3203 lines
86 KiB
C
3203 lines
86 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* jfs_imap.c: inode allocation map manager
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*
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* Serialization:
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* Each AG has a simple lock which is used to control the serialization of
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* the AG level lists. This lock should be taken first whenever an AG
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* level list will be modified or accessed.
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*
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* Each IAG is locked by obtaining the buffer for the IAG page.
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*
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* There is also a inode lock for the inode map inode. A read lock needs to
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* be taken whenever an IAG is read from the map or the global level
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* information is read. A write lock needs to be taken whenever the global
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* level information is modified or an atomic operation needs to be used.
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*
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* If more than one IAG is read at one time, the read lock may not
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* be given up until all of the IAG's are read. Otherwise, a deadlock
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* may occur when trying to obtain the read lock while another thread
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* holding the read lock is waiting on the IAG already being held.
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*
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* The control page of the inode map is read into memory by diMount().
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* Thereafter it should only be modified in memory and then it will be
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* written out when the filesystem is unmounted by diUnmount().
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*/
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#include <linux/fs.h>
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#include <linux/buffer_head.h>
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#include <linux/pagemap.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_filsys.h"
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#include "jfs_dinode.h"
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#include "jfs_dmap.h"
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#include "jfs_imap.h"
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#include "jfs_metapage.h"
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#include "jfs_superblock.h"
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#include "jfs_debug.h"
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/*
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* __mark_inode_dirty expects inodes to be hashed. Since we don't want
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* special inodes in the fileset inode space, we hash them to a dummy head
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*/
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static HLIST_HEAD(aggregate_hash);
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/*
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* imap locks
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*/
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/* iag free list lock */
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#define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock)
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#define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock)
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#define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock)
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/* per ag iag list locks */
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#define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index]))
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#define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno])
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#define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno])
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/*
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* forward references
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*/
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static int diAllocAG(struct inomap *, int, bool, struct inode *);
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static int diAllocAny(struct inomap *, int, bool, struct inode *);
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static int diAllocBit(struct inomap *, struct iag *, int);
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static int diAllocExt(struct inomap *, int, struct inode *);
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static int diAllocIno(struct inomap *, int, struct inode *);
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static int diFindFree(u32, int);
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static int diNewExt(struct inomap *, struct iag *, int);
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static int diNewIAG(struct inomap *, int *, int, struct metapage **);
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static void duplicateIXtree(struct super_block *, s64, int, s64 *);
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static int diIAGRead(struct inomap * imap, int, struct metapage **);
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static int copy_from_dinode(struct dinode *, struct inode *);
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static void copy_to_dinode(struct dinode *, struct inode *);
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/*
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* NAME: diMount()
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*
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* FUNCTION: initialize the incore inode map control structures for
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* a fileset or aggregate init time.
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*
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* the inode map's control structure (dinomap) is
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* brought in from disk and placed in virtual memory.
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*
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* PARAMETERS:
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* ipimap - pointer to inode map inode for the aggregate or fileset.
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*
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* RETURN VALUES:
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* 0 - success
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* -ENOMEM - insufficient free virtual memory.
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* -EIO - i/o error.
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*/
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int diMount(struct inode *ipimap)
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{
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struct inomap *imap;
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struct metapage *mp;
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int index;
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struct dinomap_disk *dinom_le;
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/*
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* allocate/initialize the in-memory inode map control structure
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*/
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/* allocate the in-memory inode map control structure. */
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imap = kmalloc(sizeof(struct inomap), GFP_KERNEL);
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if (imap == NULL) {
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jfs_err("diMount: kmalloc returned NULL!");
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return -ENOMEM;
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}
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/* read the on-disk inode map control structure. */
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mp = read_metapage(ipimap,
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IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
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PSIZE, 0);
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if (mp == NULL) {
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kfree(imap);
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return -EIO;
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}
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/* copy the on-disk version to the in-memory version. */
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dinom_le = (struct dinomap_disk *) mp->data;
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imap->im_freeiag = le32_to_cpu(dinom_le->in_freeiag);
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imap->im_nextiag = le32_to_cpu(dinom_le->in_nextiag);
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atomic_set(&imap->im_numinos, le32_to_cpu(dinom_le->in_numinos));
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atomic_set(&imap->im_numfree, le32_to_cpu(dinom_le->in_numfree));
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imap->im_nbperiext = le32_to_cpu(dinom_le->in_nbperiext);
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imap->im_l2nbperiext = le32_to_cpu(dinom_le->in_l2nbperiext);
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for (index = 0; index < MAXAG; index++) {
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imap->im_agctl[index].inofree =
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le32_to_cpu(dinom_le->in_agctl[index].inofree);
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imap->im_agctl[index].extfree =
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le32_to_cpu(dinom_le->in_agctl[index].extfree);
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imap->im_agctl[index].numinos =
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le32_to_cpu(dinom_le->in_agctl[index].numinos);
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imap->im_agctl[index].numfree =
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le32_to_cpu(dinom_le->in_agctl[index].numfree);
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}
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/* release the buffer. */
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release_metapage(mp);
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/*
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* allocate/initialize inode allocation map locks
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*/
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/* allocate and init iag free list lock */
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IAGFREE_LOCK_INIT(imap);
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/* allocate and init ag list locks */
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for (index = 0; index < MAXAG; index++) {
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AG_LOCK_INIT(imap, index);
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}
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/* bind the inode map inode and inode map control structure
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* to each other.
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*/
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imap->im_ipimap = ipimap;
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JFS_IP(ipimap)->i_imap = imap;
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return (0);
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}
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/*
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* NAME: diUnmount()
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*
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* FUNCTION: write to disk the incore inode map control structures for
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* a fileset or aggregate at unmount time.
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*
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* PARAMETERS:
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* ipimap - pointer to inode map inode for the aggregate or fileset.
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*
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* RETURN VALUES:
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* 0 - success
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* -ENOMEM - insufficient free virtual memory.
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* -EIO - i/o error.
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*/
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int diUnmount(struct inode *ipimap, int mounterror)
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{
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struct inomap *imap = JFS_IP(ipimap)->i_imap;
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/*
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* update the on-disk inode map control structure
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*/
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if (!(mounterror || isReadOnly(ipimap)))
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diSync(ipimap);
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/*
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* Invalidate the page cache buffers
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*/
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truncate_inode_pages(ipimap->i_mapping, 0);
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/*
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* free in-memory control structure
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*/
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kfree(imap);
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return (0);
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}
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/*
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* diSync()
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*/
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int diSync(struct inode *ipimap)
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{
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struct dinomap_disk *dinom_le;
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struct inomap *imp = JFS_IP(ipimap)->i_imap;
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struct metapage *mp;
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int index;
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/*
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* write imap global conrol page
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*/
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/* read the on-disk inode map control structure */
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mp = get_metapage(ipimap,
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IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
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PSIZE, 0);
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if (mp == NULL) {
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jfs_err("diSync: get_metapage failed!");
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return -EIO;
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}
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/* copy the in-memory version to the on-disk version */
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dinom_le = (struct dinomap_disk *) mp->data;
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dinom_le->in_freeiag = cpu_to_le32(imp->im_freeiag);
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dinom_le->in_nextiag = cpu_to_le32(imp->im_nextiag);
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dinom_le->in_numinos = cpu_to_le32(atomic_read(&imp->im_numinos));
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dinom_le->in_numfree = cpu_to_le32(atomic_read(&imp->im_numfree));
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dinom_le->in_nbperiext = cpu_to_le32(imp->im_nbperiext);
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dinom_le->in_l2nbperiext = cpu_to_le32(imp->im_l2nbperiext);
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for (index = 0; index < MAXAG; index++) {
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dinom_le->in_agctl[index].inofree =
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cpu_to_le32(imp->im_agctl[index].inofree);
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dinom_le->in_agctl[index].extfree =
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cpu_to_le32(imp->im_agctl[index].extfree);
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dinom_le->in_agctl[index].numinos =
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cpu_to_le32(imp->im_agctl[index].numinos);
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dinom_le->in_agctl[index].numfree =
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cpu_to_le32(imp->im_agctl[index].numfree);
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}
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/* write out the control structure */
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write_metapage(mp);
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/*
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* write out dirty pages of imap
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*/
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filemap_write_and_wait(ipimap->i_mapping);
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diWriteSpecial(ipimap, 0);
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return (0);
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}
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/*
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* NAME: diRead()
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*
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* FUNCTION: initialize an incore inode from disk.
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*
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* on entry, the specifed incore inode should itself
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* specify the disk inode number corresponding to the
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* incore inode (i.e. i_number should be initialized).
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*
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* this routine handles incore inode initialization for
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* both "special" and "regular" inodes. special inodes
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* are those required early in the mount process and
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* require special handling since much of the file system
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* is not yet initialized. these "special" inodes are
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* identified by a NULL inode map inode pointer and are
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* actually initialized by a call to diReadSpecial().
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*
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* for regular inodes, the iag describing the disk inode
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* is read from disk to determine the inode extent address
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* for the disk inode. with the inode extent address in
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* hand, the page of the extent that contains the disk
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* inode is read and the disk inode is copied to the
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* incore inode.
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*
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* PARAMETERS:
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* ip - pointer to incore inode to be initialized from disk.
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*
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* RETURN VALUES:
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* 0 - success
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* -EIO - i/o error.
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* -ENOMEM - insufficient memory
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*
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*/
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int diRead(struct inode *ip)
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{
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struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
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int iagno, ino, extno, rc;
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struct inode *ipimap;
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struct dinode *dp;
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struct iag *iagp;
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struct metapage *mp;
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s64 blkno, agstart;
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struct inomap *imap;
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int block_offset;
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int inodes_left;
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unsigned long pageno;
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int rel_inode;
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jfs_info("diRead: ino = %ld", ip->i_ino);
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ipimap = sbi->ipimap;
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JFS_IP(ip)->ipimap = ipimap;
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/* determine the iag number for this inode (number) */
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iagno = INOTOIAG(ip->i_ino);
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/* read the iag */
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imap = JFS_IP(ipimap)->i_imap;
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IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
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rc = diIAGRead(imap, iagno, &mp);
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IREAD_UNLOCK(ipimap);
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if (rc) {
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jfs_err("diRead: diIAGRead returned %d", rc);
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return (rc);
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}
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iagp = (struct iag *) mp->data;
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/* determine inode extent that holds the disk inode */
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ino = ip->i_ino & (INOSPERIAG - 1);
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extno = ino >> L2INOSPEREXT;
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if ((lengthPXD(&iagp->inoext[extno]) != imap->im_nbperiext) ||
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(addressPXD(&iagp->inoext[extno]) == 0)) {
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release_metapage(mp);
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return -ESTALE;
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}
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/* get disk block number of the page within the inode extent
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* that holds the disk inode.
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*/
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blkno = INOPBLK(&iagp->inoext[extno], ino, sbi->l2nbperpage);
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/* get the ag for the iag */
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agstart = le64_to_cpu(iagp->agstart);
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release_metapage(mp);
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rel_inode = (ino & (INOSPERPAGE - 1));
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pageno = blkno >> sbi->l2nbperpage;
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if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) {
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/*
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* OS/2 didn't always align inode extents on page boundaries
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*/
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inodes_left =
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(sbi->nbperpage - block_offset) << sbi->l2niperblk;
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if (rel_inode < inodes_left)
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rel_inode += block_offset << sbi->l2niperblk;
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else {
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pageno += 1;
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rel_inode -= inodes_left;
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}
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}
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/* read the page of disk inode */
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mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1);
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if (mp == 0) {
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jfs_err("diRead: read_metapage failed");
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return -EIO;
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}
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/* locate the the disk inode requested */
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dp = (struct dinode *) mp->data;
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dp += rel_inode;
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if (ip->i_ino != le32_to_cpu(dp->di_number)) {
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jfs_error(ip->i_sb, "diRead: i_ino != di_number");
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rc = -EIO;
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} else if (le32_to_cpu(dp->di_nlink) == 0)
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rc = -ESTALE;
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else
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/* copy the disk inode to the in-memory inode */
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rc = copy_from_dinode(dp, ip);
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release_metapage(mp);
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/* set the ag for the inode */
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JFS_IP(ip)->agno = BLKTOAG(agstart, sbi);
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JFS_IP(ip)->active_ag = -1;
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return (rc);
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}
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/*
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* NAME: diReadSpecial()
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*
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* FUNCTION: initialize a 'special' inode from disk.
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*
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* this routines handles aggregate level inodes. The
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* inode cache cannot differentiate between the
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* aggregate inodes and the filesystem inodes, so we
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* handle these here. We don't actually use the aggregate
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* inode map, since these inodes are at a fixed location
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* and in some cases the aggregate inode map isn't initialized
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* yet.
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*
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* PARAMETERS:
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* sb - filesystem superblock
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* inum - aggregate inode number
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* secondary - 1 if secondary aggregate inode table
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*
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* RETURN VALUES:
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* new inode - success
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* NULL - i/o error.
