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Commit e471e594 authored by Dave Kleikamp's avatar Dave Kleikamp
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fs/jfs: Remove dead code 

Since the JFS code was first added to Linux, there has been code hidden
in ifdefs  for some potential future features such as defragmentation
and supporting block sizes other than 4KB. There has been no ongoing
development on JFS for many years, so it's past time to remove this dead
code from the source.
Signed-off-by: default avatarDave Kleikamp <dave.kleikamp@oracle.com>
parent 0d4837fd
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Showing with 1 addition and 1651 deletions
fs/jfs/Makefile
View file @ e471e594
......@@ -13,5 +13,3 @@ jfs-y := super.o file.o inode.o namei.o jfs_mount.o jfs_umount.o \
resize.o xattr.o ioctl.o
jfs-$(CONFIG_JFS_POSIX_ACL) += acl.o
ccflags-y := -D_JFS_4K
fs/jfs/inode.c
View file @ e471e594
......@@ -224,18 +224,9 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
* this as a hole
*/
goto unlock;
#ifdef _JFS_4K
XADoffset(&xad, lblock64);
XADlength(&xad, xlen);
XADaddress(&xad, xaddr);
#else /* _JFS_4K */
/*
* As long as block size = 4K, this isn't a problem.
* We should mark the whole page not ABNR, but how
* will we know to mark the other blocks BH_New?
*/
BUG();
#endif /* _JFS_4K */
rc = extRecord(ip, &xad);
if (rc)
goto unlock;
......@@ -252,7 +243,6 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
/*
* Allocate a new block
*/
#ifdef _JFS_4K
if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
goto unlock;
rc = extAlloc(ip, xlen, lblock64, &xad, false);
......@@ -263,14 +253,6 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
map_bh(bh_result, ip->i_sb, addressXAD(&xad));
bh_result->b_size = lengthXAD(&xad) << ip->i_blkbits;
#else /* _JFS_4K */
/*
* We need to do whatever it takes to keep all but the last buffers
* in 4K pages - see jfs_write.c
*/
BUG();
#endif /* _JFS_4K */
unlock:
/*
* Release lock on inode
......
fs/jfs/jfs_dmap.c
View file @ e471e594
......@@ -869,74 +869,6 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
return (rc);
}
#ifdef _NOTYET
/*
* NAME: dbAllocExact()
*
* FUNCTION: try to allocate the requested extent;
*
* PARAMETERS:
* ip - pointer to in-core inode;
* blkno - extent address;
* nblocks - extent length;
*
* RETURN VALUES:
* 0 - success
* -ENOSPC - insufficient disk resources
* -EIO - i/o error
*/
int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
{
int rc;
struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap;
struct dmap *dp;
s64 lblkno;
struct metapage *mp;
IREAD_LOCK(ipbmap, RDWRLOCK_DMAP);
/*
* validate extent request:
*
* note: defragfs policy:
* max 64 blocks will be moved.
* allocation request size must be satisfied from a single dmap.
*/
if (nblocks <= 0 || nblocks > BPERDMAP || blkno >= bmp->db_mapsize) {
IREAD_UNLOCK(ipbmap);
return -EINVAL;
}
if (nblocks > ((s64) 1 << bmp->db_maxfreebud)) {
/* the free space is no longer available */
IREAD_UNLOCK(ipbmap);
return -ENOSPC;
}
/* read in the dmap covering the extent */
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
if (mp == NULL) {
IREAD_UNLOCK(ipbmap);
return -EIO;
}
dp = (struct dmap *) mp->data;
/* try to allocate the requested extent */
rc = dbAllocNext(bmp, dp, blkno, nblocks);
IREAD_UNLOCK(ipbmap);
if (rc == 0)
mark_metapage_dirty(mp);
release_metapage(mp);
return (rc);
}
#endif /* _NOTYET */
/*
* NAME: dbReAlloc()
*
......
fs/jfs/jfs_dtree.c
View file @ e471e594
......@@ -2423,304 +2423,6 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
return 0;
}
#ifdef _NOTYET
/*
* NAME: dtRelocate()
*
* FUNCTION: relocate dtpage (internal or leaf) of directory;
* This function is mainly used by defragfs utility.
