2 * Copyright (C) International Business Machines Corp., 2000-2004
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the 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 to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * jfs_imap.c: inode allocation map manager
23 * Each AG has a simple lock which is used to control the serialization of
24 * the AG level lists. This lock should be taken first whenever an AG
25 * level list will be modified or accessed.
27 * Each IAG is locked by obtaining the buffer for the IAG page.
29 * There is also a inode lock for the inode map inode. A read lock needs to
30 * be taken whenever an IAG is read from the map or the global level
31 * information is read. A write lock needs to be taken whenever the global
32 * level information is modified or an atomic operation needs to be used.
34 * If more than one IAG is read at one time, the read lock may not
35 * be given up until all of the IAG's are read. Otherwise, a deadlock
36 * may occur when trying to obtain the read lock while another thread
37 * holding the read lock is waiting on the IAG already being held.
39 * The control page of the inode map is read into memory by diMount().
40 * Thereafter it should only be modified in memory and then it will be
41 * written out when the filesystem is unmounted by diUnmount().
45 #include <linux/buffer_head.h>
46 #include <linux/pagemap.h>
47 #include <linux/quotaops.h>
49 #include "jfs_incore.h"
50 #include "jfs_inode.h"
51 #include "jfs_filsys.h"
52 #include "jfs_dinode.h"
55 #include "jfs_metapage.h"
56 #include "jfs_superblock.h"
57 #include "jfs_debug.h"
60 * __mark_inode_dirty expects inodes to be hashed. Since we don't want
61 * special inodes in the fileset inode space, we hash them to a dummy head
63 static HLIST_HEAD(aggregate_hash
);
68 /* iag free list lock */
69 #define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock)
70 #define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock)
71 #define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock)
73 /* per ag iag list locks */
74 #define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index]))
75 #define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno])
76 #define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno])
81 static int diAllocAG(struct inomap
*, int, bool, struct inode
*);
82 static int diAllocAny(struct inomap
*, int, bool, struct inode
*);
83 static int diAllocBit(struct inomap
*, struct iag
*, int);
84 static int diAllocExt(struct inomap
*, int, struct inode
*);
85 static int diAllocIno(struct inomap
*, int, struct inode
*);
86 static int diFindFree(u32
, int);
87 static int diNewExt(struct inomap
*, struct iag
*, int);
88 static int diNewIAG(struct inomap
*, int *, int, struct metapage
**);
89 static void duplicateIXtree(struct super_block
*, s64
, int, s64
*);
91 static int diIAGRead(struct inomap
* imap
, int, struct metapage
**);
92 static int copy_from_dinode(struct dinode
*, struct inode
*);
93 static void copy_to_dinode(struct dinode
*, struct inode
*);
98 * FUNCTION: initialize the incore inode map control structures for
99 * a fileset or aggregate init time.
101 * the inode map's control structure (dinomap) is
102 * brought in from disk and placed in virtual memory.
105 * ipimap - pointer to inode map inode for the aggregate or fileset.
109 * -ENOMEM - insufficient free virtual memory.
112 int diMount(struct inode
*ipimap
)
117 struct dinomap_disk
*dinom_le
;
120 * allocate/initialize the in-memory inode map control structure
122 /* allocate the in-memory inode map control structure. */
123 imap
= kmalloc(sizeof(struct inomap
), GFP_KERNEL
);
125 jfs_err("diMount: kmalloc returned NULL!");
129 /* read the on-disk inode map control structure. */
131 mp
= read_metapage(ipimap
,
132 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
139 /* copy the on-disk version to the in-memory version. */
140 dinom_le
= (struct dinomap_disk
*) mp
->data
;
141 imap
->im_freeiag
= le32_to_cpu(dinom_le
->in_freeiag
);
142 imap
->im_nextiag
= le32_to_cpu(dinom_le
->in_nextiag
);
143 atomic_set(&imap
->im_numinos
, le32_to_cpu(dinom_le
->in_numinos
));
144 atomic_set(&imap
->im_numfree
, le32_to_cpu(dinom_le
->in_numfree
));
145 imap
->im_nbperiext
= le32_to_cpu(dinom_le
->in_nbperiext
);
146 imap
->im_l2nbperiext
= le32_to_cpu(dinom_le
->in_l2nbperiext
);
147 for (index
= 0; index
< MAXAG
; index
++) {
148 imap
->im_agctl
[index
].inofree
=
149 le32_to_cpu(dinom_le
->in_agctl
[index
].inofree
);
150 imap
->im_agctl
[index
].extfree
=
151 le32_to_cpu(dinom_le
->in_agctl
[index
].extfree
);
152 imap
->im_agctl
[index
].numinos
=
153 le32_to_cpu(dinom_le
->in_agctl
[index
].numinos
);
154 imap
->im_agctl
[index
].numfree
=
155 le32_to_cpu(dinom_le
->in_agctl
[index
].numfree
);
158 /* release the buffer. */
159 release_metapage(mp
);
162 * allocate/initialize inode allocation map locks
164 /* allocate and init iag free list lock */
165 IAGFREE_LOCK_INIT(imap
);
167 /* allocate and init ag list locks */
168 for (index
= 0; index
< MAXAG
; index
++) {
169 AG_LOCK_INIT(imap
, index
);
172 /* bind the inode map inode and inode map control structure
175 imap
->im_ipimap
= ipimap
;
176 JFS_IP(ipimap
)->i_imap
= imap
;
185 * FUNCTION: write to disk the incore inode map control structures for
186 * a fileset or aggregate at unmount time.
189 * ipimap - pointer to inode map inode for the aggregate or fileset.
193 * -ENOMEM - insufficient free virtual memory.
196 int diUnmount(struct inode
*ipimap
, int mounterror
)
198 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
201 * update the on-disk inode map control structure
204 if (!(mounterror
|| isReadOnly(ipimap
)))
208 * Invalidate the page cache buffers
210 truncate_inode_pages(ipimap
->i_mapping
, 0);
213 * free in-memory control structure
224 int diSync(struct inode
*ipimap
)
226 struct dinomap_disk
*dinom_le
;
227 struct inomap
*imp
= JFS_IP(ipimap
)->i_imap
;
232 * write imap global conrol page
234 /* read the on-disk inode map control structure */
235 mp
= get_metapage(ipimap
,
236 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
239 jfs_err("diSync: get_metapage failed!");
243 /* copy the in-memory version to the on-disk version */
244 dinom_le
= (struct dinomap_disk
*) mp
->data
;
245 dinom_le
->in_freeiag
= cpu_to_le32(imp
->im_freeiag
);
246 dinom_le
->in_nextiag
= cpu_to_le32(imp
->im_nextiag
);
247 dinom_le
->in_numinos
= cpu_to_le32(atomic_read(&imp
->im_numinos
));
248 dinom_le
->in_numfree
= cpu_to_le32(atomic_read(&imp
->im_numfree
));
249 dinom_le
->in_nbperiext
= cpu_to_le32(imp
->im_nbperiext
);
250 dinom_le
->in_l2nbperiext
= cpu_to_le32(imp
->im_l2nbperiext
);
251 for (index
= 0; index
< MAXAG
; index
++) {
252 dinom_le
->in_agctl
[index
].inofree
=
253 cpu_to_le32(imp
->im_agctl
[index
].inofree
);
254 dinom_le
->in_agctl
[index
].extfree
=
255 cpu_to_le32(imp
->im_agctl
[index
].extfree
);
256 dinom_le
->in_agctl
[index
].numinos
=
257 cpu_to_le32(imp
->im_agctl
[index
].numinos
);
258 dinom_le
->in_agctl
[index
].numfree
=
259 cpu_to_le32(imp
->im_agctl
[index
].numfree
);
262 /* write out the control structure */
266 * write out dirty pages of imap
268 filemap_write_and_wait(ipimap
->i_mapping
);
270 diWriteSpecial(ipimap
, 0);
279 * FUNCTION: initialize an incore inode from disk.
281 * on entry, the specifed incore inode should itself
282 * specify the disk inode number corresponding to the
283 * incore inode (i.e. i_number should be initialized).
285 * this routine handles incore inode initialization for
286 * both "special" and "regular" inodes. special inodes
287 * are those required early in the mount process and
288 * require special handling since much of the file system
289 * is not yet initialized. these "special" inodes are
290 * identified by a NULL inode map inode pointer and are
291 * actually initialized by a call to diReadSpecial().
293 * for regular inodes, the iag describing the disk inode
294 * is read from disk to determine the inode extent address
295 * for the disk inode. with the inode extent address in
296 * hand, the page of the extent that contains the disk
297 * inode is read and the disk inode is copied to the
301 * ip - pointer to incore inode to be initialized from disk.
306 * -ENOMEM - insufficient memory
309 int diRead(struct inode
*ip
)
311 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
312 int iagno
, ino
, extno
, rc
;
313 struct inode
*ipimap
;
321 unsigned long pageno
;
324 jfs_info("diRead: ino = %ld", ip
->i_ino
);
326 ipimap
= sbi
->ipimap
;
327 JFS_IP(ip
)->ipimap
= ipimap
;
329 /* determine the iag number for this inode (number) */
330 iagno
= INOTOIAG(ip
->i_ino
);
333 imap
= JFS_IP(ipimap
)->i_imap
;
334 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
335 rc
= diIAGRead(imap
, iagno
, &mp
);
336 IREAD_UNLOCK(ipimap
);
338 jfs_err("diRead: diIAGRead returned %d", rc
);
342 iagp
= (struct iag
*) mp
->data
;
344 /* determine inode extent that holds the disk inode */
345 ino
= ip
->i_ino
& (INOSPERIAG
- 1);
346 extno
= ino
>> L2INOSPEREXT
;
348 if ((lengthPXD(&iagp
->inoext
[extno
]) != imap
->im_nbperiext
) ||
349 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
350 release_metapage(mp
);
354 /* get disk block number of the page within the inode extent
355 * that holds the disk inode.
357 blkno
= INOPBLK(&iagp
->inoext
[extno
], ino
, sbi
->l2nbperpage
);
359 /* get the ag for the iag */
360 agstart
= le64_to_cpu(iagp
->agstart
);
362 release_metapage(mp
);
364 rel_inode
= (ino
& (INOSPERPAGE
- 1));
365 pageno
= blkno
>> sbi
->l2nbperpage
;
367 if ((block_offset
= ((u32
) blkno
& (sbi
->nbperpage
- 1)))) {
369 * OS/2 didn't always align inode extents on page boundaries
372 (sbi
->nbperpage
- block_offset
) << sbi
->l2niperblk
;
374 if (rel_inode
< inodes_left
)
375 rel_inode
+= block_offset
<< sbi
->l2niperblk
;
378 rel_inode
-= inodes_left
;
382 /* read the page of disk inode */
383 mp
= read_metapage(ipimap
, pageno
<< sbi
->l2nbperpage
, PSIZE
, 1);
385 jfs_err("diRead: read_metapage failed");
389 /* locate the disk inode requested */
390 dp
= (struct dinode
*) mp
->data
;
393 if (ip
->i_ino
!= le32_to_cpu(dp
->di_number
)) {
394 jfs_error(ip
->i_sb
, "diRead: i_ino != di_number");
396 } else if (le32_to_cpu(dp
->di_nlink
) == 0)
399 /* copy the disk inode to the in-memory inode */
400 rc
= copy_from_dinode(dp
, ip
);
402 release_metapage(mp
);
404 /* set the ag for the inode */
405 JFS_IP(ip
)->agno
= BLKTOAG(agstart
, sbi
);
406 JFS_IP(ip
)->active_ag
= -1;
413 * NAME: diReadSpecial()
415 * FUNCTION: initialize a 'special' inode from disk.