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*/
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struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
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{
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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uint address;
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struct dinode *dp;
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struct inode *ip;
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struct metapage *mp;
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ip = new_inode(sb);
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if (ip == NULL) {
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jfs_err("diReadSpecial: new_inode returned NULL!");
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return ip;
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}
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if (secondary) {
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address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage;
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JFS_IP(ip)->ipimap = sbi->ipaimap2;
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} else {
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address = AITBL_OFF >> L2PSIZE;
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JFS_IP(ip)->ipimap = sbi->ipaimap;
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}
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ASSERT(inum < INOSPEREXT);
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ip->i_ino = inum;
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address += inum >> 3; /* 8 inodes per 4K page */
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/* read the page of fixed disk inode (AIT) in raw mode */
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mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1);
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if (mp == NULL) {
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ip->i_nlink = 1; /* Don't want iput() deleting it */
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iput(ip);
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return (NULL);
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}
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|
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/* get the pointer to the disk inode of interest */
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dp = (struct dinode *) (mp->data);
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dp += inum % 8; /* 8 inodes per 4K page */
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|
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/* copy on-disk inode to in-memory inode */
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if ((copy_from_dinode(dp, ip)) != 0) {
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/* handle bad return by returning NULL for ip */
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ip->i_nlink = 1; /* Don't want iput() deleting it */
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iput(ip);
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/* release the page */
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release_metapage(mp);
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return (NULL);
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}
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ip->i_mapping->a_ops = &jfs_metapage_aops;
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mapping_set_gfp_mask(ip->i_mapping, GFP_NOFS);
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/* Allocations to metadata inodes should not affect quotas */
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ip->i_flags |= S_NOQUOTA;
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if ((inum == FILESYSTEM_I) && (JFS_IP(ip)->ipimap == sbi->ipaimap)) {
|
|
sbi->gengen = le32_to_cpu(dp->di_gengen);
|
|
sbi->inostamp = le32_to_cpu(dp->di_inostamp);
|
|
}
|
|
|
|
/* release the page */
|
|
release_metapage(mp);
|
|
|
|
hlist_add_head(&ip->i_hash, &aggregate_hash);
|
|
|
|
return (ip);
|
|
}
|
|
|
|
/*
|
|
* NAME: diWriteSpecial()
|
|
*
|
|
* FUNCTION: Write the special inode to disk
|
|
*
|
|
* PARAMETERS:
|
|
* ip - special inode
|
|
* secondary - 1 if secondary aggregate inode table
|
|
*
|
|
* RETURN VALUES: none
|
|
*/
|
|
|
|
void diWriteSpecial(struct inode *ip, int secondary)
|
|
{
|
|
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
|
|
uint address;
|
|
struct dinode *dp;
|
|
ino_t inum = ip->i_ino;
|
|
struct metapage *mp;
|
|
|
|
if (secondary)
|
|
address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage;
|
|
else
|
|
address = AITBL_OFF >> L2PSIZE;
|
|
|
|
ASSERT(inum < INOSPEREXT);
|
|
|
|
address += inum >> 3; /* 8 inodes per 4K page */
|
|
|
|
/* read the page of fixed disk inode (AIT) in raw mode */
|
|
mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1);
|
|
if (mp == NULL) {
|
|
jfs_err("diWriteSpecial: failed to read aggregate inode "
|
|
"extent!");
|
|
return;
|
|
}
|
|
|
|
/* get the pointer to the disk inode of interest */
|
|
dp = (struct dinode *) (mp->data);
|
|
dp += inum % 8; /* 8 inodes per 4K page */
|
|
|
|
/* copy on-disk inode to in-memory inode */
|
|
copy_to_dinode(dp, ip);
|
|
memcpy(&dp->di_xtroot, &JFS_IP(ip)->i_xtroot, 288);
|
|
|
|
if (inum == FILESYSTEM_I)
|
|
dp->di_gengen = cpu_to_le32(sbi->gengen);
|
|
|
|
/* write the page */
|
|
write_metapage(mp);
|
|
}
|
|
|
|
/*
|
|
* NAME: diFreeSpecial()
|
|
*
|
|
* FUNCTION: Free allocated space for special inode
|
|
*/
|
|
void diFreeSpecial(struct inode *ip)
|
|
{
|
|
if (ip == NULL) {
|
|
jfs_err("diFreeSpecial called with NULL ip!");
|
|
return;
|
|
}
|
|
filemap_write_and_wait(ip->i_mapping);
|
|
truncate_inode_pages(ip->i_mapping, 0);
|
|
iput(ip);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* NAME: diWrite()
|
|
*
|
|
* FUNCTION: write the on-disk inode portion of the in-memory inode
|
|
* to its corresponding on-disk inode.
|
|
*
|
|
* on entry, the specifed incore inode should itself
|
|
* specify the disk inode number corresponding to the
|
|
* incore inode (i.e. i_number should be initialized).
|
|
*
|
|
* the inode contains the inode extent address for the disk
|
|
* inode. with the inode extent address in hand, the
|
|
* page of the extent that contains the disk inode is
|
|
* read and the disk inode portion of the incore inode
|
|
* is copied to the disk inode.
|
|
*
|
|
* PARAMETERS:
|
|
* tid - transacation id
|
|
* ip - pointer to incore inode to be written to the inode extent.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success
|
|
* -EIO - i/o error.
|
|
*/
|
|
int diWrite(tid_t tid, struct inode *ip)
|
|
{
|
|
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
int rc = 0;
|
|
s32 ino;
|
|
struct dinode *dp;
|
|
s64 blkno;
|
|
int block_offset;
|
|
int inodes_left;
|
|
struct metapage *mp;
|
|
unsigned long pageno;
|
|
int rel_inode;
|
|
int dioffset;
|
|
struct inode *ipimap;
|
|
uint type;
|
|
lid_t lid;
|
|
struct tlock *ditlck, *tlck;
|
|
struct linelock *dilinelock, *ilinelock;
|
|
struct lv *lv;
|
|
int n;
|
|
|
|
ipimap = jfs_ip->ipimap;
|
|
|
|
ino = ip->i_ino & (INOSPERIAG - 1);
|
|
|
|
if (!addressPXD(&(jfs_ip->ixpxd)) ||
|
|
(lengthPXD(&(jfs_ip->ixpxd)) !=
|
|
JFS_IP(ipimap)->i_imap->im_nbperiext)) {
|
|
jfs_error(ip->i_sb, "diWrite: ixpxd invalid");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* read the page of disk inode containing the specified inode:
|
|
*/
|
|
/* compute the block address of the page */
|
|
blkno = INOPBLK(&(jfs_ip->ixpxd), ino, sbi->l2nbperpage);
|
|
|
|
rel_inode = (ino & (INOSPERPAGE - 1));
|
|
pageno = blkno >> sbi->l2nbperpage;
|
|
|
|
if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) {
|
|
/*
|
|
* OS/2 didn't always align inode extents on page boundaries
|
|
*/
|
|
inodes_left =
|
|
(sbi->nbperpage - block_offset) << sbi->l2niperblk;
|
|
|
|
if (rel_inode < inodes_left)
|
|
rel_inode += block_offset << sbi->l2niperblk;
|
|
else {
|
|
pageno += 1;
|
|
rel_inode -= inodes_left;
|
|
}
|
|
}
|
|
/* read the page of disk inode */
|
|
retry:
|
|
mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1);
|
|
if (mp == 0)
|
|
return -EIO;
|
|
|
|
/* get the pointer to the disk inode */
|
|
dp = (struct dinode *) mp->data;
|
|
dp += rel_inode;
|
|
|
|
dioffset = (ino & (INOSPERPAGE - 1)) << L2DISIZE;
|
|
|
|
/*
|
|
* acquire transaction lock on the on-disk inode;
|
|
* N.B. tlock is acquired on ipimap not ip;
|
|
*/
|
|
if ((ditlck =
|
|
txLock(tid, ipimap, mp, tlckINODE | tlckENTRY)) == NULL)
|
|
goto retry;
|
|
dilinelock = (struct linelock *) & ditlck->lock;
|
|
|
|
/*
|
|
* copy btree root from in-memory inode to on-disk inode
|
|
*
|
|
* (tlock is taken from inline B+-tree root in in-memory
|
|
* inode when the B+-tree root is updated, which is pointed
|
|
* by jfs_ip->blid as well as being on tx tlock list)
|
|
*
|
|
* further processing of btree root is based on the copy
|
|
* in in-memory inode, where txLog() will log from, and,
|
|
* for xtree root, txUpdateMap() will update map and reset
|
|
* XAD_NEW bit;
|
|
*/
|
|
|
|
if (S_ISDIR(ip->i_mode) && (lid = jfs_ip->xtlid)) {
|
|
/*
|
|
* This is the special xtree inside the directory for storing
|
|
* the directory table
|
|
*/
|
|
xtpage_t *p, *xp;
|
|
xad_t *xad;
|
|
|
|
jfs_ip->xtlid = 0;
|
|
tlck = lid_to_tlock(lid);
|
|
assert(tlck->type & tlckXTREE);
|
|
tlck->type |= tlckBTROOT;
|
|
tlck->mp = mp;
|
|
ilinelock = (struct linelock *) & tlck->lock;
|
|
|
|
/*
|
|
* copy xtree root from inode to dinode:
|
|
*/
|
|
p = &jfs_ip->i_xtroot;
|
|
xp = (xtpage_t *) &dp->di_dirtable;
|
|
lv = ilinelock->lv;
|
|
for (n = 0; n < ilinelock->index; n++, lv++) {
|
|
memcpy(&xp->xad[lv->offset], &p->xad[lv->offset],
|
|
lv->length << L2XTSLOTSIZE);
|
|
}
|
|
|
|
/* reset on-disk (metadata page) xtree XAD_NEW bit */
|
|
xad = &xp->xad[XTENTRYSTART];
|
|
for (n = XTENTRYSTART;
|
|
n < le16_to_cpu(xp->header.nextindex); n++, xad++)
|
|
if (xad->flag & (XAD_NEW | XAD_EXTENDED))
|
|
xad->flag &= ~(XAD_NEW | XAD_EXTENDED);
|
|
}
|
|
|
|
if ((lid = jfs_ip->blid) == 0)
|
|
goto inlineData;
|
|
jfs_ip->blid = 0;
|
|
|
|
tlck = lid_to_tlock(lid);
|
|
type = tlck->type;
|
|
tlck->type |= tlckBTROOT;
|
|
tlck->mp = mp;
|
|
ilinelock = (struct linelock *) & tlck->lock;
|
|
|
|
/*
|
|
* regular file: 16 byte (XAD slot) granularity
|
|
*/
|
|
if (type & tlckXTREE) {
|
|
xtpage_t *p, *xp;
|
|
xad_t *xad;
|
|
|
|
/*
|
|
* copy xtree root from inode to dinode:
|
|
*/
|
|
p = &jfs_ip->i_xtroot;
|
|
xp = &dp->di_xtroot;
|
|
lv = ilinelock->lv;
|
|
for (n = 0; n < ilinelock->index; n++, lv++) {
|
|
memcpy(&xp->xad[lv->offset], &p->xad[lv->offset],
|
|
lv->length << L2XTSLOTSIZE);
|
|
}
|
|
|
|
/* reset on-disk (metadata page) xtree XAD_NEW bit */
|
|
xad = &xp->xad[XTENTRYSTART];
|
|
for (n = XTENTRYSTART;
|
|
n < le16_to_cpu(xp->header.nextindex); n++, xad++)
|
|
if (xad->flag & (XAD_NEW | XAD_EXTENDED))
|
|
xad->flag &= ~(XAD_NEW | XAD_EXTENDED);
|
|
}
|
|
/*
|
|
* directory: 32 byte (directory entry slot) granularity
|
|
*/
|
|
else if (type & tlckDTREE) {
|
|
dtpage_t *p, *xp;
|
|
|
|
/*
|
|
* copy dtree root from inode to dinode:
|
|
*/
|
|
p = (dtpage_t *) &jfs_ip->i_dtroot;
|
|
xp = (dtpage_t *) & dp->di_dtroot;
|
|
lv = ilinelock->lv;
|
|
for (n = 0; n < ilinelock->index; n++, lv++) {
|
|
memcpy(&xp->slot[lv->offset], &p->slot[lv->offset],
|
|
lv->length << L2DTSLOTSIZE);
|
|
}
|
|
} else {
|
|
jfs_err("diWrite: UFO tlock");
|
|
}
|
|
|
|
inlineData:
|
|
/*
|
|
* copy inline symlink from in-memory inode to on-disk inode
|
|
*/
|
|
if (S_ISLNK(ip->i_mode) && ip->i_size < IDATASIZE) {
|
|
lv = & dilinelock->lv[dilinelock->index];
|
|
lv->offset = (dioffset + 2 * 128) >> L2INODESLOTSIZE;
|
|
lv->length = 2;
|
|
memcpy(&dp->di_fastsymlink, jfs_ip->i_inline, IDATASIZE);
|
|
dilinelock->index++;
|
|
}
|
|
/*
|
|
* copy inline data from in-memory inode to on-disk inode:
|
|
* 128 byte slot granularity
|
|
*/
|
|
if (test_cflag(COMMIT_Inlineea, ip)) {
|
|
lv = & dilinelock->lv[dilinelock->index];
|
|
lv->offset = (dioffset + 3 * 128) >> L2INODESLOTSIZE;
|
|
lv->length = 1;
|
|
memcpy(&dp->di_inlineea, jfs_ip->i_inline_ea, INODESLOTSIZE);
|
|
dilinelock->index++;
|
|
|
|
clear_cflag(COMMIT_Inlineea, ip);
|
|
}
|
|
|
|
/*
|
|
* lock/copy inode base: 128 byte slot granularity
|
|
*/
|
|
// baseDinode:
|
|
lv = & dilinelock->lv[dilinelock->index];
|
|
lv->offset = dioffset >> L2INODESLOTSIZE;
|
|
copy_to_dinode(dp, ip);
|
|
if (test_and_clear_cflag(COMMIT_Dirtable, ip)) {
|
|
lv->length = 2;
|
|
memcpy(&dp->di_dirtable, &jfs_ip->i_dirtable, 96);
|
|
} else
|
|
lv->length = 1;
|
|
dilinelock->index++;
|
|
|
|
#ifdef _JFS_FASTDASD
|
|
/*
|
|
* We aren't logging changes to the DASD used in directory inodes,
|
|
* but we need to write them to disk. If we don't unmount cleanly,
|
|
* mount will recalculate the DASD used.
|
|
*/
|
|
if (S_ISDIR(ip->i_mode)
|
|
&& (ip->i_ipmnt->i_mntflag & JFS_DASD_ENABLED))
|
|
memcpy(&dp->di_DASD, &ip->i_DASD, sizeof(struct dasd));
|
|
#endif /* _JFS_FASTDASD */
|
|
|
|
/* release the buffer holding the updated on-disk inode.
|
|
* the buffer will be later written by commit processing.
|
|
*/
|
|
write_metapage(mp);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diFree(ip)
|
|
*
|
|
* FUNCTION: free a specified inode from the inode working map
|
|
* for a fileset or aggregate.
|
|
*
|
|
* if the inode to be freed represents the first (only)
|
|
* free inode within the iag, the iag will be placed on
|
|
* the ag free inode list.
|
|
*
|
|
* freeing the inode will cause the inode extent to be
|
|
* freed if the inode is the only allocated inode within
|
|
* the extent. in this case all the disk resource backing
|
|
* up the inode extent will be freed. in addition, the iag
|
|
* will be placed on the ag extent free list if the extent
|
|
* is the first free extent in the iag. if freeing the
|
|
* extent also means that no free inodes will exist for
|
|
* the iag, the iag will also be removed from the ag free
|
|
* inode list.
