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1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) International Business Machines Corp., 2000-2004
7 * jfs_imap.c: inode allocation map manager
10 * Each AG has a simple lock which is used to control the serialization of
11 * the AG level lists. This lock should be taken first whenever an AG
12 * level list will be modified or accessed.
14 * Each IAG is locked by obtaining the buffer for the IAG page.
16 * There is also a inode lock for the inode map inode. A read lock needs to
17 * be taken whenever an IAG is read from the map or the global level
18 * information is read. A write lock needs to be taken whenever the global
19 * level information is modified or an atomic operation needs to be used.
21 * If more than one IAG is read at one time, the read lock may not
22 * be given up until all of the IAG's are read. Otherwise, a deadlock
23 * may occur when trying to obtain the read lock while another thread
24 * holding the read lock is waiting on the IAG already being held.
26 * The control page of the inode map is read into memory by diMount().
27 * Thereafter it should only be modified in memory and then it will be
28 * written out when the filesystem is unmounted by diUnmount().
32 #include <linux/buffer_head.h>
33 #include <linux/pagemap.h>
34 #include <linux/quotaops.h>
35 #include <linux/slab.h>
37 #include "jfs_incore.h"
38 #include "jfs_inode.h"
39 #include "jfs_filsys.h"
40 #include "jfs_dinode.h"
43 #include "jfs_metapage.h"
44 #include "jfs_superblock.h"
45 #include "jfs_debug.h"
50 /* iag free list lock */
51 #define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock)
52 #define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock)
53 #define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock)
55 /* per ag iag list locks */
56 #define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index]))
57 #define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno])
58 #define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno])
63 static int diAllocAG(struct inomap
*, int, bool, struct inode
*);
64 static int diAllocAny(struct inomap
*, int, bool, struct inode
*);
65 static int diAllocBit(struct inomap
*, struct iag
*, int);
66 static int diAllocExt(struct inomap
*, int, struct inode
*);
67 static int diAllocIno(struct inomap
*, int, struct inode
*);
68 static int diFindFree(u32
, int);
69 static int diNewExt(struct inomap
*, struct iag
*, int);
70 static int diNewIAG(struct inomap
*, int *, int, struct metapage
**);
71 static void duplicateIXtree(struct super_block
*, s64
, int, s64
*);
73 static int diIAGRead(struct inomap
* imap
, int, struct metapage
**);
74 static int copy_from_dinode(struct dinode
*, struct inode
*);
75 static void copy_to_dinode(struct dinode
*, struct inode
*);
80 * FUNCTION: initialize the incore inode map control structures for
81 * a fileset or aggregate init time.
83 * the inode map's control structure (dinomap) is
84 * brought in from disk and placed in virtual memory.
87 * ipimap - pointer to inode map inode for the aggregate or fileset.
91 * -ENOMEM - insufficient free virtual memory.
94 int diMount(struct inode
*ipimap
)
99 struct dinomap_disk
*dinom_le
;
102 * allocate/initialize the in-memory inode map control structure
104 /* allocate the in-memory inode map control structure. */
105 imap
= kmalloc(sizeof(struct inomap
), GFP_KERNEL
);
109 /* read the on-disk inode map control structure. */
111 mp
= read_metapage(ipimap
,
112 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
119 /* copy the on-disk version to the in-memory version. */
120 dinom_le
= (struct dinomap_disk
*) mp
->data
;
121 imap
->im_freeiag
= le32_to_cpu(dinom_le
->in_freeiag
);
122 imap
->im_nextiag
= le32_to_cpu(dinom_le
->in_nextiag
);
123 atomic_set(&imap
->im_numinos
, le32_to_cpu(dinom_le
->in_numinos
));
124 atomic_set(&imap
->im_numfree
, le32_to_cpu(dinom_le
->in_numfree
));
125 imap
->im_nbperiext
= le32_to_cpu(dinom_le
->in_nbperiext
);
126 imap
->im_l2nbperiext
= le32_to_cpu(dinom_le
->in_l2nbperiext
);
127 for (index
= 0; index
< MAXAG
; index
++) {
128 imap
->im_agctl
[index
].inofree
=
129 le32_to_cpu(dinom_le
->in_agctl
[index
].inofree
);
130 imap
->im_agctl
[index
].extfree
=
131 le32_to_cpu(dinom_le
->in_agctl
[index
].extfree
);
132 imap
->im_agctl
[index
].numinos
=
133 le32_to_cpu(dinom_le
->in_agctl
[index
].numinos
);
134 imap
->im_agctl
[index
].numfree
=
135 le32_to_cpu(dinom_le
->in_agctl
[index
].numfree
);
138 /* release the buffer. */
139 release_metapage(mp
);
142 * allocate/initialize inode allocation map locks
144 /* allocate and init iag free list lock */
145 IAGFREE_LOCK_INIT(imap
);
147 /* allocate and init ag list locks */
148 for (index
= 0; index
< MAXAG
; index
++) {
149 AG_LOCK_INIT(imap
, index
);
152 /* bind the inode map inode and inode map control structure
155 imap
->im_ipimap
= ipimap
;
156 JFS_IP(ipimap
)->i_imap
= imap
;
165 * FUNCTION: write to disk the incore inode map control structures for
166 * a fileset or aggregate at unmount time.
169 * ipimap - pointer to inode map inode for the aggregate or fileset.
173 * -ENOMEM - insufficient free virtual memory.
176 int diUnmount(struct inode
*ipimap
, int mounterror
)
178 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
181 * update the on-disk inode map control structure
184 if (!(mounterror
|| isReadOnly(ipimap
)))
188 * Invalidate the page cache buffers
190 truncate_inode_pages(ipimap
->i_mapping
, 0);
193 * free in-memory control structure
204 int diSync(struct inode
*ipimap
)
206 struct dinomap_disk
*dinom_le
;
207 struct inomap
*imp
= JFS_IP(ipimap
)->i_imap
;
212 * write imap global conrol page
214 /* read the on-disk inode map control structure */
215 mp
= get_metapage(ipimap
,
216 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
219 jfs_err("diSync: get_metapage failed!");
223 /* copy the in-memory version to the on-disk version */
224 dinom_le
= (struct dinomap_disk
*) mp
->data
;
225 dinom_le
->in_freeiag
= cpu_to_le32(imp
->im_freeiag
);
226 dinom_le
->in_nextiag
= cpu_to_le32(imp
->im_nextiag
);
227 dinom_le
->in_numinos
= cpu_to_le32(atomic_read(&imp
->im_numinos
));
228 dinom_le
->in_numfree
= cpu_to_le32(atomic_read(&imp
->im_numfree
));
229 dinom_le
->in_nbperiext
= cpu_to_le32(imp
->im_nbperiext
);
230 dinom_le
->in_l2nbperiext
= cpu_to_le32(imp
->im_l2nbperiext
);
231 for (index
= 0; index
< MAXAG
; index
++) {
232 dinom_le
->in_agctl
[index
].inofree
=
233 cpu_to_le32(imp
->im_agctl
[index
].inofree
);
234 dinom_le
->in_agctl
[index
].extfree
=
235 cpu_to_le32(imp
->im_agctl
[index
].extfree
);
236 dinom_le
->in_agctl
[index
].numinos
=
237 cpu_to_le32(imp
->im_agctl
[index
].numinos
);
238 dinom_le
->in_agctl
[index
].numfree
=
239 cpu_to_le32(imp
->im_agctl
[index
].numfree
);
242 /* write out the control structure */
246 * write out dirty pages of imap
248 filemap_write_and_wait(ipimap
->i_mapping
);
250 diWriteSpecial(ipimap
, 0);
259 * FUNCTION: initialize an incore inode from disk.
261 * on entry, the specifed incore inode should itself
262 * specify the disk inode number corresponding to the
263 * incore inode (i.e. i_number should be initialized).
265 * this routine handles incore inode initialization for
266 * both "special" and "regular" inodes. special inodes
267 * are those required early in the mount process and
268 * require special handling since much of the file system
269 * is not yet initialized. these "special" inodes are
270 * identified by a NULL inode map inode pointer and are
271 * actually initialized by a call to diReadSpecial().
273 * for regular inodes, the iag describing the disk inode
274 * is read from disk to determine the inode extent address
275 * for the disk inode. with the inode extent address in
276 * hand, the page of the extent that contains the disk
277 * inode is read and the disk inode is copied to the
281 * ip - pointer to incore inode to be initialized from disk.
286 * -ENOMEM - insufficient memory
289 int diRead(struct inode
*ip
)
291 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
292 int iagno
, ino
, extno
, rc
;
293 struct inode
*ipimap
;
301 unsigned long pageno
;
304 jfs_info("diRead: ino = %ld", ip
->i_ino
);
306 ipimap
= sbi
->ipimap
;
307 JFS_IP(ip
)->ipimap
= ipimap
;
309 /* determine the iag number for this inode (number) */
310 iagno
= INOTOIAG(ip
->i_ino
);
313 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
314 imap
= JFS_IP(ipimap
)->i_imap
;
315 rc
= diIAGRead(imap
, iagno
, &mp
);
316 IREAD_UNLOCK(ipimap
);
318 jfs_err("diRead: diIAGRead returned %d", rc
);
322 iagp
= (struct iag
*) mp
->data
;
324 /* determine inode extent that holds the disk inode */
325 ino
= ip
->i_ino
& (INOSPERIAG
- 1);
326 extno
= ino
>> L2INOSPEREXT
;
328 if ((lengthPXD(&iagp
->inoext
[extno
]) != imap
->im_nbperiext
) ||
329 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
330 release_metapage(mp
);
334 /* get disk block number of the page within the inode extent
335 * that holds the disk inode.
337 blkno
= INOPBLK(&iagp
->inoext
[extno
], ino
, sbi
->l2nbperpage
);
339 /* get the ag for the iag */
340 agstart
= le64_to_cpu(iagp
->agstart
);
342 release_metapage(mp
);
344 rel_inode
= (ino
& (INOSPERPAGE
- 1));
345 pageno
= blkno
>> sbi
->l2nbperpage
;
347 if ((block_offset
= ((u32
) blkno
& (sbi
->nbperpage
- 1)))) {
349 * OS/2 didn't always align inode extents on page boundaries
352 (sbi
->nbperpage
- block_offset
) << sbi
->l2niperblk
;
354 if (rel_inode
< inodes_left
)
355 rel_inode
+= block_offset
<< sbi
->l2niperblk
;
358 rel_inode
-= inodes_left
;
362 /* read the page of disk inode */
363 mp
= read_metapage(ipimap
, pageno
<< sbi
->l2nbperpage
, PSIZE
, 1);
365 jfs_err("diRead: read_metapage failed");
369 /* locate the disk inode requested */
370 dp
= (struct dinode
*) mp
->data
;
373 if (ip
->i_ino
!= le32_to_cpu(dp
->di_number
)) {
374 jfs_error(ip
->i_sb
, "i_ino != di_number\n");
376 } else if (le32_to_cpu(dp
->di_nlink
) == 0)
379 /* copy the disk inode to the in-memory inode */
380 rc
= copy_from_dinode(dp
, ip
);
382 release_metapage(mp
);
384 /* set the ag for the inode */
385 JFS_IP(ip
)->agstart
= agstart
;
386 JFS_IP(ip
)->active_ag
= -1;
393 * NAME: diReadSpecial()
395 * FUNCTION: initialize a 'special' inode from disk.
