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"
62 /* iag free list lock */
63 #define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock)
64 #define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock)
65 #define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock)
67 /* per ag iag list locks */
68 #define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index]))
69 #define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno])
70 #define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno])
75 static int diAllocAG(struct inomap
*, int, bool, struct inode
*);
76 static int diAllocAny(struct inomap
*, int, bool, struct inode
*);
77 static int diAllocBit(struct inomap
*, struct iag
*, int);
78 static int diAllocExt(struct inomap
*, int, struct inode
*);
79 static int diAllocIno(struct inomap
*, int, struct inode
*);
80 static int diFindFree(u32
, int);
81 static int diNewExt(struct inomap
*, struct iag
*, int);
82 static int diNewIAG(struct inomap
*, int *, int, struct metapage
**);
83 static void duplicateIXtree(struct super_block
*, s64
, int, s64
*);
85 static int diIAGRead(struct inomap
* imap
, int, struct metapage
**);
86 static int copy_from_dinode(struct dinode
*, struct inode
*);
87 static void copy_to_dinode(struct dinode
*, struct inode
*);
92 * FUNCTION: initialize the incore inode map control structures for
93 * a fileset or aggregate init time.
95 * the inode map's control structure (dinomap) is
96 * brought in from disk and placed in virtual memory.
99 * ipimap - pointer to inode map inode for the aggregate or fileset.
103 * -ENOMEM - insufficient free virtual memory.
106 int diMount(struct inode
*ipimap
)
111 struct dinomap_disk
*dinom_le
;
114 * allocate/initialize the in-memory inode map control structure
116 /* allocate the in-memory inode map control structure. */
117 imap
= kmalloc(sizeof(struct inomap
), GFP_KERNEL
);
119 jfs_err("diMount: kmalloc returned NULL!");
123 /* read the on-disk inode map control structure. */
125 mp
= read_metapage(ipimap
,
126 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
133 /* copy the on-disk version to the in-memory version. */
134 dinom_le
= (struct dinomap_disk
*) mp
->data
;
135 imap
->im_freeiag
= le32_to_cpu(dinom_le
->in_freeiag
);
136 imap
->im_nextiag
= le32_to_cpu(dinom_le
->in_nextiag
);
137 atomic_set(&imap
->im_numinos
, le32_to_cpu(dinom_le
->in_numinos
));
138 atomic_set(&imap
->im_numfree
, le32_to_cpu(dinom_le
->in_numfree
));
139 imap
->im_nbperiext
= le32_to_cpu(dinom_le
->in_nbperiext
);
140 imap
->im_l2nbperiext
= le32_to_cpu(dinom_le
->in_l2nbperiext
);
141 for (index
= 0; index
< MAXAG
; index
++) {
142 imap
->im_agctl
[index
].inofree
=
143 le32_to_cpu(dinom_le
->in_agctl
[index
].inofree
);
144 imap
->im_agctl
[index
].extfree
=
145 le32_to_cpu(dinom_le
->in_agctl
[index
].extfree
);
146 imap
->im_agctl
[index
].numinos
=
147 le32_to_cpu(dinom_le
->in_agctl
[index
].numinos
);
148 imap
->im_agctl
[index
].numfree
=
149 le32_to_cpu(dinom_le
->in_agctl
[index
].numfree
);
152 /* release the buffer. */
153 release_metapage(mp
);
156 * allocate/initialize inode allocation map locks
158 /* allocate and init iag free list lock */
159 IAGFREE_LOCK_INIT(imap
);
161 /* allocate and init ag list locks */
162 for (index
= 0; index
< MAXAG
; index
++) {
163 AG_LOCK_INIT(imap
, index
);
166 /* bind the inode map inode and inode map control structure
169 imap
->im_ipimap
= ipimap
;
170 JFS_IP(ipimap
)->i_imap
= imap
;
179 * FUNCTION: write to disk the incore inode map control structures for
180 * a fileset or aggregate at unmount time.
183 * ipimap - pointer to inode map inode for the aggregate or fileset.
187 * -ENOMEM - insufficient free virtual memory.
190 int diUnmount(struct inode
*ipimap
, int mounterror
)
192 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
195 * update the on-disk inode map control structure
198 if (!(mounterror
|| isReadOnly(ipimap
)))
202 * Invalidate the page cache buffers
204 truncate_inode_pages(ipimap
->i_mapping
, 0);
207 * free in-memory control structure
218 int diSync(struct inode
*ipimap
)
220 struct dinomap_disk
*dinom_le
;
221 struct inomap
*imp
= JFS_IP(ipimap
)->i_imap
;
226 * write imap global conrol page
228 /* read the on-disk inode map control structure */
229 mp
= get_metapage(ipimap
,
230 IMAPBLKNO
<< JFS_SBI(ipimap
->i_sb
)->l2nbperpage
,
233 jfs_err("diSync: get_metapage failed!");
237 /* copy the in-memory version to the on-disk version */
238 dinom_le
= (struct dinomap_disk
*) mp
->data
;
239 dinom_le
->in_freeiag
= cpu_to_le32(imp
->im_freeiag
);
240 dinom_le
->in_nextiag
= cpu_to_le32(imp
->im_nextiag
);
241 dinom_le
->in_numinos
= cpu_to_le32(atomic_read(&imp
->im_numinos
));
242 dinom_le
->in_numfree
= cpu_to_le32(atomic_read(&imp
->im_numfree
));
243 dinom_le
->in_nbperiext
= cpu_to_le32(imp
->im_nbperiext
);
244 dinom_le
->in_l2nbperiext
= cpu_to_le32(imp
->im_l2nbperiext
);
245 for (index
= 0; index
< MAXAG
; index
++) {
246 dinom_le
->in_agctl
[index
].inofree
=
247 cpu_to_le32(imp
->im_agctl
[index
].inofree
);
248 dinom_le
->in_agctl
[index
].extfree
=
249 cpu_to_le32(imp
->im_agctl
[index
].extfree
);
250 dinom_le
->in_agctl
[index
].numinos
=
251 cpu_to_le32(imp
->im_agctl
[index
].numinos
);
252 dinom_le
->in_agctl
[index
].numfree
=
253 cpu_to_le32(imp
->im_agctl
[index
].numfree
);
256 /* write out the control structure */
260 * write out dirty pages of imap
262 filemap_write_and_wait(ipimap
->i_mapping
);
264 diWriteSpecial(ipimap
, 0);
273 * FUNCTION: initialize an incore inode from disk.
275 * on entry, the specifed incore inode should itself
276 * specify the disk inode number corresponding to the
277 * incore inode (i.e. i_number should be initialized).
279 * this routine handles incore inode initialization for
280 * both "special" and "regular" inodes. special inodes
281 * are those required early in the mount process and
282 * require special handling since much of the file system
283 * is not yet initialized. these "special" inodes are
284 * identified by a NULL inode map inode pointer and are
285 * actually initialized by a call to diReadSpecial().
287 * for regular inodes, the iag describing the disk inode
288 * is read from disk to determine the inode extent address
289 * for the disk inode. with the inode extent address in
290 * hand, the page of the extent that contains the disk
291 * inode is read and the disk inode is copied to the
295 * ip - pointer to incore inode to be initialized from disk.
300 * -ENOMEM - insufficient memory
303 int diRead(struct inode
*ip
)
305 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
306 int iagno
, ino
, extno
, rc
;
307 struct inode
*ipimap
;
315 unsigned long pageno
;
318 jfs_info("diRead: ino = %ld", ip
->i_ino
);
320 ipimap
= sbi
->ipimap
;
321 JFS_IP(ip
)->ipimap
= ipimap
;
323 /* determine the iag number for this inode (number) */
324 iagno
= INOTOIAG(ip
->i_ino
);
327 imap
= JFS_IP(ipimap
)->i_imap
;
328 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
329 rc
= diIAGRead(imap
, iagno
, &mp
);
330 IREAD_UNLOCK(ipimap
);
332 jfs_err("diRead: diIAGRead returned %d", rc
);
336 iagp
= (struct iag
*) mp
->data
;
338 /* determine inode extent that holds the disk inode */
339 ino
= ip
->i_ino
& (INOSPERIAG
- 1);
340 extno
= ino
>> L2INOSPEREXT
;
342 if ((lengthPXD(&iagp
->inoext
[extno
]) != imap
->im_nbperiext
) ||
343 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
344 release_metapage(mp
);
348 /* get disk block number of the page within the inode extent
349 * that holds the disk inode.
351 blkno
= INOPBLK(&iagp
->inoext
[extno
], ino
, sbi
->l2nbperpage
);
353 /* get the ag for the iag */
354 agstart
= le64_to_cpu(iagp
->agstart
);
356 release_metapage(mp
);
358 rel_inode
= (ino
& (INOSPERPAGE
- 1));
359 pageno
= blkno
>> sbi
->l2nbperpage
;
361 if ((block_offset
= ((u32
) blkno
& (sbi
->nbperpage
- 1)))) {
363 * OS/2 didn't always align inode extents on page boundaries
366 (sbi
->nbperpage
- block_offset
) << sbi
->l2niperblk
;
368 if (rel_inode
< inodes_left
)
369 rel_inode
+= block_offset
<< sbi
->l2niperblk
;
372 rel_inode
-= inodes_left
;
376 /* read the page of disk inode */
377 mp
= read_metapage(ipimap
, pageno
<< sbi
->l2nbperpage
, PSIZE
, 1);
379 jfs_err("diRead: read_metapage failed");
383 /* locate the disk inode requested */
384 dp
= (struct dinode
*) mp
->data
;
387 if (ip
->i_ino
!= le32_to_cpu(dp
->di_number
)) {
388 jfs_error(ip
->i_sb
, "diRead: i_ino != di_number");
390 } else if (le32_to_cpu(dp
->di_nlink
) == 0)
393 /* copy the disk inode to the in-memory inode */
394 rc
= copy_from_dinode(dp
, ip
);
396 release_metapage(mp
);
398 /* set the ag for the inode */
399 JFS_IP(ip
)->agno
= BLKTOAG(agstart
, sbi
);
400 JFS_IP(ip
)->active_ag
= -1;
407 * NAME: diReadSpecial()
409 * FUNCTION: initialize a 'special' inode from disk.