417 * this routines handles aggregate level inodes. The
418 * inode cache cannot differentiate between the
419 * aggregate inodes and the filesystem inodes, so we
420 * handle these here. We don't actually use the aggregate
421 * inode map, since these inodes are at a fixed location
422 * and in some cases the aggregate inode map isn't initialized
426 * sb - filesystem superblock
427 * inum - aggregate inode number
428 * secondary - 1 if secondary aggregate inode table
431 * new inode - success
434 struct inode
*diReadSpecial(struct super_block
*sb
, ino_t inum
, int secondary
)
436 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
444 jfs_err("diReadSpecial: new_inode returned NULL!");
449 address
= addressPXD(&sbi
->ait2
) >> sbi
->l2nbperpage
;
450 JFS_IP(ip
)->ipimap
= sbi
->ipaimap2
;
452 address
= AITBL_OFF
>> L2PSIZE
;
453 JFS_IP(ip
)->ipimap
= sbi
->ipaimap
;
456 ASSERT(inum
< INOSPEREXT
);
460 address
+= inum
>> 3; /* 8 inodes per 4K page */
462 /* read the page of fixed disk inode (AIT) in raw mode */
463 mp
= read_metapage(ip
, address
<< sbi
->l2nbperpage
, PSIZE
, 1);
465 ip
->i_nlink
= 1; /* Don't want iput() deleting it */
470 /* get the pointer to the disk inode of interest */
471 dp
= (struct dinode
*) (mp
->data
);
472 dp
+= inum
% 8; /* 8 inodes per 4K page */
474 /* copy on-disk inode to in-memory inode */
475 if ((copy_from_dinode(dp
, ip
)) != 0) {
476 /* handle bad return by returning NULL for ip */
477 ip
->i_nlink
= 1; /* Don't want iput() deleting it */
479 /* release the page */
480 release_metapage(mp
);
485 ip
->i_mapping
->a_ops
= &jfs_metapage_aops
;
486 mapping_set_gfp_mask(ip
->i_mapping
, GFP_NOFS
);
488 /* Allocations to metadata inodes should not affect quotas */
489 ip
->i_flags
|= S_NOQUOTA
;
491 if ((inum
== FILESYSTEM_I
) && (JFS_IP(ip
)->ipimap
== sbi
->ipaimap
)) {
492 sbi
->gengen
= le32_to_cpu(dp
->di_gengen
);
493 sbi
->inostamp
= le32_to_cpu(dp
->di_inostamp
);
496 /* release the page */
497 release_metapage(mp
);
499 hlist_add_head(&ip
->i_hash
, &aggregate_hash
);
505 * NAME: diWriteSpecial()
507 * FUNCTION: Write the special inode to disk
511 * secondary - 1 if secondary aggregate inode table
513 * RETURN VALUES: none
516 void diWriteSpecial(struct inode
*ip
, int secondary
)
518 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
521 ino_t inum
= ip
->i_ino
;
525 address
= addressPXD(&sbi
->ait2
) >> sbi
->l2nbperpage
;
527 address
= AITBL_OFF
>> L2PSIZE
;
529 ASSERT(inum
< INOSPEREXT
);
531 address
+= inum
>> 3; /* 8 inodes per 4K page */
533 /* read the page of fixed disk inode (AIT) in raw mode */
534 mp
= read_metapage(ip
, address
<< sbi
->l2nbperpage
, PSIZE
, 1);
536 jfs_err("diWriteSpecial: failed to read aggregate inode "
541 /* get the pointer to the disk inode of interest */
542 dp
= (struct dinode
*) (mp
->data
);
543 dp
+= inum
% 8; /* 8 inodes per 4K page */
545 /* copy on-disk inode to in-memory inode */
546 copy_to_dinode(dp
, ip
);
547 memcpy(&dp
->di_xtroot
, &JFS_IP(ip
)->i_xtroot
, 288);
549 if (inum
== FILESYSTEM_I
)
550 dp
->di_gengen
= cpu_to_le32(sbi
->gengen
);
557 * NAME: diFreeSpecial()
559 * FUNCTION: Free allocated space for special inode
561 void diFreeSpecial(struct inode
*ip
)
564 jfs_err("diFreeSpecial called with NULL ip!");
567 filemap_write_and_wait(ip
->i_mapping
);
568 truncate_inode_pages(ip
->i_mapping
, 0);
577 * FUNCTION: write the on-disk inode portion of the in-memory inode
578 * to its corresponding on-disk inode.
580 * on entry, the specifed incore inode should itself
581 * specify the disk inode number corresponding to the
582 * incore inode (i.e. i_number should be initialized).
584 * the inode contains the inode extent address for the disk
585 * inode. with the inode extent address in hand, the
586 * page of the extent that contains the disk inode is
587 * read and the disk inode portion of the incore inode
588 * is copied to the disk inode.
591 * tid - transacation id
592 * ip - pointer to incore inode to be written to the inode extent.
598 int diWrite(tid_t tid
, struct inode
*ip
)
600 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
601 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
609 unsigned long pageno
;
612 struct inode
*ipimap
;
615 struct tlock
*ditlck
, *tlck
;
616 struct linelock
*dilinelock
, *ilinelock
;
620 ipimap
= jfs_ip
->ipimap
;
622 ino
= ip
->i_ino
& (INOSPERIAG
- 1);
624 if (!addressPXD(&(jfs_ip
->ixpxd
)) ||
625 (lengthPXD(&(jfs_ip
->ixpxd
)) !=
626 JFS_IP(ipimap
)->i_imap
->im_nbperiext
)) {
627 jfs_error(ip
->i_sb
, "diWrite: ixpxd invalid");
632 * read the page of disk inode containing the specified inode:
634 /* compute the block address of the page */
635 blkno
= INOPBLK(&(jfs_ip
->ixpxd
), ino
, sbi
->l2nbperpage
);
637 rel_inode
= (ino
& (INOSPERPAGE
- 1));
638 pageno
= blkno
>> sbi
->l2nbperpage
;
640 if ((block_offset
= ((u32
) blkno
& (sbi
->nbperpage
- 1)))) {
642 * OS/2 didn't always align inode extents on page boundaries
645 (sbi
->nbperpage
- block_offset
) << sbi
->l2niperblk
;
647 if (rel_inode
< inodes_left
)
648 rel_inode
+= block_offset
<< sbi
->l2niperblk
;
651 rel_inode
-= inodes_left
;
654 /* read the page of disk inode */
656 mp
= read_metapage(ipimap
, pageno
<< sbi
->l2nbperpage
, PSIZE
, 1);
660 /* get the pointer to the disk inode */
661 dp
= (struct dinode
*) mp
->data
;
664 dioffset
= (ino
& (INOSPERPAGE
- 1)) << L2DISIZE
;
667 * acquire transaction lock on the on-disk inode;
668 * N.B. tlock is acquired on ipimap not ip;
671 txLock(tid
, ipimap
, mp
, tlckINODE
| tlckENTRY
)) == NULL
)
673 dilinelock
= (struct linelock
*) & ditlck
->lock
;
676 * copy btree root from in-memory inode to on-disk inode
678 * (tlock is taken from inline B+-tree root in in-memory
679 * inode when the B+-tree root is updated, which is pointed
680 * by jfs_ip->blid as well as being on tx tlock list)
682 * further processing of btree root is based on the copy
683 * in in-memory inode, where txLog() will log from, and,
684 * for xtree root, txUpdateMap() will update map and reset
688 if (S_ISDIR(ip
->i_mode
) && (lid
= jfs_ip
->xtlid
)) {
690 * This is the special xtree inside the directory for storing
691 * the directory table
697 tlck
= lid_to_tlock(lid
);
698 assert(tlck
->type
& tlckXTREE
);
699 tlck
->type
|= tlckBTROOT
;
701 ilinelock
= (struct linelock
*) & tlck
->lock
;
704 * copy xtree root from inode to dinode:
706 p
= &jfs_ip
->i_xtroot
;
707 xp
= (xtpage_t
*) &dp
->di_dirtable
;
709 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
710 memcpy(&xp
->xad
[lv
->offset
], &p
->xad
[lv
->offset
],
711 lv
->length
<< L2XTSLOTSIZE
);
714 /* reset on-disk (metadata page) xtree XAD_NEW bit */
715 xad
= &xp
->xad
[XTENTRYSTART
];
716 for (n
= XTENTRYSTART
;
717 n
< le16_to_cpu(xp
->header
.nextindex
); n
++, xad
++)
718 if (xad
->flag
& (XAD_NEW
| XAD_EXTENDED
))
719 xad
->flag
&= ~(XAD_NEW
| XAD_EXTENDED
);
722 if ((lid
= jfs_ip
->blid
) == 0)
726 tlck
= lid_to_tlock(lid
);
728 tlck
->type
|= tlckBTROOT
;
730 ilinelock
= (struct linelock
*) & tlck
->lock
;
733 * regular file: 16 byte (XAD slot) granularity
735 if (type
& tlckXTREE
) {
740 * copy xtree root from inode to dinode:
742 p
= &jfs_ip
->i_xtroot
;
745 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
746 memcpy(&xp
->xad
[lv
->offset
], &p
->xad
[lv
->offset
],
747 lv
->length
<< L2XTSLOTSIZE
);
750 /* reset on-disk (metadata page) xtree XAD_NEW bit */
751 xad
= &xp
->xad
[XTENTRYSTART
];
752 for (n
= XTENTRYSTART
;
753 n
< le16_to_cpu(xp
->header
.nextindex
); n
++, xad
++)
754 if (xad
->flag
& (XAD_NEW
| XAD_EXTENDED
))
755 xad
->flag
&= ~(XAD_NEW
| XAD_EXTENDED
);
758 * directory: 32 byte (directory entry slot) granularity
760 else if (type
& tlckDTREE
) {
764 * copy dtree root from inode to dinode:
766 p
= (dtpage_t
*) &jfs_ip
->i_dtroot
;
767 xp
= (dtpage_t
*) & dp
->di_dtroot
;
769 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
770 memcpy(&xp
->slot
[lv
->offset
], &p
->slot
[lv
->offset
],
771 lv
->length
<< L2DTSLOTSIZE
);
774 jfs_err("diWrite: UFO tlock");
779 * copy inline symlink from in-memory inode to on-disk inode
781 if (S_ISLNK(ip
->i_mode
) && ip
->i_size
< IDATASIZE
) {
782 lv
= & dilinelock
->lv
[dilinelock
->index
];
783 lv
->offset
= (dioffset
+ 2 * 128) >> L2INODESLOTSIZE
;
785 memcpy(&dp
->di_fastsymlink
, jfs_ip
->i_inline
, IDATASIZE
);
789 * copy inline data from in-memory inode to on-disk inode:
790 * 128 byte slot granularity
792 if (test_cflag(COMMIT_Inlineea
, ip
)) {
793 lv
= & dilinelock
->lv
[dilinelock
->index
];
794 lv
->offset
= (dioffset
+ 3 * 128) >> L2INODESLOTSIZE
;
796 memcpy(&dp
->di_inlineea
, jfs_ip
->i_inline_ea
, INODESLOTSIZE
);
799 clear_cflag(COMMIT_Inlineea
, ip
);
803 * lock/copy inode base: 128 byte slot granularity
806 lv
= & dilinelock
->lv
[dilinelock
->index
];
807 lv
->offset
= dioffset
>> L2INODESLOTSIZE
;
808 copy_to_dinode(dp
, ip
);
809 if (test_and_clear_cflag(COMMIT_Dirtable
, ip
)) {
811 memcpy(&dp
->di_dirtable
, &jfs_ip
->i_dirtable
, 96);
818 * We aren't logging changes to the DASD used in directory inodes,
819 * but we need to write them to disk. If we don't unmount cleanly,
820 * mount will recalculate the DASD used.