397 * this routines handles aggregate level inodes. The
398 * inode cache cannot differentiate between the
399 * aggregate inodes and the filesystem inodes, so we
400 * handle these here. We don't actually use the aggregate
401 * inode map, since these inodes are at a fixed location
402 * and in some cases the aggregate inode map isn't initialized
406 * sb - filesystem superblock
407 * inum - aggregate inode number
408 * secondary - 1 if secondary aggregate inode table
411 * new inode - success
414 struct inode
*diReadSpecial(struct super_block
*sb
, ino_t inum
, int secondary
)
416 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
424 jfs_err("diReadSpecial: new_inode returned NULL!");
429 address
= addressPXD(&sbi
->ait2
) >> sbi
->l2nbperpage
;
430 JFS_IP(ip
)->ipimap
= sbi
->ipaimap2
;
432 address
= AITBL_OFF
>> L2PSIZE
;
433 JFS_IP(ip
)->ipimap
= sbi
->ipaimap
;
436 ASSERT(inum
< INOSPEREXT
);
440 address
+= inum
>> 3; /* 8 inodes per 4K page */
442 /* read the page of fixed disk inode (AIT) in raw mode */
443 mp
= read_metapage(ip
, address
<< sbi
->l2nbperpage
, PSIZE
, 1);
445 set_nlink(ip
, 1); /* Don't want iput() deleting it */
450 /* get the pointer to the disk inode of interest */
451 dp
= (struct dinode
*) (mp
->data
);
452 dp
+= inum
% 8; /* 8 inodes per 4K page */
454 /* copy on-disk inode to in-memory inode */
455 if ((copy_from_dinode(dp
, ip
)) != 0) {
456 /* handle bad return by returning NULL for ip */
457 set_nlink(ip
, 1); /* Don't want iput() deleting it */
459 /* release the page */
460 release_metapage(mp
);
465 ip
->i_mapping
->a_ops
= &jfs_metapage_aops
;
466 mapping_set_gfp_mask(ip
->i_mapping
, GFP_NOFS
);
468 /* Allocations to metadata inodes should not affect quotas */
469 ip
->i_flags
|= S_NOQUOTA
;
471 if ((inum
== FILESYSTEM_I
) && (JFS_IP(ip
)->ipimap
== sbi
->ipaimap
)) {
472 sbi
->gengen
= le32_to_cpu(dp
->di_gengen
);
473 sbi
->inostamp
= le32_to_cpu(dp
->di_inostamp
);
476 /* release the page */
477 release_metapage(mp
);
485 * NAME: diWriteSpecial()
487 * FUNCTION: Write the special inode to disk
491 * secondary - 1 if secondary aggregate inode table
493 * RETURN VALUES: none
496 void diWriteSpecial(struct inode
*ip
, int secondary
)
498 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
501 ino_t inum
= ip
->i_ino
;
505 address
= addressPXD(&sbi
->ait2
) >> sbi
->l2nbperpage
;
507 address
= AITBL_OFF
>> L2PSIZE
;
509 ASSERT(inum
< INOSPEREXT
);
511 address
+= inum
>> 3; /* 8 inodes per 4K page */
513 /* read the page of fixed disk inode (AIT) in raw mode */
514 mp
= read_metapage(ip
, address
<< sbi
->l2nbperpage
, PSIZE
, 1);
516 jfs_err("diWriteSpecial: failed to read aggregate inode extent!");
520 /* get the pointer to the disk inode of interest */
521 dp
= (struct dinode
*) (mp
->data
);
522 dp
+= inum
% 8; /* 8 inodes per 4K page */
524 /* copy on-disk inode to in-memory inode */
525 copy_to_dinode(dp
, ip
);
526 memcpy(&dp
->di_xtroot
, &JFS_IP(ip
)->i_xtroot
, 288);
528 if (inum
== FILESYSTEM_I
)
529 dp
->di_gengen
= cpu_to_le32(sbi
->gengen
);
536 * NAME: diFreeSpecial()
538 * FUNCTION: Free allocated space for special inode
540 void diFreeSpecial(struct inode
*ip
)
543 jfs_err("diFreeSpecial called with NULL ip!");
546 filemap_write_and_wait(ip
->i_mapping
);
547 truncate_inode_pages(ip
->i_mapping
, 0);
556 * FUNCTION: write the on-disk inode portion of the in-memory inode
557 * to its corresponding on-disk inode.
559 * on entry, the specifed incore inode should itself
560 * specify the disk inode number corresponding to the
561 * incore inode (i.e. i_number should be initialized).
563 * the inode contains the inode extent address for the disk
564 * inode. with the inode extent address in hand, the
565 * page of the extent that contains the disk inode is
566 * read and the disk inode portion of the incore inode
567 * is copied to the disk inode.
570 * tid - transacation id
571 * ip - pointer to incore inode to be written to the inode extent.
577 int diWrite(tid_t tid
, struct inode
*ip
)
579 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
580 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
588 unsigned long pageno
;
591 struct inode
*ipimap
;
594 struct tlock
*ditlck
, *tlck
;
595 struct linelock
*dilinelock
, *ilinelock
;
599 ipimap
= jfs_ip
->ipimap
;
601 ino
= ip
->i_ino
& (INOSPERIAG
- 1);
603 if (!addressPXD(&(jfs_ip
->ixpxd
)) ||
604 (lengthPXD(&(jfs_ip
->ixpxd
)) !=
605 JFS_IP(ipimap
)->i_imap
->im_nbperiext
)) {
606 jfs_error(ip
->i_sb
, "ixpxd invalid\n");
611 * read the page of disk inode containing the specified inode:
613 /* compute the block address of the page */
614 blkno
= INOPBLK(&(jfs_ip
->ixpxd
), ino
, sbi
->l2nbperpage
);
616 rel_inode
= (ino
& (INOSPERPAGE
- 1));
617 pageno
= blkno
>> sbi
->l2nbperpage
;
619 if ((block_offset
= ((u32
) blkno
& (sbi
->nbperpage
- 1)))) {
621 * OS/2 didn't always align inode extents on page boundaries
624 (sbi
->nbperpage
- block_offset
) << sbi
->l2niperblk
;
626 if (rel_inode
< inodes_left
)
627 rel_inode
+= block_offset
<< sbi
->l2niperblk
;
630 rel_inode
-= inodes_left
;
633 /* read the page of disk inode */
635 mp
= read_metapage(ipimap
, pageno
<< sbi
->l2nbperpage
, PSIZE
, 1);
639 /* get the pointer to the disk inode */
640 dp
= (struct dinode
*) mp
->data
;
643 dioffset
= (ino
& (INOSPERPAGE
- 1)) << L2DISIZE
;
646 * acquire transaction lock on the on-disk inode;
647 * N.B. tlock is acquired on ipimap not ip;
650 txLock(tid
, ipimap
, mp
, tlckINODE
| tlckENTRY
)) == NULL
)
652 dilinelock
= (struct linelock
*) & ditlck
->lock
;
655 * copy btree root from in-memory inode to on-disk inode
657 * (tlock is taken from inline B+-tree root in in-memory
658 * inode when the B+-tree root is updated, which is pointed
659 * by jfs_ip->blid as well as being on tx tlock list)
661 * further processing of btree root is based on the copy
662 * in in-memory inode, where txLog() will log from, and,
663 * for xtree root, txUpdateMap() will update map and reset
667 if (S_ISDIR(ip
->i_mode
) && (lid
= jfs_ip
->xtlid
)) {
669 * This is the special xtree inside the directory for storing
670 * the directory table
676 tlck
= lid_to_tlock(lid
);
677 assert(tlck
->type
& tlckXTREE
);
678 tlck
->type
|= tlckBTROOT
;
680 ilinelock
= (struct linelock
*) & tlck
->lock
;
683 * copy xtree root from inode to dinode:
685 p
= &jfs_ip
->i_xtroot
;
686 xp
= (xtpage_t
*) &dp
->di_dirtable
;
688 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
689 memcpy(&xp
->xad
[lv
->offset
], &p
->xad
[lv
->offset
],
690 lv
->length
<< L2XTSLOTSIZE
);
693 /* reset on-disk (metadata page) xtree XAD_NEW bit */
694 xad
= &xp
->xad
[XTENTRYSTART
];
695 for (n
= XTENTRYSTART
;
696 n
< le16_to_cpu(xp
->header
.nextindex
); n
++, xad
++)
697 if (xad
->flag
& (XAD_NEW
| XAD_EXTENDED
))
698 xad
->flag
&= ~(XAD_NEW
| XAD_EXTENDED
);
701 if ((lid
= jfs_ip
->blid
) == 0)
705 tlck
= lid_to_tlock(lid
);
707 tlck
->type
|= tlckBTROOT
;
709 ilinelock
= (struct linelock
*) & tlck
->lock
;
712 * regular file: 16 byte (XAD slot) granularity
714 if (type
& tlckXTREE
) {
719 * copy xtree root from inode to dinode:
721 p
= &jfs_ip
->i_xtroot
;
724 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
725 memcpy(&xp
->xad
[lv
->offset
], &p
->xad
[lv
->offset
],
726 lv
->length
<< L2XTSLOTSIZE
);
729 /* reset on-disk (metadata page) xtree XAD_NEW bit */
730 xad
= &xp
->xad
[XTENTRYSTART
];
731 for (n
= XTENTRYSTART
;
732 n
< le16_to_cpu(xp
->header
.nextindex
); n
++, xad
++)
733 if (xad
->flag
& (XAD_NEW
| XAD_EXTENDED
))
734 xad
->flag
&= ~(XAD_NEW
| XAD_EXTENDED
);
737 * directory: 32 byte (directory entry slot) granularity
739 else if (type
& tlckDTREE
) {
743 * copy dtree root from inode to dinode:
745 p
= (dtpage_t
*) &jfs_ip
->i_dtroot
;
746 xp
= (dtpage_t
*) & dp
->di_dtroot
;
748 for (n
= 0; n
< ilinelock
->index
; n
++, lv
++) {
749 memcpy(&xp
->slot
[lv
->offset
], &p
->slot
[lv
->offset
],
750 lv
->length
<< L2DTSLOTSIZE
);
753 jfs_err("diWrite: UFO tlock");
758 * copy inline symlink from in-memory inode to on-disk inode
760 if (S_ISLNK(ip
->i_mode
) && ip
->i_size
< IDATASIZE
) {
761 lv
= & dilinelock
->lv
[dilinelock
->index
];
762 lv
->offset
= (dioffset
+ 2 * 128) >> L2INODESLOTSIZE
;
764 memcpy(&dp
->di_inline_all
, jfs_ip
->i_inline_all
, IDATASIZE
);
768 * copy inline data from in-memory inode to on-disk inode:
769 * 128 byte slot granularity
771 if (test_cflag(COMMIT_Inlineea
, ip
)) {
772 lv
= & dilinelock
->lv
[dilinelock
->index
];
773 lv
->offset
= (dioffset
+ 3 * 128) >> L2INODESLOTSIZE
;
775 memcpy(&dp
->di_inlineea
, jfs_ip
->i_inline_ea
, INODESLOTSIZE
);
778 clear_cflag(COMMIT_Inlineea
, ip
);
782 * lock/copy inode base: 128 byte slot granularity
784 lv
= & dilinelock
->lv
[dilinelock
->index
];
785 lv
->offset
= dioffset
>> L2INODESLOTSIZE
;
786 copy_to_dinode(dp
, ip
);
787 if (test_and_clear_cflag(COMMIT_Dirtable
, ip
)) {
789 memcpy(&dp
->di_dirtable
, &jfs_ip
->i_dirtable
, 96);
794 /* release the buffer holding the updated on-disk inode.
795 * the buffer will be later written by commit processing.
806 * FUNCTION: free a specified inode from the inode working map
807 * for a fileset or aggregate.