411 * this routines handles aggregate level inodes. The
412 * inode cache cannot differentiate between the
413 * aggregate inodes and the filesystem inodes, so we
414 * handle these here. We don't actually use the aggregate
415 * inode map, since these inodes are at a fixed location
416 * and in some cases the aggregate inode map isn't initialized
420 * sb - filesystem superblock
421 * inum - aggregate inode number
422 * secondary - 1 if secondary aggregate inode table
425 * new inode - success
428 struct inode
*diReadSpecial(struct super_block
*sb
, ino_t inum
, int secondary
)
430 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
438 jfs_err("diReadSpecial: new_inode returned NULL!");
443 address
= addressPXD(&sbi
->ait2
) >> sbi
->l2nbperpage
;
444 JFS_IP(ip
)->ipimap
= sbi
->ipaimap2
;
446 address
= AITBL_OFF
>> L2PSIZE
;
447 JFS_IP(ip
)->ipimap
= sbi
->ipaimap
;
450 ASSERT(inum
< INOSPEREXT
);
454 address
+= inum
>> 3; /* 8 inodes per 4K page */
456 /* read the page of fixed disk inode (AIT) in raw mode */
457 mp
= read_metapage(ip
, address
<< sbi
->l2nbperpage
, PSIZE
, 1);
459 ip
->i_nlink
= 1; /* Don't want iput() deleting it */
464 /* get the pointer to the disk inode of interest */
465 dp
= (struct dinode
*) (mp
->data
);
466 dp
+= inum
% 8; /* 8 inodes per 4K page */
468 /* copy on-disk inode to in-memory inode */
469 if ((copy_from_dinode(dp
, ip
)) != 0) {
470 /* handle bad return by returning NULL for ip */
471 ip
->i_nlink
= 1; /* Don't want iput() deleting it */
473 /* release the page */
474 release_metapage(mp
);
479 ip
->i_mapping
->a_ops
= &jfs_metapage_aops
;
480 mapping_set_gfp_mask(ip
->i_mapping
, GFP_NOFS
);
482 /* Allocations to metadata inodes should not affect quotas */
483 ip
->i_flags
|= S_NOQUOTA
;
485 if ((inum
== FILESYSTEM_I
) && (JFS_IP(ip
)->ipimap
== sbi
->ipaimap
)) {
486 sbi
->gengen
= le32_to_cpu(dp
->di_gengen
);
487 sbi
->inostamp
= le32_to_cpu(dp
->di_inostamp
);
490 /* release the page */
491 release_metapage(mp
);
494 * __mark_inode_dirty expects inodes to be hashed. Since we don't
495 * want special inodes in the fileset inode space, we make them
496 * appear hashed, but do not put on any lists. hlist_del()
497 * will work fine and require no locking.
499 ip
->i_hash
.pprev
= &ip
->i_hash
.next
;
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
805 lv
= & dilinelock
->lv
[dilinelock
->index
];
806 lv
->offset
= dioffset
>> L2INODESLOTSIZE
;
807 copy_to_dinode(dp
, ip
);
808 if (test_and_clear_cflag(COMMIT_Dirtable
, ip
)) {
810 memcpy(&dp
->di_dirtable
, &jfs_ip
->i_dirtable
, 96);
815 /* release the buffer holding the updated on-disk inode.
816 * the buffer will be later written by commit processing.
827 * FUNCTION: free a specified inode from the inode working map
828 * for a fileset or aggregate.
830 * if the inode to be freed represents the first (only)
831 * free inode within the iag, the iag will be placed on
832 * the ag free inode list.
834 * freeing the inode will cause the inode extent to be
835 * freed if the inode is the only allocated inode within
836 * the extent. in this case all the disk resource backing
837 * up the inode extent will be freed. in addition, the iag
838 * will be placed on the ag extent free list if the extent
839 * is the first free extent in the iag. if freeing the
840 * extent also means that no free inodes will exist for
841 * the iag, the iag will also be removed from the ag free
844 * the iag describing the inode will be freed if the extent
845 * is to be freed and it is the only backed extent within
846 * the iag. in this case, the iag will be removed from the
847 * ag free extent list and ag free inode list and placed on
848 * the inode map's free iag list.
850 * a careful update approach is used to provide consistency
851 * in the face of updates to multiple buffers. under this
852 * approach, all required buffers are obtained before making
853 * any updates and are held until all updates are complete.
856 * ip - inode to be freed.
862 int diFree(struct inode
*ip
)
865 ino_t inum
= ip
->i_ino
;
866 struct iag
*iagp
, *aiagp
, *biagp
, *ciagp
, *diagp
;
867 struct metapage
*mp
, *amp
, *bmp
, *cmp
, *dmp
;
868 int iagno
, ino
, extno
, bitno
, sword
, agno
;
871 struct inode
*ipimap
= JFS_SBI(ip
->i_sb
)->ipimap
;
872 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
875 struct inode
*iplist
[3];
877 struct pxd_lock
*pxdlock
;
880 * This is just to suppress compiler warnings. The same logic that
881 * references these variables is used to initialize them.
883 aiagp
= biagp
= ciagp
= diagp
= NULL
;
885 /* get the iag number containing the inode.
887 iagno
= INOTOIAG(inum
);
889 /* make sure that the iag is contained within
892 if (iagno
>= imap
->im_nextiag
) {
893 print_hex_dump(KERN_ERR
, "imap: ", DUMP_PREFIX_ADDRESS
, 16, 4,
896 "diFree: inum = %d, iagno = %d, nextiag = %d",
897 (uint
) inum
, iagno
, imap
->im_nextiag
);
901 /* get the allocation group for this ino.
903 agno
= JFS_IP(ip
)->agno
;
905 /* Lock the AG specific inode map information
909 /* Obtain read lock in imap inode. Don't release it until we have
910 * read all of the IAG's that we are going to.
912 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
916 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
917 IREAD_UNLOCK(ipimap
);
918 AG_UNLOCK(imap
, agno
);
921 iagp
= (struct iag
*) mp
->data
;
923 /* get the inode number and extent number of the inode within
924 * the iag and the inode number within the extent.
926 ino
= inum
& (INOSPERIAG
- 1);
927 extno
= ino
>> L2INOSPEREXT
;
928 bitno
= ino
& (INOSPEREXT
- 1);
929 mask
= HIGHORDER
>> bitno
;
931 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
933 "diFree: wmap shows inode already free");
936 if (!addressPXD(&iagp
->inoext
[extno
])) {
937 release_metapage(mp
);
938 IREAD_UNLOCK(ipimap
);
939 AG_UNLOCK(imap
, agno
);
940 jfs_error(ip
->i_sb
, "diFree: invalid inoext");
944 /* compute the bitmap for the extent reflecting the freed inode.
946 bitmap
= le32_to_cpu(iagp
->wmap
[extno
]) & ~mask
;
948 if (imap
->im_agctl
[agno
].numfree
> imap
->im_agctl
[agno
].numinos
) {
949 release_metapage(mp
);
950 IREAD_UNLOCK(ipimap
);
951 AG_UNLOCK(imap
, agno
);
952 jfs_error(ip
->i_sb
, "diFree: numfree > numinos");
956 * inode extent still has some inodes or below low water mark:
957 * keep the inode extent;
960 imap
->im_agctl
[agno
].numfree
< 96 ||
961 (imap
->im_agctl
[agno
].numfree
< 288 &&
962 (((imap
->im_agctl
[agno
].numfree
* 100) /
963 imap
->im_agctl
[agno
].numinos
) <= 25))) {
964 /* if the iag currently has no free inodes (i.e.,
965 * the inode being freed is the first free inode of iag),
966 * insert the iag at head of the inode free list for the ag.
968 if (iagp
->nfreeinos
== 0) {
969 /* check if there are any iags on the ag inode
970 * free list. if so, read the first one so that
971 * we can link the current iag onto the list at
974 if ((fwd
= imap
->im_agctl
[agno
].inofree
) >= 0) {
975 /* read the iag that currently is the head
978 if ((rc
= diIAGRead(imap
, fwd
, &
))) {
979 IREAD_UNLOCK(ipimap
);
980 AG_UNLOCK(imap
, agno
);
981 release_metapage(mp
);
984 aiagp
= (struct iag
*) amp
->data
;
986 /* make current head point back to the iag.
988 aiagp
->inofreeback
= cpu_to_le32(iagno
);
993 /* iag points forward to current head and iag
994 * becomes the new head of the list.
997 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
998 iagp
->inofreeback
= cpu_to_le32(-1);
999 imap
->im_agctl
[agno
].inofree
= iagno
;
1001 IREAD_UNLOCK(ipimap
);
1003 /* update the free inode summary map for the extent if
1004 * freeing the inode means the extent will now have free
1005 * inodes (i.e., the inode being freed is the first free
1008 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
1009 sword
= extno
>> L2EXTSPERSUM
;
1010 bitno
= extno
& (EXTSPERSUM
- 1);
1011 iagp
->inosmap
[sword
] &=
1012 cpu_to_le32(~(HIGHORDER
>> bitno
));
1015 /* update the bitmap.
1017 iagp
->wmap
[extno
] = cpu_to_le32(bitmap
);
1019 /* update the free inode counts at the iag, ag and
1022 le32_add_cpu(&iagp
->nfreeinos
, 1);
1023 imap
->im_agctl
[agno
].numfree
+= 1;
1024 atomic_inc(&imap
->im_numfree
);
1026 /* release the AG inode map lock
1028 AG_UNLOCK(imap
, agno
);
1038 * inode extent has become free and above low water mark:
1039 * free the inode extent;
1043 * prepare to update iag list(s) (careful update step 1)
1045 amp
= bmp
= cmp
= dmp
= NULL
;
1048 /* check if the iag currently has no free extents. if so,
1049 * it will be placed on the head of the ag extent free list.
1051 if (iagp
->nfreeexts
== 0) {
1052 /* check if the ag extent free list has any iags.
1053 * if so, read the iag at the head of the list now.
1054 * this (head) iag will be updated later to reflect
1055 * the addition of the current iag at the head of
1058 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
1059 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1061 aiagp
= (struct iag
*) amp
->data
;
1064 /* iag has free extents. check if the addition of a free
1065 * extent will cause all extents to be free within this
1066 * iag. if so, the iag will be removed from the ag extent
1067 * free list and placed on the inode map's free iag list.
1069 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1070 /* in preparation for removing the iag from the
1071 * ag extent free list, read the iags preceeding
1072 * and following the iag on the ag extent free
1075 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
1076 if ((rc
= diIAGRead(imap
, fwd
, &
)))
1078 aiagp
= (struct iag
*) amp
->data
;
1081 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
1082 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
1084 biagp
= (struct iag
*) bmp
->data
;
1089 /* remove the iag from the ag inode free list if freeing
1090 * this extent cause the iag to have no free inodes.
1092 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1093 int inofreeback
= le32_to_cpu(iagp
->inofreeback
);
1094 int inofreefwd
= le32_to_cpu(iagp
->inofreefwd
);
1096 /* in preparation for removing the iag from the
1097 * ag inode free list, read the iags preceeding
1098 * and following the iag on the ag inode free
1099 * list. before reading these iags, we must make
1100 * sure that we already don't have them in hand
1101 * from up above, since re-reading an iag (buffer)
1102 * we are currently holding would cause a deadlock.