822 if (S_ISDIR(ip
->i_mode
)
823 && (ip
->i_ipmnt
->i_mntflag
& JFS_DASD_ENABLED
))
824 memcpy(&dp
->di_DASD
, &ip
->i_DASD
, sizeof(struct dasd
));
825 #endif /* _JFS_FASTDASD */
827 /* release the buffer holding the updated on-disk inode.
828 * the buffer will be later written by commit processing.
839 * FUNCTION: free a specified inode from the inode working map
840 * for a fileset or aggregate.
842 * if the inode to be freed represents the first (only)
843 * free inode within the iag, the iag will be placed on
844 * the ag free inode list.
846 * freeing the inode will cause the inode extent to be
847 * freed if the inode is the only allocated inode within
848 * the extent. in this case all the disk resource backing
849 * up the inode extent will be freed. in addition, the iag
850 * will be placed on the ag extent free list if the extent
851 * is the first free extent in the iag. if freeing the
852 * extent also means that no free inodes will exist for
853 * the iag, the iag will also be removed from the ag free
856 * the iag describing the inode will be freed if the extent
857 * is to be freed and it is the only backed extent within
858 * the iag. in this case, the iag will be removed from the
859 * ag free extent list and ag free inode list and placed on
860 * the inode map's free iag list.
862 * a careful update approach is used to provide consistency
863 * in the face of updates to multiple buffers. under this
864 * approach, all required buffers are obtained before making
865 * any updates and are held until all updates are complete.
868 * ip - inode to be freed.
874 int diFree(struct inode
*ip
)
877 ino_t inum
= ip
->i_ino
;
878 struct iag
*iagp
, *aiagp
, *biagp
, *ciagp
, *diagp
;
879 struct metapage
*mp
, *amp
, *bmp
, *cmp
, *dmp
;
880 int iagno
, ino
, extno
, bitno
, sword
, agno
;
883 struct inode
*ipimap
= JFS_SBI(ip
->i_sb
)->ipimap
;
884 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
887 struct inode
*iplist
[3];
889 struct pxd_lock
*pxdlock
;
892 * This is just to suppress compiler warnings. The same logic that
893 * references these variables is used to initialize them.
895 aiagp
= biagp
= ciagp
= diagp
= NULL
;
897 /* get the iag number containing the inode.
899 iagno
= INOTOIAG(inum
);
901 /* make sure that the iag is contained within
904 if (iagno
>= imap
->im_nextiag
) {
905 dump_mem("imap", imap
, 32);
907 "diFree: inum = %d, iagno = %d, nextiag = %d",
908 (uint
) inum
, iagno
, imap
->im_nextiag
);
912 /* get the allocation group for this ino.
914 agno
= JFS_IP(ip
)->agno
;
916 /* Lock the AG specific inode map information
920 /* Obtain read lock in imap inode. Don't release it until we have
921 * read all of the IAG's that we are going to.
923 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
927 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
928 IREAD_UNLOCK(ipimap
);
929 AG_UNLOCK(imap
, agno
);
932 iagp
= (struct iag
*) mp
->data
;
934 /* get the inode number and extent number of the inode within
935 * the iag and the inode number within the extent.
937 ino
= inum
& (INOSPERIAG
- 1);
938 extno
= ino
>> L2INOSPEREXT
;
939 bitno
= ino
& (INOSPEREXT
- 1);
940 mask
= HIGHORDER
>> bitno
;
942 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
944 "diFree: wmap shows inode already free");
947 if (!addressPXD(&iagp
->inoext
[extno
])) {
948 release_metapage(mp
);
949 IREAD_UNLOCK(ipimap
);
950 AG_UNLOCK(imap
, agno
);
951 jfs_error(ip
->i_sb
, "diFree: invalid inoext");
955 /* compute the bitmap for the extent reflecting the freed inode.
957 bitmap
= le32_to_cpu(iagp
->wmap
[extno
]) & ~mask
;
959 if (imap
->im_agctl
[agno
].numfree
> imap
->im_agctl
[agno
].numinos
) {
960 release_metapage(mp
);
961 IREAD_UNLOCK(ipimap
);
962 AG_UNLOCK(imap
, agno
);
963 jfs_error(ip
->i_sb
, "diFree: numfree > numinos");
967 * inode extent still has some inodes or below low water mark:
968 * keep the inode extent;
971 imap
->im_agctl
[agno
].numfree
< 96 ||
972 (imap
->im_agctl
[agno
].numfree
< 288 &&
973 (((imap
->im_agctl
[agno
].numfree
* 100) /
974 imap
->im_agctl
[agno
].numinos
) <= 25))) {
975 /* if the iag currently has no free inodes (i.e.,
976 * the inode being freed is the first free inode of iag),
977 * insert the iag at head of the inode free list for the ag.
979 if (iagp
->nfreeinos
== 0) {
980 /* check if there are any iags on the ag inode
981 * free list. if so, read the first one so that
982 * we can link the current iag onto the list at
985 if ((fwd
= imap
->im_agctl
[agno
].inofree
) >= 0) {
986 /* read the iag that currently is the head
989 if ((rc
= diIAGRead(imap
, fwd
, &
))) {
990 IREAD_UNLOCK(ipimap
);
991 AG_UNLOCK(imap
, agno
);
992 release_metapage(mp
);
995 aiagp
= (struct iag
*) amp
->data
;
997 /* make current head point back to the iag.
999 aiagp
->inofreeback
= cpu_to_le32(iagno
);
1001 write_metapage(amp
);
1004 /* iag points forward to current head and iag
1005 * becomes the new head of the list.
1008 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
1009 iagp
->inofreeback
= cpu_to_le32(-1);
1010 imap
->im_agctl
[agno
].inofree
= iagno
;
1012 IREAD_UNLOCK(ipimap
);
1014 /* update the free inode summary map for the extent if
1015 * freeing the inode means the extent will now have free
1016 * inodes (i.e., the inode being freed is the first free
1019 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
1020 sword
= extno
>> L2EXTSPERSUM
;
1021 bitno
= extno
& (EXTSPERSUM
- 1);
1022 iagp
->inosmap
[sword
] &=
1023 cpu_to_le32(~(HIGHORDER
>> bitno
));
1026 /* update the bitmap.
1028 iagp
->wmap
[extno
] = cpu_to_le32(bitmap
);
1030 /* update the free inode counts at the iag, ag and
1034 cpu_to_le32(le32_to_cpu(iagp
->nfreeinos
) + 1);
1035 imap
->im_agctl
[agno
].numfree
+= 1;
1036 atomic_inc(&imap
->im_numfree
);
1038 /* release the AG inode map lock
1040 AG_UNLOCK(imap
, agno
);
1050 * inode extent has become free and above low water mark:
1051 * free the inode extent;
1055 * prepare to update iag list(s) (careful update step 1)
1057 amp
= bmp
= cmp
= dmp
= NULL
;
1060 /* check if the iag currently has no free extents. if so,
1061 * it will be placed on the head of the ag extent free list.
1063 if (iagp
->nfreeexts
== 0) {
1064 /* check if the ag extent free list has any iags.
1065 * if so, read the iag at the head of the list now.
1066 * this (head) iag will be updated later to reflect
1067 * the addition of the current iag at the head of
1070 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
1071 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1073 aiagp
= (struct iag
*) amp
->data
;
1076 /* iag has free extents. check if the addition of a free
1077 * extent will cause all extents to be free within this
1078 * iag. if so, the iag will be removed from the ag extent
1079 * free list and placed on the inode map's free iag list.
1081 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1082 /* in preparation for removing the iag from the
1083 * ag extent free list, read the iags preceeding
1084 * and following the iag on the ag extent free
1087 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
1088 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1090 aiagp
= (struct iag
*) amp
->data
;
1093 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
1094 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
1096 biagp
= (struct iag
*) bmp
->data
;
1101 /* remove the iag from the ag inode free list if freeing
1102 * this extent cause the iag to have no free inodes.
1104 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1105 int inofreeback
= le32_to_cpu(iagp
->inofreeback
);
1106 int inofreefwd
= le32_to_cpu(iagp
->inofreefwd
);
1108 /* in preparation for removing the iag from the
1109 * ag inode free list, read the iags preceeding
1110 * and following the iag on the ag inode free
1111 * list. before reading these iags, we must make
1112 * sure that we already don't have them in hand
1113 * from up above, since re-reading an iag (buffer)
1114 * we are currently holding would cause a deadlock.
1116 if (inofreefwd
>= 0) {
1118 if (inofreefwd
== fwd
)
1119 ciagp
= (struct iag
*) amp
->data
;
1120 else if (inofreefwd
== back
)
1121 ciagp
= (struct iag
*) bmp
->data
;
1124 diIAGRead(imap
, inofreefwd
, &cmp
)))
1126 ciagp
= (struct iag
*) cmp
->data
;
1128 assert(ciagp
!= NULL
);
1131 if (inofreeback
>= 0) {
1132 if (inofreeback
== fwd
)
1133 diagp
= (struct iag
*) amp
->data
;
1134 else if (inofreeback
== back
)
1135 diagp
= (struct iag
*) bmp
->data
;
1138 diIAGRead(imap
, inofreeback
, &dmp
)))
1140 diagp
= (struct iag
*) dmp
->data
;
1142 assert(diagp
!= NULL
);
1146 IREAD_UNLOCK(ipimap
);
1149 * invalidate any page of the inode extent freed from buffer cache;
1151 freepxd
= iagp
->inoext
[extno
];
1152 invalidate_pxd_metapages(ip
, freepxd
);
1155 * update iag list(s) (careful update step 2)
1157 /* add the iag to the ag extent free list if this is the
1158 * first free extent for the iag.
1160 if (iagp
->nfreeexts
== 0) {
1162 aiagp
->extfreeback
= cpu_to_le32(iagno
);
1165 cpu_to_le32(imap
->im_agctl
[agno
].extfree
);
1166 iagp
->extfreeback
= cpu_to_le32(-1);
1167 imap
->im_agctl
[agno
].extfree
= iagno
;
1169 /* remove the iag from the ag extent list if all extents
1170 * are now free and place it on the inode map iag free list.
1172 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1174 aiagp
->extfreeback
= iagp
->extfreeback
;
1177 biagp
->extfreefwd
= iagp
->extfreefwd
;
1179 imap
->im_agctl
[agno
].extfree
=
1180 le32_to_cpu(iagp
->extfreefwd
);
1182 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
1185 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1186 imap
->im_freeiag
= iagno
;
1187 IAGFREE_UNLOCK(imap
);
1191 /* remove the iag from the ag inode free list if freeing
1192 * this extent causes the iag to have no free inodes.
1194 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1195 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0)
1196 ciagp
->inofreeback
= iagp
->inofreeback
;
1198 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0)
1199 diagp
->inofreefwd
= iagp
->inofreefwd
;
1201 imap
->im_agctl
[agno
].inofree
=
1202 le32_to_cpu(iagp
->inofreefwd
);
1204 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
1207 /* update the inode extent address and working map
1208 * to reflect the free extent.
1209 * the permanent map should have been updated already
1210 * for the inode being freed.
1212 if (iagp
->pmap
[extno
] != 0) {
1213 jfs_error(ip
->i_sb
, "diFree: the pmap does not show inode free");
1215 iagp
->wmap
[extno
] = 0;
1216 PXDlength(&iagp
->inoext
[extno
], 0);
1217 PXDaddress(&iagp
->inoext
[extno
], 0);
1219 /* update the free extent and free inode summary maps
1220 * to reflect the freed extent.
1221 * the inode summary map is marked to indicate no inodes
1222 * available for the freed extent.
