;
3456 ifp
->if_real_bytes
= 0;
3460 * Switch from inline buffer to linear (direct) extent records.
3461 * new_size should already be rounded up to the next power of 2
3462 * by the caller (when appropriate), so use new_size as it is.
3463 * However, since new_size may be rounded up, we can't update
3464 * if_bytes here. It is the caller's responsibility to update
3465 * if_bytes upon return.
3468 xfs_iext_inline_to_direct(
3469 xfs_ifork_t
*ifp
, /* inode fork pointer */
3470 int new_size
) /* number of extents in file */
3472 ifp
->if_u1
.if_extents
= kmem_alloc(new_size
, KM_NOFS
);
3473 memset(ifp
->if_u1
.if_extents
, 0, new_size
);
3474 if (ifp
->if_bytes
) {
3475 memcpy(ifp
->if_u1
.if_extents
, ifp
->if_u2
.if_inline_ext
,
3477 memset(ifp
->if_u2
.if_inline_ext
, 0, XFS_INLINE_EXTS
*
3478 sizeof(xfs_bmbt_rec_t
));
3480 ifp
->if_real_bytes
= new_size
;
3484 * Resize an extent indirection array to new_size bytes.
3487 xfs_iext_realloc_indirect(
3488 xfs_ifork_t
*ifp
, /* inode fork pointer */
3489 int new_size
) /* new indirection array size */
3491 int nlists
; /* number of irec's (ex lists) */
3492 int size
; /* current indirection array size */
3494 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3495 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3496 size
= nlists
* sizeof(xfs_ext_irec_t
);
3497 ASSERT(ifp
->if_real_bytes
);
3498 ASSERT((new_size
>= 0) && (new_size
!= size
));
3499 if (new_size
== 0) {
3500 xfs_iext_destroy(ifp
);
3502 ifp
->if_u1
.if_ext_irec
= (xfs_ext_irec_t
*)
3503 kmem_realloc(ifp
->if_u1
.if_ext_irec
,
3504 new_size
, size
, KM_NOFS
);
3509 * Switch from indirection array to linear (direct) extent allocations.
3512 xfs_iext_indirect_to_direct(
3513 xfs_ifork_t
*ifp
) /* inode fork pointer */
3515 xfs_bmbt_rec_host_t
*ep
; /* extent record pointer */
3516 xfs_extnum_t nextents
; /* number of extents in file */
3517 int size
; /* size of file extents */
3519 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3520 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3521 ASSERT(nextents
<= XFS_LINEAR_EXTS
);
3522 size
= nextents
* sizeof(xfs_bmbt_rec_t
);
3524 xfs_iext_irec_compact_pages(ifp
);
3525 ASSERT(ifp
->if_real_bytes
== XFS_IEXT_BUFSZ
);
3527 ep
= ifp
->if_u1
.if_ext_irec
->er_extbuf
;
3528 kmem_free(ifp
->if_u1
.if_ext_irec
);
3529 ifp
->if_flags
&= ~XFS_IFEXTIREC
;
3530 ifp
->if_u1
.if_extents
= ep
;
3531 ifp
->if_bytes
= size
;
3532 if (nextents
< XFS_LINEAR_EXTS
) {
3533 xfs_iext_realloc_direct(ifp
, size
);
3538 * Free incore file extents.
3542 xfs_ifork_t
*ifp
) /* inode fork pointer */
3544 if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3548 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3549 for (erp_idx
= nlists
- 1; erp_idx
>= 0 ; erp_idx
--) {
3550 xfs_iext_irec_remove(ifp
, erp_idx
);
3552 ifp
->if_flags
&= ~XFS_IFEXTIREC
;
3553 } else if (ifp
->if_real_bytes
) {
3554 kmem_free(ifp
->if_u1
.if_extents
);
3555 } else if (ifp
->if_bytes
) {
3556 memset(ifp
->if_u2
.if_inline_ext
, 0, XFS_INLINE_EXTS
*
3557 sizeof(xfs_bmbt_rec_t
));
3559 ifp
->if_u1
.if_extents
= NULL
;
3560 ifp
->if_real_bytes
= 0;
3565 * Return a pointer to the extent record for file system block bno.