1104 if (inofreefwd
>= 0) {
1106 if (inofreefwd
== fwd
)
1107 ciagp
= (struct iag
*) amp
->data
;
1108 else if (inofreefwd
== back
)
1109 ciagp
= (struct iag
*) bmp
->data
;
1112 diIAGRead(imap
, inofreefwd
, &cmp
)))
1114 ciagp
= (struct iag
*) cmp
->data
;
1116 assert(ciagp
!= NULL
);
1119 if (inofreeback
>= 0) {
1120 if (inofreeback
== fwd
)
1121 diagp
= (struct iag
*) amp
->data
;
1122 else if (inofreeback
== back
)
1123 diagp
= (struct iag
*) bmp
->data
;
1126 diIAGRead(imap
, inofreeback
, &dmp
)))
1128 diagp
= (struct iag
*) dmp
->data
;
1130 assert(diagp
!= NULL
);
1134 IREAD_UNLOCK(ipimap
);
1137 * invalidate any page of the inode extent freed from buffer cache;
1139 freepxd
= iagp
->inoext
[extno
];
1140 invalidate_pxd_metapages(ip
, freepxd
);
1143 * update iag list(s) (careful update step 2)
1145 /* add the iag to the ag extent free list if this is the
1146 * first free extent for the iag.
1148 if (iagp
->nfreeexts
== 0) {
1150 aiagp
->extfreeback
= cpu_to_le32(iagno
);
1153 cpu_to_le32(imap
->im_agctl
[agno
].extfree
);
1154 iagp
->extfreeback
= cpu_to_le32(-1);
1155 imap
->im_agctl
[agno
].extfree
= iagno
;
1157 /* remove the iag from the ag extent list if all extents
1158 * are now free and place it on the inode map iag free list.
1160 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
- 1)) {
1162 aiagp
->extfreeback
= iagp
->extfreeback
;
1165 biagp
->extfreefwd
= iagp
->extfreefwd
;
1167 imap
->im_agctl
[agno
].extfree
=
1168 le32_to_cpu(iagp
->extfreefwd
);
1170 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
1173 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1174 imap
->im_freeiag
= iagno
;
1175 IAGFREE_UNLOCK(imap
);
1179 /* remove the iag from the ag inode free list if freeing
1180 * this extent causes the iag to have no free inodes.
1182 if (iagp
->nfreeinos
== cpu_to_le32(INOSPEREXT
- 1)) {
1183 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0)
1184 ciagp
->inofreeback
= iagp
->inofreeback
;
1186 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0)
1187 diagp
->inofreefwd
= iagp
->inofreefwd
;
1189 imap
->im_agctl
[agno
].inofree
=
1190 le32_to_cpu(iagp
->inofreefwd
);
1192 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
1195 /* update the inode extent address and working map
1196 * to reflect the free extent.
1197 * the permanent map should have been updated already
1198 * for the inode being freed.
1200 if (iagp
->pmap
[extno
] != 0) {
1201 jfs_error(ip
->i_sb
, "diFree: the pmap does not show inode free");
1203 iagp
->wmap
[extno
] = 0;
1204 PXDlength(&iagp
->inoext
[extno
], 0);
1205 PXDaddress(&iagp
->inoext
[extno
], 0);
1207 /* update the free extent and free inode summary maps
1208 * to reflect the freed extent.
1209 * the inode summary map is marked to indicate no inodes
1210 * available for the freed extent.
1212 sword
= extno
>> L2EXTSPERSUM
;
1213 bitno
= extno
& (EXTSPERSUM
- 1);
1214 mask
= HIGHORDER
>> bitno
;
1215 iagp
->inosmap
[sword
] |= cpu_to_le32(mask
);
1216 iagp
->extsmap
[sword
] &= cpu_to_le32(~mask
);
1218 /* update the number of free inodes and number of free extents
1221 le32_add_cpu(&iagp
->nfreeinos
, -(INOSPEREXT
- 1));
1222 le32_add_cpu(&iagp
->nfreeexts
, 1);
1224 /* update the number of free inodes and backed inodes
1225 * at the ag and inode map level.
1227 imap
->im_agctl
[agno
].numfree
-= (INOSPEREXT
- 1);
1228 imap
->im_agctl
[agno
].numinos
-= INOSPEREXT
;
1229 atomic_sub(INOSPEREXT
- 1, &imap
->im_numfree
);
1230 atomic_sub(INOSPEREXT
, &imap
->im_numinos
);
1233 write_metapage(amp
);
1235 write_metapage(bmp
);
1237 write_metapage(cmp
);
1239 write_metapage(dmp
);
1242 * start transaction to update block allocation map
1243 * for the inode extent freed;
1245 * N.B. AG_LOCK is released and iag will be released below, and
1246 * other thread may allocate inode from/reusing the ixad freed
1247 * BUT with new/different backing inode extent from the extent
1248 * to be freed by the transaction;
1250 tid
= txBegin(ipimap
->i_sb
, COMMIT_FORCE
);
1251 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
1253 /* acquire tlock of the iag page of the freed ixad
1254 * to force the page NOHOMEOK (even though no data is
1255 * logged from the iag page) until NOREDOPAGE|FREEXTENT log
1256 * for the free of the extent is committed;
1257 * write FREEXTENT|NOREDOPAGE log record
1258 * N.B. linelock is overlaid as freed extent descriptor;
1260 tlck
= txLock(tid
, ipimap
, mp
, tlckINODE
| tlckFREE
);
1261 pxdlock
= (struct pxd_lock
*) & tlck
->lock
;
1262 pxdlock
->flag
= mlckFREEPXD
;
1263 pxdlock
->pxd
= freepxd
;
1271 * logredo needs the IAG number and IAG extent index in order
1272 * to ensure that the IMap is consistent. The least disruptive
1273 * way to pass these values through to the transaction manager
1274 * is in the iplist array.
1276 * It's not pretty, but it works.
1278 iplist
[1] = (struct inode
*) (size_t)iagno
;
1279 iplist
[2] = (struct inode
*) (size_t)extno
;
1281 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
1284 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
1286 /* unlock the AG inode map information */
1287 AG_UNLOCK(imap
, agno
);
1292 IREAD_UNLOCK(ipimap
);
1295 release_metapage(amp
);
1297 release_metapage(bmp
);
1299 release_metapage(cmp
);
1301 release_metapage(dmp
);
1303 AG_UNLOCK(imap
, agno
);
1305 release_metapage(mp
);
1311 * There are several places in the diAlloc* routines where we initialize
1315 diInitInode(struct inode
*ip
, int iagno
, int ino
, int extno
, struct iag
* iagp
)
1317 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
1318 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
1320 ip
->i_ino
= (iagno
<< L2INOSPERIAG
) + ino
;
1321 jfs_ip
->ixpxd
= iagp
->inoext
[extno
];
1322 jfs_ip
->agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), sbi
);
1323 jfs_ip
->active_ag
= -1;
1328 * NAME: diAlloc(pip,dir,ip)
1330 * FUNCTION: allocate a disk inode from the inode working map
1331 * for a fileset or aggregate.
1334 * pip - pointer to incore inode for the parent inode.
1335 * dir - 'true' if the new disk inode is for a directory.
1336 * ip - pointer to a new inode
1340 * -ENOSPC - insufficient disk resources.
1343 int diAlloc(struct inode
*pip
, bool dir
, struct inode
*ip
)
1345 int rc
, ino
, iagno
, addext
, extno
, bitno
, sword
;
1346 int nwords
, rem
, i
, agno
;
1347 u32 mask
, inosmap
, extsmap
;
1348 struct inode
*ipimap
;
1349 struct metapage
*mp
;
1352 struct inomap
*imap
;
1354 /* get the pointers to the inode map inode and the
1355 * corresponding imap control structure.
1357 ipimap
= JFS_SBI(pip
->i_sb
)->ipimap
;
1358 imap
= JFS_IP(ipimap
)->i_imap
;
1359 JFS_IP(ip
)->ipimap
= ipimap
;
1360 JFS_IP(ip
)->fileset
= FILESYSTEM_I
;
1362 /* for a directory, the allocation policy is to start
1363 * at the ag level using the preferred ag.
1366 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1367 AG_LOCK(imap
, agno
);
1371 /* for files, the policy starts off by trying to allocate from
1372 * the same iag containing the parent disk inode:
1373 * try to allocate the new disk inode close to the parent disk
1374 * inode, using parent disk inode number + 1 as the allocation
1375 * hint. (we use a left-to-right policy to attempt to avoid
1376 * moving backward on the disk.) compute the hint within the
1377 * file system and the iag.
1380 /* get the ag number of this iag */
1381 agno
= JFS_IP(pip
)->agno
;
1383 if (atomic_read(&JFS_SBI(pip
->i_sb
)->bmap
->db_active
[agno
])) {
1385 * There is an open file actively growing. We want to
1386 * allocate new inodes from a different ag to avoid
1387 * fragmentation problems.
1389 agno
= dbNextAG(JFS_SBI(pip
->i_sb
)->ipbmap
);
1390 AG_LOCK(imap
, agno
);
1394 inum
= pip
->i_ino
+ 1;
1395 ino
= inum
& (INOSPERIAG
- 1);
1397 /* back off the hint if it is outside of the iag */
1401 /* lock the AG inode map information */
1402 AG_LOCK(imap
, agno
);
1404 /* Get read lock on imap inode */
1405 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
1407 /* get the iag number and read the iag */
1408 iagno
= INOTOIAG(inum
);
1409 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1410 IREAD_UNLOCK(ipimap
);
1411 AG_UNLOCK(imap
, agno
);
1414 iagp
= (struct iag
*) mp
->data
;
1416 /* determine if new inode extent is allowed to be added to the iag.
1417 * new inode extent can be added to the iag if the ag
1418 * has less than 32 free disk inodes and the iag has free extents.
1420 addext
= (imap
->im_agctl
[agno
].numfree
< 32 && iagp
->nfreeexts
);
1423 * try to allocate from the IAG
1425 /* check if the inode may be allocated from the iag
1426 * (i.e. the inode has free inodes or new extent can be added).
1428 if (iagp
->nfreeinos
|| addext
) {
1429 /* determine the extent number of the hint.
1431 extno
= ino
>> L2INOSPEREXT
;
1433 /* check if the extent containing the hint has backed
1434 * inodes. if so, try to allocate within this extent.
1436 if (addressPXD(&iagp
->inoext
[extno
])) {
1437 bitno
= ino
& (INOSPEREXT
- 1);
1439 diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1442 ino
= (extno
<< L2INOSPEREXT
) + bitno
;
1444 /* a free inode (bit) was found within this
1445 * extent, so allocate it.
1447 rc
= diAllocBit(imap
, iagp
, ino
);
1448 IREAD_UNLOCK(ipimap
);
1452 /* set the results of the allocation
1453 * and write the iag.