1224 sword
= extno
>> L2EXTSPERSUM
;
1225 bitno
= extno
& (EXTSPERSUM
- 1);
1226 mask
= HIGHORDER
>> bitno
;
1227 iagp
->inosmap
[sword
] |= cpu_to_le32(mask
);
1228 iagp
->extsmap
[sword
] &= cpu_to_le32(~mask
);
1230 /* update the number of free inodes and number of free extents
1233 iagp
->nfreeinos
= cpu_to_le32(le32_to_cpu(iagp
->nfreeinos
) -
1235 iagp
->nfreeexts
= cpu_to_le32(le32_to_cpu(iagp
->nfreeexts
) + 1);
1237 /* update the number of free inodes and backed inodes
1238 * at the ag and inode map level.
1240 imap
->im_agctl
[agno
].numfree
-= (INOSPEREXT
- 1);
1241 imap
->im_agctl
[agno
].numinos
-= INOSPEREXT
;
1242 atomic_sub(INOSPEREXT
- 1, &imap
->im_numfree
);
1243 atomic_sub(INOSPEREXT
, &imap
->im_numinos
);
1246 write_metapage(amp
);
1248 write_metapage(bmp
);
1250 write_metapage(cmp
);
1252 write_metapage(dmp
);
1255 * start transaction to update block allocation map
1256 * for the inode extent freed;
1258 * N.B. AG_LOCK is released and iag will be released below, and
1259 * other thread may allocate inode from/reusing the ixad freed
1260 * BUT with new/different backing inode extent from the extent
1261 * to be freed by the transaction;
1263 tid
= txBegin(ipimap
->i_sb
, COMMIT_FORCE
);
1264 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
1266 /* acquire tlock of the iag page of the freed ixad
1267 * to force the page NOHOMEOK (even though no data is
1268 * logged from the iag page) until NOREDOPAGE|FREEXTENT log
1269 * for the free of the extent is committed;
1270 * write FREEXTENT|NOREDOPAGE log record
1271 * N.B. linelock is overlaid as freed extent descriptor;
1273 tlck
= txLock(tid
, ipimap
, mp
, tlckINODE
| tlckFREE
);
1274 pxdlock
= (struct pxd_lock
*) & tlck
->lock
;
1275 pxdlock
->flag
= mlckFREEPXD
;
1276 pxdlock
->pxd
= freepxd
;
1284 * logredo needs the IAG number and IAG extent index in order
1285 * to ensure that the IMap is consistent. The least disruptive
1286 * way to pass these values through to the transaction manager
1287 * is in the iplist array.
1289 * It's not pretty, but it works.
1291 iplist
[1] = (struct inode
*) (size_t)iagno
;
1292 iplist
[2] = (struct inode
*) (size_t)extno
;
1294 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
1297 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
1299 /* unlock the AG inode map information */
1300 AG_UNLOCK(imap
, agno
);
1305 IREAD_UNLOCK(ipimap
);
1308 release_metapage(amp
);
1310 release_metapage(bmp
);
1312 release_metapage(cmp
);
1314 release_metapage(dmp
);
1316 AG_UNLOCK(imap
, agno
);
1318 release_metapage(mp
);
1324 * There are several places in the diAlloc* routines where we initialize
1328 diInitInode(struct inode
*ip
, int iagno
, int ino
, int extno
, struct iag
* iagp
)
1330 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
1331 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
1333 ip
->i_ino
= (iagno
<< L2INOSPERIAG
) + ino
;
1334 jfs_ip
->ixpxd
= iagp
->inoext
[extno
];
1335 jfs_ip
->agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), sbi
);
1336 jfs_ip
->active_ag
= -1;
1341 * NAME: diAlloc(pip,dir,ip)
1343 * FUNCTION: allocate a disk inode from the inode working map
1344 * for a fileset or aggregate.
1347 * pip - pointer to incore inode for the parent inode.
1348 * dir - 'true' if the new disk inode is for a directory.
1349 * ip - pointer to a new inode
1353 * -ENOSPC - insufficient disk resources.
1356 int diAlloc(struct inode
*pip
, bool dir
, struct inode
*ip
)
1358 int rc
, ino
, iagno
, addext
, extno
, bitno
, sword
;
1359 int nwords
, rem
, i
, agno
;
1360 u32 mask
, inosmap
, extsmap
;
1361 struct inode
*ipimap
;
1362 struct metapage
*mp
;
1365 struct inomap
*imap
;
1367 /* get the pointers to the inode map inode and the
1368 * corresponding imap control structure.
1370 ipimap
= JFS_SBI(pip
->i_sb
)->ipimap
;
1371 imap
= JFS_IP(ipimap
)->i_imap
;
1372 JFS_IP(ip
)->ipimap
= ipimap
;
1373 JFS_IP(ip
)->fileset
= FILESYSTEM_I
;
1375 /* for a directory, the allocation policy is to start
1376 * at the ag level using the preferred ag.
1379 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1380 AG_LOCK(imap
, agno
);
1384 /* for files, the policy starts off by trying to allocate from
1385 * the same iag containing the parent disk inode:
1386 * try to allocate the new disk inode close to the parent disk
1387 * inode, using parent disk inode number + 1 as the allocation
1388 * hint. (we use a left-to-right policy to attempt to avoid
1389 * moving backward on the disk.) compute the hint within the
1390 * file system and the iag.
1393 /* get the ag number of this iag */
1394 agno
= JFS_IP(pip
)->agno
;
1396 if (atomic_read(&JFS_SBI(pip
->i_sb
)->bmap
->db_active
[agno
])) {
1398 * There is an open file actively growing. We want to
1399 * allocate new inodes from a different ag to avoid
1400 * fragmentation problems.
1402 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1403 AG_LOCK(imap
, agno
);
1407 inum
= pip
->i_ino
+ 1;
1408 ino
= inum
& (INOSPERIAG
- 1);
1410 /* back off the hint if it is outside of the iag */
1414 /* lock the AG inode map information */
1415 AG_LOCK(imap
, agno
);
1417 /* Get read lock on imap inode */
1418 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
1420 /* get the iag number and read the iag */
1421 iagno
= INOTOIAG(inum
);
1422 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1423 IREAD_UNLOCK(ipimap
);
1424 AG_UNLOCK(imap
, agno
);
1427 iagp
= (struct iag
*) mp
->data
;
1429 /* determine if new inode extent is allowed to be added to the iag.
1430 * new inode extent can be added to the iag if the ag
1431 * has less than 32 free disk inodes and the iag has free extents.
1433 addext
= (imap
->im_agctl
[agno
].numfree
< 32 && iagp
->nfreeexts
);
1436 * try to allocate from the IAG
1438 /* check if the inode may be allocated from the iag
1439 * (i.e. the inode has free inodes or new extent can be added).
1441 if (iagp
->nfreeinos
|| addext
) {
1442 /* determine the extent number of the hint.
1444 extno
= ino
>> L2INOSPEREXT
;
1446 /* check if the extent containing the hint has backed
1447 * inodes. if so, try to allocate within this extent.
1449 if (addressPXD(&iagp
->inoext
[extno
])) {
1450 bitno
= ino
& (INOSPEREXT
- 1);
1452 diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1455 ino
= (extno
<< L2INOSPEREXT
) + bitno
;
1457 /* a free inode (bit) was found within this
1458 * extent, so allocate it.
1460 rc
= diAllocBit(imap
, iagp
, ino
);
1461 IREAD_UNLOCK(ipimap
);
1465 /* set the results of the allocation
1466 * and write the iag.
1468 diInitInode(ip
, iagno
, ino
, extno
,
1470 mark_metapage_dirty(mp
);
1472 release_metapage(mp
);
1474 /* free the AG lock and return.
1476 AG_UNLOCK(imap
, agno
);
1483 EXTSPERIAG
- 1) ? 0 : extno
+ 1;
1487 * no free inodes within the extent containing the hint.
1489 * try to allocate from the backed extents following
1490 * hint or, if appropriate (i.e. addext is true), allocate
1491 * an extent of free inodes at or following the extent
1492 * containing the hint.
1494 * the free inode and free extent summary maps are used
1495 * here, so determine the starting summary map position
1496 * and the number of words we'll have to examine. again,
1497 * the approach is to allocate following the hint, so we
1498 * might have to initially ignore prior bits of the summary
1499 * map that represent extents prior to the extent containing
1500 * the hint and later revisit these bits.
1502 bitno
= extno
& (EXTSPERSUM
- 1);
1503 nwords
= (bitno
== 0) ? SMAPSZ
: SMAPSZ
+ 1;
1504 sword
= extno
>> L2EXTSPERSUM
;
1506 /* mask any prior bits for the starting words of the
1509 mask
= ONES
<< (EXTSPERSUM
- bitno
);
1510 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]) | mask
;
1511 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]) | mask
;
1513 /* scan the free inode and free extent summary maps for
1516 for (i
= 0; i
< nwords
; i
++) {
1517 /* check if this word of the free inode summary
1518 * map describes an extent with free inodes.
1521 /* an extent with free inodes has been
1522 * found. determine the extent number
1523 * and the inode number within the extent.
1525 rem
= diFindFree(inosmap
, 0);
1526 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1527 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1529 if (rem
>= INOSPEREXT
) {
1530 IREAD_UNLOCK(ipimap
);
1531 release_metapage(mp
);
1532 AG_UNLOCK(imap
, agno
);
1534 "diAlloc: can't find free bit "
1539 /* determine the inode number within the
1540 * iag and allocate the inode from the
1543 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1544 rc
= diAllocBit(imap
, iagp
, ino
);
1545 IREAD_UNLOCK(ipimap
);
1549 /* set the results of the allocation
1550 * and write the iag.
1552 diInitInode(ip
, iagno
, ino
, extno
,
1554 mark_metapage_dirty(mp
);
1556 release_metapage(mp
);
1558 /* free the AG lock and return.
1560 AG_UNLOCK(imap
, agno
);
1565 /* check if we may allocate an extent of free
1566 * inodes and whether this word of the free
1567 * extents summary map describes a free extent.
1569 if (addext
&& ~extsmap
) {
1570 /* a free extent has been found. determine
1571 * the extent number.
1573 rem
= diFindFree(extsmap
, 0);
1574 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1576 /* allocate an extent of free inodes.
1578 if ((rc
= diNewExt(imap
, iagp
, extno
))) {
1579 /* if there is no disk space for a
1580 * new extent, try to allocate the
1581 * disk inode from somewhere else.
1588 /* set the results of the allocation
1589 * and write the iag.
1591 diInitInode(ip
, iagno
,
1592 extno
<< L2INOSPEREXT
,
1594 mark_metapage_dirty(mp
);
1596 release_metapage(mp
);
1597 /* free the imap inode & the AG lock & return.
1599 IREAD_UNLOCK(ipimap
);
1600 AG_UNLOCK(imap
, agno
);
1604 /* move on to the next set of summary map words.
1606 sword
= (sword
== SMAPSZ
- 1) ? 0 : sword
+ 1;
1607 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]);
1608 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]);
1611 /* unlock imap inode */
1612 IREAD_UNLOCK(ipimap
);
1614 /* nothing doing in this iag, so release it. */
1615 release_metapage(mp
);
1619 * try to allocate anywhere within the same AG as the parent inode.
1621 rc
= diAllocAG(imap
, agno
, dir
, ip
);
1623 AG_UNLOCK(imap
, agno
);
1629 * try to allocate in any AG.
1631 return (diAllocAny(imap
, agno
, dir
, ip
));
1636 * NAME: diAllocAG(imap,agno,dir,ip)
1638 * FUNCTION: allocate a disk inode from the allocation group.
