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- /*
- * Copyright (C) International Business Machines Corp., 2000-2004
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- /*
- * jfs_imap.c: inode allocation map manager
- *
- * Serialization:
- * Each AG has a simple lock which is used to control the serialization of
- * the AG level lists. This lock should be taken first whenever an AG
- * level list will be modified or accessed.
- *
- * Each IAG is locked by obtaining the buffer for the IAG page.
- *
- * There is also a inode lock for the inode map inode. A read lock needs to
- * be taken whenever an IAG is read from the map or the global level
- * information is read. A write lock needs to be taken whenever the global
- * level information is modified or an atomic operation needs to be used.
- *
- * If more than one IAG is read at one time, the read lock may not
- * be given up until all of the IAG's are read. Otherwise, a deadlock
- * may occur when trying to obtain the read lock while another thread
- * holding the read lock is waiting on the IAG already being held.
- *
- * The control page of the inode map is read into memory by diMount().
- * Thereafter it should only be modified in memory and then it will be
- * written out when the filesystem is unmounted by diUnmount().
- */
- #include <linux/fs.h>
- #include <linux/buffer_head.h>
- #include <linux/pagemap.h>
- #include <linux/quotaops.h>
- #include <linux/slab.h>
- #include "jfs_incore.h"
- #include "jfs_inode.h"
- #include "jfs_filsys.h"
- #include "jfs_dinode.h"
- #include "jfs_dmap.h"
- #include "jfs_imap.h"
- #include "jfs_metapage.h"
- #include "jfs_superblock.h"
- #include "jfs_debug.h"
- /*
- * imap locks
- */
- /* iag free list lock */
- #define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock)
- #define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock)
- #define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock)
- /* per ag iag list locks */
- #define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index]))
- #define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno])
- #define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno])
- /*
- * forward references
- */
- static int diAllocAG(struct inomap *, int, bool, struct inode *);
- static int diAllocAny(struct inomap *, int, bool, struct inode *);
- static int diAllocBit(struct inomap *, struct iag *, int);
- static int diAllocExt(struct inomap *, int, struct inode *);
- static int diAllocIno(struct inomap *, int, struct inode *);
- static int diFindFree(u32, int);
- static int diNewExt(struct inomap *, struct iag *, int);
- static int diNewIAG(struct inomap *, int *, int, struct metapage **);
- static void duplicateIXtree(struct super_block *, s64, int, s64 *);
- static int diIAGRead(struct inomap * imap, int, struct metapage **);
- static int copy_from_dinode(struct dinode *, struct inode *);
- static void copy_to_dinode(struct dinode *, struct inode *);
- /*
- * NAME: diMount()
- *
- * FUNCTION: initialize the incore inode map control structures for
- * a fileset or aggregate init time.
- *
- * the inode map's control structure (dinomap) is
- * brought in from disk and placed in virtual memory.
- *
- * PARAMETERS:
- * ipimap - pointer to inode map inode for the aggregate or fileset.
- *
- * RETURN VALUES:
- * 0 - success
- * -ENOMEM - insufficient free virtual memory.
- * -EIO - i/o error.
- */
- int diMount(struct inode *ipimap)
- {
- struct inomap *imap;
- struct metapage *mp;
- int index;
- struct dinomap_disk *dinom_le;
- /*
- * allocate/initialize the in-memory inode map control structure
- */
- /* allocate the in-memory inode map control structure. */
- imap = kmalloc(sizeof(struct inomap), GFP_KERNEL);
- if (imap == NULL) {
- jfs_err("diMount: kmalloc returned NULL!");
- return -ENOMEM;
- }
- /* read the on-disk inode map control structure. */
- mp = read_metapage(ipimap,
- IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
- PSIZE, 0);
- if (mp == NULL) {
- kfree(imap);
- return -EIO;
- }
- /* copy the on-disk version to the in-memory version. */
- dinom_le = (struct dinomap_disk *) mp->data;
- imap->im_freeiag = le32_to_cpu(dinom_le->in_freeiag);
- imap->im_nextiag = le32_to_cpu(dinom_le->in_nextiag);
- atomic_set(&imap->im_numinos, le32_to_cpu(dinom_le->in_numinos));
- atomic_set(&imap->im_numfree, le32_to_cpu(dinom_le->in_numfree));
- imap->im_nbperiext = le32_to_cpu(dinom_le->in_nbperiext);
- imap->im_l2nbperiext = le32_to_cpu(dinom_le->in_l2nbperiext);
- for (index = 0; index < MAXAG; index++) {
- imap->im_agctl[index].inofree =
- le32_to_cpu(dinom_le->in_agctl[index].inofree);
- imap->im_agctl[index].extfree =
- le32_to_cpu(dinom_le->in_agctl[index].extfree);
- imap->im_agctl[index].numinos =
- le32_to_cpu(dinom_le->in_agctl[index].numinos);
- imap->im_agctl[index].numfree =
- le32_to_cpu(dinom_le->in_agctl[index].numfree);
- }
- /* release the buffer. */
- release_metapage(mp);
- /*
- * allocate/initialize inode allocation map locks
- */
- /* allocate and init iag free list lock */
- IAGFREE_LOCK_INIT(imap);
- /* allocate and init ag list locks */
- for (index = 0; index < MAXAG; index++) {
- AG_LOCK_INIT(imap, index);
- }
- /* bind the inode map inode and inode map control structure
- * to each other.