809 * if the inode to be freed represents the first (only)
810 * free inode within the iag, the iag will be placed on
811 * the ag free inode list.
813 * freeing the inode will cause the inode extent to be
814 * freed if the inode is the only allocated inode within
815 * the extent. in this case all the disk resource backing
816 * up the inode extent will be freed. in addition, the iag
817 * will be placed on the ag extent free list if the extent
818 * is the first free extent in the iag. if freeing the
819 * extent also means that no free inodes will exist for
820 * the iag, the iag will also be removed from the ag free
823 * the iag describing the inode will be freed if the extent
824 * is to be freed and it is the only backed extent within
825 * the iag. in this case, the iag will be removed from the
826 * ag free extent list and ag free inode list and placed on
827 * the inode map's free iag list.
829 * a careful update approach is used to provide consistency
830 * in the face of updates to multiple buffers. under this
831 * approach, all required buffers are obtained before making
832 * any updates and are held until all updates are complete.
835 * ip - inode to be freed.
841 int diFree(struct inode
*ip
)
844 ino_t inum
= ip
->i_ino
;
845 struct iag
*iagp
, *aiagp
, *biagp
, *ciagp
, *diagp
;
846 struct metapage
*mp
, *amp
, *bmp
, *cmp
, *dmp
;
847 int iagno
, ino
, extno
, bitno
, sword
, agno
;
850 struct inode
*ipimap
= JFS_SBI(ip
->i_sb
)->ipimap
;
851 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
854 struct inode
*iplist
[3];
856 struct pxd_lock
*pxdlock
;
859 * This is just to suppress compiler warnings. The same logic that
860 * references these variables is used to initialize them.
862 aiagp
= biagp
= ciagp
= diagp
= NULL
;
864 /* get the iag number containing the inode.
866 iagno
= INOTOIAG(inum
);
868 /* make sure that the iag is contained within
871 if (iagno
>= imap
->im_nextiag
) {
872 print_hex_dump(KERN_ERR
, "imap: ", DUMP_PREFIX_ADDRESS
, 16, 4,
874 jfs_error(ip
->i_sb
, "inum = %d, iagno = %d, nextiag = %d\n",
875 (uint
) inum
, iagno
, imap
->im_nextiag
);
879 /* get the allocation group for this ino.
881 agno
= BLKTOAG(JFS_IP(ip
)->agstart
, JFS_SBI(ip
->i_sb
));
883 /* Lock the AG specific inode map information
887 /* Obtain read lock in imap inode. Don't release it until we have
888 * read all of the IAG's that we are going to.
890 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
894 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
895 IREAD_UNLOCK(ipimap
);
896 AG_UNLOCK(imap
, agno
);
899 iagp
= (struct iag
*) mp
->data
;
901 /* get the inode number and extent number of the inode within
902 * the iag and the inode number within the extent.
904 ino
= inum
& (INOSPERIAG
- 1);
905 extno
= ino
>> L2INOSPEREXT
;
906 bitno
= ino
& (INOSPEREXT
- 1);
907 mask
= HIGHORDER
>> bitno
;
909 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
910 jfs_error(ip
->i_sb
, "wmap shows inode already free\n");
913 if (!addressPXD(&iagp
->inoext
[extno
])) {
914 release_metapage(mp
);
915 IREAD_UNLOCK(ipimap
);
916 AG_UNLOCK(imap
, agno
);
917 jfs_error(ip
->i_sb
, "invalid inoext\n");
921 /* compute the bitmap for the extent reflecting the freed inode.
923 bitmap
= le32_to_cpu(iagp
->wmap
[extno
]) & ~mask
;
925 if (imap
->im_agctl
[agno
].numfree
> imap
->im_agctl
[agno
].numinos
) {
926 release_metapage(mp
);
927 IREAD_UNLOCK(ipimap
);
928 AG_UNLOCK(imap
, agno
);
929 jfs_error(ip
->i_sb
, "numfree > numinos\n");
933 * inode extent still has some inodes or below low water mark:
934 * keep the inode extent;
937 imap
->im_agctl
[agno
].numfree
< 96 ||
938 (imap
->im_agctl
[agno
].numfree
< 288 &&
939 (((imap
->im_agctl
[agno
].numfree
* 100) /
940 imap
->im_agctl
[agno
].numinos
) <= 25))) {
941 /* if the iag currently has no free inodes (i.e.,
942 * the inode being freed is the first free inode of iag),
943 * insert the iag at head of the inode free list for the ag.
945 if (iagp
->nfreeinos
== 0) {
946 /* check if there are any iags on the ag inode
947 * free list. if so, read the first one so that
948 * we can link the current iag onto the list at
951 if ((fwd
= imap
->im_agctl
[agno
].inofree
) >= 0) {
952 /* read the iag that currently is the head
955 if ((rc
= diIAGRead(imap
, fwd
, &
))) {
956 IREAD_UNLOCK(ipimap
);
957 AG_UNLOCK(imap
, agno
);
958 release_metapage(mp
);
961 aiagp
= (struct iag
*) amp
->data
;
963 /* make current head point back to the iag.
965 aiagp
->inofreeback
= cpu_to_le32(iagno
);
970 /* iag points forward to current head and iag
971 * becomes the new head of the list.
974 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
975 iagp
->inofreeback
= cpu_to_le32(-1);
976 imap
->im_agctl
[agno
].inofree
= iagno
;
978 IREAD_UNLOCK(ipimap
);
980 /* update the free inode summary map for the extent if
981 * freeing the inode means the extent will now have free
982 * inodes (i.e., the inode being freed is the first free
985 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
986 sword
= extno
>> L2EXTSPERSUM
;
987 bitno
= extno
& (EXTSPERSUM
- 1);
988 iagp
->inosmap
[sword
] &=
989 cpu_to_le32(~(HIGHORDER
>> bitno
));
992 /* update the bitmap.
994 iagp
->wmap
[extno
] = cpu_to_le32(bitmap
);
996 /* update the free inode counts at the iag, ag and
999 le32_add_cpu(&iagp
->nfreeinos
, 1);
1000 imap
->im_agctl
[agno
].numfree
+= 1;
1001 atomic_inc(&imap
->im_numfree
);
1003 /* release the AG inode map lock
1005 AG_UNLOCK(imap
, agno
);
1015 * inode extent has become free and above low water mark:
1016 * free the inode extent;
1020 * prepare to update iag list(s) (careful update step 1)
1022 amp
= bmp
= cmp
= dmp
= NULL
;
1025 /* check if the iag currently has no free extents. if so,
1026 * it will be placed on the head of the ag extent free list.
1028 if (iagp
->nfreeexts
== 0) {
1029 /* check if the ag extent free list has any iags.
1030 * if so, read the iag at the head of the list now.
1031 * this (head) iag will be updated later to reflect
1032 * the addition of the current iag at the head of
1035 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
1036 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1038 aiagp
= (struct iag
*) amp
->data
;
1041 /* iag has free extents. check if the addition of a free
1042 * extent will cause all extents to be free within this
1043 * iag. if so, the iag will be removed from the ag extent
1044 * free list and placed on the inode map's free iag list.
1046 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1047 /* in preparation for removing the iag from the
1048 * ag extent free list, read the iags preceding
1049 * and following the iag on the ag extent free
1052 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
1053 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1055 aiagp
= (struct iag
*) amp
->data
;
1058 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
1059 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
1061 biagp
= (struct iag
*) bmp
->data
;
1066 /* remove the iag from the ag inode free list if freeing
1067 * this extent cause the iag to have no free inodes.
1069 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1070 int inofreeback
= le32_to_cpu(iagp
->inofreeback
);
1071 int inofreefwd
= le32_to_cpu(iagp
->inofreefwd
);
1073 /* in preparation for removing the iag from the
1074 * ag inode free list, read the iags preceding
1075 * and following the iag on the ag inode free
1076 * list. before reading these iags, we must make
1077 * sure that we already don't have them in hand
1078 * from up above, since re-reading an iag (buffer)
1079 * we are currently holding would cause a deadlock.
1081 if (inofreefwd
>= 0) {
1083 if (inofreefwd
== fwd
)
1084 ciagp
= (struct iag
*) amp
->data
;
1085 else if (inofreefwd
== back
)
1086 ciagp
= (struct iag
*) bmp
->data
;
1089 diIAGRead(imap
, inofreefwd
, &cmp
)))
1091 ciagp
= (struct iag
*) cmp
->data
;
1093 assert(ciagp
!= NULL
);
1096 if (inofreeback
>= 0) {
1097 if (inofreeback
== fwd
)
1098 diagp
= (struct iag
*) amp
->data
;
1099 else if (inofreeback
== back
)
1100 diagp
= (struct iag
*) bmp
->data
;
1103 diIAGRead(imap
, inofreeback
, &dmp
)))
1105 diagp
= (struct iag
*) dmp
->data
;
1107 assert(diagp
!= NULL
);
1111 IREAD_UNLOCK(ipimap
);
1114 * invalidate any page of the inode extent freed from buffer cache;
1116 freepxd
= iagp
->inoext
[extno
];
1117 invalidate_pxd_metapages(ip
, freepxd
);
1120 * update iag list(s) (careful update step 2)
1122 /* add the iag to the ag extent free list if this is the
1123 * first free extent for the iag.
1125 if (iagp
->nfreeexts
== 0) {
1127 aiagp
->extfreeback
= cpu_to_le32(iagno
);
1130 cpu_to_le32(imap
->im_agctl
[agno
].extfree
);
1131 iagp
->extfreeback
= cpu_to_le32(-1);
1132 imap
->im_agctl
[agno
].extfree
= iagno
;
1134 /* remove the iag from the ag extent list if all extents
1135 * are now free and place it on the inode map iag free list.
1137 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1139 aiagp
->extfreeback
= iagp
->extfreeback
;
1142 biagp
->extfreefwd
= iagp
->extfreefwd
;
1144 imap
->im_agctl
[agno
].extfree
=
1145 le32_to_cpu(iagp
->extfreefwd
);
1147 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
1150 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1151 imap
->im_freeiag
= iagno
;
1152 IAGFREE_UNLOCK(imap
);
1156 /* remove the iag from the ag inode free list if freeing
1157 * this extent causes the iag to have no free inodes.
1159 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1160 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0)
1161 ciagp
->inofreeback
= iagp
->inofreeback
;
1163 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0)
1164 diagp
->inofreefwd
= iagp
->inofreefwd
;
1166 imap
->im_agctl
[agno
].inofree
=
1167 le32_to_cpu(iagp
->inofreefwd
);
1169 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
1172 /* update the inode extent address and working map
1173 * to reflect the free extent.
1174 * the permanent map should have been updated already
1175 * for the inode being freed.
1177 if (iagp
->pmap
[extno
] != 0) {
1178 jfs_error(ip
->i_sb
, "the pmap does not show inode free\n");
1180 iagp
->wmap
[extno
] = 0;
1181 PXDlength(&iagp
->inoext
[extno
], 0);
1182 PXDaddress(&iagp
->inoext
[extno
], 0);
1184 /* update the free extent and free inode summary maps
1185 * to reflect the freed extent.
1186 * the inode summary map is marked to indicate no inodes
1187 * available for the freed extent.
1189 sword
= extno
>> L2EXTSPERSUM
;
1190 bitno
= extno
& (EXTSPERSUM
- 1);
1191 mask
= HIGHORDER
>> bitno
;
1192 iagp
->inosmap
[sword
] |= cpu_to_le32(mask
);
1193 iagp
->extsmap
[sword
] &= cpu_to_le32(~mask
);
1195 /* update the number of free inodes and number of free extents
1198 le32_add_cpu(&iagp
->nfreeinos
, -(INOSPEREXT
- 1));
1199 le32_add_cpu(&iagp
->nfreeexts
, 1);
1201 /* update the number of free inodes and backed inodes
1202 * at the ag and inode map level.