|
|
*
|
|
* the iag describing the inode will be freed if the extent
|
|
* is to be freed and it is the only backed extent within
|
|
* the iag. in this case, the iag will be removed from the
|
|
* ag free extent list and ag free inode list and placed on
|
|
* the inode map's free iag list.
|
|
*
|
|
* a careful update approach is used to provide consistency
|
|
* in the face of updates to multiple buffers. under this
|
|
* approach, all required buffers are obtained before making
|
|
* any updates and are held until all updates are complete.
|
|
*
|
|
* PARAMETERS:
|
|
* ip - inode to be freed.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success
|
|
* -EIO - i/o error.
|
|
*/
|
|
int diFree(struct inode *ip)
|
|
{
|
|
int rc;
|
|
ino_t inum = ip->i_ino;
|
|
struct iag *iagp, *aiagp, *biagp, *ciagp, *diagp;
|
|
struct metapage *mp, *amp, *bmp, *cmp, *dmp;
|
|
int iagno, ino, extno, bitno, sword, agno;
|
|
int back, fwd;
|
|
u32 bitmap, mask;
|
|
struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap;
|
|
struct inomap *imap = JFS_IP(ipimap)->i_imap;
|
|
pxd_t freepxd;
|
|
tid_t tid;
|
|
struct inode *iplist[3];
|
|
struct tlock *tlck;
|
|
struct pxd_lock *pxdlock;
|
|
|
|
/*
|
|
* This is just to suppress compiler warnings. The same logic that
|
|
* references these variables is used to initialize them.
|
|
*/
|
|
aiagp = biagp = ciagp = diagp = NULL;
|
|
|
|
/* get the iag number containing the inode.
|
|
*/
|
|
iagno = INOTOIAG(inum);
|
|
|
|
/* make sure that the iag is contained within
|
|
* the map.
|
|
*/
|
|
if (iagno >= imap->im_nextiag) {
|
|
dump_mem("imap", imap, 32);
|
|
jfs_error(ip->i_sb,
|
|
"diFree: inum = %d, iagno = %d, nextiag = %d",
|
|
(uint) inum, iagno, imap->im_nextiag);
|
|
return -EIO;
|
|
}
|
|
|
|
/* get the allocation group for this ino.
|
|
*/
|
|
agno = JFS_IP(ip)->agno;
|
|
|
|
/* Lock the AG specific inode map information
|
|
*/
|
|
AG_LOCK(imap, agno);
|
|
|
|
/* Obtain read lock in imap inode. Don't release it until we have
|
|
* read all of the IAG's that we are going to.
|
|
*/
|
|
IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
|
|
|
|
/* read the iag.
|
|
*/
|
|
if ((rc = diIAGRead(imap, iagno, &mp))) {
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
return (rc);
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* get the inode number and extent number of the inode within
|
|
* the iag and the inode number within the extent.
|
|
*/
|
|
ino = inum & (INOSPERIAG - 1);
|
|
extno = ino >> L2INOSPEREXT;
|
|
bitno = ino & (INOSPEREXT - 1);
|
|
mask = HIGHORDER >> bitno;
|
|
|
|
if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) {
|
|
jfs_error(ip->i_sb,
|
|
"diFree: wmap shows inode already free");
|
|
}
|
|
|
|
if (!addressPXD(&iagp->inoext[extno])) {
|
|
release_metapage(mp);
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
jfs_error(ip->i_sb, "diFree: invalid inoext");
|
|
return -EIO;
|
|
}
|
|
|
|
/* compute the bitmap for the extent reflecting the freed inode.
|
|
*/
|
|
bitmap = le32_to_cpu(iagp->wmap[extno]) & ~mask;
|
|
|
|
if (imap->im_agctl[agno].numfree > imap->im_agctl[agno].numinos) {
|
|
release_metapage(mp);
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
jfs_error(ip->i_sb, "diFree: numfree > numinos");
|
|
return -EIO;
|
|
}
|
|
/*
|
|
* inode extent still has some inodes or below low water mark:
|
|
* keep the inode extent;
|
|
*/
|
|
if (bitmap ||
|
|
imap->im_agctl[agno].numfree < 96 ||
|
|
(imap->im_agctl[agno].numfree < 288 &&
|
|
(((imap->im_agctl[agno].numfree * 100) /
|
|
imap->im_agctl[agno].numinos) <= 25))) {
|
|
/* if the iag currently has no free inodes (i.e.,
|
|
* the inode being freed is the first free inode of iag),
|
|
* insert the iag at head of the inode free list for the ag.
|
|
*/
|
|
if (iagp->nfreeinos == 0) {
|
|
/* check if there are any iags on the ag inode
|
|
* free list. if so, read the first one so that
|
|
* we can link the current iag onto the list at
|
|
* the head.
|
|
*/
|
|
if ((fwd = imap->im_agctl[agno].inofree) >= 0) {
|
|
/* read the iag that currently is the head
|
|
* of the list.
|
|
*/
|
|
if ((rc = diIAGRead(imap, fwd, &))) {
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
release_metapage(mp);
|
|
return (rc);
|
|
}
|
|
aiagp = (struct iag *) amp->data;
|
|
|
|
/* make current head point back to the iag.
|
|
*/
|
|
aiagp->inofreeback = cpu_to_le32(iagno);
|
|
|
|
write_metapage(amp);
|
|
}
|
|
|
|
/* iag points forward to current head and iag
|
|
* becomes the new head of the list.
|
|
*/
|
|
iagp->inofreefwd =
|
|
cpu_to_le32(imap->im_agctl[agno].inofree);
|
|
iagp->inofreeback = cpu_to_le32(-1);
|
|
imap->im_agctl[agno].inofree = iagno;
|
|
}
|
|
IREAD_UNLOCK(ipimap);
|
|
|
|
/* update the free inode summary map for the extent if
|
|
* freeing the inode means the extent will now have free
|
|
* inodes (i.e., the inode being freed is the first free
|
|
* inode of extent),
|
|
*/
|
|
if (iagp->wmap[extno] == cpu_to_le32(ONES)) {
|
|
sword = extno >> L2EXTSPERSUM;
|
|
bitno = extno & (EXTSPERSUM - 1);
|
|
iagp->inosmap[sword] &=
|
|
cpu_to_le32(~(HIGHORDER >> bitno));
|
|
}
|
|
|
|
/* update the bitmap.
|
|
*/
|
|
iagp->wmap[extno] = cpu_to_le32(bitmap);
|
|
|
|
/* update the free inode counts at the iag, ag and
|
|
* map level.
|
|
*/
|
|
iagp->nfreeinos =
|
|
cpu_to_le32(le32_to_cpu(iagp->nfreeinos) + 1);
|
|
imap->im_agctl[agno].numfree += 1;
|
|
atomic_inc(&imap->im_numfree);
|
|
|
|
/* release the AG inode map lock
|
|
*/
|
|
AG_UNLOCK(imap, agno);
|
|
|
|
/* write the iag */
|
|
write_metapage(mp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* inode extent has become free and above low water mark:
|
|
* free the inode extent;
|
|
*/
|
|
|
|
/*
|
|
* prepare to update iag list(s) (careful update step 1)
|
|
*/
|
|
amp = bmp = cmp = dmp = NULL;
|
|
fwd = back = -1;
|
|
|
|
/* check if the iag currently has no free extents. if so,
|
|
* it will be placed on the head of the ag extent free list.
|
|
*/
|
|
if (iagp->nfreeexts == 0) {
|
|
/* check if the ag extent free list has any iags.
|
|
* if so, read the iag at the head of the list now.
|
|
* this (head) iag will be updated later to reflect
|
|
* the addition of the current iag at the head of
|
|
* the list.
|
|
*/
|
|
if ((fwd = imap->im_agctl[agno].extfree) >= 0) {
|
|
if ((rc = diIAGRead(imap, fwd, &)))
|
|
goto error_out;
|
|
aiagp = (struct iag *) amp->data;
|
|
}
|
|
} else {
|
|
/* iag has free extents. check if the addition of a free
|
|
* extent will cause all extents to be free within this
|
|
* iag. if so, the iag will be removed from the ag extent
|
|
* free list and placed on the inode map's free iag list.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) {
|
|
/* in preparation for removing the iag from the
|
|
* ag extent free list, read the iags preceeding
|
|
* and following the iag on the ag extent free
|
|
* list.
|
|
*/
|
|
if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) {
|
|
if ((rc = diIAGRead(imap, fwd, &)))
|
|
goto error_out;
|
|
aiagp = (struct iag *) amp->data;
|
|
}
|
|
|
|
if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) {
|
|
if ((rc = diIAGRead(imap, back, &bmp)))
|
|
goto error_out;
|
|
biagp = (struct iag *) bmp->data;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* remove the iag from the ag inode free list if freeing
|
|
* this extent cause the iag to have no free inodes.
|
|
*/
|
|
if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) {
|
|
int inofreeback = le32_to_cpu(iagp->inofreeback);
|
|
int inofreefwd = le32_to_cpu(iagp->inofreefwd);
|
|
|
|
/* in preparation for removing the iag from the
|
|
* ag inode free list, read the iags preceeding
|
|
* and following the iag on the ag inode free
|
|
* list. before reading these iags, we must make
|
|
* sure that we already don't have them in hand
|
|
* from up above, since re-reading an iag (buffer)
|
|
* we are currently holding would cause a deadlock.
|
|
*/
|
|
if (inofreefwd >= 0) {
|
|
|
|
if (inofreefwd == fwd)
|
|
ciagp = (struct iag *) amp->data;
|
|
else if (inofreefwd == back)
|
|
ciagp = (struct iag *) bmp->data;
|
|
else {
|
|
if ((rc =
|
|
diIAGRead(imap, inofreefwd, &cmp)))
|
|
goto error_out;
|
|
ciagp = (struct iag *) cmp->data;
|
|
}
|
|
assert(ciagp != NULL);
|
|
}
|
|
|
|
if (inofreeback >= 0) {
|
|
if (inofreeback == fwd)
|
|
diagp = (struct iag *) amp->data;
|
|
else if (inofreeback == back)
|
|
diagp = (struct iag *) bmp->data;
|
|
else {
|
|
if ((rc =
|
|
diIAGRead(imap, inofreeback, &dmp)))
|
|
goto error_out;
|
|
diagp = (struct iag *) dmp->data;
|
|
}
|
|
assert(diagp != NULL);
|
|
}
|
|
}
|
|
|
|
IREAD_UNLOCK(ipimap);
|
|
|
|
/*
|
|
* invalidate any page of the inode extent freed from buffer cache;
|
|
*/
|
|
freepxd = iagp->inoext[extno];
|
|
invalidate_pxd_metapages(ip, freepxd);
|
|
|
|
/*
|
|
* update iag list(s) (careful update step 2)
|
|
*/
|
|
/* add the iag to the ag extent free list if this is the
|
|
* first free extent for the iag.
|
|
*/
|
|
if (iagp->nfreeexts == 0) {
|
|
if (fwd >= 0)
|
|
aiagp->extfreeback = cpu_to_le32(iagno);
|
|
|
|
iagp->extfreefwd =
|
|
cpu_to_le32(imap->im_agctl[agno].extfree);
|
|
iagp->extfreeback = cpu_to_le32(-1);
|
|
imap->im_agctl[agno].extfree = iagno;
|
|
} else {
|
|
/* remove the iag from the ag extent list if all extents
|
|
* are now free and place it on the inode map iag free list.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) {
|
|
if (fwd >= 0)
|
|
aiagp->extfreeback = iagp->extfreeback;
|
|
|
|
if (back >= 0)
|
|
biagp->extfreefwd = iagp->extfreefwd;
|
|
else
|
|
imap->im_agctl[agno].extfree =
|
|
le32_to_cpu(iagp->extfreefwd);
|
|
|
|
iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1);
|
|
|
|
IAGFREE_LOCK(imap);
|
|
iagp->iagfree = cpu_to_le32(imap->im_freeiag);
|
|
imap->im_freeiag = iagno;
|
|
IAGFREE_UNLOCK(imap);
|
|
}
|
|
}
|
|
|
|
/* remove the iag from the ag inode free list if freeing
|
|
* this extent causes the iag to have no free inodes.
|
|
*/
|
|
if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) {
|
|
if ((int) le32_to_cpu(iagp->inofreefwd) >= 0)
|
|
ciagp->inofreeback = iagp->inofreeback;
|
|
|
|
if ((int) le32_to_cpu(iagp->inofreeback) >= 0)
|
|
diagp->inofreefwd = iagp->inofreefwd;
|
|
else
|
|
imap->im_agctl[agno].inofree =
|
|
le32_to_cpu(iagp->inofreefwd);
|
|
|
|
iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1);
|
|
}
|
|
|
|
/* update the inode extent address and working map
|
|
* to reflect the free extent.
|
|
* the permanent map should have been updated already
|
|
* for the inode being freed.
|
|
*/
|
|
if (iagp->pmap[extno] != 0) {
|
|
jfs_error(ip->i_sb, "diFree: the pmap does not show inode free");
|
|
}
|
|
iagp->wmap[extno] = 0;
|
|
PXDlength(&iagp->inoext[extno], 0);
|
|
PXDaddress(&iagp->inoext[extno], 0);
|
|
|
|
/* update the free extent and free inode summary maps
|
|
* to reflect the freed extent.
|
|
* the inode summary map is marked to indicate no inodes
|
|
* available for the freed extent.
|
|
*/
|
|
sword = extno >> L2EXTSPERSUM;
|
|
bitno = extno & (EXTSPERSUM - 1);
|
|
mask = HIGHORDER >> bitno;
|
|
iagp->inosmap[sword] |= cpu_to_le32(mask);
|
|
iagp->extsmap[sword] &= cpu_to_le32(~mask);
|
|
|
|
/* update the number of free inodes and number of free extents
|
|
* for the iag.
|
|
*/
|
|
iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) -
|
|
(INOSPEREXT - 1));
|
|
iagp->nfreeexts = cpu_to_le32(le32_to_cpu(iagp->nfreeexts) + 1);
|
|
|
|
/* update the number of free inodes and backed inodes
|
|
* at the ag and inode map level.