*/
int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
s64 nxaddr)
{
int rc = 0;
struct metapage *mp, *pmp, *lmp, *rmp;
dtpage_t *p, *pp, *rp = 0, *lp= 0;
s64 bn;
int index;
struct btstack btstack;
pxd_t *pxd;
s64 oxaddr, nextbn, prevbn;
int xlen, xsize;
struct tlock *tlck;
struct dt_lock *dtlck;
struct pxd_lock *pxdlock;
s8 *stbl;
struct lv *lv;
oxaddr = addressPXD(opxd);
xlen = lengthPXD(opxd);
jfs_info("dtRelocate: lmxaddr:%Ld xaddr:%Ld:%Ld xlen:%d",
(long long)lmxaddr, (long long)oxaddr, (long long)nxaddr,
xlen);
/*
* 1. get the internal parent dtpage covering
* router entry for the tartget page to be relocated;
*/
rc = dtSearchNode(ip, lmxaddr, opxd, &btstack);
if (rc)
return rc;
/* retrieve search result */
DT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
jfs_info("dtRelocate: parent router entry validated.");
/*
* 2. relocate the target dtpage
*/
/* read in the target page from src extent */
DT_GETPAGE(ip, oxaddr, mp, PSIZE, p, rc);
if (rc) {
/* release the pinned parent page */
DT_PUTPAGE(pmp);
return rc;
}
/*
* read in sibling pages if any to update sibling pointers;
*/
rmp = NULL;
if (p->header.next) {
nextbn = le64_to_cpu(p->header.next);
DT_GETPAGE(ip, nextbn, rmp, PSIZE, rp, rc);
if (rc) {
DT_PUTPAGE(mp);
DT_PUTPAGE(pmp);
return (rc);
}
}
lmp = NULL;
if (p->header.prev) {
prevbn = le64_to_cpu(p->header.prev);
DT_GETPAGE(ip, prevbn, lmp, PSIZE, lp, rc);
if (rc) {
DT_PUTPAGE(mp);
DT_PUTPAGE(pmp);
if (rmp)
DT_PUTPAGE(rmp);
return (rc);
}
}
/* at this point, all xtpages to be updated are in memory */
/*
* update sibling pointers of sibling dtpages if any;
*/
if (lmp) {
tlck = txLock(tid, ip, lmp, tlckDTREE | tlckRELINK);
dtlck = (struct dt_lock *) & tlck->lock;
/* linelock header */
ASSERT(dtlck->index == 0);
lv = & dtlck->lv[0];
lv->offset = 0;
lv->length = 1;
dtlck->index++;
lp->header.next = cpu_to_le64(nxaddr);
DT_PUTPAGE(lmp);
}
if (rmp) {
tlck = txLock(tid, ip, rmp, tlckDTREE | tlckRELINK);
dtlck = (struct dt_lock *) & tlck->lock;
/* linelock header */
ASSERT(dtlck->index == 0);
lv = & dtlck->lv[0];
lv->offset = 0;
lv->length = 1;
dtlck->index++;
rp->header.prev = cpu_to_le64(nxaddr);
DT_PUTPAGE(rmp);
}
/*
* update the target dtpage to be relocated
*
* write LOG_REDOPAGE of LOG_NEW type for dst page
* for the whole target page (logredo() will apply
* after image and update bmap for allocation of the
* dst extent), and update bmap for allocation of
* the dst extent;
*/
tlck = txLock(tid, ip, mp, tlckDTREE | tlckNEW);
dtlck = (struct dt_lock *) & tlck->lock;
/* linelock header */
ASSERT(dtlck->index == 0);
lv = & dtlck->lv[0];
/* update the self address in the dtpage header */
pxd = &p->header.self;
PXDaddress(pxd, nxaddr);
/* the dst page is the same as the src page, i.e.,
* linelock for afterimage of the whole page;
*/
lv->offset = 0;
lv->length = p->header.maxslot;
dtlck->index++;
/* update the buffer extent descriptor of the dtpage */
xsize = xlen << JFS_SBI(ip->i_sb)->l2bsize;
/* unpin the relocated page */
DT_PUTPAGE(mp);
jfs_info("dtRelocate: target dtpage relocated.");
/* the moved extent is dtpage, then a LOG_NOREDOPAGE log rec
* needs to be written (in logredo(), the LOG_NOREDOPAGE log rec
* will also force a bmap update ).