1640 * this routine first determines if a new extent of free
1641 * inodes should be added for the allocation group, with
1642 * the current request satisfied from this extent. if this
1643 * is the case, an attempt will be made to do just that. if
1644 * this attempt fails or it has been determined that a new
1645 * extent should not be added, an attempt is made to satisfy
1646 * the request by allocating an existing (backed) free inode
1647 * from the allocation group.
1649 * PRE CONDITION: Already have the AG lock for this AG.
1652 * imap - pointer to inode map control structure.
1653 * agno - allocation group to allocate from.
1654 * dir - 'true' if the new disk inode is for a directory.
1655 * ip - pointer to the new inode to be filled in on successful return
1656 * with the disk inode number allocated, its extent address
1657 * and the start of the ag.
1661 * -ENOSPC - insufficient disk resources.
1665 diAllocAG(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1667 int rc
, addext
, numfree
, numinos
;
1669 /* get the number of free and the number of backed disk
1670 * inodes currently within the ag.
1672 numfree
= imap
->im_agctl
[agno
].numfree
;
1673 numinos
= imap
->im_agctl
[agno
].numinos
;
1675 if (numfree
> numinos
) {
1676 jfs_error(ip
->i_sb
, "diAllocAG: numfree > numinos");
1680 /* determine if we should allocate a new extent of free inodes
1681 * within the ag: for directory inodes, add a new extent
1682 * if there are a small number of free inodes or number of free
1683 * inodes is a small percentage of the number of backed inodes.
1686 addext
= (numfree
< 64 ||
1688 && ((numfree
* 100) / numinos
) <= 20));
1690 addext
= (numfree
== 0);
1693 * try to allocate a new extent of free inodes.
1696 /* if free space is not avaliable for this new extent, try
1697 * below to allocate a free and existing (already backed)
1698 * inode from the ag.
1700 if ((rc
= diAllocExt(imap
, agno
, ip
)) != -ENOSPC
)
1705 * try to allocate an existing free inode from the ag.
1707 return (diAllocIno(imap
, agno
, ip
));
1712 * NAME: diAllocAny(imap,agno,dir,iap)
1714 * FUNCTION: allocate a disk inode from any other allocation group.
1716 * this routine is called when an allocation attempt within
1717 * the primary allocation group has failed. if attempts to
1718 * allocate an inode from any allocation group other than the
1719 * specified primary group.
1722 * imap - pointer to inode map control structure.
1723 * agno - primary allocation group (to avoid).
1724 * dir - 'true' if the new disk inode is for a directory.
1725 * ip - pointer to a new inode to be filled in on successful return
1726 * with the disk inode number allocated, its extent address
1727 * and the start of the ag.
1731 * -ENOSPC - insufficient disk resources.
1735 diAllocAny(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1738 int maxag
= JFS_SBI(imap
->im_ipimap
->i_sb
)->bmap
->db_maxag
;
1741 /* try to allocate from the ags following agno up to
1742 * the maximum ag number.
1744 for (ag
= agno
+ 1; ag
<= maxag
; ag
++) {
1747 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1749 AG_UNLOCK(imap
, ag
);
1755 /* try to allocate from the ags in front of agno.
1757 for (ag
= 0; ag
< agno
; ag
++) {
1760 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1762 AG_UNLOCK(imap
, ag
);
1768 /* no free disk inodes.
1775 * NAME: diAllocIno(imap,agno,ip)
1777 * FUNCTION: allocate a disk inode from the allocation group's free
1778 * inode list, returning an error if this free list is
1779 * empty (i.e. no iags on the list).
1781 * allocation occurs from the first iag on the list using
1782 * the iag's free inode summary map to find the leftmost
1783 * free inode in the iag.
1785 * PRE CONDITION: Already have AG lock for this AG.
1788 * imap - pointer to inode map control structure.
1789 * agno - allocation group.
1790 * ip - pointer to new inode to be filled in on successful return
1791 * with the disk inode number allocated, its extent address
1792 * and the start of the ag.
1796 * -ENOSPC - insufficient disk resources.
1799 static int diAllocIno(struct inomap
* imap
, int agno
, struct inode
*ip
)
1801 int iagno
, ino
, rc
, rem
, extno
, sword
;
1802 struct metapage
*mp
;
1805 /* check if there are iags on the ag's free inode list.
1807 if ((iagno
= imap
->im_agctl
[agno
].inofree
) < 0)
1810 /* obtain read lock on imap inode */
1811 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1813 /* read the iag at the head of the list.
1815 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1816 IREAD_UNLOCK(imap
->im_ipimap
);
1819 iagp
= (struct iag
*) mp
->data
;
1821 /* better be free inodes in this iag if it is on the
1824 if (!iagp
->nfreeinos
) {
1825 IREAD_UNLOCK(imap
->im_ipimap
);
1826 release_metapage(mp
);
1828 "diAllocIno: nfreeinos = 0, but iag on freelist");
1832 /* scan the free inode summary map to find an extent
1835 for (sword
= 0;; sword
++) {
1836 if (sword
>= SMAPSZ
) {
1837 IREAD_UNLOCK(imap
->im_ipimap
);
1838 release_metapage(mp
);
1840 "diAllocIno: free inode not found in summary map");
1844 if (~iagp
->inosmap
[sword
])
1848 /* found a extent with free inodes. determine
1849 * the extent number.
1851 rem
= diFindFree(le32_to_cpu(iagp
->inosmap
[sword
]), 0);
1852 if (rem
>= EXTSPERSUM
) {
1853 IREAD_UNLOCK(imap
->im_ipimap
);
1854 release_metapage(mp
);
1855 jfs_error(ip
->i_sb
, "diAllocIno: no free extent found");
1858 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1860 /* find the first free inode in the extent.
1862 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]), 0);
1863 if (rem
>= INOSPEREXT
) {
1864 IREAD_UNLOCK(imap
->im_ipimap
);
1865 release_metapage(mp
);
1866 jfs_error(ip
->i_sb
, "diAllocIno: free inode not found");
1870 /* compute the inode number within the iag.
1872 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1874 /* allocate the inode.
1876 rc
= diAllocBit(imap
, iagp
, ino
);
1877 IREAD_UNLOCK(imap
->im_ipimap
);
1879 release_metapage(mp
);
1883 /* set the results of the allocation and write the iag.
1885 diInitInode(ip
, iagno
, ino
, extno
, iagp
);
1893 * NAME: diAllocExt(imap,agno,ip)
1895 * FUNCTION: add a new extent of free inodes to an iag, allocating
1896 * an inode from this extent to satisfy the current allocation
1899 * this routine first tries to find an existing iag with free
1900 * extents through the ag free extent list. if list is not
1901 * empty, the head of the list will be selected as the home
1902 * of the new extent of free inodes. otherwise (the list is
1903 * empty), a new iag will be allocated for the ag to contain
1906 * once an iag has been selected, the free extent summary map
1907 * is used to locate a free extent within the iag and diNewExt()
1908 * is called to initialize the extent, with initialization
1909 * including the allocation of the first inode of the extent
1910 * for the purpose of satisfying this request.
1913 * imap - pointer to inode map control structure.
1914 * agno - allocation group number.
1915 * ip - pointer to new inode to be filled in on successful return
1916 * with the disk inode number allocated, its extent address
1917 * and the start of the ag.
1921 * -ENOSPC - insufficient disk resources.
1924 static int diAllocExt(struct inomap
* imap
, int agno
, struct inode
*ip
)
1926 int rem
, iagno
, sword
, extno
, rc
;
1927 struct metapage
*mp
;
1930 /* check if the ag has any iags with free extents. if not,
1931 * allocate a new iag for the ag.
1933 if ((iagno
= imap
->im_agctl
[agno
].extfree
) < 0) {
1934 /* If successful, diNewIAG will obtain the read lock on the
1937 if ((rc
= diNewIAG(imap
, &iagno
, agno
, &mp
))) {
1940 iagp
= (struct iag
*) mp
->data
;
1942 /* set the ag number if this a brand new iag
1945 cpu_to_le64(AGTOBLK(agno
, imap
->im_ipimap
));
1949 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1950 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1951 IREAD_UNLOCK(imap
->im_ipimap
);
1952 jfs_error(ip
->i_sb
, "diAllocExt: error reading iag");
1955 iagp
= (struct iag
*) mp
->data
;
1958 /* using the free extent summary map, find a free extent.
1960 for (sword
= 0;; sword
++) {
1961 if (sword
>= SMAPSZ
) {
1962 release_metapage(mp
);
1963 IREAD_UNLOCK(imap
->im_ipimap
);
1965 "diAllocExt: free ext summary map not found");
1968 if (~iagp
->extsmap
[sword
])
1972 /* determine the extent number of the free extent.
1974 rem
= diFindFree(le32_to_cpu(iagp
->extsmap
[sword
]), 0);
1975 if (rem
>= EXTSPERSUM
) {
1976 release_metapage(mp
);
1977 IREAD_UNLOCK(imap
->im_ipimap
);
1978 jfs_error(ip
->i_sb
, "diAllocExt: free extent not found");
1981 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1983 /* initialize the new extent.
1985 rc
= diNewExt(imap
, iagp
, extno
);
1986 IREAD_UNLOCK(imap
->im_ipimap
);
1988 /* something bad happened. if a new iag was allocated,
1989 * place it back on the inode map's iag free list, and
1990 * clear the ag number information.
1992 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
1994 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1995 imap
->im_freeiag
= iagno
;
1996 IAGFREE_UNLOCK(imap
);
2002 /* set the results of the allocation and write the iag.
2004 diInitInode(ip
, iagno
, extno
<< L2INOSPEREXT
, extno
, iagp
);
2013 * NAME: diAllocBit(imap,iagp,ino)
2015 * FUNCTION: allocate a backed inode from an iag.
2017 * this routine performs the mechanics of allocating a
2018 * specified inode from a backed extent.
2020 * if the inode to be allocated represents the last free
2021 * inode within the iag, the iag will be removed from the
2022 * ag free inode list.
2024 * a careful update approach is used to provide consistency
2025 * in the face of updates to multiple buffers. under this
2026 * approach, all required buffers are obtained before making
2027 * any updates and are held all are updates are complete.
2029 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
2030 * this AG. Must have read lock on imap inode.
2033 * imap - pointer to inode map control structure.
2034 * iagp - pointer to iag.
2035 * ino - inode number to be allocated within the iag.
2039 * -ENOSPC - insufficient disk resources.
2042 static int diAllocBit(struct inomap
* imap
, struct iag
* iagp
, int ino
)
2044 int extno
, bitno
, agno
, sword
, rc
;
2045 struct metapage
*amp
= NULL
, *bmp
= NULL
;
2046 struct iag
*aiagp
= NULL
, *biagp
= NULL
;
2049 /* check if this is the last free inode within the iag.
2050 * if so, it will have to be removed from the ag free
2051 * inode list, so get the iags preceeding and following
2054 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2055 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0) {
2057 diIAGRead(imap
, le32_to_cpu(iagp
->inofreefwd
),
2060 aiagp
= (struct iag
*) amp
->data
;
2063 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0) {
2066 le32_to_cpu(iagp
->inofreeback
),
2069 release_metapage(amp
);
2072 biagp
= (struct iag
*) bmp
->data
;
2076 /* get the ag number, extent number, inode number within
2079 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), JFS_SBI(imap
->im_ipimap
->i_sb
));
2080 extno
= ino
>> L2INOSPEREXT
;
2081 bitno
= ino
& (INOSPEREXT
- 1);
2083 /* compute the mask for setting the map.
2085 mask
= HIGHORDER
>> bitno
;
2087 /* the inode should be free and backed.