|
|
*/
|
|
imap->im_agctl[agno].numfree -= (INOSPEREXT - 1);
|
|
imap->im_agctl[agno].numinos -= INOSPEREXT;
|
|
atomic_sub(INOSPEREXT - 1, &imap->im_numfree);
|
|
atomic_sub(INOSPEREXT, &imap->im_numinos);
|
|
|
|
if (amp)
|
|
write_metapage(amp);
|
|
if (bmp)
|
|
write_metapage(bmp);
|
|
if (cmp)
|
|
write_metapage(cmp);
|
|
if (dmp)
|
|
write_metapage(dmp);
|
|
|
|
/*
|
|
* start transaction to update block allocation map
|
|
* for the inode extent freed;
|
|
*
|
|
* N.B. AG_LOCK is released and iag will be released below, and
|
|
* other thread may allocate inode from/reusing the ixad freed
|
|
* BUT with new/different backing inode extent from the extent
|
|
* to be freed by the transaction;
|
|
*/
|
|
tid = txBegin(ipimap->i_sb, COMMIT_FORCE);
|
|
mutex_lock(&JFS_IP(ipimap)->commit_mutex);
|
|
|
|
/* acquire tlock of the iag page of the freed ixad
|
|
* to force the page NOHOMEOK (even though no data is
|
|
* logged from the iag page) until NOREDOPAGE|FREEXTENT log
|
|
* for the free of the extent is committed;
|
|
* write FREEXTENT|NOREDOPAGE log record
|
|
* N.B. linelock is overlaid as freed extent descriptor;
|
|
*/
|
|
tlck = txLock(tid, ipimap, mp, tlckINODE | tlckFREE);
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
pxdlock->flag = mlckFREEPXD;
|
|
pxdlock->pxd = freepxd;
|
|
pxdlock->index = 1;
|
|
|
|
write_metapage(mp);
|
|
|
|
iplist[0] = ipimap;
|
|
|
|
/*
|
|
* logredo needs the IAG number and IAG extent index in order
|
|
* to ensure that the IMap is consistent. The least disruptive
|
|
* way to pass these values through to the transaction manager
|
|
* is in the iplist array.
|
|
*
|
|
* It's not pretty, but it works.
|
|
*/
|
|
iplist[1] = (struct inode *) (size_t)iagno;
|
|
iplist[2] = (struct inode *) (size_t)extno;
|
|
|
|
rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
|
|
|
|
txEnd(tid);
|
|
mutex_unlock(&JFS_IP(ipimap)->commit_mutex);
|
|
|
|
/* unlock the AG inode map information */
|
|
AG_UNLOCK(imap, agno);
|
|
|
|
return (0);
|
|
|
|
error_out:
|
|
IREAD_UNLOCK(ipimap);
|
|
|
|
if (amp)
|
|
release_metapage(amp);
|
|
if (bmp)
|
|
release_metapage(bmp);
|
|
if (cmp)
|
|
release_metapage(cmp);
|
|
if (dmp)
|
|
release_metapage(dmp);
|
|
|
|
AG_UNLOCK(imap, agno);
|
|
|
|
release_metapage(mp);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* There are several places in the diAlloc* routines where we initialize
|
|
* the inode.
|
|
*/
|
|
static inline void
|
|
diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp)
|
|
{
|
|
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
|
|
ip->i_ino = (iagno << L2INOSPERIAG) + ino;
|
|
jfs_ip->ixpxd = iagp->inoext[extno];
|
|
jfs_ip->agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi);
|
|
jfs_ip->active_ag = -1;
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAlloc(pip,dir,ip)
|
|
*
|
|
* FUNCTION: allocate a disk inode from the inode working map
|
|
* for a fileset or aggregate.
|
|
*
|
|
* PARAMETERS:
|
|
* pip - pointer to incore inode for the parent inode.
|
|
* dir - 'true' if the new disk inode is for a directory.
|
|
* ip - pointer to a new inode
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
int diAlloc(struct inode *pip, bool dir, struct inode *ip)
|
|
{
|
|
int rc, ino, iagno, addext, extno, bitno, sword;
|
|
int nwords, rem, i, agno;
|
|
u32 mask, inosmap, extsmap;
|
|
struct inode *ipimap;
|
|
struct metapage *mp;
|
|
ino_t inum;
|
|
struct iag *iagp;
|
|
struct inomap *imap;
|
|
|
|
/* get the pointers to the inode map inode and the
|
|
* corresponding imap control structure.
|
|
*/
|
|
ipimap = JFS_SBI(pip->i_sb)->ipimap;
|
|
imap = JFS_IP(ipimap)->i_imap;
|
|
JFS_IP(ip)->ipimap = ipimap;
|
|
JFS_IP(ip)->fileset = FILESYSTEM_I;
|
|
|
|
/* for a directory, the allocation policy is to start
|
|
* at the ag level using the preferred ag.
|
|
*/
|
|
if (dir) {
|
|
agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap);
|
|
AG_LOCK(imap, agno);
|
|
goto tryag;
|
|
}
|
|
|
|
/* for files, the policy starts off by trying to allocate from
|
|
* the same iag containing the parent disk inode:
|
|
* try to allocate the new disk inode close to the parent disk
|
|
* inode, using parent disk inode number + 1 as the allocation
|
|
* hint. (we use a left-to-right policy to attempt to avoid
|
|
* moving backward on the disk.) compute the hint within the
|
|
* file system and the iag.
|
|
*/
|
|
|
|
/* get the ag number of this iag */
|
|
agno = JFS_IP(pip)->agno;
|
|
|
|
if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) {
|
|
/*
|
|
* There is an open file actively growing. We want to
|
|
* allocate new inodes from a different ag to avoid
|
|
* fragmentation problems.
|
|
*/
|
|
agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap);
|
|
AG_LOCK(imap, agno);
|
|
goto tryag;
|
|
}
|
|
|
|
inum = pip->i_ino + 1;
|
|
ino = inum & (INOSPERIAG - 1);
|
|
|
|
/* back off the the hint if it is outside of the iag */
|
|
if (ino == 0)
|
|
inum = pip->i_ino;
|
|
|
|
/* lock the AG inode map information */
|
|
AG_LOCK(imap, agno);
|
|
|
|
/* Get read lock on imap inode */
|
|
IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
|
|
|
|
/* get the iag number and read the iag */
|
|
iagno = INOTOIAG(inum);
|
|
if ((rc = diIAGRead(imap, iagno, &mp))) {
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
return (rc);
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* determine if new inode extent is allowed to be added to the iag.
|
|
* new inode extent can be added to the iag if the ag
|
|
* has less than 32 free disk inodes and the iag has free extents.
|
|
*/
|
|
addext = (imap->im_agctl[agno].numfree < 32 && iagp->nfreeexts);
|
|
|
|
/*
|
|
* try to allocate from the IAG
|
|
*/
|
|
/* check if the inode may be allocated from the iag
|
|
* (i.e. the inode has free inodes or new extent can be added).
|
|
*/
|
|
if (iagp->nfreeinos || addext) {
|
|
/* determine the extent number of the hint.
|
|
*/
|
|
extno = ino >> L2INOSPEREXT;
|
|
|
|
/* check if the extent containing the hint has backed
|
|
* inodes. if so, try to allocate within this extent.
|
|
*/
|
|
if (addressPXD(&iagp->inoext[extno])) {
|
|
bitno = ino & (INOSPEREXT - 1);
|
|
if ((bitno =
|
|
diFindFree(le32_to_cpu(iagp->wmap[extno]),
|
|
bitno))
|
|
< INOSPEREXT) {
|
|
ino = (extno << L2INOSPEREXT) + bitno;
|
|
|
|
/* a free inode (bit) was found within this
|
|
* extent, so allocate it.
|
|
*/
|
|
rc = diAllocBit(imap, iagp, ino);
|
|
IREAD_UNLOCK(ipimap);
|
|
if (rc) {
|
|
assert(rc == -EIO);
|
|
} else {
|
|
/* set the results of the allocation
|
|
* and write the iag.
|
|
*/
|
|
diInitInode(ip, iagno, ino, extno,
|
|
iagp);
|
|
mark_metapage_dirty(mp);
|
|
}
|
|
release_metapage(mp);
|
|
|
|
/* free the AG lock and return.
|
|
*/
|
|
AG_UNLOCK(imap, agno);
|
|
return (rc);
|
|
}
|
|
|
|
if (!addext)
|
|
extno =
|
|
(extno ==
|
|
EXTSPERIAG - 1) ? 0 : extno + 1;
|
|
}
|
|
|
|
/*
|
|
* no free inodes within the extent containing the hint.
|
|
*
|
|
* try to allocate from the backed extents following
|
|
* hint or, if appropriate (i.e. addext is true), allocate
|
|
* an extent of free inodes at or following the extent
|
|
* containing the hint.
|
|
*
|
|
* the free inode and free extent summary maps are used
|
|
* here, so determine the starting summary map position
|
|
* and the number of words we'll have to examine. again,
|
|
* the approach is to allocate following the hint, so we
|
|
* might have to initially ignore prior bits of the summary
|
|
* map that represent extents prior to the extent containing
|
|
* the hint and later revisit these bits.
|
|
*/
|
|
bitno = extno & (EXTSPERSUM - 1);
|
|
nwords = (bitno == 0) ? SMAPSZ : SMAPSZ + 1;
|
|
sword = extno >> L2EXTSPERSUM;
|
|
|
|
/* mask any prior bits for the starting words of the
|
|
* summary map.
|
|
*/
|
|
mask = ONES << (EXTSPERSUM - bitno);
|
|
inosmap = le32_to_cpu(iagp->inosmap[sword]) | mask;
|
|
extsmap = le32_to_cpu(iagp->extsmap[sword]) | mask;
|
|
|
|
/* scan the free inode and free extent summary maps for
|
|
* free resources.
|
|
*/
|
|
for (i = 0; i < nwords; i++) {
|
|
/* check if this word of the free inode summary
|
|
* map describes an extent with free inodes.
|
|
*/
|
|
if (~inosmap) {
|
|
/* an extent with free inodes has been
|
|
* found. determine the extent number
|
|
* and the inode number within the extent.
|
|
*/
|
|
rem = diFindFree(inosmap, 0);
|
|
extno = (sword << L2EXTSPERSUM) + rem;
|
|
rem = diFindFree(le32_to_cpu(iagp->wmap[extno]),
|
|
0);
|
|
if (rem >= INOSPEREXT) {
|
|
IREAD_UNLOCK(ipimap);
|
|
release_metapage(mp);
|
|
AG_UNLOCK(imap, agno);
|
|
jfs_error(ip->i_sb,
|
|
"diAlloc: can't find free bit "
|
|
"in wmap");
|
|
return EIO;
|
|
}
|
|
|
|
/* determine the inode number within the
|
|
* iag and allocate the inode from the
|
|
* map.
|
|
*/
|
|
ino = (extno << L2INOSPEREXT) + rem;
|
|
rc = diAllocBit(imap, iagp, ino);
|
|
IREAD_UNLOCK(ipimap);
|
|
if (rc)
|
|
assert(rc == -EIO);
|
|
else {
|
|
/* set the results of the allocation
|
|
* and write the iag.
|
|
*/
|
|
diInitInode(ip, iagno, ino, extno,
|
|
iagp);
|
|
mark_metapage_dirty(mp);
|
|
}
|
|
release_metapage(mp);
|
|
|
|
/* free the AG lock and return.
|
|
*/
|
|
AG_UNLOCK(imap, agno);
|
|
return (rc);
|
|
|
|
}
|
|
|
|
/* check if we may allocate an extent of free
|
|
* inodes and whether this word of the free
|
|
* extents summary map describes a free extent.
|
|
*/
|
|
if (addext && ~extsmap) {
|
|
/* a free extent has been found. determine
|
|
* the extent number.
|
|
*/
|
|
rem = diFindFree(extsmap, 0);
|
|
extno = (sword << L2EXTSPERSUM) + rem;
|
|
|
|
/* allocate an extent of free inodes.
|
|
*/
|
|
if ((rc = diNewExt(imap, iagp, extno))) {
|
|
/* if there is no disk space for a
|
|
* new extent, try to allocate the
|
|
* disk inode from somewhere else.
|
|
*/
|
|
if (rc == -ENOSPC)
|
|
break;
|
|
|
|
assert(rc == -EIO);
|
|
} else {
|
|
/* set the results of the allocation
|
|
* and write the iag.
|
|
*/
|
|
diInitInode(ip, iagno,
|
|
extno << L2INOSPEREXT,
|
|
extno, iagp);
|
|
mark_metapage_dirty(mp);
|
|
}
|
|
release_metapage(mp);
|
|
/* free the imap inode & the AG lock & return.
|
|
*/
|
|
IREAD_UNLOCK(ipimap);
|
|
AG_UNLOCK(imap, agno);
|
|
return (rc);
|
|
}
|
|
|
|
/* move on to the next set of summary map words.
|
|
*/
|
|
sword = (sword == SMAPSZ - 1) ? 0 : sword + 1;
|
|
inosmap = le32_to_cpu(iagp->inosmap[sword]);
|
|
extsmap = le32_to_cpu(iagp->extsmap[sword]);
|
|
}
|
|
}
|
|
/* unlock imap inode */
|
|
IREAD_UNLOCK(ipimap);
|
|
|
|
/* nothing doing in this iag, so release it. */
|
|
release_metapage(mp);
|
|
|
|
tryag:
|
|
/*
|
|
* try to allocate anywhere within the same AG as the parent inode.
|
|
*/
|
|
rc = diAllocAG(imap, agno, dir, ip);
|
|
|
|
AG_UNLOCK(imap, agno);
|
|
|
|
if (rc != -ENOSPC)
|
|
return (rc);
|
|
|
|
/*
|
|
* try to allocate in any AG.
|
|
*/
|
|
return (diAllocAny(imap, agno, dir, ip));
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAllocAG(imap,agno,dir,ip)
|
|
*
|
|
* FUNCTION: allocate a disk inode from the allocation group.