*/
/*
* 3. acquire maplock for the source extent to be freed;
*/
/* for dtpage relocation, write a LOG_NOREDOPAGE record
* for the source dtpage (logredo() will init NoRedoPage
* filter and will also update bmap for free of the source
* dtpage), and upadte bmap for free of the source dtpage;
*/
tlck = txMaplock(tid, ip, tlckDTREE | tlckFREE);
pxdlock = (struct pxd_lock *) & tlck->lock;
pxdlock->flag = mlckFREEPXD;
PXDaddress(&pxdlock->pxd, oxaddr);
PXDlength(&pxdlock->pxd, xlen);
pxdlock->index = 1;
/*
* 4. update the parent router entry for relocation;
*
* acquire tlck for the parent entry covering the target dtpage;
* write LOG_REDOPAGE to apply after image only;
*/
jfs_info("dtRelocate: update parent router entry.");
tlck = txLock(tid, ip, pmp, tlckDTREE | tlckENTRY);
dtlck = (struct dt_lock *) & tlck->lock;
lv = & dtlck->lv[dtlck->index];
/* update the PXD with the new address */
stbl = DT_GETSTBL(pp);
pxd = (pxd_t *) & pp->slot[stbl[index]];
PXDaddress(pxd, nxaddr);
lv->offset = stbl[index];
lv->length = 1;
dtlck->index++;
/* unpin the parent dtpage */
DT_PUTPAGE(pmp);
return rc;
}
/*
* NAME: dtSearchNode()
*
* FUNCTION: Search for an dtpage containing a specified address
* This function is mainly used by defragfs utility.
*
* NOTE: Search result on stack, the found page is pinned at exit.
* The result page must be an internal dtpage.
* lmxaddr give the address of the left most page of the
* dtree level, in which the required dtpage resides.
*/
static int dtSearchNode(struct inode *ip, s64 lmxaddr, pxd_t * kpxd,
struct btstack * btstack)
{
int rc = 0;
s64 bn;
struct metapage *mp;
dtpage_t *p;
int psize = 288; /* initial in-line directory */
s8 *stbl;
int i;
pxd_t *pxd;
struct btframe *btsp;
BT_CLR(btstack); /* reset stack */
/*
* descend tree to the level with specified leftmost page
*
* by convention, root bn = 0.
*/
for (bn = 0;;) {
/* get/pin the page to search */
DT_GETPAGE(ip, bn, mp, psize, p, rc);
if (rc)
return rc;
/* does the xaddr of leftmost page of the levevl
* matches levevl search key ?
*/
if (p->header.flag & BT_ROOT) {
if (lmxaddr == 0)
break;
} else if (addressPXD(&p->header.self) == lmxaddr)
break;
/*
* descend down to leftmost child page
*/
if (p->header.flag & BT_LEAF) {
DT_PUTPAGE(mp);
return -ESTALE;
}
/* get the leftmost entry */
stbl = DT_GETSTBL(p);
pxd = (pxd_t *) & p->slot[stbl[0]];
/* get the child page block address */
bn = addressPXD(pxd);
psize = lengthPXD(pxd) << JFS_SBI(ip->i_sb)->l2bsize;
/* unpin the parent page */
DT_PUTPAGE(mp);
}
/*
* search each page at the current levevl
*/
loop:
stbl = DT_GETSTBL(p);
for (i = 0; i < p->header.nextindex; i++) {
pxd = (pxd_t *) & p->slot[stbl[i]];
/* found the specified router entry */
if (addressPXD(pxd) == addressPXD(kpxd) &&
lengthPXD(pxd) == lengthPXD(kpxd)) {
btsp = btstack->top;
btsp->bn = bn;
btsp->index = i;
btsp->mp = mp;
return 0;
}
}
/* get the right sibling page if any */
if (p->header.next)
bn = le64_to_cpu(p->header.next);
else {
DT_PUTPAGE(mp);
return -ESTALE;
}
/* unpin current page */
DT_PUTPAGE(mp);
/* get the right sibling page */
DT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
if (rc)
return rc;
goto loop;
}
#endif /* _NOTYET */
/*
* dtRelink()
*
......