1455 diInitInode(ip
, iagno
, ino
, extno
,
1457 mark_metapage_dirty(mp
);
1459 release_metapage(mp
);
1461 /* free the AG lock and return.
1463 AG_UNLOCK(imap
, agno
);
1470 EXTSPERIAG
- 1) ? 0 : extno
+ 1;
1474 * no free inodes within the extent containing the hint.
1476 * try to allocate from the backed extents following
1477 * hint or, if appropriate (i.e. addext is true), allocate
1478 * an extent of free inodes at or following the extent
1479 * containing the hint.
1481 * the free inode and free extent summary maps are used
1482 * here, so determine the starting summary map position
1483 * and the number of words we'll have to examine. again,
1484 * the approach is to allocate following the hint, so we
1485 * might have to initially ignore prior bits of the summary
1486 * map that represent extents prior to the extent containing
1487 * the hint and later revisit these bits.
1489 bitno
= extno
& (EXTSPERSUM
- 1);
1490 nwords
= (bitno
== 0) ? SMAPSZ
: SMAPSZ
+ 1;
1491 sword
= extno
>> L2EXTSPERSUM
;
1493 /* mask any prior bits for the starting words of the
1496 mask
= ONES
<< (EXTSPERSUM
- bitno
);
1497 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]) | mask
;
1498 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]) | mask
;
1500 /* scan the free inode and free extent summary maps for
1503 for (i
= 0; i
< nwords
; i
++) {
1504 /* check if this word of the free inode summary
1505 * map describes an extent with free inodes.
1508 /* an extent with free inodes has been
1509 * found. determine the extent number
1510 * and the inode number within the extent.
1512 rem
= diFindFree(inosmap
, 0);
1513 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1514 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]),
1516 if (rem
>= INOSPEREXT
) {
1517 IREAD_UNLOCK(ipimap
);
1518 release_metapage(mp
);
1519 AG_UNLOCK(imap
, agno
);
1521 "diAlloc: can't find free bit "
1526 /* determine the inode number within the
1527 * iag and allocate the inode from the
1530 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1531 rc
= diAllocBit(imap
, iagp
, ino
);
1532 IREAD_UNLOCK(ipimap
);
1536 /* set the results of the allocation
1537 * and write the iag.
1539 diInitInode(ip
, iagno
, ino
, extno
,
1541 mark_metapage_dirty(mp
);
1543 release_metapage(mp
);
1545 /* free the AG lock and return.
1547 AG_UNLOCK(imap
, agno
);
1552 /* check if we may allocate an extent of free
1553 * inodes and whether this word of the free
1554 * extents summary map describes a free extent.
1556 if (addext
&& ~extsmap
) {
1557 /* a free extent has been found. determine
1558 * the extent number.
1560 rem
= diFindFree(extsmap
, 0);
1561 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1563 /* allocate an extent of free inodes.
1565 if ((rc
= diNewExt(imap
, iagp
, extno
))) {
1566 /* if there is no disk space for a
1567 * new extent, try to allocate the
1568 * disk inode from somewhere else.
1575 /* set the results of the allocation
1576 * and write the iag.
1578 diInitInode(ip
, iagno
,
1579 extno
<< L2INOSPEREXT
,
1581 mark_metapage_dirty(mp
);
1583 release_metapage(mp
);
1584 /* free the imap inode & the AG lock & return.
1586 IREAD_UNLOCK(ipimap
);
1587 AG_UNLOCK(imap
, agno
);
1591 /* move on to the next set of summary map words.
1593 sword
= (sword
== SMAPSZ
- 1) ? 0 : sword
+ 1;
1594 inosmap
= le32_to_cpu(iagp
->inosmap
[sword
]);
1595 extsmap
= le32_to_cpu(iagp
->extsmap
[sword
]);
1598 /* unlock imap inode */
1599 IREAD_UNLOCK(ipimap
);
1601 /* nothing doing in this iag, so release it. */
1602 release_metapage(mp
);
1606 * try to allocate anywhere within the same AG as the parent inode.
1608 rc
= diAllocAG(imap
, agno
, dir
, ip
);
1610 AG_UNLOCK(imap
, agno
);
1616 * try to allocate in any AG.
1618 return (diAllocAny(imap
, agno
, dir
, ip
));
1623 * NAME: diAllocAG(imap,agno,dir,ip)
1625 * FUNCTION: allocate a disk inode from the allocation group.
1627 * this routine first determines if a new extent of free
1628 * inodes should be added for the allocation group, with
1629 * the current request satisfied from this extent. if this
1630 * is the case, an attempt will be made to do just that. if
1631 * this attempt fails or it has been determined that a new
1632 * extent should not be added, an attempt is made to satisfy
1633 * the request by allocating an existing (backed) free inode
1634 * from the allocation group.
1636 * PRE CONDITION: Already have the AG lock for this AG.
1639 * imap - pointer to inode map control structure.
1640 * agno - allocation group to allocate from.
1641 * dir - 'true' if the new disk inode is for a directory.
1642 * ip - pointer to the new inode to be filled in on successful return
1643 * with the disk inode number allocated, its extent address
1644 * and the start of the ag.
1648 * -ENOSPC - insufficient disk resources.
1652 diAllocAG(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1654 int rc
, addext
, numfree
, numinos
;
1656 /* get the number of free and the number of backed disk
1657 * inodes currently within the ag.
1659 numfree
= imap
->im_agctl
[agno
].numfree
;
1660 numinos
= imap
->im_agctl
[agno
].numinos
;
1662 if (numfree
> numinos
) {
1663 jfs_error(ip
->i_sb
, "diAllocAG: numfree > numinos");
1667 /* determine if we should allocate a new extent of free inodes
1668 * within the ag: for directory inodes, add a new extent
1669 * if there are a small number of free inodes or number of free
1670 * inodes is a small percentage of the number of backed inodes.
1673 addext
= (numfree
< 64 ||
1675 && ((numfree
* 100) / numinos
) <= 20));
1677 addext
= (numfree
== 0);
1680 * try to allocate a new extent of free inodes.
1683 /* if free space is not avaliable for this new extent, try
1684 * below to allocate a free and existing (already backed)
1685 * inode from the ag.
1687 if ((rc
= diAllocExt(imap
, agno
, ip
)) != -ENOSPC
)
1692 * try to allocate an existing free inode from the ag.
1694 return (diAllocIno(imap
, agno
, ip
));
1699 * NAME: diAllocAny(imap,agno,dir,iap)
1701 * FUNCTION: allocate a disk inode from any other allocation group.
1703 * this routine is called when an allocation attempt within
1704 * the primary allocation group has failed. if attempts to
1705 * allocate an inode from any allocation group other than the
1706 * specified primary group.
1709 * imap - pointer to inode map control structure.
1710 * agno - primary allocation group (to avoid).
1711 * dir - 'true' if the new disk inode is for a directory.
1712 * ip - pointer to a new inode to be filled in on successful return
1713 * with the disk inode number allocated, its extent address
1714 * and the start of the ag.
1718 * -ENOSPC - insufficient disk resources.
1722 diAllocAny(struct inomap
* imap
, int agno
, bool dir
, struct inode
*ip
)
1725 int maxag
= JFS_SBI(imap
->im_ipimap
->i_sb
)->bmap
->db_maxag
;
1728 /* try to allocate from the ags following agno up to
1729 * the maximum ag number.
1731 for (ag
= agno
+ 1; ag
<= maxag
; ag
++) {
1734 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1736 AG_UNLOCK(imap
, ag
);
1742 /* try to allocate from the ags in front of agno.
1744 for (ag
= 0; ag
< agno
; ag
++) {
1747 rc
= diAllocAG(imap
, ag
, dir
, ip
);
1749 AG_UNLOCK(imap
, ag
);
1755 /* no free disk inodes.
1762 * NAME: diAllocIno(imap,agno,ip)
1764 * FUNCTION: allocate a disk inode from the allocation group's free
1765 * inode list, returning an error if this free list is
1766 * empty (i.e. no iags on the list).
1768 * allocation occurs from the first iag on the list using
1769 * the iag's free inode summary map to find the leftmost
1770 * free inode in the iag.
1772 * PRE CONDITION: Already have AG lock for this AG.
1775 * imap - pointer to inode map control structure.
1776 * agno - allocation group.
1777 * ip - pointer to new inode to be filled in on successful return
1778 * with the disk inode number allocated, its extent address
1779 * and the start of the ag.
1783 * -ENOSPC - insufficient disk resources.
1786 static int diAllocIno(struct inomap
* imap
, int agno
, struct inode
*ip
)
1788 int iagno
, ino
, rc
, rem
, extno
, sword
;
1789 struct metapage
*mp
;
1792 /* check if there are iags on the ag's free inode list.
1794 if ((iagno
= imap
->im_agctl
[agno
].inofree
) < 0)
1797 /* obtain read lock on imap inode */
1798 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1800 /* read the iag at the head of the list.
1802 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1803 IREAD_UNLOCK(imap
->im_ipimap
);
1806 iagp
= (struct iag
*) mp
->data
;
1808 /* better be free inodes in this iag if it is on the
1811 if (!iagp
->nfreeinos
) {
1812 IREAD_UNLOCK(imap
->im_ipimap
);
1813 release_metapage(mp
);
1815 "diAllocIno: nfreeinos = 0, but iag on freelist");
1819 /* scan the free inode summary map to find an extent
1822 for (sword
= 0;; sword
++) {
1823 if (sword
>= SMAPSZ
) {
1824 IREAD_UNLOCK(imap
->im_ipimap
);
1825 release_metapage(mp
);
1827 "diAllocIno: free inode not found in summary map");
1831 if (~iagp
->inosmap
[sword
])
1835 /* found a extent with free inodes. determine
1836 * the extent number.
1838 rem
= diFindFree(le32_to_cpu(iagp
->inosmap
[sword
]), 0);
1839 if (rem
>= EXTSPERSUM
) {
1840 IREAD_UNLOCK(imap
->im_ipimap
);
1841 release_metapage(mp
);
1842 jfs_error(ip
->i_sb
, "diAllocIno: no free extent found");
1845 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1847 /* find the first free inode in the extent.
1849 rem
= diFindFree(le32_to_cpu(iagp
->wmap
[extno
]), 0);
1850 if (rem
>= INOSPEREXT
) {
1851 IREAD_UNLOCK(imap
->im_ipimap
);
1852 release_metapage(mp
);
1853 jfs_error(ip
->i_sb
, "diAllocIno: free inode not found");
1857 /* compute the inode number within the iag.
1859 ino
= (extno
<< L2INOSPEREXT
) + rem
;
1861 /* allocate the inode.
1863 rc
= diAllocBit(imap
, iagp
, ino
);
1864 IREAD_UNLOCK(imap
->im_ipimap
);
1866 release_metapage(mp
);
1870 /* set the results of the allocation and write the iag.