|
|
*
|
|
* this routine first determines if a new extent of free
|
|
* inodes should be added for the allocation group, with
|
|
* the current request satisfied from this extent. if this
|
|
* is the case, an attempt will be made to do just that. if
|
|
* this attempt fails or it has been determined that a new
|
|
* extent should not be added, an attempt is made to satisfy
|
|
* the request by allocating an existing (backed) free inode
|
|
* from the allocation group.
|
|
*
|
|
* PRE CONDITION: Already have the AG lock for this AG.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* agno - allocation group to allocate from.
|
|
* dir - 'true' if the new disk inode is for a directory.
|
|
* ip - pointer to the new inode to be filled in on successful return
|
|
* with the disk inode number allocated, its extent address
|
|
* and the start of the ag.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int
|
|
diAllocAG(struct inomap * imap, int agno, bool dir, struct inode *ip)
|
|
{
|
|
int rc, addext, numfree, numinos;
|
|
|
|
/* get the number of free and the number of backed disk
|
|
* inodes currently within the ag.
|
|
*/
|
|
numfree = imap->im_agctl[agno].numfree;
|
|
numinos = imap->im_agctl[agno].numinos;
|
|
|
|
if (numfree > numinos) {
|
|
jfs_error(ip->i_sb, "diAllocAG: numfree > numinos");
|
|
return -EIO;
|
|
}
|
|
|
|
/* determine if we should allocate a new extent of free inodes
|
|
* within the ag: for directory inodes, add a new extent
|
|
* if there are a small number of free inodes or number of free
|
|
* inodes is a small percentage of the number of backed inodes.
|
|
*/
|
|
if (dir)
|
|
addext = (numfree < 64 ||
|
|
(numfree < 256
|
|
&& ((numfree * 100) / numinos) <= 20));
|
|
else
|
|
addext = (numfree == 0);
|
|
|
|
/*
|
|
* try to allocate a new extent of free inodes.
|
|
*/
|
|
if (addext) {
|
|
/* if free space is not avaliable for this new extent, try
|
|
* below to allocate a free and existing (already backed)
|
|
* inode from the ag.
|
|
*/
|
|
if ((rc = diAllocExt(imap, agno, ip)) != -ENOSPC)
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* try to allocate an existing free inode from the ag.
|
|
*/
|
|
return (diAllocIno(imap, agno, ip));
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAllocAny(imap,agno,dir,iap)
|
|
*
|
|
* FUNCTION: allocate a disk inode from any other allocation group.
|
|
*
|
|
* this routine is called when an allocation attempt within
|
|
* the primary allocation group has failed. if attempts to
|
|
* allocate an inode from any allocation group other than the
|
|
* specified primary group.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* agno - primary allocation group (to avoid).
|
|
* dir - 'true' if the new disk inode is for a directory.
|
|
* ip - pointer to a new inode to be filled in on successful return
|
|
* with the disk inode number allocated, its extent address
|
|
* and the start of the ag.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int
|
|
diAllocAny(struct inomap * imap, int agno, bool dir, struct inode *ip)
|
|
{
|
|
int ag, rc;
|
|
int maxag = JFS_SBI(imap->im_ipimap->i_sb)->bmap->db_maxag;
|
|
|
|
|
|
/* try to allocate from the ags following agno up to
|
|
* the maximum ag number.
|
|
*/
|
|
for (ag = agno + 1; ag <= maxag; ag++) {
|
|
AG_LOCK(imap, ag);
|
|
|
|
rc = diAllocAG(imap, ag, dir, ip);
|
|
|
|
AG_UNLOCK(imap, ag);
|
|
|
|
if (rc != -ENOSPC)
|
|
return (rc);
|
|
}
|
|
|
|
/* try to allocate from the ags in front of agno.
|
|
*/
|
|
for (ag = 0; ag < agno; ag++) {
|
|
AG_LOCK(imap, ag);
|
|
|
|
rc = diAllocAG(imap, ag, dir, ip);
|
|
|
|
AG_UNLOCK(imap, ag);
|
|
|
|
if (rc != -ENOSPC)
|
|
return (rc);
|
|
}
|
|
|
|
/* no free disk inodes.
|
|
*/
|
|
return -ENOSPC;
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAllocIno(imap,agno,ip)
|
|
*
|
|
* FUNCTION: allocate a disk inode from the allocation group's free
|
|
* inode list, returning an error if this free list is
|
|
* empty (i.e. no iags on the list).
|
|
*
|
|
* allocation occurs from the first iag on the list using
|
|
* the iag's free inode summary map to find the leftmost
|
|
* free inode in the iag.
|
|
*
|
|
* PRE CONDITION: Already have AG lock for this AG.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* agno - allocation group.
|
|
* ip - pointer to new inode to be filled in on successful return
|
|
* with the disk inode number allocated, its extent address
|
|
* and the start of the ag.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int diAllocIno(struct inomap * imap, int agno, struct inode *ip)
|
|
{
|
|
int iagno, ino, rc, rem, extno, sword;
|
|
struct metapage *mp;
|
|
struct iag *iagp;
|
|
|
|
/* check if there are iags on the ag's free inode list.
|
|
*/
|
|
if ((iagno = imap->im_agctl[agno].inofree) < 0)
|
|
return -ENOSPC;
|
|
|
|
/* obtain read lock on imap inode */
|
|
IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP);
|
|
|
|
/* read the iag at the head of the list.
|
|
*/
|
|
if ((rc = diIAGRead(imap, iagno, &mp))) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
return (rc);
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* better be free inodes in this iag if it is on the
|
|
* list.
|
|
*/
|
|
if (!iagp->nfreeinos) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
release_metapage(mp);
|
|
jfs_error(ip->i_sb,
|
|
"diAllocIno: nfreeinos = 0, but iag on freelist");
|
|
return -EIO;
|
|
}
|
|
|
|
/* scan the free inode summary map to find an extent
|
|
* with free inodes.
|
|
*/
|
|
for (sword = 0;; sword++) {
|
|
if (sword >= SMAPSZ) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
release_metapage(mp);
|
|
jfs_error(ip->i_sb,
|
|
"diAllocIno: free inode not found in summary map");
|
|
return -EIO;
|
|
}
|
|
|
|
if (~iagp->inosmap[sword])
|
|
break;
|
|
}
|
|
|
|
/* found a extent with free inodes. determine
|
|
* the extent number.
|
|
*/
|
|
rem = diFindFree(le32_to_cpu(iagp->inosmap[sword]), 0);
|
|
if (rem >= EXTSPERSUM) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
release_metapage(mp);
|
|
jfs_error(ip->i_sb, "diAllocIno: no free extent found");
|
|
return -EIO;
|
|
}
|
|
extno = (sword << L2EXTSPERSUM) + rem;
|
|
|
|
/* find the first free inode in the extent.
|
|
*/
|
|
rem = diFindFree(le32_to_cpu(iagp->wmap[extno]), 0);
|
|
if (rem >= INOSPEREXT) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
release_metapage(mp);
|
|
jfs_error(ip->i_sb, "diAllocIno: free inode not found");
|
|
return -EIO;
|
|
}
|
|
|
|
/* compute the inode number within the iag.
|
|
*/
|
|
ino = (extno << L2INOSPEREXT) + rem;
|
|
|
|
/* allocate the inode.
|
|
*/
|
|
rc = diAllocBit(imap, iagp, ino);
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
if (rc) {
|
|
release_metapage(mp);
|
|
return (rc);
|
|
}
|
|
|
|
/* set the results of the allocation and write the iag.
|
|
*/
|
|
diInitInode(ip, iagno, ino, extno, iagp);
|
|
write_metapage(mp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAllocExt(imap,agno,ip)
|
|
*
|
|
* FUNCTION: add a new extent of free inodes to an iag, allocating
|
|
* an inode from this extent to satisfy the current allocation
|
|
* request.
|
|
*
|
|
* this routine first tries to find an existing iag with free
|
|
* extents through the ag free extent list. if list is not
|
|
* empty, the head of the list will be selected as the home
|
|
* of the new extent of free inodes. otherwise (the list is
|
|
* empty), a new iag will be allocated for the ag to contain
|
|
* the extent.
|
|
*
|
|
* once an iag has been selected, the free extent summary map
|
|
* is used to locate a free extent within the iag and diNewExt()
|
|
* is called to initialize the extent, with initialization
|
|
* including the allocation of the first inode of the extent
|
|
* for the purpose of satisfying this request.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* agno - allocation group number.
|
|
* ip - pointer to new inode to be filled in on successful return
|
|
* with the disk inode number allocated, its extent address
|
|
* and the start of the ag.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int diAllocExt(struct inomap * imap, int agno, struct inode *ip)
|
|
{
|
|
int rem, iagno, sword, extno, rc;
|
|
struct metapage *mp;
|
|
struct iag *iagp;
|
|
|
|
/* check if the ag has any iags with free extents. if not,
|
|
* allocate a new iag for the ag.
|
|
*/
|
|
if ((iagno = imap->im_agctl[agno].extfree) < 0) {
|
|
/* If successful, diNewIAG will obtain the read lock on the
|
|
* imap inode.
|
|
*/
|
|
if ((rc = diNewIAG(imap, &iagno, agno, &mp))) {
|
|
return (rc);
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* set the ag number if this a brand new iag
|
|
*/
|
|
iagp->agstart =
|
|
cpu_to_le64(AGTOBLK(agno, imap->im_ipimap));
|
|
} else {
|
|
/* read the iag.
|
|
*/
|
|
IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP);
|
|
if ((rc = diIAGRead(imap, iagno, &mp))) {
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
jfs_error(ip->i_sb, "diAllocExt: error reading iag");
|
|
return rc;
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
}
|
|
|
|
/* using the free extent summary map, find a free extent.
|
|
*/
|
|
for (sword = 0;; sword++) {
|
|
if (sword >= SMAPSZ) {
|
|
release_metapage(mp);
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
jfs_error(ip->i_sb,
|
|
"diAllocExt: free ext summary map not found");
|
|
return -EIO;
|
|
}
|
|
if (~iagp->extsmap[sword])
|
|
break;
|
|
}
|
|
|
|
/* determine the extent number of the free extent.
|
|
*/
|
|
rem = diFindFree(le32_to_cpu(iagp->extsmap[sword]), 0);
|
|
if (rem >= EXTSPERSUM) {
|
|
release_metapage(mp);
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
jfs_error(ip->i_sb, "diAllocExt: free extent not found");
|
|
return -EIO;
|
|
}
|
|
extno = (sword << L2EXTSPERSUM) + rem;
|
|
|
|
/* initialize the new extent.
|
|
*/
|
|
rc = diNewExt(imap, iagp, extno);
|
|
IREAD_UNLOCK(imap->im_ipimap);
|
|
if (rc) {
|
|
/* something bad happened. if a new iag was allocated,
|
|
* place it back on the inode map's iag free list, and
|
|
* clear the ag number information.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
|
|
IAGFREE_LOCK(imap);
|
|
iagp->iagfree = cpu_to_le32(imap->im_freeiag);
|
|
imap->im_freeiag = iagno;
|
|
IAGFREE_UNLOCK(imap);
|
|
}
|
|
write_metapage(mp);
|
|
return (rc);
|
|
}
|
|
|
|
/* set the results of the allocation and write the iag.
|
|
*/
|
|
diInitInode(ip, iagno, extno << L2INOSPEREXT, extno, iagp);
|
|
|
|
write_metapage(mp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diAllocBit(imap,iagp,ino)
|
|
*
|
|
* FUNCTION: allocate a backed inode from an iag.
|
|
*
|
|
* this routine performs the mechanics of allocating a
|
|
* specified inode from a backed extent.
|
|
*
|
|
* if the inode to be allocated represents the last free
|
|
* inode within the iag, the iag will be removed from the
|
|
* ag free inode list.
|
|
*
|
|
* a careful update approach is used to provide consistency
|
|
* in the face of updates to multiple buffers. under this
|
|
* approach, all required buffers are obtained before making
|
|
* any updates and are held all are updates are complete.
|
|
*
|
|
* PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
|
|
* this AG. Must have read lock on imap inode.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* iagp - pointer to iag.
|
|
* ino - inode number to be allocated within the iag.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino)
|
|
{
|
|
int extno, bitno, agno, sword, rc;
|
|
struct metapage *amp = NULL, *bmp = NULL;
|
|
struct iag *aiagp = NULL, *biagp = NULL;
|
|
u32 mask;
|
|
|
|
/* check if this is the last free inode within the iag.
|
|
* if so, it will have to be removed from the ag free
|
|
* inode list, so get the iags preceeding and following
|
|
* it on the list.
|
|
*/
|
|
if (iagp->nfreeinos == cpu_to_le32(1)) {
|
|
if ((int) le32_to_cpu(iagp->inofreefwd) >= 0) {
|
|
if ((rc =
|
|
diIAGRead(imap, le32_to_cpu(iagp->inofreefwd),
|
|
&)))
|
|
return (rc);
|
|
aiagp = (struct iag *) amp->data;
|
|
}
|
|
|
|
if ((int) le32_to_cpu(iagp->inofreeback) >= 0) {
|
|
if ((rc =
|
|
diIAGRead(imap,
|
|
le32_to_cpu(iagp->inofreeback),
|
|
&bmp))) {
|
|
if (amp)
|
|
release_metapage(amp);
|
|
return (rc);
|
|
}
|
|
biagp = (struct iag *) bmp->data;
|
|
}
|
|
}
|
|
|
|
/* get the ag number, extent number, inode number within
|
|
* the extent.
|
|
*/
|
|
agno = BLKTOAG(le64_to_cpu(iagp->agstart), JFS_SBI(imap->im_ipimap->i_sb));
|
|
extno = ino >> L2INOSPEREXT;
|
|
bitno = ino & (INOSPEREXT - 1);
|
|
|
|
/* compute the mask for setting the map.
|
|
*/
|
|
mask = HIGHORDER >> bitno;
|
|
|
|
/* the inode should be free and backed.
|
|
*/
|
|
if (((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) ||
|
|
((le32_to_cpu(iagp->wmap[extno]) & mask) != 0) ||
|
|
(addressPXD(&iagp->inoext[extno]) == 0)) {
|
|
if (amp)
|
|
release_metapage(amp);
|
|
if (bmp)
|
|
release_metapage(bmp);
|
|
|
|
jfs_error(imap->im_ipimap->i_sb,
|
|
"diAllocBit: iag inconsistent");
|
|
return -EIO;
|
|
}
|
|
|
|
/* mark the inode as allocated in the working map.