1204 imap
->im_agctl
[agno
].numfree
-= (INOSPEREXT
- 1);
1205 imap
->im_agctl
[agno
].numinos
-= INOSPEREXT
;
1206 atomic_sub(INOSPEREXT
- 1, &imap
->im_numfree
);
1207 atomic_sub(INOSPEREXT
, &imap
->im_numinos
);
1210 write_metapage(amp
);
1212 write_metapage(bmp
);
1214 write_metapage(cmp
);
1216 write_metapage(dmp
);
1219 * start transaction to update block allocation map
1220 * for the inode extent freed;
1222 * N.B. AG_LOCK is released and iag will be released below, and
1223 * other thread may allocate inode from/reusing the ixad freed
1224 * BUT with new/different backing inode extent from the extent
1225 * to be freed by the transaction;
1227 tid
= txBegin(ipimap
->i_sb
, COMMIT_FORCE
);
1228 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
1230 /* acquire tlock of the iag page of the freed ixad
1231 * to force the page NOHOMEOK (even though no data is
1232 * logged from the iag page) until NOREDOPAGE|FREEXTENT log
1233 * for the free of the extent is committed;
1234 * write FREEXTENT|NOREDOPAGE log record
1235 * N.B. linelock is overlaid as freed extent descriptor;
1237 tlck
= txLock(tid
, ipimap
, mp
, tlckINODE
| tlckFREE
);
1238 pxdlock
= (struct pxd_lock
*) & tlck
->lock
;
1239 pxdlock
->flag
= mlckFREEPXD
;
1240 pxdlock
->pxd
= freepxd
;
1248 * logredo needs the IAG number and IAG extent index in order
1249 * to ensure that the IMap is consistent. The least disruptive
1250 * way to pass these values through to the transaction manager
1251 * is in the iplist array.
1253 * It's not pretty, but it works.
1255 iplist
[1] = (struct inode
*) (size_t)iagno
;
1256 iplist
[2] = (struct inode
*) (size_t)extno
;
1258 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
1261 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
1263 /* unlock the AG inode map information */
1264 AG_UNLOCK(imap
, agno
);
1269 IREAD_UNLOCK(ipimap
);
1272 release_metapage(amp
);
1274 release_metapage(bmp
);
1276 release_metapage(cmp
);
1278 release_metapage(dmp
);
1280 AG_UNLOCK(imap
, agno
);
1282 release_metapage(mp
);
1288 * There are several places in the diAlloc* routines where we initialize
1292 diInitInode(struct inode
*ip
, int iagno
, int ino
, int extno
, struct iag
* iagp
)
1294 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
1296 ip
->i_ino
= (iagno
<< L2INOSPERIAG
) + ino
;
1297 jfs_ip
->ixpxd
= iagp
->inoext
[extno
];
1298 jfs_ip
->agstart
= le64_to_cpu(iagp
->agstart
);
1299 jfs_ip
->active_ag
= -1;
1304 * NAME: diAlloc(pip,dir,ip)
1306 * FUNCTION: allocate a disk inode from the inode working map
1307 * for a fileset or aggregate.
1310 * pip - pointer to incore inode for the parent inode.
1311 * dir - 'true' if the new disk inode is for a directory.
1312 * ip - pointer to a new inode
1316 * -ENOSPC - insufficient disk resources.
1319 int diAlloc(struct inode
*pip
, bool dir
, struct inode
*ip
)
1321 int rc
, ino
, iagno
, addext
, extno
, bitno
, sword
;
1322 int nwords
, rem
, i
, agno
;
1323 u32 mask
, inosmap
, extsmap
;
1324 struct inode
*ipimap
;
1325 struct metapage
*mp
;
1328 struct inomap
*imap
;
1330 /* get the pointers to the inode map inode and the
1331 * corresponding imap control structure.
1333 ipimap
= JFS_SBI(pip
->i_sb
)->ipimap
;
1334 imap
= JFS_IP(ipimap
)->i_imap
;
1335 JFS_IP(ip
)->ipimap
= ipimap
;
1336 JFS_IP(ip
)->fileset
= FILESYSTEM_I
;
1338 /* for a directory, the allocation policy is to start
1339 * at the ag level using the preferred ag.
1342 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1343 AG_LOCK(imap
, agno
);
1347 /* for files, the policy starts off by trying to allocate from
1348 * the same iag containing the parent disk inode:
1349 * try to allocate the new disk inode close to the parent disk
1350 * inode, using parent disk inode number + 1 as the allocation
1351 * hint. (we use a left-to-right policy to attempt to avoid
1352 * moving backward on the disk.) compute the hint within the
1353 * file system and the iag.
1356 /* get the ag number of this iag */
1357 agno
= BLKTOAG(JFS_IP(pip
)->agstart
, JFS_SBI(pip
->i_sb
));
1359 if (atomic_read(&JFS_SBI(pip
->i_sb
)->bmap
->db_active
[agno
])) {
1361 * There is an open file actively growing. We want to
1362 * allocate new inodes from a different ag to avoid
1363 * fragmentation problems.
1365 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1366 AG_LOCK(imap
, agno
);
1370 inum
= pip
->i_ino
+ 1;
1371 ino
= inum
& (INOSPERIAG
- 1);
1373 /* back off the hint if it is outside of the iag */
1377 /* lock the AG inode map information */
1378 AG_LOCK(imap
, agno
);
1380 /* Get read lock on imap inode */
1381 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
1383 /* get the iag number and read the iag */
1384 iagno
= INOTOIAG(inum
);
1385 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1386 IREAD_UNLOCK(ipimap
);
1387 AG_UNLOCK(imap
, agno
);
1390 iagp
= (struct iag
*) mp
->data
;
1392 /* determine if new inode extent is allowed to be added to the iag.
1393 * new inode extent can be added to the iag if the ag
1394 * has less than 32 free disk inodes and the iag has free extents.
1396 addext
= (imap
->im_agctl
[agno
].numfree
< 32 && iagp
->nfreeexts
);
1399 * try to allocate from the IAG
1401 /* check if the inode may be allocated from the iag
1402 * (i.e. the inode has free inodes or new extent can be added).
1404 if (iagp
->nfreeinos
|| addext
) {
1405 /* determine the extent number of the hint.
1407 extno
= ino
>> L2INOSPEREXT
;
1409 /* check if the extent containing the hint has backed
1410 * inodes. if so, try to allocate within this extent.
1412 if (addressPXD(&iagp
->inoext
[extno
])) {
1413 bitno
= ino
& (INOSPEREXT
- 1);
1415 diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1418 ino
= (extno
<< L2INOSPEREXT
) + bitno
;
1420 /* a free inode (bit) was found within this
1421 * extent, so allocate it.
1423 rc
= diAllocBit(imap
, iagp
, ino
);
1424 IREAD_UNLOCK(ipimap
);
1428 /* set the results of the allocation
1429 * and write the iag.
1431 diInitInode(ip
, iagno
, ino
, extno
,
1433 mark_metapage_dirty(mp
);
1435 release_metapage(mp
);
1437 /* free the AG lock and return.
1439 AG_UNLOCK(imap
, agno
);
1446 EXTSPERIAG
- 1) ? 0 : extno
+ 1;
1450 * no free inodes within the extent containing the hint.
1452 * try to allocate from the backed extents following
1453 * hint or, if appropriate (i.e. addext is true), allocate
1454 * an extent of free inodes at or following the extent
1455 * containing the hint.
1457 * the free inode and free extent summary maps are used
1458 * here, so determine the starting summary map position
1459 * and the number of words we'll have to examine. again,
1460 * the approach is to allocate following the hint, so we
1461 * might have to initially ignore prior bits of the summary
1462 * map that represent extents prior to the extent containing
1463 * the hint and later revisit these bits.
1465 bitno
= extno
& (EXTSPERSUM
- 1);
1466 nwords
= (bitno
== 0) ? SMAPSZ
: SMAPSZ
+ 1;
1467 sword
= extno
>> L2EXTSPERSUM
;
1469 /* mask any prior bits for the starting words of the
1472 mask
= (bitno
== 0) ? 0 : (ONES
<< (EXTSPERSUM
- bitno
));
1473 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]) | mask
;
1474 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]) | mask
;
1476 /* scan the free inode and free extent summary maps for
1479 for (i
= 0; i
< nwords
; i
++) {
1480 /* check if this word of the free inode summary
1481 * map describes an extent with free inodes.
1484 /* an extent with free inodes has been
1485 * found. determine the extent number
1486 * and the inode number within the extent.
1488 rem
= diFindFree(inosmap
, 0);
1489 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1490 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1492 if (rem
>= INOSPEREXT
) {
1493 IREAD_UNLOCK(ipimap
);
1494 release_metapage(mp
);
1495 AG_UNLOCK(imap
, agno
);
1497 "can't find free bit in wmap\n");
1501 /* determine the inode number within the
1502 * iag and allocate the inode from the
1505 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1506 rc
= diAllocBit(imap
, iagp
, ino
);
1507 IREAD_UNLOCK(ipimap
);
1511 /* set the results of the allocation
1512 * and write the iag.
1514 diInitInode(ip
, iagno
, ino
, extno
,
1516 mark_metapage_dirty(mp
);
1518 release_metapage(mp
);
1520 /* free the AG lock and return.
1522 AG_UNLOCK(imap
, agno
);
1527 /* check if we may allocate an extent of free
1528 * inodes and whether this word of the free
1529 * extents summary map describes a free extent.
1531 if (addext
&& ~extsmap
) {
1532 /* a free extent has been found. determine
1533 * the extent number.
1535 rem
= diFindFree(extsmap
, 0);
1536 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1538 /* allocate an extent of free inodes.
1540 if ((rc
= diNewExt(imap
, iagp
, extno
))) {
1541 /* if there is no disk space for a
1542 * new extent, try to allocate the
1543 * disk inode from somewhere else.
1550 /* set the results of the allocation
1551 * and write the iag.
1553 diInitInode(ip
, iagno
,
1554 extno
<< L2INOSPEREXT
,
1556 mark_metapage_dirty(mp
);
1558 release_metapage(mp
);
1559 /* free the imap inode & the AG lock & return.
1561 IREAD_UNLOCK(ipimap
);
1562 AG_UNLOCK(imap
, agno
);
1566 /* move on to the next set of summary map words.
1568 sword
= (sword
== SMAPSZ
- 1) ? 0 : sword
+ 1;
1569 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]);
1570 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]);
1573 /* unlock imap inode */
1574 IREAD_UNLOCK(ipimap
);
1576 /* nothing doing in this iag, so release it. */
1577 release_metapage(mp
);
1581 * try to allocate anywhere within the same AG as the parent inode.
1583 rc
= diAllocAG(imap
, agno
, dir
, ip
);
1585 AG_UNLOCK(imap
, agno
);
1591 * try to allocate in any AG.
1593 return (diAllocAny(imap
, agno
, dir
, ip
));
1598 * NAME: diAllocAG(imap,agno,dir,ip)
1600 * FUNCTION: allocate a disk inode from the allocation group.
1602 * this routine first determines if a new extent of free
1603 * inodes should be added for the allocation group, with
1604 * the current request satisfied from this extent. if this
1605 * is the case, an attempt will be made to do just that. if
1606 * this attempt fails or it has been determined that a new
1607 * extent should not be added, an attempt is made to satisfy
1608 * the request by allocating an existing (backed) free inode
1609 * from the allocation group.