1872 diInitInode(ip
, iagno
, ino
, extno
, iagp
);
1880 * NAME: diAllocExt(imap,agno,ip)
1882 * FUNCTION: add a new extent of free inodes to an iag, allocating
1883 * an inode from this extent to satisfy the current allocation
1886 * this routine first tries to find an existing iag with free
1887 * extents through the ag free extent list. if list is not
1888 * empty, the head of the list will be selected as the home
1889 * of the new extent of free inodes. otherwise (the list is
1890 * empty), a new iag will be allocated for the ag to contain
1893 * once an iag has been selected, the free extent summary map
1894 * is used to locate a free extent within the iag and diNewExt()
1895 * is called to initialize the extent, with initialization
1896 * including the allocation of the first inode of the extent
1897 * for the purpose of satisfying this request.
1900 * imap - pointer to inode map control structure.
1901 * agno - allocation group number.
1902 * ip - pointer to new inode to be filled in on successful return
1903 * with the disk inode number allocated, its extent address
1904 * and the start of the ag.
1908 * -ENOSPC - insufficient disk resources.
1911 static int diAllocExt(struct inomap
* imap
, int agno
, struct inode
*ip
)
1913 int rem
, iagno
, sword
, extno
, rc
;
1914 struct metapage
*mp
;
1917 /* check if the ag has any iags with free extents. if not,
1918 * allocate a new iag for the ag.
1920 if ((iagno
= imap
->im_agctl
[agno
].extfree
) < 0) {
1921 /* If successful, diNewIAG will obtain the read lock on the
1924 if ((rc
= diNewIAG(imap
, &iagno
, agno
, &mp
))) {
1927 iagp
= (struct iag
*) mp
->data
;
1929 /* set the ag number if this a brand new iag
1932 cpu_to_le64(AGTOBLK(agno
, imap
->im_ipimap
));
1936 IREAD_LOCK(imap
->im_ipimap
, RDWRLOCK_IMAP
);
1937 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
1938 IREAD_UNLOCK(imap
->im_ipimap
);
1939 jfs_error(ip
->i_sb
, "diAllocExt: error reading iag");
1942 iagp
= (struct iag
*) mp
->data
;
1945 /* using the free extent summary map, find a free extent.
1947 for (sword
= 0;; sword
++) {
1948 if (sword
>= SMAPSZ
) {
1949 release_metapage(mp
);
1950 IREAD_UNLOCK(imap
->im_ipimap
);
1952 "diAllocExt: free ext summary map not found");
1955 if (~iagp
->extsmap
[sword
])
1959 /* determine the extent number of the free extent.
1961 rem
= diFindFree(le32_to_cpu(iagp
->extsmap
[sword
]), 0);
1962 if (rem
>= EXTSPERSUM
) {
1963 release_metapage(mp
);
1964 IREAD_UNLOCK(imap
->im_ipimap
);
1965 jfs_error(ip
->i_sb
, "diAllocExt: free extent not found");
1968 extno
= (sword
<< L2EXTSPERSUM
) + rem
;
1970 /* initialize the new extent.
1972 rc
= diNewExt(imap
, iagp
, extno
);
1973 IREAD_UNLOCK(imap
->im_ipimap
);
1975 /* something bad happened. if a new iag was allocated,
1976 * place it back on the inode map's iag free list, and
1977 * clear the ag number information.
1979 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
1981 iagp
->iagfree
= cpu_to_le32(imap
->im_freeiag
);
1982 imap
->im_freeiag
= iagno
;
1983 IAGFREE_UNLOCK(imap
);
1989 /* set the results of the allocation and write the iag.
1991 diInitInode(ip
, iagno
, extno
<< L2INOSPEREXT
, extno
, iagp
);
2000 * NAME: diAllocBit(imap,iagp,ino)
2002 * FUNCTION: allocate a backed inode from an iag.
2004 * this routine performs the mechanics of allocating a
2005 * specified inode from a backed extent.
2007 * if the inode to be allocated represents the last free
2008 * inode within the iag, the iag will be removed from the
2009 * ag free inode list.
2011 * a careful update approach is used to provide consistency
2012 * in the face of updates to multiple buffers. under this
2013 * approach, all required buffers are obtained before making
2014 * any updates and are held all are updates are complete.
2016 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
2017 * this AG. Must have read lock on imap inode.
2020 * imap - pointer to inode map control structure.
2021 * iagp - pointer to iag.
2022 * ino - inode number to be allocated within the iag.
2026 * -ENOSPC - insufficient disk resources.
2029 static int diAllocBit(struct inomap
* imap
, struct iag
* iagp
, int ino
)
2031 int extno
, bitno
, agno
, sword
, rc
;
2032 struct metapage
*amp
= NULL
, *bmp
= NULL
;
2033 struct iag
*aiagp
= NULL
, *biagp
= NULL
;
2036 /* check if this is the last free inode within the iag.
2037 * if so, it will have to be removed from the ag free
2038 * inode list, so get the iags preceeding and following
2041 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2042 if ((int) le32_to_cpu(iagp
->inofreefwd
) >= 0) {
2044 diIAGRead(imap
, le32_to_cpu(iagp
->inofreefwd
),
2047 aiagp
= (struct iag
*) amp
->data
;
2050 if ((int) le32_to_cpu(iagp
->inofreeback
) >= 0) {
2053 le32_to_cpu(iagp
->inofreeback
),
2056 release_metapage(amp
);
2059 biagp
= (struct iag
*) bmp
->data
;
2063 /* get the ag number, extent number, inode number within
2066 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), JFS_SBI(imap
->im_ipimap
->i_sb
));
2067 extno
= ino
>> L2INOSPEREXT
;
2068 bitno
= ino
& (INOSPEREXT
- 1);
2070 /* compute the mask for setting the map.
2072 mask
= HIGHORDER
>> bitno
;
2074 /* the inode should be free and backed.
2076 if (((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) ||
2077 ((le32_to_cpu(iagp
->wmap
[extno
]) & mask
) != 0) ||
2078 (addressPXD(&iagp
->inoext
[extno
]) == 0)) {
2080 release_metapage(amp
);
2082 release_metapage(bmp
);
2084 jfs_error(imap
->im_ipimap
->i_sb
,
2085 "diAllocBit: iag inconsistent");
2089 /* mark the inode as allocated in the working map.
2091 iagp
->wmap
[extno
] |= cpu_to_le32(mask
);
2093 /* check if all inodes within the extent are now
2094 * allocated. if so, update the free inode summary
2095 * map to reflect this.
2097 if (iagp
->wmap
[extno
] == cpu_to_le32(ONES
)) {
2098 sword
= extno
>> L2EXTSPERSUM
;
2099 bitno
= extno
& (EXTSPERSUM
- 1);
2100 iagp
->inosmap
[sword
] |= cpu_to_le32(HIGHORDER
>> bitno
);
2103 /* if this was the last free inode in the iag, remove the
2104 * iag from the ag free inode list.
2106 if (iagp
->nfreeinos
== cpu_to_le32(1)) {
2108 aiagp
->inofreeback
= iagp
->inofreeback
;
2109 write_metapage(amp
);
2113 biagp
->inofreefwd
= iagp
->inofreefwd
;
2114 write_metapage(bmp
);
2116 imap
->im_agctl
[agno
].inofree
=
2117 le32_to_cpu(iagp
->inofreefwd
);
2119 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2122 /* update the free inode count at the iag, ag, inode
2125 le32_add_cpu(&iagp
->nfreeinos
, -1);
2126 imap
->im_agctl
[agno
].numfree
-= 1;
2127 atomic_dec(&imap
->im_numfree
);
2134 * NAME: diNewExt(imap,iagp,extno)
2136 * FUNCTION: initialize a new extent of inodes for an iag, allocating
2137 * the first inode of the extent for use for the current
2138 * allocation request.
2140 * disk resources are allocated for the new extent of inodes
2141 * and the inodes themselves are initialized to reflect their
2142 * existence within the extent (i.e. their inode numbers and
2143 * inode extent addresses are set) and their initial state
2144 * (mode and link count are set to zero).
2146 * if the iag is new, it is not yet on an ag extent free list
2147 * but will now be placed on this list.
2149 * if the allocation of the new extent causes the iag to
2150 * have no free extent, the iag will be removed from the
2151 * ag extent free list.
2153 * if the iag has no free backed inodes, it will be placed
2154 * on the ag free inode list, since the addition of the new
2155 * extent will now cause it to have free inodes.
2157 * a careful update approach is used to provide consistency
2158 * (i.e. list consistency) in the face of updates to multiple
2159 * buffers. under this approach, all required buffers are
2160 * obtained before making any updates and are held until all
2161 * updates are complete.
2163 * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
2164 * this AG. Must have read lock on imap inode.
2167 * imap - pointer to inode map control structure.
2168 * iagp - pointer to iag.
2169 * extno - extent number.
2173 * -ENOSPC - insufficient disk resources.
2176 static int diNewExt(struct inomap
* imap
, struct iag
* iagp
, int extno
)
2178 int agno
, iagno
, fwd
, back
, freei
= 0, sword
, rc
;
2179 struct iag
*aiagp
= NULL
, *biagp
= NULL
, *ciagp
= NULL
;
2180 struct metapage
*amp
, *bmp
, *cmp
, *dmp
;
2181 struct inode
*ipimap
;
2187 struct jfs_sb_info
*sbi
;
2189 /* better have free extents.
2191 if (!iagp
->nfreeexts
) {
2192 jfs_error(imap
->im_ipimap
->i_sb
, "diNewExt: no free extents");
2196 /* get the inode map inode.
2198 ipimap
= imap
->im_ipimap
;
2199 sbi
= JFS_SBI(ipimap
->i_sb
);
2201 amp
= bmp
= cmp
= NULL
;
2203 /* get the ag and iag numbers for this iag.
2205 agno
= BLKTOAG(le64_to_cpu(iagp
->agstart
), sbi
);
2206 iagno
= le32_to_cpu(iagp
->iagnum
);
2208 /* check if this is the last free extent within the
2209 * iag. if so, the iag must be removed from the ag
2210 * free extent list, so get the iags preceeding and
2211 * following the iag on this list.
2213 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2214 if ((fwd
= le32_to_cpu(iagp
->extfreefwd
)) >= 0) {
2215 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2217 aiagp
= (struct iag
*) amp
->data
;
2220 if ((back
= le32_to_cpu(iagp
->extfreeback
)) >= 0) {
2221 if ((rc
= diIAGRead(imap
, back
, &bmp
)))
2223 biagp
= (struct iag
*) bmp
->data
;
2226 /* the iag has free extents. if all extents are free
2227 * (as is the case for a newly allocated iag), the iag
2228 * must be added to the ag free extent list, so get
2229 * the iag at the head of the list in preparation for
2230 * adding this iag to this list.