fs/jfs/jfs_extent.c
View file @ e471e594
......@@ -16,9 +16,6 @@
* forward references
*/
static int extBalloc(struct inode *, s64, s64 *, s64 *);
#ifdef _NOTYET
static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
#endif
static s64 extRoundDown(s64 nb);
#define DPD(a) (printk("(a): %d\n",(a)))
......@@ -177,162 +174,6 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
return (0);
}
#ifdef _NOTYET
/*
* NAME: extRealloc()
*
* FUNCTION: extend the allocation of a file extent containing a
* partial back last page.
*
* PARAMETERS:
* ip - the inode of the file.
* cp - cbuf for the partial backed last page.
* xlen - request size of the resulting extent.
* xp - pointer to an xad. on successful exit, the xad
* describes the newly allocated extent.
* abnr - bool indicating whether the newly allocated extent
* should be marked as allocated but not recorded.
*
* RETURN VALUES:
* 0 - success
* -EIO - i/o error.
* -ENOSPC - insufficient disk resources.
*/
int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
{
struct super_block *sb = ip->i_sb;
s64 xaddr, xlen, nxaddr, delta, xoff;
s64 ntail, nextend, ninsert;
int rc, nbperpage = JFS_SBI(sb)->nbperpage;
int xflag;
/* This blocks if we are low on resources */
txBeginAnon(ip->i_sb);
mutex_lock(&JFS_IP(ip)->commit_mutex);
/* validate extent length */
if (nxlen > MAXXLEN)
nxlen = MAXXLEN;
/* get the extend (partial) page's disk block address and
* number of blocks.
*/
xaddr = addressXAD(xp);
xlen = lengthXAD(xp);
xoff = offsetXAD(xp);
/* if the extend page is abnr and if the request is for
* the extent to be allocated and recorded,
* make the page allocated and recorded.
*/
if ((xp->flag & XAD_NOTRECORDED) && !abnr) {
xp->flag = 0;
if ((rc = xtUpdate(0, ip, xp)))
goto exit;
}
/* try to allocated the request number of blocks for the
* extent. dbRealloc() first tries to satisfy the request
* by extending the allocation in place. otherwise, it will
* try to allocate a new set of blocks large enough for the
* request. in satisfying a request, dbReAlloc() may allocate
* less than what was request but will always allocate enough
* space as to satisfy the extend page.
*/
if ((rc = extBrealloc(ip, xaddr, xlen, &nxlen, &nxaddr)))
goto exit;
/* Allocat blocks to quota. */
rc = dquot_alloc_block(ip, nxlen);
if (rc) {
dbFree(ip, nxaddr, (s64) nxlen);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
return rc;
}
delta = nxlen - xlen;
/* check if the extend page is not abnr but the request is abnr
* and the allocated disk space is for more than one page. if this
* is the case, there is a miss match of abnr between the extend page
* and the one or more pages following the extend page. as a result,
* two extents will have to be manipulated. the first will be that
* of the extent of the extend page and will be manipulated thru
* an xtExtend() or an xtTailgate(), depending upon whether the
* disk allocation occurred as an inplace extension. the second
* extent will be manipulated (created) through an xtInsert() and
* will be for the pages following the extend page.