3567 xfs_bmbt_rec_host_t
* /* pointer to found extent record */
3568 xfs_iext_bno_to_ext(
3569 xfs_ifork_t
*ifp
, /* inode fork pointer */
3570 xfs_fileoff_t bno
, /* block number to search for */
3571 xfs_extnum_t
*idxp
) /* index of target extent */
3573 xfs_bmbt_rec_host_t
*base
; /* pointer to first extent */
3574 xfs_filblks_t blockcount
= 0; /* number of blocks in extent */
3575 xfs_bmbt_rec_host_t
*ep
= NULL
; /* pointer to target extent */
3576 xfs_ext_irec_t
*erp
= NULL
; /* indirection array pointer */
3577 int high
; /* upper boundary in search */
3578 xfs_extnum_t idx
= 0; /* index of target extent */
3579 int low
; /* lower boundary in search */
3580 xfs_extnum_t nextents
; /* number of file extents */
3581 xfs_fileoff_t startoff
= 0; /* start offset of extent */
3583 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3584 if (nextents
== 0) {
3589 if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3590 /* Find target extent list */
3592 erp
= xfs_iext_bno_to_irec(ifp
, bno
, &erp_idx
);
3593 base
= erp
->er_extbuf
;
3594 high
= erp
->er_extcount
- 1;
3596 base
= ifp
->if_u1
.if_extents
;
3597 high
= nextents
- 1;
3599 /* Binary search extent records */
3600 while (low
<= high
) {
3601 idx
= (low
+ high
) >> 1;
3603 startoff
= xfs_bmbt_get_startoff(ep
);
3604 blockcount
= xfs_bmbt_get_blockcount(ep
);
3605 if (bno
< startoff
) {
3607 } else if (bno
>= startoff
+ blockcount
) {
3610 /* Convert back to file-based extent index */
3611 if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3612 idx
+= erp
->er_extoff
;
3618 /* Convert back to file-based extent index */
3619 if (ifp
->if_flags
& XFS_IFEXTIREC
) {
3620 idx
+= erp
->er_extoff
;
3622 if (bno
>= startoff
+ blockcount
) {
3623 if (++idx
== nextents
) {
3626 ep
= xfs_iext_get_ext(ifp
, idx
);
3634 * Return a pointer to the indirection array entry containing the
3635 * extent record for filesystem block bno. Store the index of the
3636 * target irec in *erp_idxp.
3638 xfs_ext_irec_t
* /* pointer to found extent record */
3639 xfs_iext_bno_to_irec(
3640 xfs_ifork_t
*ifp
, /* inode fork pointer */
3641 xfs_fileoff_t bno
, /* block number to search for */
3642 int *erp_idxp
) /* irec index of target ext list */
3644 xfs_ext_irec_t
*erp
= NULL
; /* indirection array pointer */
3645 xfs_ext_irec_t
*erp_next
; /* next indirection array entry */
3646 int erp_idx
; /* indirection array index */
3647 int nlists
; /* number of extent irec's (lists) */
3648 int high
; /* binary search upper limit */
3649 int low
; /* binary search lower limit */
3651 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3652 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3656 while (low
<= high
) {
3657 erp_idx
= (low
+ high
) >> 1;
3658 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3659 erp_next
= erp_idx
< nlists
- 1 ? erp
+ 1 : NULL
;
3660 if (bno
< xfs_bmbt_get_startoff(erp
->er_extbuf
)) {
3662 } else if (erp_next
&& bno
>=
3663 xfs_bmbt_get_startoff(erp_next
->er_extbuf
)) {
3669 *erp_idxp
= erp_idx
;
3674 * Return a pointer to the indirection array entry containing the
3675 * extent record at file extent index *idxp. Store the index of the
3676 * target irec in *erp_idxp and store the page index of the target
3677 * extent record in *idxp.