|
|
*/
|
|
iagp->wmap[extno] |= cpu_to_le32(mask);
|
|
|
|
/* check if all inodes within the extent are now
|
|
* allocated. if so, update the free inode summary
|
|
* map to reflect this.
|
|
*/
|
|
if (iagp->wmap[extno] == cpu_to_le32(ONES)) {
|
|
sword = extno >> L2EXTSPERSUM;
|
|
bitno = extno & (EXTSPERSUM - 1);
|
|
iagp->inosmap[sword] |= cpu_to_le32(HIGHORDER >> bitno);
|
|
}
|
|
|
|
/* if this was the last free inode in the iag, remove the
|
|
* iag from the ag free inode list.
|
|
*/
|
|
if (iagp->nfreeinos == cpu_to_le32(1)) {
|
|
if (amp) {
|
|
aiagp->inofreeback = iagp->inofreeback;
|
|
write_metapage(amp);
|
|
}
|
|
|
|
if (bmp) {
|
|
biagp->inofreefwd = iagp->inofreefwd;
|
|
write_metapage(bmp);
|
|
} else {
|
|
imap->im_agctl[agno].inofree =
|
|
le32_to_cpu(iagp->inofreefwd);
|
|
}
|
|
iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1);
|
|
}
|
|
|
|
/* update the free inode count at the iag, ag, inode
|
|
* map levels.
|
|
*/
|
|
iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) - 1);
|
|
imap->im_agctl[agno].numfree -= 1;
|
|
atomic_dec(&imap->im_numfree);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diNewExt(imap,iagp,extno)
|
|
*
|
|
* FUNCTION: initialize a new extent of inodes for an iag, allocating
|
|
* the first inode of the extent for use for the current
|
|
* allocation request.
|
|
*
|
|
* disk resources are allocated for the new extent of inodes
|
|
* and the inodes themselves are initialized to reflect their
|
|
* existence within the extent (i.e. their inode numbers and
|
|
* inode extent addresses are set) and their initial state
|
|
* (mode and link count are set to zero).
|
|
*
|
|
* if the iag is new, it is not yet on an ag extent free list
|
|
* but will now be placed on this list.
|
|
*
|
|
* if the allocation of the new extent causes the iag to
|
|
* have no free extent, the iag will be removed from the
|
|
* ag extent free list.
|
|
*
|
|
* if the iag has no free backed inodes, it will be placed
|
|
* on the ag free inode list, since the addition of the new
|
|
* extent will now cause it to have free inodes.
|
|
*
|
|
* a careful update approach is used to provide consistency
|
|
* (i.e. list consistency) in the face of updates to multiple
|
|
* buffers. under this approach, all required buffers are
|
|
* obtained before making any updates and are held until all
|
|
* updates are complete.
|
|
*
|
|
* PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on
|
|
* this AG. Must have read lock on imap inode.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* iagp - pointer to iag.
|
|
* extno - extent number.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
|
|
{
|
|
int agno, iagno, fwd, back, freei = 0, sword, rc;
|
|
struct iag *aiagp = NULL, *biagp = NULL, *ciagp = NULL;
|
|
struct metapage *amp, *bmp, *cmp, *dmp;
|
|
struct inode *ipimap;
|
|
s64 blkno, hint;
|
|
int i, j;
|
|
u32 mask;
|
|
ino_t ino;
|
|
struct dinode *dp;
|
|
struct jfs_sb_info *sbi;
|
|
|
|
/* better have free extents.
|
|
*/
|
|
if (!iagp->nfreeexts) {
|
|
jfs_error(imap->im_ipimap->i_sb, "diNewExt: no free extents");
|
|
return -EIO;
|
|
}
|
|
|
|
/* get the inode map inode.
|
|
*/
|
|
ipimap = imap->im_ipimap;
|
|
sbi = JFS_SBI(ipimap->i_sb);
|
|
|
|
amp = bmp = cmp = NULL;
|
|
|
|
/* get the ag and iag numbers for this iag.
|
|
*/
|
|
agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi);
|
|
iagno = le32_to_cpu(iagp->iagnum);
|
|
|
|
/* check if this is the last free extent within the
|
|
* iag. if so, the iag must be removed from the ag
|
|
* free extent list, so get the iags preceeding and
|
|
* following the iag on this list.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(1)) {
|
|
if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) {
|
|
if ((rc = diIAGRead(imap, fwd, &)))
|
|
return (rc);
|
|
aiagp = (struct iag *) amp->data;
|
|
}
|
|
|
|
if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) {
|
|
if ((rc = diIAGRead(imap, back, &bmp)))
|
|
goto error_out;
|
|
biagp = (struct iag *) bmp->data;
|
|
}
|
|
} else {
|
|
/* the iag has free extents. if all extents are free
|
|
* (as is the case for a newly allocated iag), the iag
|
|
* must be added to the ag free extent list, so get
|
|
* the iag at the head of the list in preparation for
|
|
* adding this iag to this list.
|
|
*/
|
|
fwd = back = -1;
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
|
|
if ((fwd = imap->im_agctl[agno].extfree) >= 0) {
|
|
if ((rc = diIAGRead(imap, fwd, &)))
|
|
goto error_out;
|
|
aiagp = (struct iag *) amp->data;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* check if the iag has no free inodes. if so, the iag
|
|
* will have to be added to the ag free inode list, so get
|
|
* the iag at the head of the list in preparation for
|
|
* adding this iag to this list. in doing this, we must
|
|
* check if we already have the iag at the head of
|
|
* the list in hand.
|
|
*/
|
|
if (iagp->nfreeinos == 0) {
|
|
freei = imap->im_agctl[agno].inofree;
|
|
|
|
if (freei >= 0) {
|
|
if (freei == fwd) {
|
|
ciagp = aiagp;
|
|
} else if (freei == back) {
|
|
ciagp = biagp;
|
|
} else {
|
|
if ((rc = diIAGRead(imap, freei, &cmp)))
|
|
goto error_out;
|
|
ciagp = (struct iag *) cmp->data;
|
|
}
|
|
if (ciagp == NULL) {
|
|
jfs_error(imap->im_ipimap->i_sb,
|
|
"diNewExt: ciagp == NULL");
|
|
rc = -EIO;
|
|
goto error_out;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* allocate disk space for the inode extent.
|
|
*/
|
|
if ((extno == 0) || (addressPXD(&iagp->inoext[extno - 1]) == 0))
|
|
hint = ((s64) agno << sbi->bmap->db_agl2size) - 1;
|
|
else
|
|
hint = addressPXD(&iagp->inoext[extno - 1]) +
|
|
lengthPXD(&iagp->inoext[extno - 1]) - 1;
|
|
|
|
if ((rc = dbAlloc(ipimap, hint, (s64) imap->im_nbperiext, &blkno)))
|
|
goto error_out;
|
|
|
|
/* compute the inode number of the first inode within the
|
|
* extent.
|
|
*/
|
|
ino = (iagno << L2INOSPERIAG) + (extno << L2INOSPEREXT);
|
|
|
|
/* initialize the inodes within the newly allocated extent a
|
|
* page at a time.
|
|
*/
|
|
for (i = 0; i < imap->im_nbperiext; i += sbi->nbperpage) {
|
|
/* get a buffer for this page of disk inodes.
|
|
*/
|
|
dmp = get_metapage(ipimap, blkno + i, PSIZE, 1);
|
|
if (dmp == NULL) {
|
|
rc = -EIO;
|
|
goto error_out;
|
|
}
|
|
dp = (struct dinode *) dmp->data;
|
|
|
|
/* initialize the inode number, mode, link count and
|
|
* inode extent address.
|
|
*/
|
|
for (j = 0; j < INOSPERPAGE; j++, dp++, ino++) {
|
|
dp->di_inostamp = cpu_to_le32(sbi->inostamp);
|
|
dp->di_number = cpu_to_le32(ino);
|
|
dp->di_fileset = cpu_to_le32(FILESYSTEM_I);
|
|
dp->di_mode = 0;
|
|
dp->di_nlink = 0;
|
|
PXDaddress(&(dp->di_ixpxd), blkno);
|
|
PXDlength(&(dp->di_ixpxd), imap->im_nbperiext);
|
|
}
|
|
write_metapage(dmp);
|
|
}
|
|
|
|
/* if this is the last free extent within the iag, remove the
|
|
* iag from the ag free extent list.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(1)) {
|
|
if (fwd >= 0)
|
|
aiagp->extfreeback = iagp->extfreeback;
|
|
|
|
if (back >= 0)
|
|
biagp->extfreefwd = iagp->extfreefwd;
|
|
else
|
|
imap->im_agctl[agno].extfree =
|
|
le32_to_cpu(iagp->extfreefwd);
|
|
|
|
iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1);
|
|
} else {
|
|
/* if the iag has all free extents (newly allocated iag),
|
|
* add the iag to the ag free extent list.
|
|
*/
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
|
|
if (fwd >= 0)
|
|
aiagp->extfreeback = cpu_to_le32(iagno);
|
|
|
|
iagp->extfreefwd = cpu_to_le32(fwd);
|
|
iagp->extfreeback = cpu_to_le32(-1);
|
|
imap->im_agctl[agno].extfree = iagno;
|
|
}
|
|
}
|
|
|
|
/* if the iag has no free inodes, add the iag to the
|
|
* ag free inode list.
|
|
*/
|
|
if (iagp->nfreeinos == 0) {
|
|
if (freei >= 0)
|
|
ciagp->inofreeback = cpu_to_le32(iagno);
|
|
|
|
iagp->inofreefwd =
|
|
cpu_to_le32(imap->im_agctl[agno].inofree);
|
|
iagp->inofreeback = cpu_to_le32(-1);
|
|
imap->im_agctl[agno].inofree = iagno;
|
|
}
|
|
|
|
/* initialize the extent descriptor of the extent. */
|
|
PXDlength(&iagp->inoext[extno], imap->im_nbperiext);
|
|
PXDaddress(&iagp->inoext[extno], blkno);
|
|
|
|
/* initialize the working and persistent map of the extent.
|
|
* the working map will be initialized such that
|
|
* it indicates the first inode of the extent is allocated.
|
|
*/
|
|
iagp->wmap[extno] = cpu_to_le32(HIGHORDER);
|
|
iagp->pmap[extno] = 0;
|
|
|
|
/* update the free inode and free extent summary maps
|
|
* for the extent to indicate the extent has free inodes
|
|
* and no longer represents a free extent.
|
|
*/
|
|
sword = extno >> L2EXTSPERSUM;
|
|
mask = HIGHORDER >> (extno & (EXTSPERSUM - 1));
|
|
iagp->extsmap[sword] |= cpu_to_le32(mask);
|
|
iagp->inosmap[sword] &= cpu_to_le32(~mask);
|
|
|
|
/* update the free inode and free extent counts for the
|
|
* iag.
|
|
*/
|
|
iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) +
|
|
(INOSPEREXT - 1));
|
|
iagp->nfreeexts = cpu_to_le32(le32_to_cpu(iagp->nfreeexts) - 1);
|
|
|
|
/* update the free and backed inode counts for the ag.
|
|
*/
|
|
imap->im_agctl[agno].numfree += (INOSPEREXT - 1);
|
|
imap->im_agctl[agno].numinos += INOSPEREXT;
|
|
|
|
/* update the free and backed inode counts for the inode map.
|
|
*/
|
|
atomic_add(INOSPEREXT - 1, &imap->im_numfree);
|
|
atomic_add(INOSPEREXT, &imap->im_numinos);
|
|
|
|
/* write the iags.
|
|
*/
|
|
if (amp)
|
|
write_metapage(amp);
|
|
if (bmp)
|
|
write_metapage(bmp);
|
|
if (cmp)
|
|
write_metapage(cmp);
|
|
|
|
return (0);
|
|
|
|
error_out:
|
|
|
|
/* release the iags.
|
|
*/
|
|
if (amp)
|
|
release_metapage(amp);
|
|
if (bmp)
|
|
release_metapage(bmp);
|
|
if (cmp)
|
|
release_metapage(cmp);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
|
|
/*
|
|
* NAME: diNewIAG(imap,iagnop,agno)
|
|
*
|
|
* FUNCTION: allocate a new iag for an allocation group.
|
|
*
|
|
* first tries to allocate the iag from the inode map
|
|
* iagfree list:
|
|
* if the list has free iags, the head of the list is removed
|
|
* and returned to satisfy the request.
|
|
* if the inode map's iag free list is empty, the inode map
|
|
* is extended to hold a new iag. this new iag is initialized
|
|
* and returned to satisfy the request.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* iagnop - pointer to an iag number set with the number of the
|
|
* newly allocated iag upon successful return.
|
|
* agno - allocation group number.
|
|
* bpp - Buffer pointer to be filled in with new IAG's buffer
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -ENOSPC - insufficient disk resources.
|
|
* -EIO - i/o error.
|
|
*
|
|
* serialization:
|
|
* AG lock held on entry/exit;
|
|
* write lock on the map is held inside;
|
|
* read lock on the map is held on successful completion;
|
|
*
|
|
* note: new iag transaction:
|
|
* . synchronously write iag;
|
|
* . write log of xtree and inode of imap;
|
|
* . commit;
|
|
* . synchronous write of xtree (right to left, bottom to top);
|
|
* . at start of logredo(): init in-memory imap with one additional iag page;
|
|
* . at end of logredo(): re-read imap inode to determine
|
|
* new imap size;
|
|
*/
|
|
static int
|
|
diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
|
|
{
|
|
int rc;
|
|
int iagno, i, xlen;
|
|
struct inode *ipimap;
|
|
struct super_block *sb;
|
|
struct jfs_sb_info *sbi;
|
|
struct metapage *mp;
|
|
struct iag *iagp;
|
|
s64 xaddr = 0;
|
|
s64 blkno;
|
|
tid_t tid;
|
|
#ifdef _STILL_TO_PORT
|
|
xad_t xad;
|
|
#endif /* _STILL_TO_PORT */
|
|
struct inode *iplist[1];
|
|
|
|
/* pick up pointers to the inode map and mount inodes */
|
|
ipimap = imap->im_ipimap;
|
|
sb = ipimap->i_sb;
|
|
sbi = JFS_SBI(sb);
|
|
|
|
/* acquire the free iag lock */
|
|
IAGFREE_LOCK(imap);
|
|
|
|
/* if there are any iags on the inode map free iag list,
|
|
* allocate the iag from the head of the list.