*/
if (abnr && (!(xp->flag & XAD_NOTRECORDED)) && (nxlen > nbperpage)) {
ntail = nbperpage;
nextend = ntail - xlen;
ninsert = nxlen - nbperpage;
xflag = XAD_NOTRECORDED;
} else {
ntail = nxlen;
nextend = delta;
ninsert = 0;
xflag = xp->flag;
}
/* if we were able to extend the disk allocation in place,
* extend the extent. otherwise, move the extent to a
* new disk location.
*/
if (xaddr == nxaddr) {
/* extend the extent */
if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
dbFree(ip, xaddr + xlen, delta);
dquot_free_block(ip, nxlen);
goto exit;
}
} else {
/*
* move the extent to a new location:
*
* xtTailgate() accounts for relocated tail extent;
*/
if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
dbFree(ip, nxaddr, nxlen);
dquot_free_block(ip, nxlen);
goto exit;
}
}
/* check if we need to also insert a new extent */
if (ninsert) {
/* perform the insert. if it fails, free the blocks
* to be inserted and make it appear that we only did
* the xtExtend() or xtTailgate() above.
*/
xaddr = nxaddr + ntail;
if (xtInsert (0, ip, xflag, xoff + ntail, (int) ninsert,
&xaddr, 0)) {
dbFree(ip, xaddr, (s64) ninsert);
delta = nextend;
nxlen = ntail;
xflag = 0;
}
}
/* set the return results */
XADaddress(xp, nxaddr);
XADlength(xp, nxlen);
XADoffset(xp, xoff);
xp->flag = xflag;
mark_inode_dirty(ip);
exit:
mutex_unlock(&JFS_IP(ip)->commit_mutex);
return (rc);
}
#endif /* _NOTYET */
/*
* NAME: extHint()
*
......@@ -423,44 +264,6 @@ int extRecord(struct inode *ip, xad_t * xp)
return rc;
}
#ifdef _NOTYET
/*
* NAME: extFill()
*
* FUNCTION: allocate disk space for a file page that represents
* a file hole.
*
* PARAMETERS:
* ip - the inode of the file.
* cp - cbuf of the file page represent the hole.
*
* RETURN VALUES:
* 0 - success
* -EIO - i/o error.
* -ENOSPC - insufficient disk resources.
*/
int extFill(struct inode *ip, xad_t * xp)
{
int rc, nbperpage = JFS_SBI(ip->i_sb)->nbperpage;
s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
// assert(ISSPARSE(ip));
/* initialize the extent allocation hint */
XADaddress(xp, 0);
/* allocate an extent to fill the hole */
if ((rc = extAlloc(ip, nbperpage, blkno, xp, false)))
return (rc);
assert(lengthPXD(xp) == nbperpage);
return (0);
}
#endif /* _NOTYET */
/*
* NAME: extBalloc()
*
......@@ -550,64 +353,6 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
return (0);
}
#ifdef _NOTYET
/*
* NAME: extBrealloc()
*
* FUNCTION: attempt to extend an extent's allocation.
*
* Initially, we will try to extend the extent's allocation
* in place. If this fails, we'll try to move the extent
* to a new set of blocks. If moving the extent, we initially
* will try to allocate disk blocks for the requested size
* (newnblks). if this fails (new contiguous free blocks not
* available), we'll try to allocate a smaller number of
* blocks (producing a smaller extent), with this smaller
* number of blocks consisting of the requested number of
* blocks rounded down to the next smaller power of 2
* number (i.e. 16 -> 8). We'll continue to round down and
* retry the allocation until the number of blocks to allocate
* is smaller than the number of blocks per page.
*
* PARAMETERS:
* ip - the inode of the file.
* blkno - starting block number of the extents current allocation.
* nblks - number of blocks within the extents current allocation.
* newnblks - pointer to a s64 value. on entry, this value is the
* new desired extent size (number of blocks). on
* successful exit, this value is set to the extent's actual
* new size (new number of blocks).
* newblkno - the starting block number of the extents new allocation.
