diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/jfs/jfs_imap.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/jfs/jfs_imap.c | 3187 |
1 files changed, 0 insertions, 3187 deletions
diff --git a/ANDROID_3.4.5/fs/jfs/jfs_imap.c b/ANDROID_3.4.5/fs/jfs/jfs_imap.c deleted file mode 100644 index 1b6f15f1..00000000 --- a/ANDROID_3.4.5/fs/jfs/jfs_imap.c +++ /dev/null @@ -1,3187 +0,0 @@ -/* - * 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, "diRead: i_ino != di_number"); - 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, "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) - 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, - "diFree: inum = %d, iagno = %d, nextiag = %d", - (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, - "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. - */ - 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, "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. - */ - 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 = 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 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, - "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 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, - "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. - */ - 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, "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 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, - "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. - */ - 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, - "diNewIAG: ipimap->i_size is wrong"); - 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, - "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 = 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, - "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); - 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 = 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); - 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); -} |