2089 if (((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) ||
2090 ((le32_to_cpu(iagp
->wmap
[extno
]) & mask
) != 0) ||
2091 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
2093 release_metapage(amp
);
2095 release_metapage(bmp
);
2097 jfs_error(imap
->im_ipimap
->i_sb
,
2098 "diAllocBit: iag inconsistent");
2102 /* mark the inode as allocated in the working map.
2104 iagp
->wmap
[extno
] |= cpu_to_le32(mask
);
2106 /* check if all inodes within the extent are now
2107 * allocated. if so, update the free inode summary
2108 * map to reflect this.
2110 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
2111 sword
= extno
>> L2EXTSPERSUM
;
2112 bitno
= extno
& (EXTSPERSUM
- 1);
2113 iagp
->inosmap
[sword
] |= cpu_to_le32(HIGHORDER
>> bitno
);
2116 /* if this was the last free inode in the iag, remove the
2117 * iag from the ag free inode list.
2119 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2121 aiagp
->inofreeback
= iagp
->inofreeback
;
2122 write_metapage(amp
);
2126 biagp
->inofreefwd
= iagp
->inofreefwd
;
2127 write_metapage(bmp
);
2129 imap
->im_agctl
[agno
].inofree
=
2130 le32_to_cpu(iagp
->inofreefwd
);
2132 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2135 /* update the free inode count at the iag, ag, inode
2138 iagp
->nfreeinos
= cpu_to_le32(le32_to_cpu(iagp
->nfreeinos
) - 1);
2139 imap
->im_agctl
[agno
].numfree
-= 1;
2140 atomic_dec(&imap
->im_numfree
);
2147 * NAME: diNewExt(imap,iagp,extno)
2149 * FUNCTION: initialize a new extent of inodes for an iag, allocating
2150 * the first inode of the extent for use for the current
2151 * allocation request.
2153 * disk resources are allocated for the new extent of inodes
2154 * and the inodes themselves are initialized to reflect their
2155 * existence within the extent (i.e. their inode numbers and
2156 * inode extent addresses are set) and their initial state
2157 * (mode and link count are set to zero).
2159 * if the iag is new, it is not yet on an ag extent free list
2160 * but will now be placed on this list.
2162 * if the allocation of the new extent causes the iag to
2163 * have no free extent, the iag will be removed from the
2164 * ag extent free list.
2166 * if the iag has no free backed inodes, it will be placed
2167 * on the ag free inode list, since the addition of the new
2168 * extent will now cause it to have free inodes.
2170 * a careful update approach is used to provide consistency
2171 * (i.e. list consistency) in the face of updates to multiple
2172 * buffers. under this approach, all required buffers are
2173 * obtained before making any updates and are held until all
2174 * updates are complete.
2176 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
2177 * this AG. Must have read lock on imap inode.
2180 * imap - pointer to inode map control structure.
2181 * iagp - pointer to iag.
2182 * extno - extent number.
2186 * -ENOSPC - insufficient disk resources.
2189 static int diNewExt(struct inomap
* imap
, struct iag
* iagp
, int extno
)
2191 int agno
, iagno
, fwd
, back
, freei
= 0, sword
, rc
;
2192 struct iag
*aiagp
= NULL
, *biagp
= NULL
, *ciagp
= NULL
;
2193 struct metapage
*amp
, *bmp
, *cmp
, *dmp
;
2194 struct inode
*ipimap
;
2200 struct jfs_sb_info
*sbi
;
2202 /* better have free extents.
2204 if (!iagp
->nfreeexts
) {
2205 jfs_error(imap
->im_ipimap
->i_sb
, "diNewExt: no free extents");
2209 /* get the inode map inode.
2211 ipimap
= imap
->im_ipimap
;
2212 sbi
= JFS_SBI(ipimap
->i_sb
);
2214 amp
= bmp
= cmp
= NULL
;
2216 /* get the ag and iag numbers for this iag.
2218 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), sbi
);
2219 iagno
= le32_to_cpu(iagp
->iagnum
);
2221 /* check if this is the last free extent within the
2222 * iag. if so, the iag must be removed from the ag
2223 * free extent list, so get the iags preceeding and
2224 * following the iag on this list.
2226 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2227 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
2228 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2230 aiagp
= (struct iag
*) amp
->data
;
2233 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
2234 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
2236 biagp
= (struct iag
*) bmp
->data
;
2239 /* the iag has free extents. if all extents are free
2240 * (as is the case for a newly allocated iag), the iag
2241 * must be added to the ag free extent list, so get
2242 * the iag at the head of the list in preparation for
2243 * adding this iag to this list.
2246 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2247 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
2248 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2250 aiagp
= (struct iag
*) amp
->data
;
2255 /* check if the iag has no free inodes. if so, the iag
2256 * will have to be added to the ag free inode list, so get
2257 * the iag at the head of the list in preparation for
2258 * adding this iag to this list. in doing this, we must
2259 * check if we already have the iag at the head of
2262 if (iagp
->nfreeinos
== 0) {
2263 freei
= imap
->im_agctl
[agno
].inofree
;
2268 } else if (freei
== back
) {
2271 if ((rc
= diIAGRead(imap
, freei
, &cmp
)))
2273 ciagp
= (struct iag
*) cmp
->data
;
2275 if (ciagp
== NULL
) {
2276 jfs_error(imap
->im_ipimap
->i_sb
,
2277 "diNewExt: ciagp == NULL");
2284 /* allocate disk space for the inode extent.
2286 if ((extno
== 0) || (addressPXD(&iagp
->inoext
[extno
- 1]) == 0))
2287 hint
= ((s64
) agno
<< sbi
->bmap
->db_agl2size
) - 1;
2289 hint
= addressPXD(&iagp
->inoext
[extno
- 1]) +
2290 lengthPXD(&iagp
->inoext
[extno
- 1]) - 1;
2292 if ((rc
= dbAlloc(ipimap
, hint
, (s64
) imap
->im_nbperiext
, &blkno
)))
2295 /* compute the inode number of the first inode within the
2298 ino
= (iagno
<< L2INOSPERIAG
) + (extno
<< L2INOSPEREXT
);
2300 /* initialize the inodes within the newly allocated extent a
2303 for (i
= 0; i
< imap
->im_nbperiext
; i
+= sbi
->nbperpage
) {
2304 /* get a buffer for this page of disk inodes.
2306 dmp
= get_metapage(ipimap
, blkno
+ i
, PSIZE
, 1);
2311 dp
= (struct dinode
*) dmp
->data
;
2313 /* initialize the inode number, mode, link count and
2314 * inode extent address.
2316 for (j
= 0; j
< INOSPERPAGE
; j
++, dp
++, ino
++) {
2317 dp
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
2318 dp
->di_number
= cpu_to_le32(ino
);
2319 dp
->di_fileset
= cpu_to_le32(FILESYSTEM_I
);
2322 PXDaddress(&(dp
->di_ixpxd
), blkno
);
2323 PXDlength(&(dp
->di_ixpxd
), imap
->im_nbperiext
);
2325 write_metapage(dmp
);
2328 /* if this is the last free extent within the iag, remove the
2329 * iag from the ag free extent list.
2331 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2333 aiagp
->extfreeback
= iagp
->extfreeback
;
2336 biagp
->extfreefwd
= iagp
->extfreefwd
;
2338 imap
->im_agctl
[agno
].extfree
=
2339 le32_to_cpu(iagp
->extfreefwd
);
2341 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2343 /* if the iag has all free extents (newly allocated iag),
2344 * add the iag to the ag free extent list.
2346 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2348 aiagp
->extfreeback
= cpu_to_le32(iagno
);
2350 iagp
->extfreefwd
= cpu_to_le32(fwd
);
2351 iagp
->extfreeback
= cpu_to_le32(-1);
2352 imap
->im_agctl
[agno
].extfree
= iagno
;
2356 /* if the iag has no free inodes, add the iag to the
2357 * ag free inode list.
2359 if (iagp
->nfreeinos
== 0) {
2361 ciagp
->inofreeback
= cpu_to_le32(iagno
);
2364 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
2365 iagp
->inofreeback
= cpu_to_le32(-1);
2366 imap
->im_agctl
[agno
].inofree
= iagno
;
2369 /* initialize the extent descriptor of the extent. */
2370 PXDlength(&iagp
->inoext
[extno
], imap
->im_nbperiext
);
2371 PXDaddress(&iagp
->inoext
[extno
], blkno
);
2373 /* initialize the working and persistent map of the extent.
2374 * the working map will be initialized such that
2375 * it indicates the first inode of the extent is allocated.
2377 iagp
->wmap
[extno
] = cpu_to_le32(HIGHORDER
);
2378 iagp
->pmap
[extno
] = 0;
2380 /* update the free inode and free extent summary maps
2381 * for the extent to indicate the extent has free inodes
2382 * and no longer represents a free extent.
2384 sword
= extno
>> L2EXTSPERSUM
;
2385 mask
= HIGHORDER
>> (extno
& (EXTSPERSUM
- 1));
2386 iagp
->extsmap
[sword
] |= cpu_to_le32(mask
);
2387 iagp
->inosmap
[sword
] &= cpu_to_le32(~mask
);
2389 /* update the free inode and free extent counts for the
2392 iagp
->nfreeinos
= cpu_to_le32(le32_to_cpu(iagp
->nfreeinos
) +
2394 iagp
->nfreeexts
= cpu_to_le32(le32_to_cpu(iagp
->nfreeexts
) - 1);
2396 /* update the free and backed inode counts for the ag.
2398 imap
->im_agctl
[agno
].numfree
+= (INOSPEREXT
- 1);
2399 imap
->im_agctl
[agno
].numinos
+= INOSPEREXT
;
2401 /* update the free and backed inode counts for the inode map.
2403 atomic_add(INOSPEREXT
- 1, &imap
->im_numfree
);
2404 atomic_add(INOSPEREXT
, &imap
->im_numinos
);
2409 write_metapage(amp
);
2411 write_metapage(bmp
);
2413 write_metapage(cmp
);
2419 /* release the iags.
2422 release_metapage(amp
);
2424 release_metapage(bmp
);
2426 release_metapage(cmp
);
2433 * NAME: diNewIAG(imap,iagnop,agno)
2435 * FUNCTION: allocate a new iag for an allocation group.
2437 * first tries to allocate the iag from the inode map
2439 * if the list has free iags, the head of the list is removed
2440 * and returned to satisfy the request.
2441 * if the inode map's iag free list is empty, the inode map
2442 * is extended to hold a new iag. this new iag is initialized
2443 * and returned to satisfy the request.
2446 * imap - pointer to inode map control structure.
2447 * iagnop - pointer to an iag number set with the number of the
2448 * newly allocated iag upon successful return.
2449 * agno - allocation group number.
2450 * bpp - Buffer pointer to be filled in with new IAG's buffer
2454 * -ENOSPC - insufficient disk resources.
2458 * AG lock held on entry/exit;
2459 * write lock on the map is held inside;
2460 * read lock on the map is held on successful completion;
2462 * note: new iag transaction:
2463 * . synchronously write iag;
2464 * . write log of xtree and inode of imap;
2466 * . synchronous write of xtree (right to left, bottom to top);
2467 * . at start of logredo(): init in-memory imap with one additional iag page;
2468 * . at end of logredo(): re-read imap inode to determine
2472 diNewIAG(struct inomap
* imap
, int *iagnop
, int agno
, struct metapage
** mpp
)
2476 struct inode
*ipimap
;
2477 struct super_block
*sb
;
2478 struct jfs_sb_info
*sbi
;
2479 struct metapage
*mp
;
2484 #ifdef _STILL_TO_PORT
2486 #endif /* _STILL_TO_PORT */
2487 struct inode
*iplist
[1];
2489 /* pick up pointers to the inode map and mount inodes */
2490 ipimap
= imap
->im_ipimap
;
2494 /* acquire the free iag lock */
2497 /* if there are any iags on the inode map free iag list,
2498 * allocate the iag from the head of the list.