1611 * PRE CONDITION: Already have the AG lock for this AG.
1614 * imap - pointer to inode map control structure.
1615 * agno - allocation group to allocate from.
1616 * dir - 'true' if the new disk inode is for a directory.
1617 * ip - pointer to the new inode to be filled in on successful return
1618 * with the disk inode number allocated, its extent address
1619 * and the start of the ag.
1623 * -ENOSPC - insufficient disk resources.
1627 diAllocAG(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1629 int rc
, addext
, numfree
, numinos
;
1631 /* get the number of free and the number of backed disk
1632 * inodes currently within the ag.
1634 numfree
= imap
->im_agctl
[agno
].numfree
;
1635 numinos
= imap
->im_agctl
[agno
].numinos
;
1637 if (numfree
> numinos
) {
1638 jfs_error(ip
->i_sb
, "numfree > numinos\n");
1642 /* determine if we should allocate a new extent of free inodes
1643 * within the ag: for directory inodes, add a new extent
1644 * if there are a small number of free inodes or number of free
1645 * inodes is a small percentage of the number of backed inodes.
1648 addext
= (numfree
< 64 ||
1650 && ((numfree
* 100) / numinos
) <= 20));
1652 addext
= (numfree
== 0);
1655 * try to allocate a new extent of free inodes.
1658 /* if free space is not available for this new extent, try
1659 * below to allocate a free and existing (already backed)
1660 * inode from the ag.
1662 if ((rc
= diAllocExt(imap
, agno
, ip
)) != -ENOSPC
)
1667 * try to allocate an existing free inode from the ag.
1669 return (diAllocIno(imap
, agno
, ip
));
1674 * NAME: diAllocAny(imap,agno,dir,iap)
1676 * FUNCTION: allocate a disk inode from any other allocation group.
1678 * this routine is called when an allocation attempt within
1679 * the primary allocation group has failed. if attempts to
1680 * allocate an inode from any allocation group other than the
1681 * specified primary group.
1684 * imap - pointer to inode map control structure.
1685 * agno - primary allocation group (to avoid).
1686 * dir - 'true' if the new disk inode is for a directory.
1687 * ip - pointer to a new inode to be filled in on successful return
1688 * with the disk inode number allocated, its extent address
1689 * and the start of the ag.
1693 * -ENOSPC - insufficient disk resources.
1697 diAllocAny(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1700 int maxag
= JFS_SBI(imap
->im_ipimap
->i_sb
)->bmap
->db_maxag
;
1703 /* try to allocate from the ags following agno up to
1704 * the maximum ag number.
1706 for (ag
= agno
+ 1; ag
<= maxag
; ag
++) {
1709 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1711 AG_UNLOCK(imap
, ag
);
1717 /* try to allocate from the ags in front of agno.
1719 for (ag
= 0; ag
< agno
; ag
++) {
1722 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1724 AG_UNLOCK(imap
, ag
);
1730 /* no free disk inodes.
1737 * NAME: diAllocIno(imap,agno,ip)
1739 * FUNCTION: allocate a disk inode from the allocation group's free
1740 * inode list, returning an error if this free list is
1741 * empty (i.e. no iags on the list).
1743 * allocation occurs from the first iag on the list using
1744 * the iag's free inode summary map to find the leftmost
1745 * free inode in the iag.
1747 * PRE CONDITION: Already have AG lock for this AG.
1750 * imap - pointer to inode map control structure.
1751 * agno - allocation group.
1752 * ip - pointer to new inode to be filled in on successful return
1753 * with the disk inode number allocated, its extent address
1754 * and the start of the ag.
1758 * -ENOSPC - insufficient disk resources.
1761 static int diAllocIno(struct inomap
* imap
, int agno
, struct inode
*ip
)
1763 int iagno
, ino
, rc
, rem
, extno
, sword
;
1764 struct metapage
*mp
;
1767 /* check if there are iags on the ag's free inode list.
1769 if ((iagno
= imap
->im_agctl
[agno
].inofree
) < 0)
1772 /* obtain read lock on imap inode */
1773 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1775 /* read the iag at the head of the list.
1777 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1778 IREAD_UNLOCK(imap
->im_ipimap
);
1781 iagp
= (struct iag
*) mp
->data
;
1783 /* better be free inodes in this iag if it is on the
1786 if (!iagp
->nfreeinos
) {
1787 IREAD_UNLOCK(imap
->im_ipimap
);
1788 release_metapage(mp
);
1789 jfs_error(ip
->i_sb
, "nfreeinos = 0, but iag on freelist\n");
1793 /* scan the free inode summary map to find an extent
1796 for (sword
= 0;; sword
++) {
1797 if (sword
>= SMAPSZ
) {
1798 IREAD_UNLOCK(imap
->im_ipimap
);
1799 release_metapage(mp
);
1801 "free inode not found in summary map\n");
1805 if (~iagp
->inosmap
[sword
])
1809 /* found a extent with free inodes. determine
1810 * the extent number.
1812 rem
= diFindFree(le32_to_cpu(iagp
->inosmap
[sword
]), 0);
1813 if (rem
>= EXTSPERSUM
) {
1814 IREAD_UNLOCK(imap
->im_ipimap
);
1815 release_metapage(mp
);
1816 jfs_error(ip
->i_sb
, "no free extent found\n");
1819 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1821 /* find the first free inode in the extent.
1823 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]), 0);
1824 if (rem
>= INOSPEREXT
) {
1825 IREAD_UNLOCK(imap
->im_ipimap
);
1826 release_metapage(mp
);
1827 jfs_error(ip
->i_sb
, "free inode not found\n");
1831 /* compute the inode number within the iag.
1833 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1835 /* allocate the inode.
1837 rc
= diAllocBit(imap
, iagp
, ino
);
1838 IREAD_UNLOCK(imap
->im_ipimap
);
1840 release_metapage(mp
);
1844 /* set the results of the allocation and write the iag.
1846 diInitInode(ip
, iagno
, ino
, extno
, iagp
);
1854 * NAME: diAllocExt(imap,agno,ip)
1856 * FUNCTION: add a new extent of free inodes to an iag, allocating
1857 * an inode from this extent to satisfy the current allocation
1860 * this routine first tries to find an existing iag with free
1861 * extents through the ag free extent list. if list is not
1862 * empty, the head of the list will be selected as the home
1863 * of the new extent of free inodes. otherwise (the list is
1864 * empty), a new iag will be allocated for the ag to contain
1867 * once an iag has been selected, the free extent summary map
1868 * is used to locate a free extent within the iag and diNewExt()
1869 * is called to initialize the extent, with initialization
1870 * including the allocation of the first inode of the extent
1871 * for the purpose of satisfying this request.
1874 * imap - pointer to inode map control structure.
1875 * agno - allocation group number.
1876 * ip - pointer to new inode to be filled in on successful return
1877 * with the disk inode number allocated, its extent address
1878 * and the start of the ag.
1882 * -ENOSPC - insufficient disk resources.
1885 static int diAllocExt(struct inomap
* imap
, int agno
, struct inode
*ip
)
1887 int rem
, iagno
, sword
, extno
, rc
;
1888 struct metapage
*mp
;
1891 /* check if the ag has any iags with free extents. if not,
1892 * allocate a new iag for the ag.
1894 if ((iagno
= imap
->im_agctl
[agno
].extfree
) < 0) {
1895 /* If successful, diNewIAG will obtain the read lock on the
1898 if ((rc
= diNewIAG(imap
, &iagno
, agno
, &mp
))) {
1901 iagp
= (struct iag
*) mp
->data
;
1903 /* set the ag number if this a brand new iag
1906 cpu_to_le64(AGTOBLK(agno
, imap
->im_ipimap
));
1910 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1911 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1912 IREAD_UNLOCK(imap
->im_ipimap
);
1913 jfs_error(ip
->i_sb
, "error reading iag\n");
1916 iagp
= (struct iag
*) mp
->data
;
1919 /* using the free extent summary map, find a free extent.
1921 for (sword
= 0;; sword
++) {
1922 if (sword
>= SMAPSZ
) {
1923 release_metapage(mp
);
1924 IREAD_UNLOCK(imap
->im_ipimap
);
1925 jfs_error(ip
->i_sb
, "free ext summary map not found\n");
1928 if (~iagp
->extsmap
[sword
])
1932 /* determine the extent number of the free extent.
1934 rem
= diFindFree(le32_to_cpu(iagp
->extsmap
[sword
]), 0);
1935 if (rem
>= EXTSPERSUM
) {
1936 release_metapage(mp
);
1937 IREAD_UNLOCK(imap
->im_ipimap
);
1938 jfs_error(ip
->i_sb
, "free extent not found\n");
1941 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1943 /* initialize the new extent.
1945 rc
= diNewExt(imap
, iagp
, extno
);
1946 IREAD_UNLOCK(imap
->im_ipimap
);
1948 /* something bad happened. if a new iag was allocated,
1949 * place it back on the inode map's iag free list, and
1950 * clear the ag number information.
1952 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
1954 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1955 imap
->im_freeiag
= iagno
;
1956 IAGFREE_UNLOCK(imap
);
1962 /* set the results of the allocation and write the iag.
1964 diInitInode(ip
, iagno
, extno
<< L2INOSPEREXT
, extno
, iagp
);
1973 * NAME: diAllocBit(imap,iagp,ino)
1975 * FUNCTION: allocate a backed inode from an iag.
1977 * this routine performs the mechanics of allocating a
1978 * specified inode from a backed extent.
1980 * if the inode to be allocated represents the last free
1981 * inode within the iag, the iag will be removed from the
1982 * ag free inode list.
1984 * a careful update approach is used to provide consistency
1985 * in the face of updates to multiple buffers. under this
1986 * approach, all required buffers are obtained before making
1987 * any updates and are held all are updates are complete.
1989 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
1990 * this AG. Must have read lock on imap inode.
1993 * imap - pointer to inode map control structure.
1994 * iagp - pointer to iag.
1995 * ino - inode number to be allocated within the iag.
1999 * -ENOSPC - insufficient disk resources.
2002 static int diAllocBit(struct inomap
* imap
, struct iag
* iagp
, int ino
)
2004 int extno
, bitno
, agno
, sword
, rc
;
2005 struct metapage
*amp
= NULL
, *bmp
= NULL
;
2006 struct iag
*aiagp
= NULL
, *biagp
= NULL
;
2009 /* check if this is the last free inode within the iag.
2010 * if so, it will have to be removed from the ag free
2011 * inode list, so get the iags preceding and following
2014 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2015 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0) {
2017 diIAGRead(imap
, le32_to_cpu(iagp
->inofreefwd
),
2020 aiagp
= (struct iag
*) amp
->data
;
2023 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0) {
2026 le32_to_cpu(iagp
->inofreeback
),
2029 release_metapage(amp
);
2032 biagp
= (struct iag
*) bmp
->data
;
2036 /* get the ag number, extent number, inode number within
2039 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), JFS_SBI(imap
->im_ipimap
->i_sb
));
2040 extno
= ino
>> L2INOSPEREXT
;
2041 bitno
= ino
& (INOSPEREXT
- 1);
2043 /* compute the mask for setting the map.
2045 mask
= HIGHORDER
>> bitno
;
2047 /* the inode should be free and backed.
2049 if (((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) ||
2050 ((le32_to_cpu(iagp
->wmap
[extno
]) & mask
) != 0) ||
2051 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
2053 release_metapage(amp
);
2055 release_metapage(bmp
);
2057 jfs_error(imap
->im_ipimap
->i_sb
, "iag inconsistent\n");
2061 /* mark the inode as allocated in the working map.