2233 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2234 if ((fwd
= imap
->im_agctl
[agno
].extfree
) >= 0) {
2235 if ((rc
= diIAGRead(imap
, fwd
, &
)))
2237 aiagp
= (struct iag
*) amp
->data
;
2242 /* check if the iag has no free inodes. if so, the iag
2243 * will have to be added to the ag free inode list, so get
2244 * the iag at the head of the list in preparation for
2245 * adding this iag to this list. in doing this, we must
2246 * check if we already have the iag at the head of
2249 if (iagp
->nfreeinos
== 0) {
2250 freei
= imap
->im_agctl
[agno
].inofree
;
2255 } else if (freei
== back
) {
2258 if ((rc
= diIAGRead(imap
, freei
, &cmp
)))
2260 ciagp
= (struct iag
*) cmp
->data
;
2262 if (ciagp
== NULL
) {
2263 jfs_error(imap
->im_ipimap
->i_sb
,
2264 "diNewExt: ciagp == NULL");
2271 /* allocate disk space for the inode extent.
2273 if ((extno
== 0) || (addressPXD(&iagp
->inoext
[extno
- 1]) == 0))
2274 hint
= ((s64
) agno
<< sbi
->bmap
->db_agl2size
) - 1;
2276 hint
= addressPXD(&iagp
->inoext
[extno
- 1]) +
2277 lengthPXD(&iagp
->inoext
[extno
- 1]) - 1;
2279 if ((rc
= dbAlloc(ipimap
, hint
, (s64
) imap
->im_nbperiext
, &blkno
)))
2282 /* compute the inode number of the first inode within the
2285 ino
= (iagno
<< L2INOSPERIAG
) + (extno
<< L2INOSPEREXT
);
2287 /* initialize the inodes within the newly allocated extent a
2290 for (i
= 0; i
< imap
->im_nbperiext
; i
+= sbi
->nbperpage
) {
2291 /* get a buffer for this page of disk inodes.
2293 dmp
= get_metapage(ipimap
, blkno
+ i
, PSIZE
, 1);
2298 dp
= (struct dinode
*) dmp
->data
;
2300 /* initialize the inode number, mode, link count and
2301 * inode extent address.
2303 for (j
= 0; j
< INOSPERPAGE
; j
++, dp
++, ino
++) {
2304 dp
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
2305 dp
->di_number
= cpu_to_le32(ino
);
2306 dp
->di_fileset
= cpu_to_le32(FILESYSTEM_I
);
2309 PXDaddress(&(dp
->di_ixpxd
), blkno
);
2310 PXDlength(&(dp
->di_ixpxd
), imap
->im_nbperiext
);
2312 write_metapage(dmp
);
2315 /* if this is the last free extent within the iag, remove the
2316 * iag from the ag free extent list.
2318 if (iagp
->nfreeexts
== cpu_to_le32(1)) {
2320 aiagp
->extfreeback
= iagp
->extfreeback
;
2323 biagp
->extfreefwd
= iagp
->extfreefwd
;
2325 imap
->im_agctl
[agno
].extfree
=
2326 le32_to_cpu(iagp
->extfreefwd
);
2328 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2330 /* if the iag has all free extents (newly allocated iag),
2331 * add the iag to the ag free extent list.
2333 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2335 aiagp
->extfreeback
= cpu_to_le32(iagno
);
2337 iagp
->extfreefwd
= cpu_to_le32(fwd
);
2338 iagp
->extfreeback
= cpu_to_le32(-1);
2339 imap
->im_agctl
[agno
].extfree
= iagno
;
2343 /* if the iag has no free inodes, add the iag to the
2344 * ag free inode list.
2346 if (iagp
->nfreeinos
== 0) {
2348 ciagp
->inofreeback
= cpu_to_le32(iagno
);
2351 cpu_to_le32(imap
->im_agctl
[agno
].inofree
);
2352 iagp
->inofreeback
= cpu_to_le32(-1);
2353 imap
->im_agctl
[agno
].inofree
= iagno
;
2356 /* initialize the extent descriptor of the extent. */
2357 PXDlength(&iagp
->inoext
[extno
], imap
->im_nbperiext
);
2358 PXDaddress(&iagp
->inoext
[extno
], blkno
);
2360 /* initialize the working and persistent map of the extent.
2361 * the working map will be initialized such that
2362 * it indicates the first inode of the extent is allocated.
2364 iagp
->wmap
[extno
] = cpu_to_le32(HIGHORDER
);
2365 iagp
->pmap
[extno
] = 0;
2367 /* update the free inode and free extent summary maps
2368 * for the extent to indicate the extent has free inodes
2369 * and no longer represents a free extent.
2371 sword
= extno
>> L2EXTSPERSUM
;
2372 mask
= HIGHORDER
>> (extno
& (EXTSPERSUM
- 1));
2373 iagp
->extsmap
[sword
] |= cpu_to_le32(mask
);
2374 iagp
->inosmap
[sword
] &= cpu_to_le32(~mask
);
2376 /* update the free inode and free extent counts for the
2379 le32_add_cpu(&iagp
->nfreeinos
, (INOSPEREXT
- 1));
2380 le32_add_cpu(&iagp
->nfreeexts
, -1);
2382 /* update the free and backed inode counts for the ag.
2384 imap
->im_agctl
[agno
].numfree
+= (INOSPEREXT
- 1);
2385 imap
->im_agctl
[agno
].numinos
+= INOSPEREXT
;
2387 /* update the free and backed inode counts for the inode map.
2389 atomic_add(INOSPEREXT
- 1, &imap
->im_numfree
);
2390 atomic_add(INOSPEREXT
, &imap
->im_numinos
);
2395 write_metapage(amp
);
2397 write_metapage(bmp
);
2399 write_metapage(cmp
);
2405 /* release the iags.
2408 release_metapage(amp
);
2410 release_metapage(bmp
);
2412 release_metapage(cmp
);
2419 * NAME: diNewIAG(imap,iagnop,agno)
2421 * FUNCTION: allocate a new iag for an allocation group.
2423 * first tries to allocate the iag from the inode map
2425 * if the list has free iags, the head of the list is removed
2426 * and returned to satisfy the request.
2427 * if the inode map's iag free list is empty, the inode map
2428 * is extended to hold a new iag. this new iag is initialized
2429 * and returned to satisfy the request.
2432 * imap - pointer to inode map control structure.
2433 * iagnop - pointer to an iag number set with the number of the
2434 * newly allocated iag upon successful return.
2435 * agno - allocation group number.
2436 * bpp - Buffer pointer to be filled in with new IAG's buffer
2440 * -ENOSPC - insufficient disk resources.
2444 * AG lock held on entry/exit;
2445 * write lock on the map is held inside;
2446 * read lock on the map is held on successful completion;
2448 * note: new iag transaction:
2449 * . synchronously write iag;
2450 * . write log of xtree and inode of imap;
2452 * . synchronous write of xtree (right to left, bottom to top);
2453 * . at start of logredo(): init in-memory imap with one additional iag page;
2454 * . at end of logredo(): re-read imap inode to determine
2458 diNewIAG(struct inomap
* imap
, int *iagnop
, int agno
, struct metapage
** mpp
)
2462 struct inode
*ipimap
;
2463 struct super_block
*sb
;
2464 struct jfs_sb_info
*sbi
;
2465 struct metapage
*mp
;
2470 struct inode
*iplist
[1];
2472 /* pick up pointers to the inode map and mount inodes */
2473 ipimap
= imap
->im_ipimap
;
2477 /* acquire the free iag lock */
2480 /* if there are any iags on the inode map free iag list,
2481 * allocate the iag from the head of the list.
2483 if (imap
->im_freeiag
>= 0) {
2484 /* pick up the iag number at the head of the list */
2485 iagno
= imap
->im_freeiag
;
2487 /* determine the logical block number of the iag */
2488 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2490 /* no free iags. the inode map will have to be extented
2491 * to include a new iag.
2494 /* acquire inode map lock */
2495 IWRITE_LOCK(ipimap
, RDWRLOCK_IMAP
);
2497 if (ipimap
->i_size
>> L2PSIZE
!= imap
->im_nextiag
+ 1) {
2498 IWRITE_UNLOCK(ipimap
);
2499 IAGFREE_UNLOCK(imap
);
2500 jfs_error(imap
->im_ipimap
->i_sb
,
2501 "diNewIAG: ipimap->i_size is wrong");
2506 /* get the next avaliable iag number */
2507 iagno
= imap
->im_nextiag
;
2509 /* make sure that we have not exceeded the maximum inode
2512 if (iagno
> (MAXIAGS
- 1)) {
2513 /* release the inode map lock */
2514 IWRITE_UNLOCK(ipimap
);
2521 * synchronously append new iag page.
2523 /* determine the logical address of iag page to append */
2524 blkno
= IAGTOLBLK(iagno
, sbi
->l2nbperpage
);
2526 /* Allocate extent for new iag page */
2527 xlen
= sbi
->nbperpage
;
2528 if ((rc
= dbAlloc(ipimap
, 0, (s64
) xlen
, &xaddr
))) {
2529 /* release the inode map lock */
2530 IWRITE_UNLOCK(ipimap
);
2536 * start transaction of update of the inode map
2537 * addressing structure pointing to the new iag page;
2539 tid
= txBegin(sb
, COMMIT_FORCE
);
2540 mutex_lock(&JFS_IP(ipimap
)->commit_mutex
);
2542 /* update the inode map addressing structure to point to it */
2544 xtInsert(tid
, ipimap
, 0, blkno
, xlen
, &xaddr
, 0))) {
2546 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2547 /* Free the blocks allocated for the iag since it was
2548 * not successfully added to the inode map
2550 dbFree(ipimap
, xaddr
, (s64
) xlen
);
2552 /* release the inode map lock */
2553 IWRITE_UNLOCK(ipimap
);
2558 /* update the inode map's inode to reflect the extension */
2559 ipimap
->i_size
+= PSIZE
;
2560 inode_add_bytes(ipimap
, PSIZE
);
2562 /* assign a buffer for the page */
2563 mp
= get_metapage(ipimap
, blkno
, PSIZE
, 0);
2566 * This is very unlikely since we just created the
2567 * extent, but let's try to handle it correctly
2569 xtTruncate(tid
, ipimap
, ipimap
->i_size
- PSIZE
,
2574 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2576 /* release the inode map lock */
2577 IWRITE_UNLOCK(ipimap
);
2582 iagp
= (struct iag
*) mp
->data
;
2585 memset(iagp
, 0, sizeof(struct iag
));
2586 iagp
->iagnum
= cpu_to_le32(iagno
);
2587 iagp
->inofreefwd
= iagp
->inofreeback
= cpu_to_le32(-1);
2588 iagp
->extfreefwd
= iagp
->extfreeback
= cpu_to_le32(-1);
2589 iagp
->iagfree
= cpu_to_le32(-1);
2590 iagp
->nfreeinos
= 0;
2591 iagp
->nfreeexts
= cpu_to_le32(EXTSPERIAG
);
2593 /* initialize the free inode summary map (free extent
2594 * summary map initialization handled by bzero).