|
|
*/
|
|
if (imap->im_freeiag >= 0) {
|
|
/* pick up the iag number at the head of the list */
|
|
iagno = imap->im_freeiag;
|
|
|
|
/* determine the logical block number of the iag */
|
|
blkno = IAGTOLBLK(iagno, sbi->l2nbperpage);
|
|
} else {
|
|
/* no free iags. the inode map will have to be extented
|
|
* to include a new iag.
|
|
*/
|
|
|
|
/* acquire inode map lock */
|
|
IWRITE_LOCK(ipimap, RDWRLOCK_IMAP);
|
|
|
|
if (ipimap->i_size >> L2PSIZE != imap->im_nextiag + 1) {
|
|
IWRITE_UNLOCK(ipimap);
|
|
IAGFREE_UNLOCK(imap);
|
|
jfs_error(imap->im_ipimap->i_sb,
|
|
"diNewIAG: ipimap->i_size is wrong");
|
|
return -EIO;
|
|
}
|
|
|
|
|
|
/* get the next avaliable iag number */
|
|
iagno = imap->im_nextiag;
|
|
|
|
/* make sure that we have not exceeded the maximum inode
|
|
* number limit.
|
|
*/
|
|
if (iagno > (MAXIAGS - 1)) {
|
|
/* release the inode map lock */
|
|
IWRITE_UNLOCK(ipimap);
|
|
|
|
rc = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* synchronously append new iag page.
|
|
*/
|
|
/* determine the logical address of iag page to append */
|
|
blkno = IAGTOLBLK(iagno, sbi->l2nbperpage);
|
|
|
|
/* Allocate extent for new iag page */
|
|
xlen = sbi->nbperpage;
|
|
if ((rc = dbAlloc(ipimap, 0, (s64) xlen, &xaddr))) {
|
|
/* release the inode map lock */
|
|
IWRITE_UNLOCK(ipimap);
|
|
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* start transaction of update of the inode map
|
|
* addressing structure pointing to the new iag page;
|
|
*/
|
|
tid = txBegin(sb, COMMIT_FORCE);
|
|
mutex_lock(&JFS_IP(ipimap)->commit_mutex);
|
|
|
|
/* update the inode map addressing structure to point to it */
|
|
if ((rc =
|
|
xtInsert(tid, ipimap, 0, blkno, xlen, &xaddr, 0))) {
|
|
txEnd(tid);
|
|
mutex_unlock(&JFS_IP(ipimap)->commit_mutex);
|
|
/* Free the blocks allocated for the iag since it was
|
|
* not successfully added to the inode map
|
|
*/
|
|
dbFree(ipimap, xaddr, (s64) xlen);
|
|
|
|
/* release the inode map lock */
|
|
IWRITE_UNLOCK(ipimap);
|
|
|
|
goto out;
|
|
}
|
|
|
|
/* update the inode map's inode to reflect the extension */
|
|
ipimap->i_size += PSIZE;
|
|
inode_add_bytes(ipimap, PSIZE);
|
|
|
|
/* assign a buffer for the page */
|
|
mp = get_metapage(ipimap, blkno, PSIZE, 0);
|
|
if (!mp) {
|
|
/*
|
|
* This is very unlikely since we just created the
|
|
* extent, but let's try to handle it correctly
|
|
*/
|
|
xtTruncate(tid, ipimap, ipimap->i_size - PSIZE,
|
|
COMMIT_PWMAP);
|
|
|
|
txAbort(tid, 0);
|
|
txEnd(tid);
|
|
|
|
/* release the inode map lock */
|
|
IWRITE_UNLOCK(ipimap);
|
|
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* init the iag */
|
|
memset(iagp, 0, sizeof(struct iag));
|
|
iagp->iagnum = cpu_to_le32(iagno);
|
|
iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1);
|
|
iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1);
|
|
iagp->iagfree = cpu_to_le32(-1);
|
|
iagp->nfreeinos = 0;
|
|
iagp->nfreeexts = cpu_to_le32(EXTSPERIAG);
|
|
|
|
/* initialize the free inode summary map (free extent
|
|
* summary map initialization handled by bzero).
|
|
*/
|
|
for (i = 0; i < SMAPSZ; i++)
|
|
iagp->inosmap[i] = cpu_to_le32(ONES);
|
|
|
|
/*
|
|
* Write and sync the metapage
|
|
*/
|
|
flush_metapage(mp);
|
|
|
|
/*
|
|
* txCommit(COMMIT_FORCE) will synchronously write address
|
|
* index pages and inode after commit in careful update order
|
|
* of address index pages (right to left, bottom up);
|
|
*/
|
|
iplist[0] = ipimap;
|
|
rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
|
|
|
|
txEnd(tid);
|
|
mutex_unlock(&JFS_IP(ipimap)->commit_mutex);
|
|
|
|
duplicateIXtree(sb, blkno, xlen, &xaddr);
|
|
|
|
/* update the next avaliable iag number */
|
|
imap->im_nextiag += 1;
|
|
|
|
/* Add the iag to the iag free list so we don't lose the iag
|
|
* if a failure happens now.
|
|
*/
|
|
imap->im_freeiag = iagno;
|
|
|
|
/* Until we have logredo working, we want the imap inode &
|
|
* control page to be up to date.
|
|
*/
|
|
diSync(ipimap);
|
|
|
|
/* release the inode map lock */
|
|
IWRITE_UNLOCK(ipimap);
|
|
}
|
|
|
|
/* obtain read lock on map */
|
|
IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
|
|
|
|
/* read the iag */
|
|
if ((rc = diIAGRead(imap, iagno, &mp))) {
|
|
IREAD_UNLOCK(ipimap);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
iagp = (struct iag *) mp->data;
|
|
|
|
/* remove the iag from the iag free list */
|
|
imap->im_freeiag = le32_to_cpu(iagp->iagfree);
|
|
iagp->iagfree = cpu_to_le32(-1);
|
|
|
|
/* set the return iag number and buffer pointer */
|
|
*iagnop = iagno;
|
|
*mpp = mp;
|
|
|
|
out:
|
|
/* release the iag free lock */
|
|
IAGFREE_UNLOCK(imap);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* NAME: diIAGRead()
|
|
*
|
|
* FUNCTION: get the buffer for the specified iag within a fileset
|
|
* or aggregate inode map.
|
|
*
|
|
* PARAMETERS:
|
|
* imap - pointer to inode map control structure.
|
|
* iagno - iag number.
|
|
* bpp - point to buffer pointer to be filled in on successful
|
|
* exit.
|
|
*
|
|
* SERIALIZATION:
|
|
* must have read lock on imap inode
|
|
* (When called by diExtendFS, the filesystem is quiesced, therefore
|
|
* the read lock is unnecessary.)
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success.
|
|
* -EIO - i/o error.
|
|
*/
|
|
static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp)
|
|
{
|
|
struct inode *ipimap = imap->im_ipimap;
|
|
s64 blkno;
|
|
|
|
/* compute the logical block number of the iag. */
|
|
blkno = IAGTOLBLK(iagno, JFS_SBI(ipimap->i_sb)->l2nbperpage);
|
|
|
|
/* read the iag. */
|
|
*mpp = read_metapage(ipimap, blkno, PSIZE, 0);
|
|
if (*mpp == NULL) {
|
|
return -EIO;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* NAME: diFindFree()
|
|
*
|
|
* FUNCTION: find the first free bit in a word starting at
|
|
* the specified bit position.
|
|
*
|
|
* PARAMETERS:
|
|
* word - word to be examined.
|
|
* start - starting bit position.
|
|
*
|
|
* RETURN VALUES:
|
|
* bit position of first free bit in the word or 32 if
|
|
* no free bits were found.
|
|
*/
|
|
static int diFindFree(u32 word, int start)
|
|
{
|
|
int bitno;
|
|
assert(start < 32);
|
|
/* scan the word for the first free bit. */
|
|
for (word <<= start, bitno = start; bitno < 32;
|
|
bitno++, word <<= 1) {
|
|
if ((word & HIGHORDER) == 0)
|
|
break;
|
|
}
|
|
return (bitno);
|
|
}
|
|
|
|
/*
|
|
* NAME: diUpdatePMap()
|
|
*
|
|
* FUNCTION: Update the persistent map in an IAG for the allocation or
|
|
* freeing of the specified inode.
|
|
*
|
|
* PRE CONDITIONS: Working map has already been updated for allocate.
|
|
*
|
|
* PARAMETERS:
|
|
* ipimap - Incore inode map inode
|
|
* inum - Number of inode to mark in permanent map
|
|
* is_free - If 'true' indicates inode should be marked freed, otherwise
|
|
* indicates inode should be marked allocated.
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 for success
|
|
*/
|
|
int
|
|
diUpdatePMap(struct inode *ipimap,
|
|
unsigned long inum, bool is_free, struct tblock * tblk)
|
|
{
|
|
int rc;
|
|
struct iag *iagp;
|
|
struct metapage *mp;
|
|
int iagno, ino, extno, bitno;
|
|
struct inomap *imap;
|
|
u32 mask;
|
|
struct jfs_log *log;
|
|
int lsn, difft, diffp;
|
|
unsigned long flags;
|
|
|
|
imap = JFS_IP(ipimap)->i_imap;
|
|
/* get the iag number containing the inode */
|
|
iagno = INOTOIAG(inum);
|
|
/* make sure that the iag is contained within the map */
|
|
if (iagno >= imap->im_nextiag) {
|
|
jfs_error(ipimap->i_sb,
|
|
"diUpdatePMap: the iag is outside the map");
|
|
return -EIO;
|
|
}
|
|
/* read the iag */
|
|
IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
|
|
rc = diIAGRead(imap, iagno, &mp);
|
|
IREAD_UNLOCK(ipimap);
|
|
if (rc)
|
|
return (rc);
|
|
metapage_wait_for_io(mp);
|
|
iagp = (struct iag *) mp->data;
|
|
/* get the inode number and extent number of the inode within
|
|
* the iag and the inode number within the extent.
|
|
*/
|
|
ino = inum & (INOSPERIAG - 1);
|
|
extno = ino >> L2INOSPEREXT;
|
|
bitno = ino & (INOSPEREXT - 1);
|
|
mask = HIGHORDER >> bitno;
|
|
/*
|
|
* mark the inode free in persistent map:
|
|
*/
|
|
if (is_free) {
|
|
/* The inode should have been allocated both in working
|
|
* map and in persistent map;
|
|
* the inode will be freed from working map at the release
|
|
* of last reference release;
|
|
*/
|
|
if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) {
|
|
jfs_error(ipimap->i_sb,
|
|
"diUpdatePMap: inode %ld not marked as "
|
|
"allocated in wmap!", inum);
|
|
}
|
|
if (!(le32_to_cpu(iagp->pmap[extno]) & mask)) {
|
|
jfs_error(ipimap->i_sb,
|
|
"diUpdatePMap: inode %ld not marked as "
|
|
"allocated in pmap!", inum);
|
|
}
|
|
/* update the bitmap for the extent of the freed inode */
|
|
iagp->pmap[extno] &= cpu_to_le32(~mask);
|
|
}
|
|
/*
|
|
* mark the inode allocated in persistent map:
|
|
*/
|
|
else {
|
|
/* The inode should be already allocated in the working map
|
|
* and should be free in persistent map;
|
|
*/
|
|
if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) {
|
|
release_metapage(mp);
|
|
jfs_error(ipimap->i_sb,
|
|
"diUpdatePMap: the inode is not allocated in "
|
|
"the working map");
|
|
return -EIO;
|
|
}
|
|
if ((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) {
|
|
release_metapage(mp);
|
|
jfs_error(ipimap->i_sb,
|
|
"diUpdatePMap: the inode is not free in the "
|
|
"persistent map");
|
|
return -EIO;
|
|
}
|
|
/* update the bitmap for the extent of the allocated inode */
|
|
iagp->pmap[extno] |= cpu_to_le32(mask);
|
|
}
|
|
/*
|
|
* update iag lsn
|
|
*/
|
|
lsn = tblk->lsn;
|
|
log = JFS_SBI(tblk->sb)->log;
|
|
LOGSYNC_LOCK(log, flags);
|
|
if (mp->lsn != 0) {
|
|
/* inherit older/smaller lsn */
|
|
logdiff(difft, lsn, log);
|
|
logdiff(diffp, mp->lsn, log);
|
|
if (difft < diffp) {
|
|
mp->lsn = lsn;
|
|
/* move mp after tblock in logsync list */
|
|
list_move(&mp->synclist, &tblk->synclist);
|
|
}
|
|
/* inherit younger/larger clsn */
|
|
assert(mp->clsn);
|
|
logdiff(difft, tblk->clsn, log);
|
|
logdiff(diffp, mp->clsn, log);
|
|
if (difft > diffp)
|
|
mp->clsn = tblk->clsn;
|
|
} else {
|
|
mp->log = log;
|
|
mp->lsn = lsn;
|
|
/* insert mp after tblock in logsync list */
|
|
log->count++;
|
|
list_add(&mp->synclist, &tblk->synclist);
|
|
mp->clsn = tblk->clsn;
|
|
}
|
|
LOGSYNC_UNLOCK(log, flags);
|
|
write_metapage(mp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* diExtendFS()
|
|
*
|
|
* function: update imap for extendfs();
|
|
*
|
|
* note: AG size has been increased s.t. each k old contiguous AGs are
|
|
* coalesced into a new AG;
|
|
*/
|
|
int diExtendFS(struct inode *ipimap, struct inode *ipbmap)
|
|
{
|
|
int rc, rcx = 0;
|
|
struct inomap *imap = JFS_IP(ipimap)->i_imap;
|
|
struct iag *iagp = NULL, *hiagp = NULL;
|
|
struct bmap *mp = JFS_SBI(ipbmap->i_sb)->bmap;
|
|
struct metapage *bp, *hbp;
|
|
int i, n, head;
|
|
int numinos, xnuminos = 0, xnumfree = 0;
|
|
s64 agstart;
|
|
|
|
jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d",
|
|
imap->im_nextiag, atomic_read(&imap->im_numinos),
|
|
atomic_read(&imap->im_numfree));
|
|
|
|
/*
|
|
* reconstruct imap
|
|
*
|
|
* coalesce contiguous k (newAGSize/oldAGSize) AGs;
|
|
* i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn;
|
|
* note: new AG size = old AG size * (2**x).