2063 iagp
->wmap
[extno
] |= cpu_to_le32(mask
);
2065 /* check if all inodes within the extent are now
2066 * allocated. if so, update the free inode summary
2067 * map to reflect this.
2069 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
2070 sword
= extno
>> L2EXTSPERSUM
;
2071 bitno
= extno
& (EXTSPERSUM
- 1);
2072 iagp
->inosmap
[sword
] |= cpu_to_le32(HIGHORDER
>> bitno
);
2075 /* if this was the last free inode in the iag, remove the
2076 * iag from the ag free inode list.
2078 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2080 aiagp
->inofreeback
= iagp
->inofreeback
;
2081 write_metapage(amp
);
2085 biagp
->inofreefwd
= iagp
->inofreefwd
;
2086 write_metapage(bmp
);
2088 imap
->im_agctl
[agno
].inofree
=
2089 le32_to_cpu(iagp
->inofreefwd
);
2091 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2094 /* update the free inode count at the iag, ag, inode
2097 le32_add_cpu(&iagp
->nfreeinos
, -1);
2098 imap
->im_agctl
[agno
].numfree
-= 1;
2099 atomic_dec(&imap
->im_numfree
);
2106 * NAME: diNewExt(imap,iagp,extno)
2108 * FUNCTION: initialize a new extent of inodes for an iag, allocating
2109 * the first inode of the extent for use for the current
2110 * allocation request.
2112 * disk resources are allocated for the new extent of inodes
2113 * and the inodes themselves are initialized to reflect their
2114 * existence within the extent (i.e. their inode numbers and
2115 * inode extent addresses are set) and their initial state
2116 * (mode and link count are set to zero).
2118 * if the iag is new, it is not yet on an ag extent free list
2119 * but will now be placed on this list.
2121 * if the allocation of the new extent causes the iag to
2122 * have no free extent, the iag will be removed from the
2123 * ag extent free list.
2125 * if the iag has no free backed inodes, it will be placed
2126 * on the ag free inode list, since the addition of the new
2127 * extent will now cause it to have free inodes.
2129 * a careful update approach is used to provide consistency
2130 * (i.e. list consistency) in the face of updates to multiple
2131 * buffers. under this approach, all required buffers are
2132 * obtained before making any updates and are held until all
2133 * updates are complete.
2135 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
2136 * this AG. Must have read lock on imap inode.
2139 * imap - pointer to inode map control structure.
2140 * iagp - pointer to iag.
2141 * extno - extent number.
2145 * -ENOSPC - insufficient disk resources.
2148 static int diNewExt(struct inomap
* imap
, struct iag
* iagp
, int extno
)
2150 int agno
, iagno
, fwd
, back
, freei
= 0, sword
, rc
;
2151 struct iag
*aiagp
= NULL
, *biagp
= NULL
, *ciagp
= NULL
;
2152 struct metapage
*amp
, *bmp
, *cmp
, *dmp
;
2153 struct inode
*ipimap
;
2159 struct jfs_sb_info
*sbi
;
2161 /* better have free extents.
2163 if (!iagp
->nfreeexts
) {
2164 jfs_error(imap
->im_ipimap
->i_sb
, "no free extents\n");
2168 /* get the inode map inode.
2170 ipimap
= imap
->im_ipimap
;
2171 sbi
= JFS_SBI(ipimap
->i_sb
);
2173 amp
= bmp
= cmp
= NULL
;
2175 /* get the ag and iag numbers for this iag.
2177 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), sbi
);
2178 iagno
= le32_to_cpu(iagp
->iagnum
);
2180 /* check if this is the last free extent within the
2181 * iag. if so, the iag must be removed from the ag
2182 * free extent list, so get the iags preceding and
2183 * following the iag on this list.
2185 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2186 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
2187 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2189 aiagp
= (struct iag
*) amp
->data
;
2192 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
2193 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
2195 biagp
= (struct iag
*) bmp
->data
;
2198 /* the iag has free extents. if all extents are free
2199 * (as is the case for a newly allocated iag), the iag
2200 * must be added to the ag free extent list, so get
2201 * the iag at the head of the list in preparation for
2202 * adding this iag to this list.
2205 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2206 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
2207 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2209 aiagp
= (struct iag
*) amp
->data
;
2214 /* check if the iag has no free inodes. if so, the iag
2215 * will have to be added to the ag free inode list, so get
2216 * the iag at the head of the list in preparation for
2217 * adding this iag to this list. in doing this, we must
2218 * check if we already have the iag at the head of
2221 if (iagp
->nfreeinos
== 0) {
2222 freei
= imap
->im_agctl
[agno
].inofree
;
2227 } else if (freei
== back
) {
2230 if ((rc
= diIAGRead(imap
, freei
, &cmp
)))
2232 ciagp
= (struct iag
*) cmp
->data
;
2234 if (ciagp
== NULL
) {
2235 jfs_error(imap
->im_ipimap
->i_sb
,
2243 /* allocate disk space for the inode extent.
2245 if ((extno
== 0) || (addressPXD(&iagp
->inoext
[extno
- 1]) == 0))
2246 hint
= ((s64
) agno
<< sbi
->bmap
->db_agl2size
) - 1;
2248 hint
= addressPXD(&iagp
->inoext
[extno
- 1]) +
2249 lengthPXD(&iagp
->inoext
[extno
- 1]) - 1;
2251 if ((rc
= dbAlloc(ipimap
, hint
, (s64
) imap
->im_nbperiext
, &blkno
)))
2254 /* compute the inode number of the first inode within the
2257 ino
= (iagno
<< L2INOSPERIAG
) + (extno
<< L2INOSPEREXT
);
2259 /* initialize the inodes within the newly allocated extent a
2262 for (i
= 0; i
< imap
->im_nbperiext
; i
+= sbi
->nbperpage
) {
2263 /* get a buffer for this page of disk inodes.
2265 dmp
= get_metapage(ipimap
, blkno
+ i
, PSIZE
, 1);
2270 dp
= (struct dinode
*) dmp
->data
;
2272 /* initialize the inode number, mode, link count and
2273 * inode extent address.
2275 for (j
= 0; j
< INOSPERPAGE
; j
++, dp
++, ino
++) {
2276 dp
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
2277 dp
->di_number
= cpu_to_le32(ino
);
2278 dp
->di_fileset
= cpu_to_le32(FILESYSTEM_I
);
2281 PXDaddress(&(dp
->di_ixpxd
), blkno
);
2282 PXDlength(&(dp
->di_ixpxd
), imap
->im_nbperiext
);
2284 write_metapage(dmp
);
2287 /* if this is the last free extent within the iag, remove the
2288 * iag from the ag free extent list.
2290 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2292 aiagp
->extfreeback
= iagp
->extfreeback
;
2295 biagp
->extfreefwd
= iagp
->extfreefwd
;
2297 imap
->im_agctl
[agno
].extfree
=
2298 le32_to_cpu(iagp
->extfreefwd
);
2300 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2302 /* if the iag has all free extents (newly allocated iag),
2303 * add the iag to the ag free extent list.
2305 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2307 aiagp
->extfreeback
= cpu_to_le32(iagno
);
2309 iagp
->extfreefwd
= cpu_to_le32(fwd
);
2310 iagp
->extfreeback
= cpu_to_le32(-1);
2311 imap
->im_agctl
[agno
].extfree
= iagno
;
2315 /* if the iag has no free inodes, add the iag to the
2316 * ag free inode list.
2318 if (iagp
->nfreeinos
== 0) {
2320 ciagp
->inofreeback
= cpu_to_le32(iagno
);
2323 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
2324 iagp
->inofreeback
= cpu_to_le32(-1);
2325 imap
->im_agctl
[agno
].inofree
= iagno
;
2328 /* initialize the extent descriptor of the extent. */
2329 PXDlength(&iagp
->inoext
[extno
], imap
->im_nbperiext
);
2330 PXDaddress(&iagp
->inoext
[extno
], blkno
);
2332 /* initialize the working and persistent map of the extent.
2333 * the working map will be initialized such that
2334 * it indicates the first inode of the extent is allocated.
2336 iagp
->wmap
[extno
] = cpu_to_le32(HIGHORDER
);
2337 iagp
->pmap
[extno
] = 0;
2339 /* update the free inode and free extent summary maps
2340 * for the extent to indicate the extent has free inodes
2341 * and no longer represents a free extent.
2343 sword
= extno
>> L2EXTSPERSUM
;
2344 mask
= HIGHORDER
>> (extno
& (EXTSPERSUM
- 1));
2345 iagp
->extsmap
[sword
] |= cpu_to_le32(mask
);
2346 iagp
->inosmap
[sword
] &= cpu_to_le32(~mask
);
2348 /* update the free inode and free extent counts for the
2351 le32_add_cpu(&iagp
->nfreeinos
, (INOSPEREXT
- 1));
2352 le32_add_cpu(&iagp
->nfreeexts
, -1);
2354 /* update the free and backed inode counts for the ag.
2356 imap
->im_agctl
[agno
].numfree
+= (INOSPEREXT
- 1);
2357 imap
->im_agctl
[agno
].numinos
+= INOSPEREXT
;
2359 /* update the free and backed inode counts for the inode map.
2361 atomic_add(INOSPEREXT
- 1, &imap
->im_numfree
);
2362 atomic_add(INOSPEREXT
, &imap
->im_numinos
);
2367 write_metapage(amp
);
2369 write_metapage(bmp
);
2371 write_metapage(cmp
);
2377 /* release the iags.
2380 release_metapage(amp
);
2382 release_metapage(bmp
);
2384 release_metapage(cmp
);
2391 * NAME: diNewIAG(imap,iagnop,agno)
2393 * FUNCTION: allocate a new iag for an allocation group.
2395 * first tries to allocate the iag from the inode map
2397 * if the list has free iags, the head of the list is removed
2398 * and returned to satisfy the request.
2399 * if the inode map's iag free list is empty, the inode map
2400 * is extended to hold a new iag. this new iag is initialized
2401 * and returned to satisfy the request.
2404 * imap - pointer to inode map control structure.
2405 * iagnop - pointer to an iag number set with the number of the
2406 * newly allocated iag upon successful return.
2407 * agno - allocation group number.
2408 * bpp - Buffer pointer to be filled in with new IAG's buffer
2412 * -ENOSPC - insufficient disk resources.
2416 * AG lock held on entry/exit;
2417 * write lock on the map is held inside;
2418 * read lock on the map is held on successful completion;
2420 * note: new iag transaction:
2421 * . synchronously write iag;
2422 * . write log of xtree and inode of imap;
2424 * . synchronous write of xtree (right to left, bottom to top);
2425 * . at start of logredo(): init in-memory imap with one additional iag page;
2426 * . at end of logredo(): re-read imap inode to determine
2430 diNewIAG(struct inomap
* imap
, int *iagnop
, int agno
, struct metapage
** mpp
)
2434 struct inode
*ipimap
;
2435 struct super_block
*sb
;
2436 struct jfs_sb_info
*sbi
;
2437 struct metapage
*mp
;
2442 struct inode
*iplist
[1];
2444 /* pick up pointers to the inode map and mount inodes */
2445 ipimap
= imap
->im_ipimap
;
2449 /* acquire the free iag lock */
2452 /* if there are any iags on the inode map free iag list,
2453 * allocate the iag from the head of the list.
2455 if (imap
->im_freeiag
>= 0) {
2456 /* pick up the iag number at the head of the list */
2457 iagno
= imap
->im_freeiag
;
2459 /* determine the logical block number of the iag */
2460 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2462 /* no free iags. the inode map will have to be extented
2463 * to include a new iag.