3680 xfs_iext_idx_to_irec(
3681 xfs_ifork_t
*ifp
, /* inode fork pointer */
3682 xfs_extnum_t
*idxp
, /* extent index (file -> page) */
3683 int *erp_idxp
, /* pointer to target irec */
3684 int realloc
) /* new bytes were just added */
3686 xfs_ext_irec_t
*prev
; /* pointer to previous irec */
3687 xfs_ext_irec_t
*erp
= NULL
; /* pointer to current irec */
3688 int erp_idx
; /* indirection array index */
3689 int nlists
; /* number of irec's (ex lists) */
3690 int high
; /* binary search upper limit */
3691 int low
; /* binary search lower limit */
3692 xfs_extnum_t page_idx
= *idxp
; /* extent index in target list */
3694 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3695 ASSERT(page_idx
>= 0);
3696 ASSERT(page_idx
<= ifp
->if_bytes
/ sizeof(xfs_bmbt_rec_t
));
3697 ASSERT(page_idx
< ifp
->if_bytes
/ sizeof(xfs_bmbt_rec_t
) || realloc
);
3699 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3704 /* Binary search extent irec's */
3705 while (low
<= high
) {
3706 erp_idx
= (low
+ high
) >> 1;
3707 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3708 prev
= erp_idx
> 0 ? erp
- 1 : NULL
;
3709 if (page_idx
< erp
->er_extoff
|| (page_idx
== erp
->er_extoff
&&
3710 realloc
&& prev
&& prev
->er_extcount
< XFS_LINEAR_EXTS
)) {
3712 } else if (page_idx
> erp
->er_extoff
+ erp
->er_extcount
||
3713 (page_idx
== erp
->er_extoff
+ erp
->er_extcount
&&
3716 } else if (page_idx
== erp
->er_extoff
+ erp
->er_extcount
&&
3717 erp
->er_extcount
== XFS_LINEAR_EXTS
) {
3721 erp
= erp_idx
< nlists
? erp
+ 1 : NULL
;
3724 page_idx
-= erp
->er_extoff
;
3729 *erp_idxp
= erp_idx
;
3734 * Allocate and initialize an indirection array once the space needed
3735 * for incore extents increases above XFS_IEXT_BUFSZ.
3739 xfs_ifork_t
*ifp
) /* inode fork pointer */
3741 xfs_ext_irec_t
*erp
; /* indirection array pointer */
3742 xfs_extnum_t nextents
; /* number of extents in file */
3744 ASSERT(!(ifp
->if_flags
& XFS_IFEXTIREC
));
3745 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3746 ASSERT(nextents
<= XFS_LINEAR_EXTS
);
3748 erp
= kmem_alloc(sizeof(xfs_ext_irec_t
), KM_NOFS
);
3750 if (nextents
== 0) {
3751 ifp
->if_u1
.if_extents
= kmem_alloc(XFS_IEXT_BUFSZ
, KM_NOFS
);
3752 } else if (!ifp
->if_real_bytes
) {
3753 xfs_iext_inline_to_direct(ifp
, XFS_IEXT_BUFSZ
);
3754 } else if (ifp
->if_real_bytes
< XFS_IEXT_BUFSZ
) {
3755 xfs_iext_realloc_direct(ifp
, XFS_IEXT_BUFSZ
);
3757 erp
->er_extbuf
= ifp
->if_u1
.if_extents
;
3758 erp
->er_extcount
= nextents
;
3761 ifp
->if_flags
|= XFS_IFEXTIREC
;
3762 ifp
->if_real_bytes
= XFS_IEXT_BUFSZ
;
3763 ifp
->if_bytes
= nextents
* sizeof(xfs_bmbt_rec_t
);
3764 ifp
->if_u1
.if_ext_irec
= erp
;
3770 * Allocate and initialize a new entry in the indirection array.