2596 for (i
= 0; i
< SMAPSZ
; i
++)
2597 iagp
->inosmap
[i
] = cpu_to_le32(ONES
);
2600 * Write and sync the metapage
2605 * txCommit(COMMIT_FORCE) will synchronously write address
2606 * index pages and inode after commit in careful update order
2607 * of address index pages (right to left, bottom up);
2610 rc
= txCommit(tid
, 1, &iplist
[0], COMMIT_FORCE
);
2613 mutex_unlock(&JFS_IP(ipimap
)->commit_mutex
);
2615 duplicateIXtree(sb
, blkno
, xlen
, &xaddr
);
2617 /* update the next avaliable iag number */
2618 imap
->im_nextiag
+= 1;
2620 /* Add the iag to the iag free list so we don't lose the iag
2621 * if a failure happens now.
2623 imap
->im_freeiag
= iagno
;
2625 /* Until we have logredo working, we want the imap inode &
2626 * control page to be up to date.
2630 /* release the inode map lock */
2631 IWRITE_UNLOCK(ipimap
);
2634 /* obtain read lock on map */
2635 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2638 if ((rc
= diIAGRead(imap
, iagno
, &mp
))) {
2639 IREAD_UNLOCK(ipimap
);
2643 iagp
= (struct iag
*) mp
->data
;
2645 /* remove the iag from the iag free list */
2646 imap
->im_freeiag
= le32_to_cpu(iagp
->iagfree
);
2647 iagp
->iagfree
= cpu_to_le32(-1);
2649 /* set the return iag number and buffer pointer */
2654 /* release the iag free lock */
2655 IAGFREE_UNLOCK(imap
);
2663 * FUNCTION: get the buffer for the specified iag within a fileset
2664 * or aggregate inode map.
2667 * imap - pointer to inode map control structure.
2668 * iagno - iag number.
2669 * bpp - point to buffer pointer to be filled in on successful
2673 * must have read lock on imap inode
2674 * (When called by diExtendFS, the filesystem is quiesced, therefore
2675 * the read lock is unnecessary.)
2681 static int diIAGRead(struct inomap
* imap
, int iagno
, struct metapage
** mpp
)
2683 struct inode
*ipimap
= imap
->im_ipimap
;
2686 /* compute the logical block number of the iag. */
2687 blkno
= IAGTOLBLK(iagno
, JFS_SBI(ipimap
->i_sb
)->l2nbperpage
);
2690 *mpp
= read_metapage(ipimap
, blkno
, PSIZE
, 0);
2699 * NAME: diFindFree()
2701 * FUNCTION: find the first free bit in a word starting at
2702 * the specified bit position.
2705 * word - word to be examined.
2706 * start - starting bit position.
2709 * bit position of first free bit in the word or 32 if
2710 * no free bits were found.
2712 static int diFindFree(u32 word
, int start
)
2716 /* scan the word for the first free bit. */
2717 for (word
<<= start
, bitno
= start
; bitno
< 32;
2718 bitno
++, word
<<= 1) {
2719 if ((word
& HIGHORDER
) == 0)
2726 * NAME: diUpdatePMap()
2728 * FUNCTION: Update the persistent map in an IAG for the allocation or
2729 * freeing of the specified inode.
2731 * PRE CONDITIONS: Working map has already been updated for allocate.
2734 * ipimap - Incore inode map inode
2735 * inum - Number of inode to mark in permanent map
2736 * is_free - If 'true' indicates inode should be marked freed, otherwise
2737 * indicates inode should be marked allocated.
2743 diUpdatePMap(struct inode
*ipimap
,
2744 unsigned long inum
, bool is_free
, struct tblock
* tblk
)
2748 struct metapage
*mp
;
2749 int iagno
, ino
, extno
, bitno
;
2750 struct inomap
*imap
;
2752 struct jfs_log
*log
;
2753 int lsn
, difft
, diffp
;
2754 unsigned long flags
;
2756 imap
= JFS_IP(ipimap
)->i_imap
;
2757 /* get the iag number containing the inode */
2758 iagno
= INOTOIAG(inum
);
2759 /* make sure that the iag is contained within the map */
2760 if (iagno
>= imap
->im_nextiag
) {
2761 jfs_error(ipimap
->i_sb
,
2762 "diUpdatePMap: the iag is outside the map");
2766 IREAD_LOCK(ipimap
, RDWRLOCK_IMAP
);
2767 rc
= diIAGRead(imap
, iagno
, &mp
);
2768 IREAD_UNLOCK(ipimap
);
2771 metapage_wait_for_io(mp
);
2772 iagp
= (struct iag
*) mp
->data
;
2773 /* get the inode number and extent number of the inode within
2774 * the iag and the inode number within the extent.
2776 ino
= inum
& (INOSPERIAG
- 1);
2777 extno
= ino
>> L2INOSPEREXT
;
2778 bitno
= ino
& (INOSPEREXT
- 1);
2779 mask
= HIGHORDER
>> bitno
;
2781 * mark the inode free in persistent map:
2784 /* The inode should have been allocated both in working
2785 * map and in persistent map;
2786 * the inode will be freed from working map at the release
2787 * of last reference release;
2789 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2790 jfs_error(ipimap
->i_sb
,
2791 "diUpdatePMap: inode %ld not marked as "
2792 "allocated in wmap!", inum
);
2794 if (!(le32_to_cpu(iagp
->pmap
[extno
]) & mask
)) {
2795 jfs_error(ipimap
->i_sb
,
2796 "diUpdatePMap: inode %ld not marked as "
2797 "allocated in pmap!", inum
);
2799 /* update the bitmap for the extent of the freed inode */
2800 iagp
->pmap
[extno
] &= cpu_to_le32(~mask
);
2803 * mark the inode allocated in persistent map:
2806 /* The inode should be already allocated in the working map
2807 * and should be free in persistent map;
2809 if (!(le32_to_cpu(iagp
->wmap
[extno
]) & mask
)) {
2810 release_metapage(mp
);
2811 jfs_error(ipimap
->i_sb
,
2812 "diUpdatePMap: the inode is not allocated in "
2816 if ((le32_to_cpu(iagp
->pmap
[extno
]) & mask
) != 0) {
2817 release_metapage(mp
);
2818 jfs_error(ipimap
->i_sb
,
2819 "diUpdatePMap: the inode is not free in the "
2823 /* update the bitmap for the extent of the allocated inode */
2824 iagp
->pmap
[extno
] |= cpu_to_le32(mask
);
2830 log
= JFS_SBI(tblk
->sb
)->log
;
2831 LOGSYNC_LOCK(log
, flags
);
2833 /* inherit older/smaller lsn */
2834 logdiff(difft
, lsn
, log
);
2835 logdiff(diffp
, mp
->lsn
, log
);
2836 if (difft
< diffp
) {
2838 /* move mp after tblock in logsync list */
2839 list_move(&mp
->synclist
, &tblk
->synclist
);
2841 /* inherit younger/larger clsn */
2843 logdiff(difft
, tblk
->clsn
, log
);
2844 logdiff(diffp
, mp
->clsn
, log
);
2846 mp
->clsn
= tblk
->clsn
;
2850 /* insert mp after tblock in logsync list */
2852 list_add(&mp
->synclist
, &tblk
->synclist
);
2853 mp
->clsn
= tblk
->clsn
;
2855 LOGSYNC_UNLOCK(log
, flags
);
2863 * function: update imap for extendfs();
2865 * note: AG size has been increased s.t. each k old contiguous AGs are
2866 * coalesced into a new AG;
2868 int diExtendFS(struct inode
*ipimap
, struct inode
*ipbmap
)
2871 struct inomap
*imap
= JFS_IP(ipimap
)->i_imap
;
2872 struct iag
*iagp
= NULL
, *hiagp
= NULL
;
2873 struct bmap
*mp
= JFS_SBI(ipbmap
->i_sb
)->bmap
;
2874 struct metapage
*bp
, *hbp
;
2876 int numinos
, xnuminos
= 0, xnumfree
= 0;
2879 jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d",
2880 imap
->im_nextiag
, atomic_read(&imap
->im_numinos
),
2881 atomic_read(&imap
->im_numfree
));
2886 * coalesce contiguous k (newAGSize/oldAGSize) AGs;
2887 * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn;
2888 * note: new AG size = old AG size * (2**x).
2891 /* init per AG control information im_agctl[] */
2892 for (i
= 0; i
< MAXAG
; i
++) {
2893 imap
->im_agctl
[i
].inofree
= -1;
2894 imap
->im_agctl
[i
].extfree
= -1;
2895 imap
->im_agctl
[i
].numinos
= 0; /* number of backed inodes */
2896 imap
->im_agctl
[i
].numfree
= 0; /* number of free backed inodes */
2900 * process each iag page of the map.