- */
- imap->im_ipimap = ipimap;
- JFS_IP(ipimap)->i_imap = imap;
- return (0);
- }
- /*
- * NAME: diUnmount()
- *
- * FUNCTION: write to disk the incore inode map control structures for
- * a fileset or aggregate at unmount time.
- *
- * PARAMETERS:
- * ipimap - pointer to inode map inode for the aggregate or fileset.
- *
- * RETURN VALUES:
- * 0 - success
- * -ENOMEM - insufficient free virtual memory.
- * -EIO - i/o error.
- */
- int diUnmount(struct inode *ipimap, int mounterror)
- {
- struct inomap *imap = JFS_IP(ipimap)->i_imap;
- /*
- * update the on-disk inode map control structure
- */
- if (!(mounterror || isReadOnly(ipimap)))
- diSync(ipimap);
- /*
- * Invalidate the page cache buffers
- */
- truncate_inode_pages(ipimap->i_mapping, 0);
- /*
- * free in-memory control structure
- */
- kfree(imap);
- return (0);
- }
- /*
- * diSync()
- */
- int diSync(struct inode *ipimap)
- {
- struct dinomap_disk *dinom_le;
- struct inomap *imp = JFS_IP(ipimap)->i_imap;
- struct metapage *mp;
- int index;
- /*
- * write imap global conrol page
- */
- /* read the on-disk inode map control structure */
- mp = get_metapage(ipimap,
- IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
- PSIZE, 0);
- if (mp == NULL) {
- jfs_err("diSync: get_metapage failed!");
- return -EIO;
- }
- /* copy the in-memory version to the on-disk version */
- dinom_le = (struct dinomap_disk *) mp->data;
- dinom_le->in_freeiag = cpu_to_le32(imp->im_freeiag);
- dinom_le->in_nextiag = cpu_to_le32(imp->im_nextiag);
- dinom_le->in_numinos = cpu_to_le32(atomic_read(&imp->im_numinos));
- dinom_le->in_numfree = cpu_to_le32(atomic_read(&imp->im_numfree));
- dinom_le->in_nbperiext = cpu_to_le32(imp->im_nbperiext);
- dinom_le->in_l2nbperiext = cpu_to_le32(imp->im_l2nbperiext);
- for (index = 0; index < MAXAG; index++) {
- dinom_le->in_agctl[index].inofree =
- cpu_to_le32(imp->im_agctl[index].inofree);
- dinom_le->in_agctl[index].extfree =
- cpu_to_le32(imp->im_agctl[index].extfree);
- dinom_le->in_agctl[index].numinos =
- cpu_to_le32(imp->im_agctl[index].numinos);
- dinom_le->in_agctl[index].numfree =
- cpu_to_le32(imp->im_agctl[index].numfree);
- }
- /* write out the control structure */
- write_metapage(mp);
- /*
- * write out dirty pages of imap
- */
- filemap_write_and_wait(ipimap->i_mapping);
- diWriteSpecial(ipimap, 0);
- return (0);
- }
- /*
- * NAME: diRead()
- *
- * FUNCTION: initialize an incore inode from disk.
- *
- * 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).
- *
- * this routine handles incore inode initialization for
- * both "special" and "regular" inodes. special inodes
- * are those required early in the mount process and
- * require special handling since much of the file system
- * is not yet initialized. these "special" inodes are
- * identified by a NULL inode map inode pointer and are
- * actually initialized by a call to diReadSpecial().
- *
- * for regular inodes, the iag describing the disk inode
- * is read from disk to determine 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 is copied to the
- * incore inode.
- *
- * PARAMETERS:
- * ip - pointer to incore inode to be initialized from disk.