3774 xfs_ifork_t
*ifp
, /* inode fork pointer */
3775 int erp_idx
) /* index for new irec */
3777 xfs_ext_irec_t
*erp
; /* indirection array pointer */
3778 int i
; /* loop counter */
3779 int nlists
; /* number of irec's (ex lists) */
3781 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3782 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3784 /* Resize indirection array */
3785 xfs_iext_realloc_indirect(ifp
, ++nlists
*
3786 sizeof(xfs_ext_irec_t
));
3788 * Move records down in the array so the
3789 * new page can use erp_idx.
3791 erp
= ifp
->if_u1
.if_ext_irec
;
3792 for (i
= nlists
- 1; i
> erp_idx
; i
--) {
3793 memmove(&erp
[i
], &erp
[i
-1], sizeof(xfs_ext_irec_t
));
3795 ASSERT(i
== erp_idx
);
3797 /* Initialize new extent record */
3798 erp
= ifp
->if_u1
.if_ext_irec
;
3799 erp
[erp_idx
].er_extbuf
= kmem_alloc(XFS_IEXT_BUFSZ
, KM_NOFS
);
3800 ifp
->if_real_bytes
= nlists
* XFS_IEXT_BUFSZ
;
3801 memset(erp
[erp_idx
].er_extbuf
, 0, XFS_IEXT_BUFSZ
);
3802 erp
[erp_idx
].er_extcount
= 0;
3803 erp
[erp_idx
].er_extoff
= erp_idx
> 0 ?
3804 erp
[erp_idx
-1].er_extoff
+ erp
[erp_idx
-1].er_extcount
: 0;
3805 return (&erp
[erp_idx
]);
3809 * Remove a record from the indirection array.
3812 xfs_iext_irec_remove(
3813 xfs_ifork_t
*ifp
, /* inode fork pointer */
3814 int erp_idx
) /* irec index to remove */
3816 xfs_ext_irec_t
*erp
; /* indirection array pointer */
3817 int i
; /* loop counter */
3818 int nlists
; /* number of irec's (ex lists) */
3820 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3821 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3822 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3823 if (erp
->er_extbuf
) {
3824 xfs_iext_irec_update_extoffs(ifp
, erp_idx
+ 1,
3826 kmem_free(erp
->er_extbuf
);
3828 /* Compact extent records */
3829 erp
= ifp
->if_u1
.if_ext_irec
;
3830 for (i
= erp_idx
; i
< nlists
- 1; i
++) {
3831 memmove(&erp
[i
], &erp
[i
+1], sizeof(xfs_ext_irec_t
));
3834 * Manually free the last extent record from the indirection
3835 * array. A call to xfs_iext_realloc_indirect() with a size
3836 * of zero would result in a call to xfs_iext_destroy() which
3837 * would in turn call this function again, creating a nasty
3841 xfs_iext_realloc_indirect(ifp
,
3842 nlists
* sizeof(xfs_ext_irec_t
));
3844 kmem_free(ifp
->if_u1
.if_ext_irec
);
3846 ifp
->if_real_bytes
= nlists
* XFS_IEXT_BUFSZ
;
3850 * This is called to clean up large amounts of unused memory allocated
3851 * by the indirection array. Before compacting anything though, verify
3852 * that the indirection array is still needed and switch back to the
3853 * linear extent list (or even the inline buffer) if possible. The
3854 * compaction policy is as follows:
3856 * Full Compaction: Extents fit into a single page (or inline buffer)
3857 * Partial Compaction: Extents occupy less than 50% of allocated space
3858 * No Compaction: Extents occupy at least 50% of allocated space
3861 xfs_iext_irec_compact(
3862 xfs_ifork_t
*ifp
) /* inode fork pointer */
3864 xfs_extnum_t nextents
; /* number of extents in file */
3865 int nlists
; /* number of irec's (ex lists) */
3867 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3868 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3869 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
3871 if (nextents
== 0) {
3872 xfs_iext_destroy(ifp
);
3873 } else if (nextents
<= XFS_INLINE_EXTS
) {
3874 xfs_iext_indirect_to_direct(ifp
);
3875 xfs_iext_direct_to_inline(ifp
, nextents
);
3876 } else if (nextents
<= XFS_LINEAR_EXTS
) {
3877 xfs_iext_indirect_to_direct(ifp
);
3878 } else if (nextents
< (nlists
* XFS_LINEAR_EXTS
) >> 1) {
3879 xfs_iext_irec_compact_pages(ifp
);
3884 * Combine extents from neighboring extent pages.