2902 * rebuild AG Free Inode List, AG Free Inode Extent List;
2904 for (i
= 0; i
< imap
->im_nextiag
; i
++) {
2905 if ((rc
= diIAGRead(imap
, i
, &bp
))) {
2909 iagp
= (struct iag
*) bp
->data
;
2910 if (le32_to_cpu(iagp
->iagnum
) != i
) {
2911 release_metapage(bp
);
2912 jfs_error(ipimap
->i_sb
,
2913 "diExtendFs: unexpected value of iagnum");
2917 /* leave free iag in the free iag list */
2918 if (iagp
->nfreeexts
== cpu_to_le32(EXTSPERIAG
)) {
2919 release_metapage(bp
);
2923 /* agstart that computes to the same ag is treated as same; */
2924 agstart
= le64_to_cpu(iagp
->agstart
);
2925 /* iagp->agstart = agstart & ~(mp->db_agsize - 1); */
2926 n
= agstart
>> mp
->db_agl2size
;
2928 /* compute backed inodes */
2929 numinos
= (EXTSPERIAG
- le32_to_cpu(iagp
->nfreeexts
))
2932 /* merge AG backed inodes */
2933 imap
->im_agctl
[n
].numinos
+= numinos
;
2934 xnuminos
+= numinos
;
2937 /* if any backed free inodes, insert at AG free inode list */
2938 if ((int) le32_to_cpu(iagp
->nfreeinos
) > 0) {
2939 if ((head
= imap
->im_agctl
[n
].inofree
) == -1) {
2940 iagp
->inofreefwd
= cpu_to_le32(-1);
2941 iagp
->inofreeback
= cpu_to_le32(-1);
2943 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2947 hiagp
= (struct iag
*) hbp
->data
;
2948 hiagp
->inofreeback
= iagp
->iagnum
;
2949 iagp
->inofreefwd
= cpu_to_le32(head
);
2950 iagp
->inofreeback
= cpu_to_le32(-1);
2951 write_metapage(hbp
);
2954 imap
->im_agctl
[n
].inofree
=
2955 le32_to_cpu(iagp
->iagnum
);
2957 /* merge AG backed free inodes */
2958 imap
->im_agctl
[n
].numfree
+=
2959 le32_to_cpu(iagp
->nfreeinos
);
2960 xnumfree
+= le32_to_cpu(iagp
->nfreeinos
);
2963 /* if any free extents, insert at AG free extent list */
2964 if (le32_to_cpu(iagp
->nfreeexts
) > 0) {
2965 if ((head
= imap
->im_agctl
[n
].extfree
) == -1) {
2966 iagp
->extfreefwd
= cpu_to_le32(-1);
2967 iagp
->extfreeback
= cpu_to_le32(-1);
2969 if ((rc
= diIAGRead(imap
, head
, &hbp
))) {
2973 hiagp
= (struct iag
*) hbp
->data
;
2974 hiagp
->extfreeback
= iagp
->iagnum
;
2975 iagp
->extfreefwd
= cpu_to_le32(head
);
2976 iagp
->extfreeback
= cpu_to_le32(-1);
2977 write_metapage(hbp
);
2980 imap
->im_agctl
[n
].extfree
=
2981 le32_to_cpu(iagp
->iagnum
);
2988 if (xnuminos
!= atomic_read(&imap
->im_numinos
) ||
2989 xnumfree
!= atomic_read(&imap
->im_numfree
)) {
2990 jfs_error(ipimap
->i_sb
,
2991 "diExtendFs: numinos or numfree incorrect");
3002 * serialization: IWRITE_LOCK held on entry/exit
3004 * note: shadow page with regular inode (rel.2);
3006 static void duplicateIXtree(struct super_block
*sb
, s64 blkno
,
3007 int xlen
, s64
*xaddr
)
3009 struct jfs_superblock
*j_sb
;
3010 struct buffer_head
*bh
;
3014 /* if AIT2 ipmap2 is bad, do not try to update it */
3015 if (JFS_SBI(sb
)->mntflag
& JFS_BAD_SAIT
) /* s_flag */
3017 ip
= diReadSpecial(sb
, FILESYSTEM_I
, 1);
3019 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
3020 if (readSuper(sb
, &bh
))
3022 j_sb
= (struct jfs_superblock
*)bh
->b_data
;
3023 j_sb
->s_flag
|= cpu_to_le32(JFS_BAD_SAIT
);
3025 mark_buffer_dirty(bh
);
3026 sync_dirty_buffer(bh
);
3031 /* start transaction */
3032 tid
= txBegin(sb
, COMMIT_FORCE
);
3033 /* update the inode map addressing structure to point to it */
3034 if (xtInsert(tid
, ip
, 0, blkno
, xlen
, xaddr
, 0)) {
3035 JFS_SBI(sb
)->mntflag
|= JFS_BAD_SAIT
;
3040 /* update the inode map's inode to reflect the extension */
3041 ip
->i_size
+= PSIZE
;
3042 inode_add_bytes(ip
, PSIZE
);
3043 txCommit(tid
, 1, &ip
, COMMIT_FORCE
);
3050 * NAME: copy_from_dinode()
3052 * FUNCTION: Copies inode info from disk inode to in-memory inode
3056 * -ENOMEM - insufficient memory
3058 static int copy_from_dinode(struct dinode
* dip
, struct inode
*ip
)
3060 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3061 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3063 jfs_ip
->fileset
= le32_to_cpu(dip
->di_fileset
);
3064 jfs_ip
->mode2
= le32_to_cpu(dip
->di_mode
);
3065 jfs_set_inode_flags(ip
);
3067 ip
->i_mode
= le32_to_cpu(dip
->di_mode
) & 0xffff;
3068 if (sbi
->umask
!= -1) {
3069 ip
->i_mode
= (ip
->i_mode
& ~0777) | (0777 & ~sbi
->umask
);
3070 /* For directories, add x permission if r is allowed by umask */
3071 if (S_ISDIR(ip
->i_mode
)) {
3072 if (ip
->i_mode
& 0400)
3074 if (ip
->i_mode
& 0040)
3076 if (ip
->i_mode
& 0004)
3080 ip
->i_nlink
= le32_to_cpu(dip
->di_nlink
);
3082 jfs_ip
->saved_uid
= le32_to_cpu(dip
->di_uid
);
3084 ip
->i_uid
= jfs_ip
->saved_uid
;
3086 ip
->i_uid
= sbi
->uid
;
3089 jfs_ip
->saved_gid
= le32_to_cpu(dip
->di_gid
);
3091 ip
->i_gid
= jfs_ip
->saved_gid
;
3093 ip
->i_gid
= sbi
->gid
;
3096 ip
->i_size
= le64_to_cpu(dip
->di_size
);
3097 ip
->i_atime
.tv_sec
= le32_to_cpu(dip
->di_atime
.tv_sec
);
3098 ip
->i_atime
.tv_nsec
= le32_to_cpu(dip
->di_atime
.tv_nsec
);
3099 ip
->i_mtime
.tv_sec
= le32_to_cpu(dip
->di_mtime
.tv_sec
);
3100 ip
->i_mtime
.tv_nsec
= le32_to_cpu(dip
->di_mtime
.tv_nsec
);
3101 ip
->i_ctime
.tv_sec
= le32_to_cpu(dip
->di_ctime
.tv_sec
);
3102 ip
->i_ctime
.tv_nsec
= le32_to_cpu(dip
->di_ctime
.tv_nsec
);
3103 ip
->i_blocks
= LBLK2PBLK(ip
->i_sb
, le64_to_cpu(dip
->di_nblocks
));
3104 ip
->i_generation
= le32_to_cpu(dip
->di_gen
);
3106 jfs_ip
->ixpxd
= dip
->di_ixpxd
; /* in-memory pxd's are little-endian */
3107 jfs_ip
->acl
= dip
->di_acl
; /* as are dxd's */
3108 jfs_ip
->ea
= dip
->di_ea
;
3109 jfs_ip
->next_index
= le32_to_cpu(dip
->di_next_index
);
3110 jfs_ip
->otime
= le32_to_cpu(dip
->di_otime
.tv_sec
);
3111 jfs_ip
->acltype
= le32_to_cpu(dip
->di_acltype
);
3113 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
)) {
3114 jfs_ip
->dev
= le32_to_cpu(dip
->di_rdev
);
3115 ip
->i_rdev
= new_decode_dev(jfs_ip
->dev
);
3118 if (S_ISDIR(ip
->i_mode
)) {
3119 memcpy(&jfs_ip
->i_dirtable
, &dip
->di_dirtable
, 384);
3120 } else if (S_ISREG(ip
->i_mode
) || S_ISLNK(ip
->i_mode
)) {
3121 memcpy(&jfs_ip
->i_xtroot
, &dip
->di_xtroot
, 288);
3123 memcpy(&jfs_ip
->i_inline_ea
, &dip
->di_inlineea
, 128);
3125 /* Zero the in-memory-only stuff */
3127 jfs_ip
->btindex
= 0;
3128 jfs_ip
->btorder
= 0;
3131 jfs_ip
->atlhead
= 0;
3132 jfs_ip
->atltail
= 0;
3138 * NAME: copy_to_dinode()
3140 * FUNCTION: Copies inode info from in-memory inode to disk inode
3142 static void copy_to_dinode(struct dinode
* dip
, struct inode
*ip
)
3144 struct jfs_inode_info
*jfs_ip
= JFS_IP(ip
);
3145 struct jfs_sb_info
*sbi
= JFS_SBI(ip
->i_sb
);
3147 dip
->di_fileset
= cpu_to_le32(jfs_ip
->fileset
);
3148 dip
->di_inostamp
= cpu_to_le32(sbi
->inostamp
);
3149 dip
->di_number
= cpu_to_le32(ip
->i_ino
);
3150 dip
->di_gen
= cpu_to_le32(ip
->i_generation
);
3151 dip
->di_size
= cpu_to_le64(ip
->i_size
);
3152 dip
->di_nblocks
= cpu_to_le64(PBLK2LBLK(ip
->i_sb
, ip
->i_blocks
));
3153 dip
->di_nlink
= cpu_to_le32(ip
->i_nlink
);
3155 dip
->di_uid
= cpu_to_le32(ip
->i_uid
);
3157 dip
->di_uid
= cpu_to_le32(jfs_ip
->saved_uid
);
3159 dip
->di_gid
= cpu_to_le32(ip
->i_gid
);
3161 dip
->di_gid
= cpu_to_le32(jfs_ip
->saved_gid
);
3162 jfs_get_inode_flags(jfs_ip
);
3164 * mode2 is only needed for storing the higher order bits.
3165 * Trust i_mode for the lower order ones
3167 if (sbi
->umask
== -1)
3168 dip
->di_mode
= cpu_to_le32((jfs_ip
->mode2
& 0xffff0000) |
3170 else /* Leave the original permissions alone */
3171 dip
->di_mode
= cpu_to_le32(jfs_ip
->mode2
);
3173 dip
->di_atime
.tv_sec
= cpu_to_le32(ip
->i_atime
.tv_sec
);
3174 dip
->di_atime
.tv_nsec
= cpu_to_le32(ip
->i_atime
.tv_nsec
);
3175 dip
->di_ctime
.tv_sec
= cpu_to_le32(ip
->i_ctime
.tv_sec
);
3176 dip
->di_ctime
.tv_nsec
= cpu_to_le32(ip
->i_ctime
.tv_nsec
);
3177 dip
->di_mtime
.tv_sec
= cpu_to_le32(ip
->i_mtime
.tv_sec
);
3178 dip
->di_mtime
.tv_nsec
= cpu_to_le32(ip
->i_mtime
.tv_nsec
);
3179 dip
->di_ixpxd
= jfs_ip
->ixpxd
; /* in-memory pxd's are little-endian */
3180 dip
->di_acl
= jfs_ip
->acl
; /* as are dxd's */
3181 dip
->di_ea
= jfs_ip
->ea
;
3182 dip
->di_next_index
= cpu_to_le32(jfs_ip
->next_index
);
3183 dip
->di_otime
.tv_sec
= cpu_to_le32(jfs_ip
->otime
);
3184 dip
->di_otime
.tv_nsec
= 0;
3185 dip
->di_acltype
= cpu_to_le32(jfs_ip
->acltype
);
3186 if (S_ISCHR(ip
->i_mode
) || S_ISBLK(ip
->i_mode
))
3187 dip
->di_rdev
= cpu_to_le32(jfs_ip
->dev
);
This page took 0.096986 seconds and 5 git commands to generate.