2466 /* acquire inode map lock */
2467 IWRITE_LOCK(ipimap
, RDWRLOCK_IMAP
);
2469 if (ipimap
->i_size
>> L2PSIZE
!= imap
->im_nextiag
+ 1) {
2470 IWRITE_UNLOCK(ipimap
);
2471 IAGFREE_UNLOCK(imap
);
2472 jfs_error(imap
->im_ipimap
->i_sb
,
2473 "ipimap->i_size is wrong\n");
2478 /* get the next available iag number */
2479 iagno
= imap
->im_nextiag
;
2481 /* make sure that we have not exceeded the maximum inode
2484 if (iagno
> (MAXIAGS
- 1)) {
2485 /* release the inode map lock */
2486 IWRITE_UNLOCK(ipimap
);
2493 * synchronously append new iag page.
2495 /* determine the logical address of iag page to append */
2496 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2498 /* Allocate extent for new iag page */
2499 xlen
= sbi
->nbperpage
;
2500 if ((rc
= dbAlloc(ipimap
, 0, (s64
) xlen
, &xaddr
))) {
2501 /* release the inode map lock */
2502 IWRITE_UNLOCK(ipimap
);
2508 * start transaction of update of the inode map
2509 * addressing structure pointing to the new iag page;
2511 tid
= txBegin(sb
, COMMIT_FORCE
);
2512 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
2514 /* update the inode map addressing structure to point to it */
2516 xtInsert(tid
, ipimap
, 0, blkno
, xlen
, &xaddr
, 0))) {
2518 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2519 /* Free the blocks allocated for the iag since it was
2520 * not successfully added to the inode map
2522 dbFree(ipimap
, xaddr
, (s64
) xlen
);
2524 /* release the inode map lock */
2525 IWRITE_UNLOCK(ipimap
);
2530 /* update the inode map's inode to reflect the extension */
2531 ipimap
->i_size
+= PSIZE
;
2532 inode_add_bytes(ipimap
, PSIZE
);
2534 /* assign a buffer for the page */
2535 mp
= get_metapage(ipimap
, blkno
, PSIZE
, 0);
2538 * This is very unlikely since we just created the
2539 * extent, but let's try to handle it correctly
2541 xtTruncate(tid
, ipimap
, ipimap
->i_size
- PSIZE
,
2546 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2548 /* release the inode map lock */
2549 IWRITE_UNLOCK(ipimap
);
2554 iagp
= (struct iag
*) mp
->data
;
2557 memset(iagp
, 0, sizeof(struct iag
));
2558 iagp
->iagnum
= cpu_to_le32(iagno
);
2559 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2560 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2561 iagp
->iagfree
= cpu_to_le32(-1);
2562 iagp
->nfreeinos
= 0;
2563 iagp
->nfreeexts
= cpu_to_le32(EXTSPERIAG
);
2565 /* initialize the free inode summary map (free extent
2566 * summary map initialization handled by bzero).
2568 for (i
= 0; i
< SMAPSZ
; i
++)
2569 iagp
->inosmap
[i
] = cpu_to_le32(ONES
);
2572 * Write and sync the metapage
2577 * txCommit(COMMIT_FORCE) will synchronously write address
2578 * index pages and inode after commit in careful update order
2579 * of address index pages (right to left, bottom up);
2582 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
2585 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2587 duplicateIXtree(sb
, blkno
, xlen
, &xaddr
);
2589 /* update the next available iag number */
2590 imap
->im_nextiag
+= 1;
2592 /* Add the iag to the iag free list so we don't lose the iag
2593 * if a failure happens now.
2595 imap
->im_freeiag
= iagno
;
2597 /* Until we have logredo working, we want the imap inode &
2598 * control page to be up to date.
2602 /* release the inode map lock */
2603 IWRITE_UNLOCK(ipimap
);
2606 /* obtain read lock on map */
2607 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2610 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
2611 IREAD_UNLOCK(ipimap
);
2615 iagp
= (struct iag
*) mp
->data
;
2617 /* remove the iag from the iag free list */
2618 imap
->im_freeiag
= le32_to_cpu(iagp
->iagfree
);
2619 iagp
->iagfree
= cpu_to_le32(-1);
2621 /* set the return iag number and buffer pointer */
2626 /* release the iag free lock */
2627 IAGFREE_UNLOCK(imap
);
2635 * FUNCTION: get the buffer for the specified iag within a fileset
2636 * or aggregate inode map.
2639 * imap - pointer to inode map control structure.
2640 * iagno - iag number.
2641 * bpp - point to buffer pointer to be filled in on successful
2645 * must have read lock on imap inode
2646 * (When called by diExtendFS, the filesystem is quiesced, therefore
2647 * the read lock is unnecessary.)
2653 static int diIAGRead(struct inomap
* imap
, int iagno
, struct metapage
** mpp
)
2655 struct inode
*ipimap
= imap
->im_ipimap
;
2658 /* compute the logical block number of the iag. */
2659 blkno
= IAGTOLBLK(iagno
, JFS_SBI(ipimap
->i_sb
)->l2nbperpage
);
2662 *mpp
= read_metapage(ipimap
, blkno
, PSIZE
, 0);
2671 * NAME: diFindFree()
2673 * FUNCTION: find the first free bit in a word starting at
2674 * the specified bit position.
2677 * word - word to be examined.
2678 * start - starting bit position.
2681 * bit position of first free bit in the word or 32 if
2682 * no free bits were found.
2684 static int diFindFree(u32 word
, int start
)
2688 /* scan the word for the first free bit. */
2689 for (word
<<= start
, bitno
= start
; bitno
< 32;
2690 bitno
++, word
<<= 1) {
2691 if ((word
& HIGHORDER
) == 0)
2698 * NAME: diUpdatePMap()
2700 * FUNCTION: Update the persistent map in an IAG for the allocation or
2701 * freeing of the specified inode.
2703 * PRE CONDITIONS: Working map has already been updated for allocate.
2706 * ipimap - Incore inode map inode
2707 * inum - Number of inode to mark in permanent map
2708 * is_free - If 'true' indicates inode should be marked freed, otherwise
2709 * indicates inode should be marked allocated.
2715 diUpdatePMap(struct inode
*ipimap
,
2716 unsigned long inum
, bool is_free
, struct tblock
* tblk
)
2720 struct metapage
*mp
;
2721 int iagno
, ino
, extno
, bitno
;
2722 struct inomap
*imap
;
2724 struct jfs_log
*log
;
2725 int lsn
, difft
, diffp
;
2726 unsigned long flags
;
2728 imap
= JFS_IP(ipimap
)->i_imap
;
2729 /* get the iag number containing the inode */
2730 iagno
= INOTOIAG(inum
);
2731 /* make sure that the iag is contained within the map */
2732 if (iagno
>= imap
->im_nextiag
) {
2733 jfs_error(ipimap
->i_sb
, "the iag is outside the map\n");
2737 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2738 rc
= diIAGRead(imap
, iagno
, &mp
);
2739 IREAD_UNLOCK(ipimap
);
2742 metapage_wait_for_io(mp
);
2743 iagp
= (struct iag
*) mp
->data
;
2744 /* get the inode number and extent number of the inode within
2745 * the iag and the inode number within the extent.
2747 ino
= inum
& (INOSPERIAG
- 1);
2748 extno
= ino
>> L2INOSPEREXT
;
2749 bitno
= ino
& (INOSPEREXT
- 1);
2750 mask
= HIGHORDER
>> bitno
;
2752 * mark the inode free in persistent map:
2755 /* The inode should have been allocated both in working
2756 * map and in persistent map;
2757 * the inode will be freed from working map at the release
2758 * of last reference release;
2760 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2761 jfs_error(ipimap
->i_sb
,
2762 "inode %ld not marked as allocated in wmap!\n",
2765 if (!(le32_to_cpu(iagp
->pmap
[extno
]) & mask
)) {
2766 jfs_error(ipimap
->i_sb
,
2767 "inode %ld not marked as allocated in pmap!\n",
2770 /* update the bitmap for the extent of the freed inode */
2771 iagp
->pmap
[extno
] &= cpu_to_le32(~mask
);
2774 * mark the inode allocated in persistent map:
2777 /* The inode should be already allocated in the working map
2778 * and should be free in persistent map;
2780 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2781 release_metapage(mp
);
2782 jfs_error(ipimap
->i_sb
,
2783 "the inode is not allocated in the working map\n");
2786 if ((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) {
2787 release_metapage(mp
);
2788 jfs_error(ipimap
->i_sb
,
2789 "the inode is not free in the persistent map\n");
2792 /* update the bitmap for the extent of the allocated inode */
2793 iagp
->pmap
[extno
] |= cpu_to_le32(mask
);
2799 log
= JFS_SBI(tblk
->sb
)->log
;
2800 LOGSYNC_LOCK(log
, flags
);
2802 /* inherit older/smaller lsn */
2803 logdiff(difft
, lsn
, log
);
2804 logdiff(diffp
, mp
->lsn
, log
);
2805 if (difft
< diffp
) {
2807 /* move mp after tblock in logsync list */
2808 list_move(&mp
->synclist
, &tblk
->synclist
);
2810 /* inherit younger/larger clsn */
2812 logdiff(difft
, tblk
->clsn
, log
);
2813 logdiff(diffp
, mp
->clsn
, log
);
2815 mp
->clsn
= tblk
->clsn
;
2819 /* insert mp after tblock in logsync list */
2821 list_add(&mp
->synclist
, &tblk
->synclist
);
2822 mp
->clsn
= tblk
->clsn
;
2824 LOGSYNC_UNLOCK(log
, flags
);
2832 * function: update imap for extendfs();
2834 * note: AG size has been increased s.t. each k old contiguous AGs are
2835 * coalesced into a new AG;
2837 int diExtendFS(struct inode
*ipimap
, struct inode
*ipbmap
)
2840 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
2841 struct iag
*iagp
= NULL
, *hiagp
= NULL
;
2842 struct bmap
*mp
= JFS_SBI(ipbmap
->i_sb
)->bmap
;
2843 struct metapage
*bp
, *hbp
;
2845 int numinos
, xnuminos
= 0, xnumfree
= 0;
2848 jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d",
2849 imap
->im_nextiag
, atomic_read(&imap
->im_numinos
),
2850 atomic_read(&imap
->im_numfree
));
2855 * coalesce contiguous k (newAGSize/oldAGSize) AGs;
2856 * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn;
2857 * note: new AG size = old AG size * (2**x).
2860 /* init per AG control information im_agctl[] */
2861 for (i
= 0; i
< MAXAG
; i
++) {
2862 imap
->im_agctl
[i
].inofree
= -1;
2863 imap
->im_agctl
[i
].extfree
= -1;
2864 imap
->im_agctl
[i
].numinos
= 0; /* number of backed inodes */
2865 imap
->im_agctl
[i
].numfree
= 0; /* number of free backed inodes */
2869 * process each iag page of the map.