*
* RETURN VALUES:
* 0 - success
* -EIO - i/o error.
* -ENOSPC - insufficient disk resources.
*/
static int
extBrealloc(struct inode *ip,
s64 blkno, s64 nblks, s64 * newnblks, s64 * newblkno)
{
int rc;
/* try to extend in place */
if ((rc = dbExtend(ip, blkno, nblks, *newnblks - nblks)) == 0) {
*newblkno = blkno;
return (0);
} else {
if (rc != -ENOSPC)
return (rc);
}
/* in place extension not possible.
* try to move the extent to a new set of blocks.
*/
return (extBalloc(ip, blkno, newnblks, newblkno));
}
#endif /* _NOTYET */
/*
* NAME: extRoundDown()
*
......
fs/jfs/jfs_logmgr.c
View file @ e471e594
......@@ -388,14 +388,6 @@ lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
p = (caddr_t) &JFS_IP(tlck->ip)->i_xtroot;
linelock = (struct linelock *) & tlck->lock;
}
#ifdef _JFS_WIP
else if (tlck->flag & tlckINLINELOCK) {
inlinelock = (struct inlinelock *) & tlck;
p = (caddr_t) & inlinelock->pxd;
linelock = (struct linelock *) & tlck;
}
#endif /* _JFS_WIP */
else {
jfs_err("lmWriteRecord: UFO tlck:0x%p", tlck);
return 0; /* Probably should trap */
......
fs/jfs/jfs_mount.c
View file @ e471e594
......@@ -307,13 +307,11 @@ static int chkSuper(struct super_block *sb)
}
bsize = le32_to_cpu(j_sb->s_bsize);
#ifdef _JFS_4K
if (bsize != PSIZE) {
jfs_err("Currently only 4K block size supported!");
jfs_err("Only 4K block size supported!");
rc = -EINVAL;
goto out;
}
#endif /* _JFS_4K */
jfs_info("superblock: flag:0x%08x state:0x%08x size:0x%Lx",
le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),
......
fs/jfs/jfs_txnmgr.c
View file @ e471e594
......@@ -1490,40 +1490,6 @@ static void diLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
tlck->flag |= tlckWRITEPAGE;
} else
jfs_err("diLog: UFO type tlck:0x%p", tlck);
#ifdef _JFS_WIP
/*
* alloc/free external EA extent
*
* a maplock for txUpdateMap() to update bPWMAP for alloc/free
* of the extent has been formatted at txLock() time;
*/
else {
assert(tlck->type & tlckEA);
/* log LOG_UPDATEMAP for logredo() to update bmap for
* alloc of new (and free of old) external EA extent;
*/
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
pxdlock = (struct pxd_lock *) & tlck->lock;
nlock = pxdlock->index;
for (i = 0; i < nlock; i++, pxdlock++) {
if (pxdlock->flag & mlckALLOCPXD)
lrd->log.updatemap.type =
cpu_to_le16(LOG_ALLOCPXD);
else
lrd->log.updatemap.type =
cpu_to_le16(LOG_FREEPXD);
lrd->log.updatemap.nxd = cpu_to_le16(1);
lrd->log.updatemap.pxd = pxdlock->pxd;
lrd->backchain =
cpu_to_le32(lmLog(log, tblk, lrd, NULL));
}
/* update bmap */
tlck->flag |= tlckUPDATEMAP;
}
#endif /* _JFS_WIP */
return;
}
......
fs/jfs/jfs_xtree.c
View file @ e471e594
This diff is collapsed.
fs/jfs/jfs_xtree.h
View file @ e471e594
......@@ -95,10 +95,6 @@ extern int xtInsert(tid_t tid, struct inode *ip,
int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen,
int flag);
#ifdef _NOTYET
extern int xtTailgate(tid_t tid, struct inode *ip,
s64 xoff, int xlen, s64 xaddr, int flag);
#endif
extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad);
extern int xtDelete(tid_t tid, struct inode *ip, s64 xoff, int xlen,
int flag);
......
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