3887 xfs_iext_irec_compact_pages(
3888 xfs_ifork_t
*ifp
) /* inode fork pointer */
3890 xfs_ext_irec_t
*erp
, *erp_next
;/* pointers to irec entries */
3891 int erp_idx
= 0; /* indirection array index */
3892 int nlists
; /* number of irec's (ex lists) */
3894 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3895 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3896 while (erp_idx
< nlists
- 1) {
3897 erp
= &ifp
->if_u1
.if_ext_irec
[erp_idx
];
3899 if (erp_next
->er_extcount
<=
3900 (XFS_LINEAR_EXTS
- erp
->er_extcount
)) {
3901 memcpy(&erp
->er_extbuf
[erp
->er_extcount
],
3902 erp_next
->er_extbuf
, erp_next
->er_extcount
*
3903 sizeof(xfs_bmbt_rec_t
));
3904 erp
->er_extcount
+= erp_next
->er_extcount
;
3906 * Free page before removing extent record
3907 * so er_extoffs don't get modified in
3908 * xfs_iext_irec_remove.
3910 kmem_free(erp_next
->er_extbuf
);
3911 erp_next
->er_extbuf
= NULL
;
3912 xfs_iext_irec_remove(ifp
, erp_idx
+ 1);
3913 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3921 * This is called to update the er_extoff field in the indirection
3922 * array when extents have been added or removed from one of the
3923 * extent lists. erp_idx contains the irec index to begin updating
3924 * at and ext_diff contains the number of extents that were added
3928 xfs_iext_irec_update_extoffs(
3929 xfs_ifork_t
*ifp
, /* inode fork pointer */
3930 int erp_idx
, /* irec index to update */
3931 int ext_diff
) /* number of new extents */
3933 int i
; /* loop counter */
3934 int nlists
; /* number of irec's (ex lists */
3936 ASSERT(ifp
->if_flags
& XFS_IFEXTIREC
);
3937 nlists
= ifp
->if_real_bytes
/ XFS_IEXT_BUFSZ
;
3938 for (i
= erp_idx
; i
< nlists
; i
++) {
3939 ifp
->if_u1
.if_ext_irec
[i
].er_extoff
+= ext_diff
;
3944 * Test whether it is appropriate to check an inode for and free post EOF
3945 * blocks. The 'force' parameter determines whether we should also consider
3946 * regular files that are marked preallocated or append-only.
3949 xfs_can_free_eofblocks(struct xfs_inode
*ip
, bool force
)
3951 /* prealloc/delalloc exists only on regular files */
3952 if (!S_ISREG(ip
->i_d
.di_mode
))
3956 * Zero sized files with no cached pages and delalloc blocks will not
3957 * have speculative prealloc/delalloc blocks to remove.
3959 if (VFS_I(ip
)->i_size
== 0 &&
3960 VN_CACHED(VFS_I(ip
)) == 0 &&
3961 ip
->i_delayed_blks
== 0)
3964 /* If we haven't read in the extent list, then don't do it now. */
3965 if (!(ip
->i_df
.if_flags
& XFS_IFEXTENTS
))
3969 * Do not free real preallocated or append-only files unless the file
3970 * has delalloc blocks and we are forced to remove them.
3972 if (ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
| XFS_DIFLAG_APPEND
))
3973 if (!force
|| ip
->i_delayed_blks
== 0)