2871 * rebuild AG Free Inode List, AG Free Inode Extent List;
2873 for (i
= 0; i
< imap
->im_nextiag
; i
++) {
2874 if ((rc
= diIAGRead(imap
, i
, &bp
))) {
2878 iagp
= (struct iag
*) bp
->data
;
2879 if (le32_to_cpu(iagp
->iagnum
) != i
) {
2880 release_metapage(bp
);
2881 jfs_error(ipimap
->i_sb
, "unexpected value of iagnum\n");
2885 /* leave free iag in the free iag list */
2886 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2887 release_metapage(bp
);
2891 agstart
= le64_to_cpu(iagp
->agstart
);
2892 n
= agstart
>> mp
->db_agl2size
;
2893 iagp
->agstart
= cpu_to_le64((s64
)n
<< mp
->db_agl2size
);
2895 /* compute backed inodes */
2896 numinos
= (EXTSPERIAG
- le32_to_cpu(iagp
->nfreeexts
))
2899 /* merge AG backed inodes */
2900 imap
->im_agctl
[n
].numinos
+= numinos
;
2901 xnuminos
+= numinos
;
2904 /* if any backed free inodes, insert at AG free inode list */
2905 if ((int) le32_to_cpu(iagp
->nfreeinos
) > 0) {
2906 if ((head
= imap
->im_agctl
[n
].inofree
) == -1) {
2907 iagp
->inofreefwd
= cpu_to_le32(-1);
2908 iagp
->inofreeback
= cpu_to_le32(-1);
2910 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2914 hiagp
= (struct iag
*) hbp
->data
;
2915 hiagp
->inofreeback
= iagp
->iagnum
;
2916 iagp
->inofreefwd
= cpu_to_le32(head
);
2917 iagp
->inofreeback
= cpu_to_le32(-1);
2918 write_metapage(hbp
);
2921 imap
->im_agctl
[n
].inofree
=
2922 le32_to_cpu(iagp
->iagnum
);
2924 /* merge AG backed free inodes */
2925 imap
->im_agctl
[n
].numfree
+=
2926 le32_to_cpu(iagp
->nfreeinos
);
2927 xnumfree
+= le32_to_cpu(iagp
->nfreeinos
);
2930 /* if any free extents, insert at AG free extent list */
2931 if (le32_to_cpu(iagp
->nfreeexts
) > 0) {
2932 if ((head
= imap
->im_agctl
[n
].extfree
) == -1) {
2933 iagp
->extfreefwd
= cpu_to_le32(-1);
2934 iagp
->extfreeback
= cpu_to_le32(-1);
2936 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2940 hiagp
= (struct iag
*) hbp
->data
;
2941 hiagp
->extfreeback
= iagp
->iagnum
;
2942 iagp
->extfreefwd
= cpu_to_le32(head
);
2943 iagp
->extfreeback
= cpu_to_le32(-1);
2944 write_metapage(hbp
);
2947 imap
->im_agctl
[n
].extfree
=
2948 le32_to_cpu(iagp
->iagnum
);
2955 if (xnuminos
!= atomic_read(&imap
->im_numinos
) ||
2956 xnumfree
!= atomic_read(&imap
->im_numfree
)) {
2957 jfs_error(ipimap
->i_sb
, "numinos or numfree incorrect\n");
2968 * serialization: IWRITE_LOCK held on entry/exit
2970 * note: shadow page with regular inode (rel.2);
2972 static void duplicateIXtree(struct super_block
*sb
, s64 blkno
,
2973 int xlen
, s64
*xaddr
)
2975 struct jfs_superblock
*j_sb
;
2976 struct buffer_head
*bh
;
2980 /* if AIT2 ipmap2 is bad, do not try to update it */
2981 if (JFS_SBI(sb
)->mntflag
& JFS_BAD_SAIT
) /* s_flag */
2983 ip
= diReadSpecial(sb
, FILESYSTEM_I
, 1);
2985 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
2986 if (readSuper(sb
, &bh
))
2988 j_sb
= (struct jfs_superblock
*)bh
->b_data
;
2989 j_sb
->s_flag
|= cpu_to_le32(JFS_BAD_SAIT
);
2991 mark_buffer_dirty(bh
);
2992 sync_dirty_buffer(bh
);
2997 /* start transaction */
2998 tid
= txBegin(sb
, COMMIT_FORCE
);
2999 /* update the inode map addressing structure to point to it */
3000 if (xtInsert(tid
, ip
, 0, blkno
, xlen
, xaddr
, 0)) {
3001 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
3006 /* update the inode map's inode to reflect the extension */
3007 ip
->i_size
+= PSIZE
;
3008 inode_add_bytes(ip
, PSIZE
);
3009 txCommit(tid
, 1, &ip
, COMMIT_FORCE
);
3016 * NAME: copy_from_dinode()
3018 * FUNCTION: Copies inode info from disk inode to in-memory inode
3022 * -ENOMEM - insufficient memory
3024 static int copy_from_dinode(struct dinode
* dip
, struct inode
*ip
)
3026 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3027 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3029 jfs_ip
->fileset
= le32_to_cpu(dip
->di_fileset
);
3030 jfs_ip
->mode2
= le32_to_cpu(dip
->di_mode
);
3031 jfs_set_inode_flags(ip
);
3033 ip
->i_mode
= le32_to_cpu(dip
->di_mode
) & 0xffff;
3034 if (sbi
->umask
!= -1) {
3035 ip
->i_mode
= (ip
->i_mode
& ~0777) | (0777 & ~sbi
->umask
);
3036 /* For directories, add x permission if r is allowed by umask */
3037 if (S_ISDIR(ip
->i_mode
)) {
3038 if (ip
->i_mode
& 0400)
3040 if (ip
->i_mode
& 0040)
3042 if (ip
->i_mode
& 0004)
3046 set_nlink(ip
, le32_to_cpu(dip
->di_nlink
));
3048 jfs_ip
->saved_uid
= make_kuid(&init_user_ns
, le32_to_cpu(dip
->di_uid
));
3049 if (!uid_valid(sbi
->uid
))
3050 ip
->i_uid
= jfs_ip
->saved_uid
;
3052 ip
->i_uid
= sbi
->uid
;
3055 jfs_ip
->saved_gid
= make_kgid(&init_user_ns
, le32_to_cpu(dip
->di_gid
));
3056 if (!gid_valid(sbi
->gid
))
3057 ip
->i_gid
= jfs_ip
->saved_gid
;
3059 ip
->i_gid
= sbi
->gid
;
3062 ip
->i_size
= le64_to_cpu(dip
->di_size
);
3063 ip
->i_atime
.tv_sec
= le32_to_cpu(dip
->di_atime
.tv_sec
);
3064 ip
->i_atime
.tv_nsec
= le32_to_cpu(dip
->di_atime
.tv_nsec
);
3065 ip
->i_mtime
.tv_sec
= le32_to_cpu(dip
->di_mtime
.tv_sec
);
3066 ip
->i_mtime
.tv_nsec
= le32_to_cpu(dip
->di_mtime
.tv_nsec
);
3067 ip
->i_ctime
.tv_sec
= le32_to_cpu(dip
->di_ctime
.tv_sec
);
3068 ip
->i_ctime
.tv_nsec
= le32_to_cpu(dip
->di_ctime
.tv_nsec
);
3069 ip
->i_blocks
= LBLK2PBLK(ip
->i_sb
, le64_to_cpu(dip
->di_nblocks
));
3070 ip
->i_generation
= le32_to_cpu(dip
->di_gen
);
3072 jfs_ip
->ixpxd
= dip
->di_ixpxd
; /* in-memory pxd's are little-endian */
3073 jfs_ip
->acl
= dip
->di_acl
; /* as are dxd's */
3074 jfs_ip
->ea
= dip
->di_ea
;
3075 jfs_ip
->next_index
= le32_to_cpu(dip
->di_next_index
);
3076 jfs_ip
->otime
= le32_to_cpu(dip
->di_otime
.tv_sec
);
3077 jfs_ip
->acltype
= le32_to_cpu(dip
->di_acltype
);
3079 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
)) {
3080 jfs_ip
->dev
= le32_to_cpu(dip
->di_rdev
);
3081 ip
->i_rdev
= new_decode_dev(jfs_ip
->dev
);
3084 if (S_ISDIR(ip
->i_mode
)) {
3085 memcpy(&jfs_ip
->u
.dir
, &dip
->u
._dir
, 384);
3086 } else if (S_ISREG(ip
->i_mode
) || S_ISLNK(ip
->i_mode
)) {
3087 memcpy(&jfs_ip
->i_xtroot
, &dip
->di_xtroot
, 288);
3089 memcpy(&jfs_ip
->i_inline_ea
, &dip
->di_inlineea
, 128);
3091 /* Zero the in-memory-only stuff */
3093 jfs_ip
->btindex
= 0;
3094 jfs_ip
->btorder
= 0;
3097 jfs_ip
->atlhead
= 0;
3098 jfs_ip
->atltail
= 0;
3104 * NAME: copy_to_dinode()
3106 * FUNCTION: Copies inode info from in-memory inode to disk inode
3108 static void copy_to_dinode(struct dinode
* dip
, struct inode
*ip
)
3110 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3111 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3113 dip
->di_fileset
= cpu_to_le32(jfs_ip
->fileset
);
3114 dip
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
3115 dip
->di_number
= cpu_to_le32(ip
->i_ino
);
3116 dip
->di_gen
= cpu_to_le32(ip
->i_generation
);
3117 dip
->di_size
= cpu_to_le64(ip
->i_size
);
3118 dip
->di_nblocks
= cpu_to_le64(PBLK2LBLK(ip
->i_sb
, ip
->i_blocks
));
3119 dip
->di_nlink
= cpu_to_le32(ip
->i_nlink
);
3120 if (!uid_valid(sbi
->uid
))
3121 dip
->di_uid
= cpu_to_le32(i_uid_read(ip
));
3123 dip
->di_uid
=cpu_to_le32(from_kuid(&init_user_ns
,
3124 jfs_ip
->saved_uid
));
3125 if (!gid_valid(sbi
->gid
))
3126 dip
->di_gid
= cpu_to_le32(i_gid_read(ip
));
3128 dip
->di_gid
= cpu_to_le32(from_kgid(&init_user_ns
,
3129 jfs_ip
->saved_gid
));
3131 * mode2 is only needed for storing the higher order bits.
3132 * Trust i_mode for the lower order ones
3134 if (sbi
->umask
== -1)
3135 dip
->di_mode
= cpu_to_le32((jfs_ip
->mode2
& 0xffff0000) |
3137 else /* Leave the original permissions alone */
3138 dip
->di_mode
= cpu_to_le32(jfs_ip
->mode2
);
3140 dip
->di_atime
.tv_sec
= cpu_to_le32(ip
->i_atime
.tv_sec
);
3141 dip
->di_atime
.tv_nsec
= cpu_to_le32(ip
->i_atime
.tv_nsec
);
3142 dip
->di_ctime
.tv_sec
= cpu_to_le32(ip
->i_ctime
.tv_sec
);
3143 dip
->di_ctime
.tv_nsec
= cpu_to_le32(ip
->i_ctime
.tv_nsec
);
3144 dip
->di_mtime
.tv_sec
= cpu_to_le32(ip
->i_mtime
.tv_sec
);
3145 dip
->di_mtime
.tv_nsec
= cpu_to_le32(ip
->i_mtime
.tv_nsec
);
3146 dip
->di_ixpxd
= jfs_ip
->ixpxd
; /* in-memory pxd's are little-endian */
3147 dip
->di_acl
= jfs_ip
->acl
; /* as are dxd's */
3148 dip
->di_ea
= jfs_ip
->ea
;
3149 dip
->di_next_index
= cpu_to_le32(jfs_ip
->next_index
);
3150 dip
->di_otime
.tv_sec
= cpu_to_le32(jfs_ip
->otime
);
3151 dip
->di_otime
.tv_nsec
= 0;
3152 dip
->di_acltype
= cpu_to_le32(jfs_ip
->acltype
);
3153 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
))
3154 dip
->di_rdev
= cpu_to_le32(jfs_ip
->dev
);