|
|
*/
|
|
|
|
/* init per AG control information im_agctl[] */
|
|
for (i = 0; i < MAXAG; i++) {
|
|
imap->im_agctl[i].inofree = -1;
|
|
imap->im_agctl[i].extfree = -1;
|
|
imap->im_agctl[i].numinos = 0; /* number of backed inodes */
|
|
imap->im_agctl[i].numfree = 0; /* number of free backed inodes */
|
|
}
|
|
|
|
/*
|
|
* process each iag page of the map.
|
|
*
|
|
* rebuild AG Free Inode List, AG Free Inode Extent List;
|
|
*/
|
|
for (i = 0; i < imap->im_nextiag; i++) {
|
|
if ((rc = diIAGRead(imap, i, &bp))) {
|
|
rcx = rc;
|
|
continue;
|
|
}
|
|
iagp = (struct iag *) bp->data;
|
|
if (le32_to_cpu(iagp->iagnum) != i) {
|
|
release_metapage(bp);
|
|
jfs_error(ipimap->i_sb,
|
|
"diExtendFs: unexpected value of iagnum");
|
|
return -EIO;
|
|
}
|
|
|
|
/* leave free iag in the free iag list */
|
|
if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
|
|
release_metapage(bp);
|
|
continue;
|
|
}
|
|
|
|
/* agstart that computes to the same ag is treated as same; */
|
|
agstart = le64_to_cpu(iagp->agstart);
|
|
/* iagp->agstart = agstart & ~(mp->db_agsize - 1); */
|
|
n = agstart >> mp->db_agl2size;
|
|
|
|
/* compute backed inodes */
|
|
numinos = (EXTSPERIAG - le32_to_cpu(iagp->nfreeexts))
|
|
<< L2INOSPEREXT;
|
|
if (numinos > 0) {
|
|
/* merge AG backed inodes */
|
|
imap->im_agctl[n].numinos += numinos;
|
|
xnuminos += numinos;
|
|
}
|
|
|
|
/* if any backed free inodes, insert at AG free inode list */
|
|
if ((int) le32_to_cpu(iagp->nfreeinos) > 0) {
|
|
if ((head = imap->im_agctl[n].inofree) == -1) {
|
|
iagp->inofreefwd = cpu_to_le32(-1);
|
|
iagp->inofreeback = cpu_to_le32(-1);
|
|
} else {
|
|
if ((rc = diIAGRead(imap, head, &hbp))) {
|
|
rcx = rc;
|
|
goto nextiag;
|
|
}
|
|
hiagp = (struct iag *) hbp->data;
|
|
hiagp->inofreeback = iagp->iagnum;
|
|
iagp->inofreefwd = cpu_to_le32(head);
|
|
iagp->inofreeback = cpu_to_le32(-1);
|
|
write_metapage(hbp);
|
|
}
|
|
|
|
imap->im_agctl[n].inofree =
|
|
le32_to_cpu(iagp->iagnum);
|
|
|
|
/* merge AG backed free inodes */
|
|
imap->im_agctl[n].numfree +=
|
|
le32_to_cpu(iagp->nfreeinos);
|
|
xnumfree += le32_to_cpu(iagp->nfreeinos);
|
|
}
|
|
|
|
/* if any free extents, insert at AG free extent list */
|
|
if (le32_to_cpu(iagp->nfreeexts) > 0) {
|
|
if ((head = imap->im_agctl[n].extfree) == -1) {
|
|
iagp->extfreefwd = cpu_to_le32(-1);
|
|
iagp->extfreeback = cpu_to_le32(-1);
|
|
} else {
|
|
if ((rc = diIAGRead(imap, head, &hbp))) {
|
|
rcx = rc;
|
|
goto nextiag;
|
|
}
|
|
hiagp = (struct iag *) hbp->data;
|
|
hiagp->extfreeback = iagp->iagnum;
|
|
iagp->extfreefwd = cpu_to_le32(head);
|
|
iagp->extfreeback = cpu_to_le32(-1);
|
|
write_metapage(hbp);
|
|
}
|
|
|
|
imap->im_agctl[n].extfree =
|
|
le32_to_cpu(iagp->iagnum);
|
|
}
|
|
|
|
nextiag:
|
|
write_metapage(bp);
|
|
}
|
|
|
|
if (xnuminos != atomic_read(&imap->im_numinos) ||
|
|
xnumfree != atomic_read(&imap->im_numfree)) {
|
|
jfs_error(ipimap->i_sb,
|
|
"diExtendFs: numinos or numfree incorrect");
|
|
return -EIO;
|
|
}
|
|
|
|
return rcx;
|
|
}
|
|
|
|
|
|
/*
|
|
* duplicateIXtree()
|
|
*
|
|
* serialization: IWRITE_LOCK held on entry/exit
|
|
*
|
|
* note: shadow page with regular inode (rel.2);
|
|
*/
|
|
static void duplicateIXtree(struct super_block *sb, s64 blkno,
|
|
int xlen, s64 *xaddr)
|
|
{
|
|
struct jfs_superblock *j_sb;
|
|
struct buffer_head *bh;
|
|
struct inode *ip;
|
|
tid_t tid;
|
|
|
|
/* if AIT2 ipmap2 is bad, do not try to update it */
|
|
if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT) /* s_flag */
|
|
return;
|
|
ip = diReadSpecial(sb, FILESYSTEM_I, 1);
|
|
if (ip == NULL) {
|
|
JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
|
|
if (readSuper(sb, &bh))
|
|
return;
|
|
j_sb = (struct jfs_superblock *)bh->b_data;
|
|
j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);
|
|
|
|
mark_buffer_dirty(bh);
|
|
sync_dirty_buffer(bh);
|
|
brelse(bh);
|
|
return;
|
|
}
|
|
|
|
/* start transaction */
|
|
tid = txBegin(sb, COMMIT_FORCE);
|
|
/* update the inode map addressing structure to point to it */
|
|
if (xtInsert(tid, ip, 0, blkno, xlen, xaddr, 0)) {
|
|
JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
|
|
txAbort(tid, 1);
|
|
goto cleanup;
|
|
|
|
}
|
|
/* update the inode map's inode to reflect the extension */
|
|
ip->i_size += PSIZE;
|
|
inode_add_bytes(ip, PSIZE);
|
|
txCommit(tid, 1, &ip, COMMIT_FORCE);
|
|
cleanup:
|
|
txEnd(tid);
|
|
diFreeSpecial(ip);
|
|
}
|
|
|
|
/*
|
|
* NAME: copy_from_dinode()
|
|
*
|
|
* FUNCTION: Copies inode info from disk inode to in-memory inode
|
|
*
|
|
* RETURN VALUES:
|
|
* 0 - success
|
|
* -ENOMEM - insufficient memory
|
|
*/
|
|
static int copy_from_dinode(struct dinode * dip, struct inode *ip)
|
|
{
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
|
|
|
|
jfs_ip->fileset = le32_to_cpu(dip->di_fileset);
|
|
jfs_ip->mode2 = le32_to_cpu(dip->di_mode);
|
|
|
|
ip->i_mode = le32_to_cpu(dip->di_mode) & 0xffff;
|
|
if (sbi->umask != -1) {
|
|
ip->i_mode = (ip->i_mode & ~0777) | (0777 & ~sbi->umask);
|
|
/* For directories, add x permission if r is allowed by umask */
|
|
if (S_ISDIR(ip->i_mode)) {
|
|
if (ip->i_mode & 0400)
|
|
ip->i_mode |= 0100;
|
|
if (ip->i_mode & 0040)
|
|
ip->i_mode |= 0010;
|
|
if (ip->i_mode & 0004)
|
|
ip->i_mode |= 0001;
|
|
}
|
|
}
|
|
ip->i_nlink = le32_to_cpu(dip->di_nlink);
|
|
|
|
jfs_ip->saved_uid = le32_to_cpu(dip->di_uid);
|
|
if (sbi->uid == -1)
|
|
ip->i_uid = jfs_ip->saved_uid;
|
|
else {
|
|
ip->i_uid = sbi->uid;
|
|
}
|
|
|
|
jfs_ip->saved_gid = le32_to_cpu(dip->di_gid);
|
|
if (sbi->gid == -1)
|
|
ip->i_gid = jfs_ip->saved_gid;
|
|
else {
|
|
ip->i_gid = sbi->gid;
|
|
}
|
|
|
|
ip->i_size = le64_to_cpu(dip->di_size);
|
|
ip->i_atime.tv_sec = le32_to_cpu(dip->di_atime.tv_sec);
|
|
ip->i_atime.tv_nsec = le32_to_cpu(dip->di_atime.tv_nsec);
|
|
ip->i_mtime.tv_sec = le32_to_cpu(dip->di_mtime.tv_sec);
|
|
ip->i_mtime.tv_nsec = le32_to_cpu(dip->di_mtime.tv_nsec);
|
|
ip->i_ctime.tv_sec = le32_to_cpu(dip->di_ctime.tv_sec);
|
|
ip->i_ctime.tv_nsec = le32_to_cpu(dip->di_ctime.tv_nsec);
|
|
ip->i_blocks = LBLK2PBLK(ip->i_sb, le64_to_cpu(dip->di_nblocks));
|
|
ip->i_generation = le32_to_cpu(dip->di_gen);
|
|
|
|
jfs_ip->ixpxd = dip->di_ixpxd; /* in-memory pxd's are little-endian */
|
|
jfs_ip->acl = dip->di_acl; /* as are dxd's */
|
|
jfs_ip->ea = dip->di_ea;
|
|
jfs_ip->next_index = le32_to_cpu(dip->di_next_index);
|
|
jfs_ip->otime = le32_to_cpu(dip->di_otime.tv_sec);
|
|
jfs_ip->acltype = le32_to_cpu(dip->di_acltype);
|
|
|
|
if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) {
|
|
jfs_ip->dev = le32_to_cpu(dip->di_rdev);
|
|
ip->i_rdev = new_decode_dev(jfs_ip->dev);
|
|
}
|
|
|
|
if (S_ISDIR(ip->i_mode)) {
|
|
memcpy(&jfs_ip->i_dirtable, &dip->di_dirtable, 384);
|
|
} else if (S_ISREG(ip->i_mode) || S_ISLNK(ip->i_mode)) {
|
|
memcpy(&jfs_ip->i_xtroot, &dip->di_xtroot, 288);
|
|
} else
|
|
memcpy(&jfs_ip->i_inline_ea, &dip->di_inlineea, 128);
|
|
|
|
/* Zero the in-memory-only stuff */
|
|
jfs_ip->cflag = 0;
|
|
jfs_ip->btindex = 0;
|
|
jfs_ip->btorder = 0;
|
|
jfs_ip->bxflag = 0;
|
|
jfs_ip->blid = 0;
|
|
jfs_ip->atlhead = 0;
|
|
jfs_ip->atltail = 0;
|
|
jfs_ip->xtlid = 0;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* NAME: copy_to_dinode()
|
|
*
|
|
* FUNCTION: Copies inode info from in-memory inode to disk inode
|
|
*/
|
|
static void copy_to_dinode(struct dinode * dip, struct inode *ip)
|
|
{
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
|
|
|
|
dip->di_fileset = cpu_to_le32(jfs_ip->fileset);
|
|
dip->di_inostamp = cpu_to_le32(sbi->inostamp);
|
|
dip->di_number = cpu_to_le32(ip->i_ino);
|
|
dip->di_gen = cpu_to_le32(ip->i_generation);
|
|
dip->di_size = cpu_to_le64(ip->i_size);
|
|
dip->di_nblocks = cpu_to_le64(PBLK2LBLK(ip->i_sb, ip->i_blocks));
|
|
dip->di_nlink = cpu_to_le32(ip->i_nlink);
|
|
if (sbi->uid == -1)
|
|
dip->di_uid = cpu_to_le32(ip->i_uid);
|
|
else
|
|
dip->di_uid = cpu_to_le32(jfs_ip->saved_uid);
|
|
if (sbi->gid == -1)
|
|
dip->di_gid = cpu_to_le32(ip->i_gid);
|
|
else
|
|
dip->di_gid = cpu_to_le32(jfs_ip->saved_gid);
|
|
/*
|
|
* mode2 is only needed for storing the higher order bits.
|
|
* Trust i_mode for the lower order ones
|
|
*/
|
|
if (sbi->umask == -1)
|
|
dip->di_mode = cpu_to_le32((jfs_ip->mode2 & 0xffff0000) |
|
|
ip->i_mode);
|
|
else /* Leave the original permissions alone */
|
|
dip->di_mode = cpu_to_le32(jfs_ip->mode2);
|
|
|
|
dip->di_atime.tv_sec = cpu_to_le32(ip->i_atime.tv_sec);
|
|
dip->di_atime.tv_nsec = cpu_to_le32(ip->i_atime.tv_nsec);
|
|
dip->di_ctime.tv_sec = cpu_to_le32(ip->i_ctime.tv_sec);
|
|
dip->di_ctime.tv_nsec = cpu_to_le32(ip->i_ctime.tv_nsec);
|
|
dip->di_mtime.tv_sec = cpu_to_le32(ip->i_mtime.tv_sec);
|
|
dip->di_mtime.tv_nsec = cpu_to_le32(ip->i_mtime.tv_nsec);
|
|
dip->di_ixpxd = jfs_ip->ixpxd; /* in-memory pxd's are little-endian */
|
|
dip->di_acl = jfs_ip->acl; /* as are dxd's */
|
|
dip->di_ea = jfs_ip->ea;
|
|
dip->di_next_index = cpu_to_le32(jfs_ip->next_index);
|
|
dip->di_otime.tv_sec = cpu_to_le32(jfs_ip->otime);
|
|
dip->di_otime.tv_nsec = 0;
|
|
dip->di_acltype = cpu_to_le32(jfs_ip->acltype);
|
|
if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode))
|
|
dip->di_rdev = cpu_to_le32(jfs_ip->dev);
|
|
}
|