2500 if (imap
->im_freeiag
>= 0) {
2501 /* pick up the iag number at the head of the list */
2502 iagno
= imap
->im_freeiag
;
2504 /* determine the logical block number of the iag */
2505 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2507 /* no free iags. the inode map will have to be extented
2508 * to include a new iag.
2511 /* acquire inode map lock */
2512 IWRITE_LOCK(ipimap
, RDWRLOCK_IMAP
);
2514 if (ipimap
->i_size
>> L2PSIZE
!= imap
->im_nextiag
+ 1) {
2515 IWRITE_UNLOCK(ipimap
);
2516 IAGFREE_UNLOCK(imap
);
2517 jfs_error(imap
->im_ipimap
->i_sb
,
2518 "diNewIAG: ipimap->i_size is wrong");
2523 /* get the next avaliable iag number */
2524 iagno
= imap
->im_nextiag
;
2526 /* make sure that we have not exceeded the maximum inode
2529 if (iagno
> (MAXIAGS
- 1)) {
2530 /* release the inode map lock */
2531 IWRITE_UNLOCK(ipimap
);
2538 * synchronously append new iag page.
2540 /* determine the logical address of iag page to append */
2541 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2543 /* Allocate extent for new iag page */
2544 xlen
= sbi
->nbperpage
;
2545 if ((rc
= dbAlloc(ipimap
, 0, (s64
) xlen
, &xaddr
))) {
2546 /* release the inode map lock */
2547 IWRITE_UNLOCK(ipimap
);
2553 * start transaction of update of the inode map
2554 * addressing structure pointing to the new iag page;
2556 tid
= txBegin(sb
, COMMIT_FORCE
);
2557 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
2559 /* update the inode map addressing structure to point to it */
2561 xtInsert(tid
, ipimap
, 0, blkno
, xlen
, &xaddr
, 0))) {
2563 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2564 /* Free the blocks allocated for the iag since it was
2565 * not successfully added to the inode map
2567 dbFree(ipimap
, xaddr
, (s64
) xlen
);
2569 /* release the inode map lock */
2570 IWRITE_UNLOCK(ipimap
);
2575 /* update the inode map's inode to reflect the extension */
2576 ipimap
->i_size
+= PSIZE
;
2577 inode_add_bytes(ipimap
, PSIZE
);
2579 /* assign a buffer for the page */
2580 mp
= get_metapage(ipimap
, blkno
, PSIZE
, 0);
2583 * This is very unlikely since we just created the
2584 * extent, but let's try to handle it correctly
2586 xtTruncate(tid
, ipimap
, ipimap
->i_size
- PSIZE
,
2592 /* release the inode map lock */
2593 IWRITE_UNLOCK(ipimap
);
2598 iagp
= (struct iag
*) mp
->data
;
2601 memset(iagp
, 0, sizeof(struct iag
));
2602 iagp
->iagnum
= cpu_to_le32(iagno
);
2603 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2604 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2605 iagp
->iagfree
= cpu_to_le32(-1);
2606 iagp
->nfreeinos
= 0;
2607 iagp
->nfreeexts
= cpu_to_le32(EXTSPERIAG
);
2609 /* initialize the free inode summary map (free extent
2610 * summary map initialization handled by bzero).
2612 for (i
= 0; i
< SMAPSZ
; i
++)
2613 iagp
->inosmap
[i
] = cpu_to_le32(ONES
);
2616 * Write and sync the metapage
2621 * txCommit(COMMIT_FORCE) will synchronously write address
2622 * index pages and inode after commit in careful update order
2623 * of address index pages (right to left, bottom up);
2626 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
2629 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2631 duplicateIXtree(sb
, blkno
, xlen
, &xaddr
);
2633 /* update the next avaliable iag number */
2634 imap
->im_nextiag
+= 1;
2636 /* Add the iag to the iag free list so we don't lose the iag
2637 * if a failure happens now.
2639 imap
->im_freeiag
= iagno
;
2641 /* Until we have logredo working, we want the imap inode &
2642 * control page to be up to date.
2646 /* release the inode map lock */
2647 IWRITE_UNLOCK(ipimap
);
2650 /* obtain read lock on map */
2651 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2654 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
2655 IREAD_UNLOCK(ipimap
);
2659 iagp
= (struct iag
*) mp
->data
;
2661 /* remove the iag from the iag free list */
2662 imap
->im_freeiag
= le32_to_cpu(iagp
->iagfree
);
2663 iagp
->iagfree
= cpu_to_le32(-1);
2665 /* set the return iag number and buffer pointer */
2670 /* release the iag free lock */
2671 IAGFREE_UNLOCK(imap
);
2679 * FUNCTION: get the buffer for the specified iag within a fileset
2680 * or aggregate inode map.
2683 * imap - pointer to inode map control structure.
2684 * iagno - iag number.
2685 * bpp - point to buffer pointer to be filled in on successful
2689 * must have read lock on imap inode
2690 * (When called by diExtendFS, the filesystem is quiesced, therefore
2691 * the read lock is unnecessary.)
2697 static int diIAGRead(struct inomap
* imap
, int iagno
, struct metapage
** mpp
)
2699 struct inode
*ipimap
= imap
->im_ipimap
;
2702 /* compute the logical block number of the iag. */
2703 blkno
= IAGTOLBLK(iagno
, JFS_SBI(ipimap
->i_sb
)->l2nbperpage
);
2706 *mpp
= read_metapage(ipimap
, blkno
, PSIZE
, 0);
2715 * NAME: diFindFree()
2717 * FUNCTION: find the first free bit in a word starting at
2718 * the specified bit position.
2721 * word - word to be examined.
2722 * start - starting bit position.
2725 * bit position of first free bit in the word or 32 if
2726 * no free bits were found.
2728 static int diFindFree(u32 word
, int start
)
2732 /* scan the word for the first free bit. */
2733 for (word
<<= start
, bitno
= start
; bitno
< 32;
2734 bitno
++, word
<<= 1) {
2735 if ((word
& HIGHORDER
) == 0)
2742 * NAME: diUpdatePMap()
2744 * FUNCTION: Update the persistent map in an IAG for the allocation or
2745 * freeing of the specified inode.
2747 * PRE CONDITIONS: Working map has already been updated for allocate.
2750 * ipimap - Incore inode map inode
2751 * inum - Number of inode to mark in permanent map
2752 * is_free - If 'true' indicates inode should be marked freed, otherwise
2753 * indicates inode should be marked allocated.
2759 diUpdatePMap(struct inode
*ipimap
,
2760 unsigned long inum
, bool is_free
, struct tblock
* tblk
)
2764 struct metapage
*mp
;
2765 int iagno
, ino
, extno
, bitno
;
2766 struct inomap
*imap
;
2768 struct jfs_log
*log
;
2769 int lsn
, difft
, diffp
;
2770 unsigned long flags
;
2772 imap
= JFS_IP(ipimap
)->i_imap
;
2773 /* get the iag number containing the inode */
2774 iagno
= INOTOIAG(inum
);
2775 /* make sure that the iag is contained within the map */
2776 if (iagno
>= imap
->im_nextiag
) {
2777 jfs_error(ipimap
->i_sb
,
2778 "diUpdatePMap: the iag is outside the map");
2782 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2783 rc
= diIAGRead(imap
, iagno
, &mp
);
2784 IREAD_UNLOCK(ipimap
);
2787 metapage_wait_for_io(mp
);
2788 iagp
= (struct iag
*) mp
->data
;
2789 /* get the inode number and extent number of the inode within
2790 * the iag and the inode number within the extent.
2792 ino
= inum
& (INOSPERIAG
- 1);
2793 extno
= ino
>> L2INOSPEREXT
;
2794 bitno
= ino
& (INOSPEREXT
- 1);
2795 mask
= HIGHORDER
>> bitno
;
2797 * mark the inode free in persistent map:
2800 /* The inode should have been allocated both in working
2801 * map and in persistent map;
2802 * the inode will be freed from working map at the release
2803 * of last reference release;
2805 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2806 jfs_error(ipimap
->i_sb
,
2807 "diUpdatePMap: inode %ld not marked as "
2808 "allocated in wmap!", inum
);
2810 if (!(le32_to_cpu(iagp
->pmap
[extno
]) & mask
)) {
2811 jfs_error(ipimap
->i_sb
,
2812 "diUpdatePMap: inode %ld not marked as "
2813 "allocated in pmap!", inum
);
2815 /* update the bitmap for the extent of the freed inode */
2816 iagp
->pmap
[extno
] &= cpu_to_le32(~mask
);
2819 * mark the inode allocated in persistent map:
2822 /* The inode should be already allocated in the working map
2823 * and should be free in persistent map;
2825 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2826 release_metapage(mp
);
2827 jfs_error(ipimap
->i_sb
,
2828 "diUpdatePMap: the inode is not allocated in "
2832 if ((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) {
2833 release_metapage(mp
);
2834 jfs_error(ipimap
->i_sb
,
2835 "diUpdatePMap: the inode is not free in the "
2839 /* update the bitmap for the extent of the allocated inode */
2840 iagp
->pmap
[extno
] |= cpu_to_le32(mask
);
2846 log
= JFS_SBI(tblk
->sb
)->log
;
2847 LOGSYNC_LOCK(log
, flags
);
2849 /* inherit older/smaller lsn */
2850 logdiff(difft
, lsn
, log
);
2851 logdiff(diffp
, mp
->lsn
, log
);
2852 if (difft
< diffp
) {
2854 /* move mp after tblock in logsync list */
2855 list_move(&mp
->synclist
, &tblk
->synclist
);
2857 /* inherit younger/larger clsn */
2859 logdiff(difft
, tblk
->clsn
, log
);
2860 logdiff(diffp
, mp
->clsn
, log
);
2862 mp
->clsn
= tblk
->clsn
;
2866 /* insert mp after tblock in logsync list */
2868 list_add(&mp
->synclist
, &tblk
->synclist
);
2869 mp
->clsn
= tblk
->clsn
;
2871 LOGSYNC_UNLOCK(log
, flags
);
2879 * function: update imap for extendfs();
2881 * note: AG size has been increased s.t. each k old contiguous AGs are
2882 * coalesced into a new AG;
2884 int diExtendFS(struct inode
*ipimap
, struct inode
*ipbmap
)
2887 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
2888 struct iag
*iagp
= NULL
, *hiagp
= NULL
;
2889 struct bmap
*mp
= JFS_SBI(ipbmap
->i_sb
)->bmap
;
2890 struct metapage
*bp
, *hbp
;
2892 int numinos
, xnuminos
= 0, xnumfree
= 0;
2895 jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d",
2896 imap
->im_nextiag
, atomic_read(&imap
->im_numinos
),
2897 atomic_read(&imap
->im_numfree
));
2902 * coalesce contiguous k (newAGSize/oldAGSize) AGs;
2903 * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn;
2904 * note: new AG size = old AG size * (2**x).
2907 /* init per AG control information im_agctl[] */
2908 for (i
= 0; i
< MAXAG
; i
++) {
2909 imap
->im_agctl
[i
].inofree
= -1;
2910 imap
->im_agctl
[i
].extfree
= -1;
2911 imap
->im_agctl
[i
].numinos
= 0; /* number of backed inodes */
2912 imap
->im_agctl
[i
].numfree
= 0; /* number of free backed inodes */
2916 * process each iag page of the map.