- *
- * RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOMEM - insufficient memory
- *
- */
- int diRead(struct inode *ip)
- {
- struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
- int iagno, ino, extno, rc;
- struct inode *ipimap;
- struct dinode *dp;
- struct iag *iagp;
- struct metapage *mp;
- s64 blkno, agstart;
- struct inomap *imap;
- int block_offset;
- int inodes_left;
- unsigned long pageno;
- int rel_inode;
- jfs_info("diRead: ino = %ld", ip->i_ino);
- ipimap = sbi->ipimap;
- JFS_IP(ip)->ipimap = ipimap;
- /* determine the iag number for this inode (number) */
- iagno = INOTOIAG(ip->i_ino);
- /* read the iag */
- imap = JFS_IP(ipimap)->i_imap;
- IREAD_LOCK(ipimap, RDWRLOCK_IMAP);
- rc = diIAGRead(imap, iagno, &mp);
- IREAD_UNLOCK(ipimap);
- if (rc) {
- jfs_err("diRead: diIAGRead returned %d", rc);
- return (rc);
- }
- iagp = (struct iag *) mp->data;
- /* determine inode extent that holds the disk inode */
- ino = ip->i_ino & (INOSPERIAG - 1);
- extno = ino >> L2INOSPEREXT;
- if ((lengthPXD(&iagp->inoext[extno]) != imap->im_nbperiext) ||
- (addressPXD(&iagp->inoext[extno]) == 0)) {
- release_metapage(mp);
- return -ESTALE;
- }
- /* get disk block number of the page within the inode extent
- * that holds the disk inode.
- */
- blkno = INOPBLK(&iagp->inoext[extno], ino, sbi->l2nbperpage);
- /* get the ag for the iag */
- agstart = le64_to_cpu(iagp->agstart);
- release_metapage(mp);
- 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 */
- mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1);
- if (!mp) {
- jfs_err("diRead: read_metapage failed");
- return -EIO;
- }
- /* locate the disk inode requested */
- dp = (struct dinode *) mp->data;
- dp += rel_inode;
- if (ip->i_ino != le32_to_cpu(dp->di_number)) {
- jfs_error(ip->i_sb, "i_ino != di_number\n");
- rc = -EIO;
- } else if (le32_to_cpu(dp->di_nlink) == 0)
- rc = -ESTALE;
- else
- /* copy the disk inode to the in-memory inode */
- rc = copy_from_dinode(dp, ip);
- release_metapage(mp);
- /* set the ag for the inode */
- JFS_IP(ip)->agstart = agstart;
- JFS_IP(ip)->active_ag = -1;
- return (rc);
- }
- /*
- * NAME: diReadSpecial()
- *
- * FUNCTION: initialize a 'special' inode from disk.
- *
- * this routines handles aggregate level inodes. The
- * inode cache cannot differentiate between the
- * aggregate inodes and the filesystem inodes, so we
- * handle these here. We don't actually use the aggregate
- * inode map, since these inodes are at a fixed location
- * and in some cases the aggregate inode map isn't initialized
- * yet.
- *
- * PARAMETERS:
- * sb - filesystem superblock
- * inum - aggregate inode number
- * secondary - 1 if secondary aggregate inode table
- *
- * RETURN VALUES:
- * new inode - success
- * NULL - i/o error.
- */
- struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
- {
- struct jfs_sb_info *sbi = JFS_SBI(sb);
- uint address;
- struct dinode *dp;
- struct inode *ip;
- struct metapage *mp;
- ip = new_inode(sb);
- if (ip == NULL) {
- jfs_err("diReadSpecial: new_inode returned NULL!");
- return ip;
- }
- if (secondary) {
- address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage;
- JFS_IP(ip)->ipimap = sbi->ipaimap2;
- } else {
- address = AITBL_OFF >> L2PSIZE;
- JFS_IP(ip)->ipimap = sbi->ipaimap;
- }
- ASSERT(inum < INOSPEREXT);
- ip->i_ino = inum;
- 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) {
- set_nlink(ip, 1); /* Don't want iput() deleting it */
- iput(ip);
- return (NULL);
- }
- /* 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 */
- if ((copy_from_dinode(dp, ip)) != 0) {
- /* handle bad return by returning NULL for ip */
- set_nlink(ip, 1); /* Don't want iput() deleting it */
- iput(ip);
- /* release the page */
- release_metapage(mp);
- return (NULL);
- }
- ip->i_mapping->a_ops = &jfs_metapage_aops;
- mapping_set_gfp_mask(ip->i_mapping, GFP_NOFS);
- /* Allocations to metadata inodes should not affect quotas */
- ip->i_flags |= S_NOQUOTA;
- 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);
- /*
- * __mark_inode_dirty expects inodes to be hashed. Since we don't
- * want special inodes in the fileset inode space, we make them
- * appear hashed, but do not put on any lists. hlist_del()
- * will work fine and require no locking.
- */
- hlist_add_fake(&ip->i_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, "ixpxd invalid\n");
- 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)
- 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
- */
- 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++;
- /* 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) {
- print_hex_dump(KERN_ERR, "imap: ", DUMP_PREFIX_ADDRESS, 16, 4,
- imap, 32, 0);
- jfs_error(ip->i_sb, "inum = %d, iagno = %d, nextiag = %d\n",
- (uint) inum, iagno, imap->im_nextiag);
- return -EIO;
- }
- /* get the allocation group for this ino.
- */
- agno = BLKTOAG(JFS_IP(ip)->agstart, JFS_SBI(ip->i_sb));
- /* 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, "wmap shows inode already free\n");
- }
- if (!addressPXD(&iagp->inoext[extno])) {
- release_metapage(mp);
- IREAD_UNLOCK(ipimap);
- AG_UNLOCK(imap, agno);
- jfs_error(ip->i_sb, "invalid inoext\n");
- 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, "numfree > numinos\n");
- 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.
- */
- le32_add_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 preceding
- * 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 preceding
- * 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, "the pmap does not show inode free\n");
- }
- 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.
- */
- le32_add_cpu(&iagp->nfreeinos, -(INOSPEREXT - 1));
- le32_add_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_inode_info *jfs_ip = JFS_IP(ip);
- ip->i_ino = (iagno << L2INOSPERIAG) + ino;
- jfs_ip->ixpxd = iagp->inoext[extno];
- jfs_ip->agstart = le64_to_cpu(iagp->agstart);
- 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 = BLKTOAG(JFS_IP(pip)->agstart, JFS_SBI(pip->i_sb));
- 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 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 = (bitno == 0) ? 0 : (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,
- "can't find free bit in wmap\n");
- 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, "numfree > numinos\n");
- 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 available 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, "nfreeinos = 0, but iag on freelist\n");
- 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,
- "free inode not found in summary map\n");
- 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, "no free extent found\n");
- 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, "free inode not found\n");
- 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, "error reading iag\n");
- 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, "free ext summary map not found\n");
- 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, "free extent not found\n");
- 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 preceding 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, "iag inconsistent\n");
- 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.
- */
- le32_add_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, "no free extents\n");
- 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 preceding 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,
- "ciagp == NULL\n");
- 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.
- */
- le32_add_cpu(&iagp->nfreeinos, (INOSPEREXT - 1));
- le32_add_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;
- 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,
- "ipimap->i_size is wrong\n");
- return -EIO;
- }
- /* get the next available 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);
- mutex_unlock(&JFS_IP(ipimap)->commit_mutex);
- /* 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 available 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, "the iag is outside the map\n");
- 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,
- "inode %ld not marked as allocated in wmap!\n",
- inum);
- }
- if (!(le32_to_cpu(iagp->pmap[extno]) & mask)) {
- jfs_error(ipimap->i_sb,
- "inode %ld not marked as allocated in pmap!\n",
- 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,
- "the inode is not allocated in the working map\n");
- return -EIO;
- }
- if ((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) {
- release_metapage(mp);
- jfs_error(ipimap->i_sb,
- "the inode is not free in the persistent map\n");
- 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, "unexpected value of iagnum\n");
- return -EIO;
- }
- /* leave free iag in the free iag list */
- if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
- release_metapage(bp);
- continue;
- }
- agstart = le64_to_cpu(iagp->agstart);
- n = agstart >> mp->db_agl2size;
- iagp->agstart = cpu_to_le64((s64)n << 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, "numinos or numfree incorrect\n");
- 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);
- jfs_set_inode_flags(ip);
- 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;
- }
- }
- set_nlink(ip, le32_to_cpu(dip->di_nlink));
- jfs_ip->saved_uid = make_kuid(&init_user_ns, le32_to_cpu(dip->di_uid));
- if (!uid_valid(sbi->uid))
- ip->i_uid = jfs_ip->saved_uid;
- else {
- ip->i_uid = sbi->uid;
- }
- jfs_ip->saved_gid = make_kgid(&init_user_ns, le32_to_cpu(dip->di_gid));
- if (!gid_valid(sbi->gid))
- 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 (!uid_valid(sbi->uid))
- dip->di_uid = cpu_to_le32(i_uid_read(ip));
- else
- dip->di_uid =cpu_to_le32(from_kuid(&init_user_ns,
- jfs_ip->saved_uid));
- if (!gid_valid(sbi->gid))
- dip->di_gid = cpu_to_le32(i_gid_read(ip));
- else
- dip->di_gid = cpu_to_le32(from_kgid(&init_user_ns,
- jfs_ip->saved_gid));
- jfs_get_inode_flags(jfs_ip);
- /*
- * 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);
- }
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