2918 * rebuild AG Free Inode List, AG Free Inode Extent List;
2920 for (i
= 0; i
< imap
->im_nextiag
; i
++) {
2921 if ((rc
= diIAGRead(imap
, i
, &bp
))) {
2925 iagp
= (struct iag
*) bp
->data
;
2926 if (le32_to_cpu(iagp
->iagnum
) != i
) {
2927 release_metapage(bp
);
2928 jfs_error(ipimap
->i_sb
,
2929 "diExtendFs: unexpected value of iagnum");
2933 /* leave free iag in the free iag list */
2934 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2935 release_metapage(bp
);
2939 /* agstart that computes to the same ag is treated as same; */
2940 agstart
= le64_to_cpu(iagp
->agstart
);
2941 /* iagp->agstart = agstart & ~(mp->db_agsize - 1); */
2942 n
= agstart
>> mp
->db_agl2size
;
2944 /* compute backed inodes */
2945 numinos
= (EXTSPERIAG
- le32_to_cpu(iagp
->nfreeexts
))
2948 /* merge AG backed inodes */
2949 imap
->im_agctl
[n
].numinos
+= numinos
;
2950 xnuminos
+= numinos
;
2953 /* if any backed free inodes, insert at AG free inode list */
2954 if ((int) le32_to_cpu(iagp
->nfreeinos
) > 0) {
2955 if ((head
= imap
->im_agctl
[n
].inofree
) == -1) {
2956 iagp
->inofreefwd
= cpu_to_le32(-1);
2957 iagp
->inofreeback
= cpu_to_le32(-1);
2959 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2963 hiagp
= (struct iag
*) hbp
->data
;
2964 hiagp
->inofreeback
= iagp
->iagnum
;
2965 iagp
->inofreefwd
= cpu_to_le32(head
);
2966 iagp
->inofreeback
= cpu_to_le32(-1);
2967 write_metapage(hbp
);
2970 imap
->im_agctl
[n
].inofree
=
2971 le32_to_cpu(iagp
->iagnum
);
2973 /* merge AG backed free inodes */
2974 imap
->im_agctl
[n
].numfree
+=
2975 le32_to_cpu(iagp
->nfreeinos
);
2976 xnumfree
+= le32_to_cpu(iagp
->nfreeinos
);
2979 /* if any free extents, insert at AG free extent list */
2980 if (le32_to_cpu(iagp
->nfreeexts
) > 0) {
2981 if ((head
= imap
->im_agctl
[n
].extfree
) == -1) {
2982 iagp
->extfreefwd
= cpu_to_le32(-1);
2983 iagp
->extfreeback
= cpu_to_le32(-1);
2985 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2989 hiagp
= (struct iag
*) hbp
->data
;
2990 hiagp
->extfreeback
= iagp
->iagnum
;
2991 iagp
->extfreefwd
= cpu_to_le32(head
);
2992 iagp
->extfreeback
= cpu_to_le32(-1);
2993 write_metapage(hbp
);
2996 imap
->im_agctl
[n
].extfree
=
2997 le32_to_cpu(iagp
->iagnum
);
3004 if (xnuminos
!= atomic_read(&imap
->im_numinos
) ||
3005 xnumfree
!= atomic_read(&imap
->im_numfree
)) {
3006 jfs_error(ipimap
->i_sb
,
3007 "diExtendFs: numinos or numfree incorrect");
3018 * serialization: IWRITE_LOCK held on entry/exit
3020 * note: shadow page with regular inode (rel.2);
3022 static void duplicateIXtree(struct super_block
*sb
, s64 blkno
,
3023 int xlen
, s64
*xaddr
)
3025 struct jfs_superblock
*j_sb
;
3026 struct buffer_head
*bh
;
3030 /* if AIT2 ipmap2 is bad, do not try to update it */
3031 if (JFS_SBI(sb
)->mntflag
& JFS_BAD_SAIT
) /* s_flag */
3033 ip
= diReadSpecial(sb
, FILESYSTEM_I
, 1);
3035 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
3036 if (readSuper(sb
, &bh
))
3038 j_sb
= (struct jfs_superblock
*)bh
->b_data
;
3039 j_sb
->s_flag
|= cpu_to_le32(JFS_BAD_SAIT
);
3041 mark_buffer_dirty(bh
);
3042 sync_dirty_buffer(bh
);
3047 /* start transaction */
3048 tid
= txBegin(sb
, COMMIT_FORCE
);
3049 /* update the inode map addressing structure to point to it */
3050 if (xtInsert(tid
, ip
, 0, blkno
, xlen
, xaddr
, 0)) {
3051 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
3056 /* update the inode map's inode to reflect the extension */
3057 ip
->i_size
+= PSIZE
;
3058 inode_add_bytes(ip
, PSIZE
);
3059 txCommit(tid
, 1, &ip
, COMMIT_FORCE
);
3066 * NAME: copy_from_dinode()
3068 * FUNCTION: Copies inode info from disk inode to in-memory inode
3072 * -ENOMEM - insufficient memory
3074 static int copy_from_dinode(struct dinode
* dip
, struct inode
*ip
)
3076 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3077 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3079 jfs_ip
->fileset
= le32_to_cpu(dip
->di_fileset
);
3080 jfs_ip
->mode2
= le32_to_cpu(dip
->di_mode
);
3081 jfs_set_inode_flags(ip
);
3083 ip
->i_mode
= le32_to_cpu(dip
->di_mode
) & 0xffff;
3084 if (sbi
->umask
!= -1) {
3085 ip
->i_mode
= (ip
->i_mode
& ~0777) | (0777 & ~sbi
->umask
);
3086 /* For directories, add x permission if r is allowed by umask */
3087 if (S_ISDIR(ip
->i_mode
)) {
3088 if (ip
->i_mode
& 0400)
3090 if (ip
->i_mode
& 0040)
3092 if (ip
->i_mode
& 0004)
3096 ip
->i_nlink
= le32_to_cpu(dip
->di_nlink
);
3098 jfs_ip
->saved_uid
= le32_to_cpu(dip
->di_uid
);
3100 ip
->i_uid
= jfs_ip
->saved_uid
;
3102 ip
->i_uid
= sbi
->uid
;
3105 jfs_ip
->saved_gid
= le32_to_cpu(dip
->di_gid
);
3107 ip
->i_gid
= jfs_ip
->saved_gid
;
3109 ip
->i_gid
= sbi
->gid
;
3112 ip
->i_size
= le64_to_cpu(dip
->di_size
);
3113 ip
->i_atime
.tv_sec
= le32_to_cpu(dip
->di_atime
.tv_sec
);
3114 ip
->i_atime
.tv_nsec
= le32_to_cpu(dip
->di_atime
.tv_nsec
);
3115 ip
->i_mtime
.tv_sec
= le32_to_cpu(dip
->di_mtime
.tv_sec
);
3116 ip
->i_mtime
.tv_nsec
= le32_to_cpu(dip
->di_mtime
.tv_nsec
);
3117 ip
->i_ctime
.tv_sec
= le32_to_cpu(dip
->di_ctime
.tv_sec
);
3118 ip
->i_ctime
.tv_nsec
= le32_to_cpu(dip
->di_ctime
.tv_nsec
);
3119 ip
->i_blocks
= LBLK2PBLK(ip
->i_sb
, le64_to_cpu(dip
->di_nblocks
));
3120 ip
->i_generation
= le32_to_cpu(dip
->di_gen
);
3122 jfs_ip
->ixpxd
= dip
->di_ixpxd
; /* in-memory pxd's are little-endian */
3123 jfs_ip
->acl
= dip
->di_acl
; /* as are dxd's */
3124 jfs_ip
->ea
= dip
->di_ea
;
3125 jfs_ip
->next_index
= le32_to_cpu(dip
->di_next_index
);
3126 jfs_ip
->otime
= le32_to_cpu(dip
->di_otime
.tv_sec
);
3127 jfs_ip
->acltype
= le32_to_cpu(dip
->di_acltype
);
3129 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
)) {
3130 jfs_ip
->dev
= le32_to_cpu(dip
->di_rdev
);
3131 ip
->i_rdev
= new_decode_dev(jfs_ip
->dev
);
3134 if (S_ISDIR(ip
->i_mode
)) {
3135 memcpy(&jfs_ip
->i_dirtable
, &dip
->di_dirtable
, 384);
3136 } else if (S_ISREG(ip
->i_mode
) || S_ISLNK(ip
->i_mode
)) {
3137 memcpy(&jfs_ip
->i_xtroot
, &dip
->di_xtroot
, 288);
3139 memcpy(&jfs_ip
->i_inline_ea
, &dip
->di_inlineea
, 128);
3141 /* Zero the in-memory-only stuff */
3143 jfs_ip
->btindex
= 0;
3144 jfs_ip
->btorder
= 0;
3147 jfs_ip
->atlhead
= 0;
3148 jfs_ip
->atltail
= 0;
3154 * NAME: copy_to_dinode()
3156 * FUNCTION: Copies inode info from in-memory inode to disk inode
3158 static void copy_to_dinode(struct dinode
* dip
, struct inode
*ip
)
3160 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3161 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3163 dip
->di_fileset
= cpu_to_le32(jfs_ip
->fileset
);
3164 dip
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
3165 dip
->di_number
= cpu_to_le32(ip
->i_ino
);
3166 dip
->di_gen
= cpu_to_le32(ip
->i_generation
);
3167 dip
->di_size
= cpu_to_le64(ip
->i_size
);
3168 dip
->di_nblocks
= cpu_to_le64(PBLK2LBLK(ip
->i_sb
, ip
->i_blocks
));
3169 dip
->di_nlink
= cpu_to_le32(ip
->i_nlink
);
3171 dip
->di_uid
= cpu_to_le32(ip
->i_uid
);
3173 dip
->di_uid
= cpu_to_le32(jfs_ip
->saved_uid
);
3175 dip
->di_gid
= cpu_to_le32(ip
->i_gid
);
3177 dip
->di_gid
= cpu_to_le32(jfs_ip
->saved_gid
);
3178 jfs_get_inode_flags(jfs_ip
);
3180 * mode2 is only needed for storing the higher order bits.
3181 * Trust i_mode for the lower order ones
3183 if (sbi
->umask
== -1)
3184 dip
->di_mode
= cpu_to_le32((jfs_ip
->mode2
& 0xffff0000) |
3186 else /* Leave the original permissions alone */
3187 dip
->di_mode
= cpu_to_le32(jfs_ip
->mode2
);
3189 dip
->di_atime
.tv_sec
= cpu_to_le32(ip
->i_atime
.tv_sec
);
3190 dip
->di_atime
.tv_nsec
= cpu_to_le32(ip
->i_atime
.tv_nsec
);
3191 dip
->di_ctime
.tv_sec
= cpu_to_le32(ip
->i_ctime
.tv_sec
);
3192 dip
->di_ctime
.tv_nsec
= cpu_to_le32(ip
->i_ctime
.tv_nsec
);
3193 dip
->di_mtime
.tv_sec
= cpu_to_le32(ip
->i_mtime
.tv_sec
);
3194 dip
->di_mtime
.tv_nsec
= cpu_to_le32(ip
->i_mtime
.tv_nsec
);
3195 dip
->di_ixpxd
= jfs_ip
->ixpxd
; /* in-memory pxd's are little-endian */
3196 dip
->di_acl
= jfs_ip
->acl
; /* as are dxd's */
3197 dip
->di_ea
= jfs_ip
->ea
;
3198 dip
->di_next_index
= cpu_to_le32(jfs_ip
->next_index
);
3199 dip
->di_otime
.tv_sec
= cpu_to_le32(jfs_ip
->otime
);
3200 dip
->di_otime
.tv_nsec
= 0;
3201 dip
->di_acltype
= cpu_to_le32(jfs_ip
->acltype
);
3202 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
))
3203 dip
->di_rdev
= cpu_to_le32(jfs_ip
->dev
);
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